Sound encoder and sound decoder

Title: Sound encoder and sound decoder

Brief Patent Description - Full Patent Description - Patent Claims

The Patent Description & Claims data below is from USPTO Patent Application 20080281603, Sound encoder and sound decoder.

1. A sound encoder comprising: an encoding unit for producing an amplitude envelope as an intermediate value, the amplitude envelope including a plurality of elements, and for encoding a sound signal on a frame-by-frame basis so as to produce a plurality of codes, part of all of which are variable length codes, the plurality of codes including main codes and an auxiliary code, the auxiliary code being produced based on the amplitude envelope; a multiplexing order determination unit for analyzing the amplitude envelope produced by said encoding unit to obtain an order of the value corresponding to the elements of the amplitude envelope, so as to determine an order in which the main codes are to be multiplexed; and a multiplexing unit for multiplexing the main codes in the order determined by said multiplexing order determination unit and multiplexing the auxiliary code in a same fixed order for each frame.

2. A sound encoding method comprising: an encoding step for producing an amplitude envelope as an intermediate value, the amplitude envelope including a plurality of elements, and for encoding a sound signal on a frame-by-frame basis so as to produce a plurality of codes, part or all of which are variable length codes, the plurality of codes including main codes and an auxiliary code, the auxiliary code being produced based on an amplitude envelope; a multiplexing order determination step for analyzing the amplitude envelope produced by said encoding unit to obtain an order of the value corresponding to the elements of the amplitude envelope, so as to determine an order in which the main codes are to be multiplexed; and a multiplexing step for multiplexing the main codes in the order determined by said multiplexing order determination step and multiplexing the auxiliary code in a same fixed order for each frame.

Brief Patent Description - Full Patent Description - Patent Claims

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Previous Patent Application:
Method and apparatus to encode and decode an audio signal
Next Patent Application:
Consultants - instrumentation loop logic diagrams
Industry Class:
Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression

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