Telephone apparatus with recording and reproducing functions

Telephone equipment with recording and playback functions

The invention relates to a telephone device with a recording function.

A telephone device with a recording function is known, which is used to send and receive telephone signals and to record voice signals in the telephone signals.

Japanese Patent Application Provisional Publication No. 8-289002 discloses a recording and reproducing device for telephone equipment, which records according to the result of comparing the detected voice level of the transmitted digital voice signal and the received digital voice signal Send or receive digital voice signals. In addition, when the two voice levels are lower than a predetermined value, no digital voice signal is recorded to provide a longer recording period.

The object of the present invention is to provide an improved telephone device with recording function.

According to the present invention, there is provided a first telephone device with recording and playback functions, which includes: a microphone for receiving a first voice and generating a first voice signal; and a transmission signal processing part, which includes modulating the first voice signal to/ A first analog-to-digital converter that converts data into first voice data, and a first encoder that encodes the first voice data and generates first encoded voice data; a sending circuit is used to generate the first encoded voice data Send a signal and send the signal to the network; receiving circuit, used to receive the received signal from the network; memory circuit, used to store data and read the stored data; switch, used to output the received signal from the receiving circuit or read out The stored data; the receiving signal processing part, which includes a decoder for decoding the output of the switch, and a digital/analog converter for converting the output digital/analog of the decoder into an analog voice signal; an adder, It is used to add the first voice signal to the analog voice signal; the voice generation part is used to generate and output the second voice from the output of the adder; and the recording signal processing part includes the analog/digital conversion of the output of the adder into the first A second analog/digital converter for two voice signals, and a second encoder that encodes the second voice data and generates second encoded voice data, the memory circuit stores the second encoded voice data as data in the recording mode, and the memory circuit The sum switch supplies the read stored data to the decoder in the playback mode.

The first telephone device may further include: a communication detection section responsive to an operation switch and the receiving circuit for detecting a non-communication state; and a sleep mode control section that causes the transmission signal processing section to be in the detected non-communication state And the received signal processing part is in a sleep state, the circuit signal processing part is in one operating state in the recording mode, and the received signal processing part is in another operating state in the playback mode to perform data read from the memory circuit Decoding.

According to the present invention, a second telephone device with recording and playback functions for communicating with a digital network is provided, which includes: a microphone for receiving a first voice and generating a first voice signal; a single digital signal processor, which includes : Transmitting signal processing part, which includes a first analog/digital converter that converts the first voice signal analog/digital to the first voice data, and time-compresses the first voice data to output the timing of the first frame of the dialogue frame interval A time compression part of the first voice data and a first encoder that encodes the first voice data from the time compression part and generates the first encoded voice data; a transmitting circuit for generating a transmission signal from the first encoded voice data and The signal is sent to the network; the receiving circuit is used to receive the received signal from the network; the memory circuit is used to store data and read the stored data; the switch is used to output the received signal from the receiving circuit or read the stored data ; A single digital signal processor, which also includes: a receiving signal processing part, which includes a decoder for decoding the output of the switch, a time extension part for time extension of the output of the decoder, and an output of the time extension part Digital/analog converter that converts digital/analog to analog voice signal; adder, used to add the first voice signal to the analog voice signal; voice generation part, used to generate and output the second voice from the output of the adder; single The digital signal processing part also includes: a recording signal processing part, which includes a second analog/digital converter that converts the output of the adder into a second voice signal; The output of the digital converter is time compressed to output the second time compression part of the second voice data for at least one frame timing of the voice frame interval except for the first and second frame timings, and to encode and combine the output of the second time compression part. The first encoder that generates the second encoded voice data, the memory circuit stores the second encoded voice data as data in the recording mode, the memory circuit and the switch provide the read data to the received signal processing part in the playback mode; and The time division multiplexing operation part of a frame signal is used to operate the first encoder, the second encoder and the decoder in the time division multiplexing mode.

