DIGITAL DECODER HAVING A SO-CALLED "PLAYBACK" MODE OF OPERATION AND COMPRISING TWO BUFFER MEMORIES

摘要

A digital decoder for television receiver, comprises an input (E) for receiving a digital audio/video signal (SAV), means for demodulating and decoding the input signal into an output signal intended for the television receiver, and a first buffer memory (8) into which the input signal is diverted after demodulation (SD) when the decoder is placed in a so-called “live” mode of operation. In a so-called “playback” mode of operation, the signal recorded in the first buffer memory constitutes the output signal. This decoder comprises a second buffer memory (9) into which the demodulated input signal (SD) is diverted when the decoder is placed in the “playback” mode, the signal recorded in the second buffer memory (9) constituting the output signal when the decoder is switched from the “playback” mode to another so-called “return to live” mode of operation. In the “return to live” mode, the user views at high speed the video portion recorded in the second buffer memory before the decoder switches back to the “live” mode.

主权项

1. A method implemented in a digital decoder for television receiver, wherein the method comprises:
receiving a digital signal; demodulating said received digital signal into an output signal for said television receiver; diverting said demodulated digital signal in a first buffer memory when said digital decoder is placed in a live mode of operation, said digital decoder having a replay mode of operation in which said diverted demodulated digital signal recorded in the first buffer memory constitutes said output signal; diverting said demodulated digital signal in a second buffer memory when said digital decoder is placed in said replay mode of operation, and eliminating selected components of said demodulated digital signal recorded in the second buffer memory so as to provide a temporally compressed version of the demodulated digital signal that constitutes said output signal when said decoder is switched from said replay mode of operation to a return to live mode of operation.