CN1205603C

5G,4G,3G,2G

Title

Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals

Application Number:

CN2001803954

Publication Date:

08-06-2005

Current Assignee:

VOICEAGE CORPORATION

Family ID:

4167763

Application Date:

22-11-2001

Declaring Company:

Publication Country:

US

Priority Date:

22-11-2000

View on Espacenet goto-link

Title

Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals

Application Number:

CN2001803954

Family ID:

4167763

Publication Country:

US

Publication Date:

08-06-2005

Application Date:

22-11-2001

Priority Date:

22-11-2000

Current Assignee:

VOICEAGE CORPORATION

Declaring Company:

View on Espacenet goto-link

Abstract  Abstract

An indexing method comprises forming a set of pulse position trace trace set constraint according to a pulse position codebook combination of non-zero amplitude pulse position and corresponding position index in the codebook at least trace of each non-zero amplitude pulse the amplitude of the pulse and the corresponding trace in pulse position. For index one and two non-zero-amplitude pulse of the position respectively using process code 1 and code 2 pulse. when X of non-zero-amplitude pulse position in one track X is more than or equal to 3 the process of using code 1 and code 2 pulse counts the sub-index pulse and calculating the global index by combining these sub-index.

The indexing method comprises forming a set of tracks of pulse positions restraining the positions of the non-zero-amplitude pulses of the combinations of the codebook in accordance with the set of tracks of pulse positions and indexing in the codebook each non-zero-amplitude pulse of the combinations at least in relation to the position of the in the corresponding track the amplitude of the pulse and the number of pulse positions in said corresponding track. For indexing the position(s) of one and two non-zero amplitude pulse(s) in one track procedures code_1 pulse and code_2 pulse are respectively used. When the positions of a number X of non-zero-amplitude pulses are located in one track X>/= 3 subindices of these X pulses are calculated using the procedures code_1 pulse and code_2 pulse and a global index is calculated by combining these subindices.

The indexing method comprises forming a set of tracks of pulse positions restraining the positions of the non-zero-amplitude pulses of the combinations of the codebook in accordance with the set of tracks of pulse positions and indexing in the codebook each non-zero-amplitude pulse of the combinations at least in relation to the position of the in the corresponding track the amplitude of the pulse and the number of pulse positions in said corresponding track. For indexing the position(s) of one and two non-zero amplitude pulse(s) in one track procedures code_1 pulse and code_2 pulse are respectively used. When the positions of a number X of non-zero-amplitude pulses are located in one track X? 3 subindices of these X pulses are calculated using the procedures code_1 pulse and code_2 pulse and a global index is calculated by combining these subindices.

Note:

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