According to the present invention, a third telephone device with recording and playback functions is provided, which includes: a microphone for receiving a first voice and generating a first voice signal; and a transmission signal processing part, which includes performing a simulation on the first voice signal. The first analog/digital converter of the analog/digital conversion, the first encoder that encodes the first voice signal from the analog/digital converter; the voice presence detection portion of the transmission signal processing portion responds to the transmission signal processing Part of the voice parameter detects whether there is a first voice signal; a sending circuit is used to generate a sending signal from the first voice signal from the sending signal processing part and send the signal to the network; a receiving circuit is used to receive the reception from the network Signal; a memory circuit for storing data in the recording mode and reading the stored data in the playback mode; in response to the first switch of the voice presence detection section, the voice presence detection section detects the presence of the first voice signal The first voice signal from the transmission signal processing section is provided as data to the memory circuit, and when the voice presence detection section detects that the first voice signal does not exist, the received signal is output to the memory circuit as data; the second switch is used to reproduce Output the read data in the playback mode, and output the received signal from the receiving circuit in the non-playback mode; the receiving signal processing part, which includes a decoder for decoding the output of the second switch, and a decoder for decoding A digital/analog converter that converts the output of the receiver into an analog voice signal; a voice generating part is used to generate and output a second voice from the output of the received signal processing part.

According to the present invention, a fourth telephone device with recording and playback functions is provided, which includes: a microphone for receiving voice and generating a first voice signal; and a transmission signal processing part, which includes performing analog/digital processing on the first voice signal. The converted first analog-to-digital converter, the first encoder that encodes the first voice signal from the analog-to-digital converter, and the detection of the first encoded data using the first error detection data from the first encoder Error encoder; sending circuit for generating a sending signal from the first encoded data and sending the signal to the network; responding to the voice presence detection part of the sending signal processing part, for detecting whether or not by sending the voice parameters of the signal processing part There is a first voice signal; the sending circuit is used to generate a signal from the first voice signal from the sending signal processing part and output the signal to the network; the receiving circuit is used to receive the received signal from the network; the error correction part is passed Use the second error detection data contained in the received signal to correct the received signal from the receiving circuit; respond to the frame signal representing the frame interval and the frame state detection section of the error correction section for detecting the frame state of the received signal for the frame interval And generate frame status data; in response to the data addition part of the frame signal, it is used to add frame status data to the received signal from the error correction part; the memory circuit is used to store data in the recording mode and in the playback mode Read the stored data; in response to the first switch of the voice presence detection section, when the voice presence detection section detects the presence of the first voice signal, the first voice signal from the transmission signal processing section is provided as data to the memory circuit to store the first voice signal When the voice presence detection part does not detect the presence of the first voice signal, the received signal is output to the memory circuit as data; the second switch is used to output the read data in the playback mode and in the non-playback mode Output the received signal from the receiving circuit; the received signal processing part, which includes a decoder for decoding the output of the second switch, and a digital/analog converter for converting the output of the decoder into an analog voice signal; The voice generation part is used to generate and output the second voice from the output of the received signal processing part; the data detection part is used to detect the frame status data in the second switch output; and the memory control part is used to indicate the frame status data The memory is prohibited from storing data in the recording mode when the voice frame is in a good state.

In the fourth telephone device, the error correction section generates error correction data at every frame interval, and the frame state detection section detects the frame state from the error bit data. When the frame state data indicates that the value of the error bit data is greater than a predetermined value, the memory controls Partially prohibits the storage of data in the memory in the recording mode.

In the fourth telephone device, the frame state detection section detects the frame state of the received signal from the error correction section, and when the frame state data indicates that the received signal from the error correction section is silent frame data, the memory control section prohibits the recording mode The memory stores data.

The purpose and features of the present invention will become apparent from the following detailed description in conjunction with the accompanying drawings, in which: Figure 1 is a block diagram of a telephone device with a recording function according to the first embodiment; Figure 2 shows the central processing unit shown in Figure 1 Fig. 3 is a block diagram of the telephone device of the second embodiment; Figs. 4A to 4C show a flowchart of the second embodiment of the operation of the output central processing unit; Fig. 5 is the telephone device of the third embodiment Block diagram

Fig. 6 is a block diagram of the telephone device of the fourth embodiment; and Fig. 7 shows a flowchart of the fourth embodiment.

The same or corresponding elements or parts are represented by the same reference numerals in all the figures.

The first embodiment of the present invention will be described below.

