摘要 |
An encoding system is disclosed, which includes an input terminal for receiving an input signal, a signal converting portion for converting the input signal into frequency-domain signals and grouping several frequency-domain signals into blocks, an analyzing portion for analyzing the input signal and the frequency-domain signals and obtaining an allowable error, a selecting portion for selecting one of a plurality of quantizing portions that quantizes frequency-domain signals of each block corresponding to the allowable error, a plurality of quantizing portions for quantizing frequency-domain signals corresponding to selection information and calculating amplitude information and codes, at least one pulse quantizing portion for encoding only part of the frequency domain signals, a multiplexing portion for multiplexing the amplitude information, codes, and selection information, and an output terminal for outputting the multiplexed signal.
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