Nova Patents
JP2006171663A

Demodulated sound signal level decision system

Abstract

[Subject] If television broadcasting, a radio broadcast, etc. Have a difference in the amount of reproduced sounds between broadcast channels, you have to reset volume. Although much corrective strategy is enforced, there is nothing perfect in the light of people's sensitivity. [Solution means] Assume the contents, such as news, that the volume of the program which must be told correctly is a normal condition in any programs, use the judgment result of whether a signal is a speech signal, and if it is a speech signal, The difference in the volume between broadcast channels is automatically rectified by rectifying the amplification factor of the regenerator in that broadcast channel by making volume at this time into standard volume, in order to unite with the amount of reproduced sounds of expectation, and memorizing that amount of compensation. [Selection figure] Fig. 1

Term

Term ended

Projected expiry passed 18 December 2024, 1.8 years ago.

  1. Priority and filed
  2. Published
  3. Projected expiry
  4. Today

1 claim: 1 independent, 0 dependent

  1. 1
    The function that measures the level of the acoustic signal and determines the level is the level determination function, the output of the level determination function is the acoustic signal level, and the detection function that detects whether or not the content of the acoustic signal is a speech signal or its degree. Is a speech detection function, and a function that determines whether or not an input signal is a speech by determining the output state of the speech detection function is a speech determination function, and an acoustic signal when the speech determination function is determined to be a speech. The level is set as the speech signal level, and either the speech signal level, the value depending on the speech signal level, or the gain correction amount required to set the speech signal level to a predetermined level is stored in association with the received channel number at that time. The function to perform is the channel level correction amount storage function, and the function to determine the playback volume depending on the speech signal level or the stored level or the gain correction amount of the channel while the channel is selected is the channel level correction. A demodulated acoustic signal level determination method characterized in that it has at least the above-mentioned level determination function, speech detection function, and speech determination function. 音響信号のレベルを測定し そのレベルを判定する機能をレベル判定機能とし、レベル判定機能の出力を音響信号レベルとし、音響信号の内容がスピーチ信号であるか否か または その度合い を検出する検出機能をスピーチ検出機能とし、スピーチ検出機能の出力状態を判定することによって 入力信号がスピーチであるか否かを判定する機能をスピーチ判定機能とし、スピーチ判定機能がスピーチであると判定したときの音響信号レベルをスピーチ信号レベルとし、スピーチ信号レベル または スピーチ信号レベルに依存する値 または スピーチ信号レベルをあらかじめ定めたレベルとするに必要なゲイン補正量 のいずれかと、その時の受信チャネル番号 とを 対応づけて記憶する機能をチャネルレベル補正量記憶機能とし、そのチャネルが選択されている間は そのチャネルのスピーチ信号レベル または 記憶されているレベルまたはゲイン補正量 に依存して再生音量を決定する機能を チャネルレベル補正機能とし、少なくとも上記、レベル判定機能とスピーチ検出機能とスピーチ判定機能を備えたことを特徴とする復調音響信号レベル判定方式。