Fig. 1 is a block diagram of a telephone device with recording and reproducing functions according to the first embodiment.

The telephone device of the first embodiment includes a microphone 1 for receiving voice and generating a first voice signal, an amplifier 3 for amplifying the first voice signal, and analog/digital conversion of the first voice signal from the amplifier 3 into a first voice signal. A first analog/digital converter 6 for voice data, for encoding the first voice data to provide first encoded voice data 9a through efficient compression encoding processing, and a first encoder 9 for encoding voice data from the first The sending circuit 16 that generates the sending signal and sends the signal to the network 18, the receiving circuit 17 used to receive the received signal from the network 18, the memory circuit including the buffer 13 and the memory 15, used to store data and read the storage The data; used to output the received signal from the receiving circuit 17 or output from the memory circuit 66 to read the stored data of the selector 12, the decoder 11 used to decode the output of the selector 12, used to The output digital/analog converter 8 of the decoder converts the analog voice signal into an analog voice signal, which is used to treat the first voice signal as a side tone (side tone). The tone) signal is added to the amplifier 5 of the analog voice signal, the earphone (speaker) 2 that generates the voice according to the output of the amplifier 5, the second analog/digital converter 7 that converts the output of the amplifier 5 analog/digital into the second voice data, And the second encoder 10 that encodes the second voice data to generate the second encoded voice data through a high-efficiency compression coding process. The memory circuit 66 stores the second encoded voice data in the recording mode, and supplies the read data to the selector in the playback mode.

The central processing unit (cpu) 14 switches the selector 12 in response to commands from the operation panel 19, and performs various control operations in response to the operation panel 19 or calls from the network 18. Under the control of the central processing unit 14, the power control circuit 65 controls the power consumption in the analog/digital converters 6 to 8, the encoders 9 and 10, and the decoder 11. The transmission circuit and the reception circuit may be coupled to the network 18 through a cable, or the transmission circuit 16 and the reception circuit 17 may include a common antenna for transmission and reception and a duplexer for transmission and reception, which are omitted in FIG. 1.

Operation description.

The microphone 1 receives voice and generates a first voice signal. The amplifier 3 amplifies the first voice signal. The first analog/digital converter 6 performs analog/digital conversion on the first voice signal from the amplifier 3 to output first voice data. The first encoder 9 encodes the first voice data and generates the first encoded voice data 9a through a high-efficiency compression coding process. The transmission circuit 16 generates a transmission signal from the first encoded voice data and transmits the signal to the network 18. The transmission circuit 16 transmits the transmission signal to the network 18 through a circuit or an antenna (not shown) and receives a reception signal through the circuit or an antenna.

The receiving circuit 17 receives the received signal from the network 18. The decoder 11 decodes the received signal from the receiving circuit 17 in the communication mode, and decodes the output of the buffer 13 through the selection of the selector 12 in the playback mode. The digital/analog converter 8 converts the output of the decoder 11 into an analog voice signal. The amplifier 5 adds the first voice signal as a side tone signal to the analog voice signal from the digital/analog converter 8, and the gain of the converter 8 is adjusted by the side tone. The earphone 2 generates speech according to the output of the amplifier 5.

The second A/D converter 7 converts the output A/D of the amplifier 5 into second data. The second encoder 10 encodes the second voice data to output the second encoded voice data through a high-efficiency compression encoding process. The memory circuit 66 stores the voice data from the encoder 10 in the recording mode (recording in the communication mode and recording in the backup mode). The memory circuit 66 reads the stored data and supplies the data to the decoder 11 in the playback mode.

The central processing unit 14 switches the selector 12 in response to a command from the operation panel 19, that is, the central processing unit 14 responds to a recording command from the operation panel 19 (a recording command in the communication mode and a recording command in the backup mode). The voice data of 10 is stored in the memory 15.

The central processing unit 14 enters the communication mode in response to dialing operations on the operation panel 19 and calls from the network 18.

FIG. 2 shows a flowchart of the control operation of the output central processing unit 14, which is obtained from a program stored in the central processing unit 14.

In the backup mode, by processing steps s1, s12, s18, and s20, the central processing unit 14 waits for a call from the network 18 or dialing operation through the operation panel 19 in step s1, and in step s12 in the backup mode from the operation panel 19 The recording command, and the replay command from the operation panel 19 in step s18.

