Frame format for video codec

Details Frame format for video codec Frame format for video codec

H - Electricity

04

M

344/25, 350/33,

H04M 11/06 (2006.01) H04J 3/07 (2006.01) H04J 3/16 (2006.01) H04N 7/54 (2006.01)

Patent

CA 1325673

- 12 - ABSTRACT OF THE DISCLOSURE A frame format for a video codec combines video data at a video subcarrier frequency with up to five data channels at a DS1 digital telecommunications data rate and an optional audio/telephone channel. Video data is sampled and input to a stuff FIFO at the subcarrier frequency rate and output to a multiplexer at a DS3 digital telecommunications data rate. A stuff word is generated for each DS3 data subframe and contains either a valid data bit or a garbage data bit, as indicated by a stuff flag contained in the stuff word, to compensate for the difference in input and output data rates from the stuff FIFO. The DS3 master frame generated by a multiplexer from the video data and the other data channels is transmitted and decoded at the receiving end in a reverse manner.

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