Speech coding apparatus and speech decoding apparatus each...

Details Speech coding apparatus and speech decoding apparatus each... Speech coding apparatus and speech decoding apparatus each...

2007-10-15

2010-06-01

Smits, Talivaldis Ivars (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S223000

Reexamination Certificate

active

07729905

ABSTRACT:
A speech coding apparatus includes a base layer coder that codes an input signal and generates first coded information. A base layer decoder decodes the first coded information and generates a first decoded signal. The base layer decoder also generates long term prediction information comprising information representing long term correlation of speech or sound. An adder obtains a residual signal representing a difference between the input signal and the first decoded signal. An enhancement layer coder calculates a long term prediction coefficient using the residual signal obtained in the adder and a long term prediction signal fetched from a previous long term prediction signal sequence based on the long term prediction information. The enhancement layer coder further codes the long term prediction coefficient and generates second coded information.

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