If the recording command is detected in the backup mode of step s12, the central processing unit 14 stores the voice data from the encoder 10 in step s13.

If a playback command in the backup mode is detected in step s18, the central processing unit 14 plays back the voice data in the memory 15 in step s19, and switches the selector 12 to supply the read data to the decoder 11.

In the communication mode, that is, in the state of the dialing operation, in step s1 the call arrives and the network is connected to the telephone device, and in step s3 the telephone device enters the communication mode, that is, the central processing unit 14 switches the selector to transfer from the receiving circuit 17 The received signal is provided to the decoder 11. In the communication mode, if there is a communication mode recording command from the operation panel 19, the central processing unit 14 records the encoded voice data from the encoder 10.

The central processing unit 14 controls the power control circuit 65 to control the power consumption in the analog/digital converters 6 to 8, the encoders 9 and 10, and the decoder 11 under the control of the central processing unit 14 as described above.

In step s20, that is, in the backup mode, the central processing unit 14 controls the power control circuit 65 to suppress the power consumption in the A/D converters 6 to 8, the encoders 9 and 10, and the decoder 11, and selects The receiver 12 is switched to the receiving circuit 17 side.

In the communication mode of step s3, the central processing unit 14 switches the selector 12 to the side of the receiving circuit 17, and uses the power control circuit 65 to operate the A/D converters 6 and 8, the encoder 9 and the decoder 11 to pass The network 18 communicates with a third party. In addition, in the communication mode, the recording command is detected in step s6, and the central processing unit 14 operates the analog/digital converter 7 and the encoder 10 to store the encoded voice data from the encoder 10 in the memory 15.

In step s13, with the recording command in the backup mode, the central processing unit 14 operates the A/D converter 7 and the encoder 10 through the power control circuit 65, that is, the central processing unit 14 causes the A/D converters 6 and 8, encoding The device 9 and the decoder 11 sleep.

In the playback mode of step s19, the central processing unit 14 operates the decoder 11 and the D/A converter 8 to reproduce the read data from the memory 15, that is, the central processing unit 14 makes the A/D converters 6 and 7 And encoders 9 and 10 sleep.

The second embodiment will be described. Fig. 3 is a block diagram of the telephone device of the second embodiment.

The telephone device of the second embodiment has basically the same structure as the telephone device of the first embodiment. The difference is that a single digital signal processor (DSP) provides analog/digital conversion operations, digital/analog conversion operations, encoding operations, and decoding operations in a time-division multiplexing operation.

4A to 4C show a flowchart of the operation of the central processing unit 14 shown in the second embodiment.

Since the network coupled to the telephone device of this second embodiment communicates with this telephone device through a digital method, the encoding and decoding operations can be provided by a single DSP 20 in a time division multiplexing operation.

In step s31, the central processing unit 14 executes the decoding work 111 of decoding the output of the selector 12 in response to the interruption of the frame A of a receiving interval in the voice frame. The central processing unit 14 detects the timing of the frame A in response to the frame signal 67 from the frame signal detection circuit 68 in response to the receiving circuit 17. The decoding work 111 decodes the output of the selector 12, the time expansion work 64 time-expands the encoded voice signal from the decoding work 111, and the digital/analog conversion work 108 performs digital/analog conversion on the output of the time-expansion work 64 .

In step s32, the central processing unit 14 performs an encoding work 109 for encoding the output from the amplifier 3 in response to the interruption of the frame A'of one transmission interval in the voice frame. The central processing unit 14 detects the timing of the frame Ain response to the frame signal 67 from the frame signal detection circuit 68 in response to the receiving circuit 17. The analog/digital conversion task 106 performs analog/digital conversion on the output of the amplifier 3, and the time compression task 62 performs time compression and output on the output of the analog/digital conversion task 106 in frame A'. The encoding work 109 encodes the output of the time compression work 62 in the frame interval A'.

