Video audio multiplex system

TLDR: In this article, a bit assignment signal was generated from the transmission controller by the audio data generator to improve the quality of video image by assigning the transmission ratio of video and audio data according to the presence of audio data.

Abstract: PURPOSE:To improve the quality of video image by assigning the transmission ratio of video and audio data in response to the presence of audio data. CONSTITUTION:An audio data generating section 2 detects the presence of the audio data, a transmission controller 3 sends a coded clock to a video data generating section 1 and an audio data generating section 2 depending on the data and a multiplex section 4 uses a multiplex control clock from the transmission controller 3 so as to multiplex the video data and the audio data. Then a bit assignment signal BAS generated from the transmission controller 3 is changed corresponding to the presence of the audio data and the changed signal is multiplexed by a multiplex section 5 and the resulting signal is sent to a receiver side. The receiver side varies the decoded clock of the video output generating section 10 and the audio output generating section 11 to decode the video data and the audio data. Thus, only the video information is sent in the absence of the audio data to improve the video quality.