| 摘要 |
PROBLEM TO BE SOLVED: To maintain the internal state matching of an encoder in switching from TFO mode to tandem connection while suppressing the corresponding increase in the amount of processing. SOLUTION: In the TFO mode, PCM data and compressed data transmitted in multiplexed form are demultiplexed by a PCM data/compressed data demultiplexing unit 50, and the compressed data is selected by a selector 54 for output. At the same time, an encoding functional unit 52 continues to encode the demultiplexed PCM data so that the internal state matching of the encoder can be maintained in case of switching to the tandem connection. At this time, to reduce the processing load of the encoder, part of the demultiplexed encoded data, for example, stochastic codebook data, is extracted and supplied to the encoding functional unit. COPYRIGHT: (C)2004,JPO
|