In step s33, the central processing unit 14 executes the encoding work 110 of encoding the output from the amplifier 5 in response to the interruption of the frame B'of one transmission interval in the voice frame other than the frame A'. The central processing unit 14 detects the timing of the frame Bin response to the frame signal 67 from the frame signal detection circuit 68 responsive to the receiving circuit 17. The analog/digital conversion task 107 performs analog/digital conversion on the output of the amplifier 5, and the time compression task 63 performs time compression and output on the output of the analog/digital conversion task 106 in frame B'. The encoding work 110 encodes the output of the time compression work 63 in the frame interval B'.

As mentioned above, a single DSP 20 provides time division multiplexer operation. However, the analog/digital conversion tasks 106 and 107 and the digital/analog conversion task 108 do not operate in a time division multiplexing manner.

On the other hand, similar to the first embodiment, by selectively performing A/D conversion work 106, time compression work 62, and encoding work 109, A/D conversion work 107, time compression work 64, and encoding work 109 or decoding Job 111, time extension job 65, and digital/analog conversion job 108 provide power saving operations.

The third embodiment will be described.

Fig. 5 is a block diagram of the telephone device of the third embodiment.

The telephone device of the third embodiment includes a microphone 1 for receiving voice and generating a first voice signal; a transmission signal processing section 51 includes a first analog/digital converter 6 for performing analog/digital conversion on the first voice signal , And a first encoder 9 for encoding the first voice signal from the analog/digital converter; the voice presence detection circuit 26 in response to the encoder 9 is used to detect whether there is a voice parameter by sending the signal processing part The first voice signal and the error detection encoder 28 are used to generate voice data with an error detection code from the first voice signal from the encoder 9; and are used to generate transmission from the first voice signal from the transmission signal processing section 51. Signal and send the signal to the sending circuit 16 of the network 18; the receiving circuit 17 for receiving the received signal from the network 18; the buffer 13 and the memory 15 for storing data and reading the stored data; in response to voice The first selector 30 of the presence detection circuit 26 supplies the first voice signal from the encoder 9 as data to the buffer 13 when the voice presence detection circuit 26 detects the presence of the first voice signal, and when the voice presence detection circuit 26 When the presence of the first voice signal is not detected, the received signal is output to the memory circuit 15 as data; the second selector 31 for outputting the received signal from the receiving circuit or outputting the read-out stored data; the received signal processing section 52, including A decoder 11 that decodes the output of the second switching device, and a digital/analog converter that converts the output of the decoder 11 into an analog voice signal; and an earphone that generates the second voice from the output of the received signal processing section (Speaker) 2. The memory circuit 15 stores the second encoded voice data in the recording mode, and supplies the read data stored in the playback mode to the second selector 31 in the playback mode.

The microphone 1 receives voice and generates a first voice signal. The first analog/digital converter 6 performs analog/digital conversion on the first voice signal. The encoder 9 encodes the first voice signal from the analog/digital converter 6. The voice presence detection circuit 26 in response to the encoder 9 detects the presence or absence of the first voice signal in each voice frame by transmitting the voice parameters of the signal processing section. The error detection encoder 28 generates voice data from the error detection code of the first voice signal from the encoder 9. The transmission circuit 16 generates a transmission signal from the first voice signal from the error detection encoder 28 and transmits the signal to a network 18 such as a digital telephone line. The receiving circuit 17 receives the received signal from the network 18. The buffer 13 and the memory 15 store the data from the selector 30 in each voice frame under the control of the central processing unit 14 and read the stored data. In response to the first selector 30 of the voice presence detection circuit 26, the first voice signal from the encoder 9 is provided as data to the buffer 13 when the voice presence detection circuit 26 detects the presence of the first voice signal, and when the voice is present When the detection circuit 26 does not detect the presence of the first voice signal, the received signal is output to the memory circuit 15 as data. The second selector 31 outputs the received signal from the receiving circuit in the communication (non-playback) mode, and outputs the read data in the playback mode. The decoder 11 decodes the output of the second selector 31. The digital/analog converter 8 converts the output of the decoder 11 into an analog voice signal. The memory circuit 15 stores the second encoded voice data in the recording mode, and supplies the read data to the second selector 31 in the playback mode.

When the voice presence detection circuit 26 does not detect the presence of the first voice signal, the error detection encoder 28 does not provide data, that is, the transmission data of the transmission signal processing part has no voice parameters.

