05519807 is referenced by 6 patents and cites 11 patents.

An optimum excitation signal for each subframe is determined in a speech coder based on analysis-by-synthesis techniques and operating on frames of samples divided into a number of subframes. The excitation signal includes a shape contribution (innovation) and an amplitude contribution (gain) which are quantized separately. A circuit (IT) for gain quantization includes means (QU) for determining a gain index for each subframe; a comparison logic network (CFR) for detecting the maximum value taken by the gain index in the frame; and means for computing a normalized index for each subframe as a difference between the maximum index and the gain index relevant to that subframe. The coded signal includes the coded values of the maximum index and of the normalized indexes as information on the gain relevant to a frame.

Title
Method of and device for quantizing excitation gains in speech coders based on analysis-synthesis techniques
Application Number
8/135298
Publication Number
5519807
Application Date
October 12, 1993
Publication Date
May 21, 1996
Inventor
Daniele Sereno
Turin
IT
Luca Cellario
Turin
IT
Agent
Herbert Dubno
Assignee
SIP Societa Italiana per l Esercizio delle Telecomunicazioni p a
IT
IPC
G10L 9/14
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