System and receiver as well as method of reproduction of audio and video data

0001The invention relates to a system, a receiving device and method for Playing audio and video data.

0002is When playing audio data in the form of music in a motor vehicle it is known, the CD changer (CD = Compact Disc) to be used, so that during driving several CD's can be heard in succession without a CD must be substituted. With a capacity of up to 10 CD's Playing times of up to 12 hours are thus accessible in a CD changer.

0003A disadvantage, however, the increased space requirement and the relatively high base price for such devices from.

0004For stored video information is such a mobile device change not known.

0005Object of the present invention is a system, a receiving device and a method for reproducing audio and video data, in particular in a mobile device, specify where or not stockpiling necessary is.

0006This object is solved by the features of claims 1, 9 and 12. FIG.

0007A central idea of ​​the present invention is desired audio and / or Video data fixedly held in readiness. On request, these audio and video data can then with the aid of a spark gap of the fixed dispensing unit transmitted to a mobile receiving device, and there in a buffer are stored. The higher is the transmission rate, the shorter the total transmission time. By resorting to the memory in the intermediate stored data can then be an ordinary player used for playback will.

0008To carry out the invention, it is necessary first of the mobile request receiving means of desired data, for which a corresponding Request command should be taken in to the fixed dispensing unit. The stationary dispensing unit in turn is in response to this output demand the desired audio and / or video data. To facilitate the mobility of the receiving device not to interfere, should in the transmission of data from the stationary dispensing unit to the mobile receiving device comprises at least a radio link be used. In the mobile receiving device, the received Data is then recorded in a memory and, depending on operator request are reproduced through the player.

0009The present invention can be on all communication of audio and video data apply.

0010The advantage of this is when a stationary dispensing unit a computer unit a memory means is used on the recorded audio and video data are. Such a computer unit by means of a modem or Interfaces to be connected to a communication device, which is example is a phone, and taking advantage of this compound Data transfer. On the side of the receiving device is a mobile telephone then provided which serves as a communication device. To fast be able to perform transmission of audio and video data, is a transmission in compressed form of advantage. For this, the audio or video data should be based on present the side of the dispensing unit in compressed form or compressed. On the side of the receiving device, the data must again decompressed will. As latch can be any writable storage unit use. For some time it is also known, data on removable smart card store, which are then introduced in a read or playback device.

0011To the stationary dispensing unit not to have to keep constantly in operation, it is furthermore advantageous to form these dispensing unit woken so that only at a Request signal, the dispensing unit is activated.

0012The present invention will be with reference to a particularly preferred embodiment and explained with reference to the single drawing. The only Drawing depicts a schematic block diagram.

0013A particularly interesting field of application is the transmission of audio and video data to call on motor vehicles. However, other areas of application, example for other means of transportation or luxurios further developed mobile phones, are conceivable.

0014The present invention is based on an example of use in a vehicle explained in more detail. A (not shown) vehicle includes a mobile Receiving means 30 which comprises a central unit 32, in which a turn writable buffer is 38th The central unit 32 is connected to a Input device 34 is connected, through which an operator commands to the central unit can transmit 32nd The central processing unit 32 also includes a (not shown in detail) Car radio, which with two speakers 36 for playing audio signals serves.

0015The central unit 32 is on the other side with a mobile telephone unit 42 connected, which emit signals via an antenna 44 connected to it and can receive. Such mobile phones are included frequently in vehicles.

0016The remote station a fixed dispensing unit 10 is in the form of a personal computer (PC) 12 is provided, which also contains a storage medium fourteenth On this storage medium is audio data in compressed form, for example in MP3 format. The PC is equipped with a modem 16, or alternatively a digital adapter (eg ISDN card), via the or he is in the can dial PSTN. The public telephone network is here by numeral 18 indicated. The public telephone network via different Allowed Transmitting and receiving devices 20 to communicate with mobile phones.

0017The operation of the described apparatus will be explained. On Operator inputs via the input device 34 different musical wishes to the CPU 32 a. The central processing unit 32 generates a request signal which passed via the modem 40 to the mobile telephone unit 42 and from this is radiated through the antenna 44th The request signal from the receiving means received 20 and via the public telephone network at passed modem 16 that the personal computer 12 wakes first, ie activated. Thereafter, the personal computer 12 is the request signal transmitted, which then from the memory unit 14, the compressed data for related music and selects via the modem 16, the public switched telephone network 18 and the transmitting unit 20 is transmitted back to the mobile receiving device 30th The antenna 44 of the mobile receiving apparatus 30 receives these signals and outputs them via the mobile phone device 42 and the modem 40 from the central processing unit 32, where they are decoded and in the intermediate storage 38 be saved. Depending on the operator can then request from the buffer memory 38 in the stored music through the audio system and speakers 36 reproduced.

0018Alternatively to the illustrated embodiment, the mobile from the receiving unit received data is stored on a chip card. The Smart card in turn can be inserted into a separate audio device known and be played by this. The above method is already possible in principle. The information of about 100 music CDs with a playing time each for about 70 minutes require a space of approximately 7 gigabytes. Storage medium having such a storage capacity is already available. Incidentally, the well-known Windows, for example, 98 (registered trademark) Operating system via an external modem woken. Furthermore Mobile devices are being tested already, the transmission rate over a up to 2 Mbits / s have. The transmission equipment in Vehicle can rely on optical buses that transfer rates can be carried out up to 22 Mbit / s. Overall, one can therefore assume that in the future a CD be loaded in about 30 seconds can, so that keep the costs thereby transmission rates within limits.

0019A corresponding transfer is of course also conceivable for video data.

0020Overall, with the present invention, a device created by the to deploy in a stationary dispensing unit data in virtually unlimited quantities leave. This data can then according to the invention in the future almost every Point of the world are retrieved, so that no large storage media in more mobile devices must be provided.