The voice presence detection circuit 26 controls the selector 30 without the control of the central processing unit 14, so that the first transmission voice is recorded before the voice signal in the received signal is recorded. In other words, the first voice is recorded regardless of whether there is voice in the received signal. The voice presence detector 26 also controls the error detection encoder 28 to provide discontinuous transmission in each voice frame. That is, when there is substantially no voice, the voice presence detection circuit 26 stops sending voice data.

The fourth embodiment will be described.

Fig. 6 is a block diagram of the telephone device of the fourth embodiment.

The telephone device of the fourth embodiment has basically the same structure as the telephone device of the third embodiment. The difference lies in the addition of a frame state detector 35, a data adder 36, and a frame state data detector 32. In addition, the decoder 27 replaces the decoder 11, the error correction decoder 29' replaces the error correction decoder 29, and the central processing unit 14 stores the data from the selector 30 in the memory 15 according to the frame status data.

The transmission signal is transmitted similarly to the third embodiment.

The receiving circuit 17 receives the received signal. The error correction decoder 29' performs error correction similar to the third embodiment, that is, outputs error-corrected voice data in each voice frame. In addition, the error correction decoder 29' detects error bits and supplies the error bit data to the frame state detector 35 in each voice frame. The frame state detector 35 detects the frame state from the erroneous bit data and generates frame state data. The data adder 36 adds (attaches) the frame status data to the voice data of which the voice frame has been error-corrected at a predetermined position of the voice frame.

Each voice frame of voice data and frame status data are provided to selectors 30 and 31.

In the communication state, the voice frame of the voice data and the frame state data are supplied to the decoder 27 and the frame state data detector 32. The frame state data detector 32 detects frame state data located at a predetermined position in each frame in response to the frame signal. The decoder 27 decodes the received voice data in each voice frame according to the frame state detected from the frame state data detector 32 to provide adaptive decoding.

Fig. 7 shows a flowchart of the fourth embodiment.

The central processing unit 14 stores the voice data from the selector 30 according to the frame status data in each frame. In the saved memory recording mode, the central processing unit 14 detects the status data in steps s71 and s72, and the central processing unit 14 determines whether the status data meets a predetermined condition (reference). If the status data meets the predetermined condition, that is, the reception status is good, the central processing unit 14 stores the received voice data in step s73. If the status data does not satisfy the predetermined condition in step s72, the central processing unit 14 selectively stores the received voice data according to the frame status data representing the voice data reception status.

The frame state detector 35 also detects the mute state of the received voice data for each frame in response to the error-corrected voice, and generates frame state data having a value representing the mute state. The frame state detector 35 detects the silent state by detecting whether the erroneous bit data is an erroneous voice frame or a silent frame.

The data adder 36 adds the frame state data representing the silent state in each frame to each frame of the error-corrected voice data. The frame state data representing the silent state is detected and used as described above. That is, if the frame state data indicates a silent state, the central processing unit 14 does not store the received voice data to save the memory area used.

The frame state detector 32 detects the frame state data output from the selector 31. The decoder 27 decodes the output of the selector 31 according to the output of the frame state data detector 32. That is, if the frame state data indicates that the received state is not good, the decoder 27 stops outputting voice data to the digital/analog converter 8 to suppress the noise voice from the earphone 2.

Since the status data is added to the output of the error correction decoder 29', the status data is directly supplied from the data adder 36 and also through the memory 15 to the frame status data detector 32. Since the voice data from the microphone is not affected during transmission and reception, no additional status data is required.

In the prior art telephone equipment with recording and playback functions, only the voice on the receiving or transmitting side is recorded, or when the sound level on the receiving side is greater than the sound level on the transmitting side, it is impossible to record the transmitting side. Voice.

The present invention is characterized by a recording circuit that includes an A/D converter 7 and an encoder 10 to encode and compress speech including sidetones, thereby supplying the compressed data to the buffer and then supplying it Stored in memory. Accordingly, a clear two-way recording is provided. In addition, the present invention also features a voice presence detector 26, so that when there is a voice on the sending side during a conversation, the voice on the sending side is automatically recorded preferentially, so that the conversation can be easily understood during reproduction.