16-05-2013 дата публикации
Номер: US20130124199A1
In a pulse encoding and decoding method and a pulse codec, more than two tracks are jointly encoded, so that free codebook space in the situation of single track encoding can be combined during joint encoding to become code bits that may be saved. Furthermore, a pulse that is on each track and required to be encoded is combined according to positions, and the number of positions having pulses, distribution of the positions that have pulses on the track, and the number of pulses on each position that has a pulse are encoded separately, so as to avoid separate encoding performed on multiple pulses of a same position, thereby further saving code bits. 1. A pulse encoding method , comprising:obtaining pulses that are on T tracks and required to be encoded, wherein T is an integer greater than or equal to 2;{'sub': 't', 'sup': 'th', 'separately collecting, according to positions, statistics about a pulse that is on each track and required to be encoded, to obtain the number Nof positions that have pulses on each track, distribution of the positions that have pulses on the track, and the number of pulses on each position that has a pulse, wherein the subscript t represents a ttrack, and tε[0, T−1];'}{'sub': 0', '1', 'T-1, 'b': 1', '1, 'according to the number {N, N, . . . , N} of positions that have pulses and are on each track, determining a first index I, wherein the first index I corresponds to all possible distribution situations of positions that have pulses and are on each track under the number of the positions having pulses, wherein the number of the positions having pulses is represented by it;'}{'b': 2', '1, 'sub': 't', 'determining a second index Iof each track separately according to distribution of positions that have pulses and are on each track, wherein the second index indicates, among all possible distribution situations corresponding to the first index I, a distribution situation which corresponds to distribution of current positions having pulses on a ...
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