Method of incorporating a variable rate auxiliary data...

Details Method of incorporating a variable rate auxiliary data... Method of incorporating a variable rate auxiliary data...

H - Electricity

04

N

H04N 7/08 (2006.01) H04N 7/015 (2006.01) H04N 7/50 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2150729

A method of incorporating an auxiliary signal with an input video signal includes the step of encoding the input video signal to generate a variable bit rate encoded signal having a selected level of distortion. The video signal is applied to a buffer. The level of distortion is selected as a function of the fullness of the buffer. The video signal is read from the buffer and applied to a transmission channel at a predetermined video output rate. Portions of an auxiliary signal are applied to the channel at times when the buffer is in an underflow condition. The selected level of distortion has a flow which corresponds to a predetermined, non-zero level of perceptual distortion in the video signal.

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