Receiver, CPU and decoder for digital broadcast

A digital broadcast receiver comprising:

• a demultiplexer for separating a digital broadcast signal in which a compressed video signal, a compressed audio signal, and a data signal in associate with the compressed video and audio signals are multiplexed;
• a decoder buffer for storing the compressed video signal and the compressed audio signal separated by said demultiplexer;
• a video decoder for decoding said compressed video signal in said decoder buffer;
• a display for displaying a video signal decoded by said video decoder;
• an audio decoder for decoding said compressed audio signal in said decoder buffer;
• a speaker for outputting an audio signal decoded by said audio decoder;
• a memory for storing said data signal separated by said demultiplexer;
• and
• a CPU for analyzing the data signal stored in said memory;
• wherein said CPU allows the data signal analyzed by said CPU to be stored in said decoder buffer when the analyzed data signal includes a compressed video signal or a compressed audio signal and the compression method used for the compressed video signal or the compressed audio signal is the same as that used for said compressed video signal or said compressed audio signal multiplexed in the digital broadcast signal.

A decoder for use in receiving and processing a digital broadcast signal in which a compressed video signal, a compressed audio signal, and a data signal in association with the compressed video and audio signals are multiplexed, comprising:

• a decoder buffer for storing said compressed video signal and said compressed audio signal;
• a video decoder for decoding said compressed video signal in said decoder buffer;
• an audio decoder for decoding said compressed audio signal in said decoder buffer;
• and
• a CPU for analyzing said data signal,
• wherein said CPU allows the data signal analyzed by said CPU to be stored in said decoder buffer when the analyzed data signal includes a compressed video signal or a compressed audio signal and the compression method used for the compressed video signal or the compressed audio signal is the same as that used for said compressed video signal or said compressed audio signal multiplexed in the digital broadcast signal.

A digital broadcast receiver comprising:

• a demultiplexer configured to receive a digital broadcast signal and separate a compressed video signal, a compressed audio signal, and a data signal out of the received digital broadcast signal;
• a decoder buffer coupled to the demultiplexer to receive and store the compressed video signal and the compressed audio signal separated by the demultiplexer;
• a video decoder coupled to the decoder buffer to receive and decode the compressed video signal;
• an audio decoder coupled to the decoder buffer to receive and decode the compressed audio signal;
• a memory coupled to the demultiplexer to receive and store the data signal;
• and
• a CPU coupled to the memory to receive and analyze the data signal;
• wherein if the data signal includes a compressed video signal or a compressed audio signal that is compressed using the same compression method for the compressed video signal or the compressed audio signal separated out of the digital broadcast signal, the CPU causes the data signal to be stored in the decoder buffer to enable processing of the data signal by at least one of the decoders.