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 (SO) when the decoder is placed in a so-called “live” mode of operation. In a so-called “replay” 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 (SO) is diverted when the decoder is placed in the “replay” mode, the signal recorded in the second buffer memory (9) constituting the output signal when the decoder is switched from the “replay” 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. Digital decoder for television receiver, comprising an input for receiving a digital audio/video signal, a means for demodulating and decoding an input audio/video signal into an output signal for the television receiver, and a first buffer memory into which the input signal is diverted after demodulation when the decoder is placed in a “live” mode of operation, the decoder having a replay mode of operation in which the signal recorded in the first buffer memory constitutes the output signal from the decoder, said decoder further comprises a second buffer memory into which the input signal is diverted after demodulation while the decoder is placed in the replay mode, and the signal recorded in the second buffer memory being processed to eliminate selected components of the demodulated input signal so as to provide a temporally compressed version of the input signal and constituting the output signal when the decoder is switched from the replay mode to a “return to live” mode of operation.