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    • 1. 发明授权
    • Audio-video signal transmission apparatus
    • 音视频信号传输装置
    • US6157625A
    • 2000-12-05
    • US987741
    • 1997-12-09
    • Takanobu Kondo
    • Takanobu Kondo
    • H04N7/12H04J3/00H04N7/08H04N7/081H04N7/173H04N7/24H04N7/52H04N21/2365H04J3/02
    • H04N21/23424H04N21/2368H04N21/6143
    • In transmitting an MPEG transport stream, each audio signal packet is placed after the corresponding video signal packet when audio and video transport streams are multiplexed. If simple switching were made to switch between a plurality of programs to form a multiplexed transport stream of the programs, part of the audio packets that are placed behind would be lost to cause abnormal sound. In the invention, switching between programs is made by providing signal switching means separately for audio transport streams and video transport streams. As a result, when the program to be transmitted is changed from one program to another, the signal switching means can be switched in such a manner that none of the audio signal packets that constitute those programs are lost.
    • 在传输MPEG传输流时,当音频和视频传输流被复用时,每个音频信号分组被放置在对应的视频信号分组之后。 如果进行简单切换以在多个节目之间切换以形成节目的复用传输流,则放置在后面的部分音频分组将丢失以引起异常声音。 在本发明中,通过分别为音频传输流和视频传输流提供信号切换装置来进行节目之间的切换。 结果,当要被发送的节目从一个节目改变到另一节目时,可以以这样一种方式来切换信号切换装置,使得构成这些节目的音频信号分组不会丢失。