Title:
音声符号化方法及び音声復号方法
Document Type and Number:
Japanese Patent JP4831123
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To transmit voice data improved in compressibility by predictive coding of a multi-channel voice signal.SOLUTION: An adding circuit 1a computes a sum signal (L+R) of stereo 2 channels L and R, and a subtracting circuit 1b computes a difference signal (L-R). Differential computing circuits 11D1 and 11D2 compute differences Δ(L+R) and Δ(L-R) of this time and the previous time. Predictive coding circuits (15D1, 15D2, 16D1 and 16D2) compute a plurality of predictive values of the differences Δ(L+R) and Δ(L-R), compute each predictive residue of the plurality of predictive values and the differences Δ(L+R) and Δ(L-R), select a minimum predictive residue to make predictive coding data into a packet, and then transmit the data through a prescribed communication line.
Inventors:
Norihiko Fuchigami
Shoji Ueno
Miaki Tanaka
Shoji Ueno
Miaki Tanaka
Application Number:
JP2008129289A
Publication Date:
December 07, 2011
Filing Date:
May 16, 2008
Export Citation:
Assignee:
Victor Company of Japan, Ltd.
International Classes:
G10L19/00; G10L19/008
Domestic Patent References:
| JP6133252A | ||||
| JP10064199A | ||||
| JP64044499A | ||||
| JP62003535A |
Other References:
渕上徳彦 他,"ロスレスオーディオ符号化方式の検討",AES東京コンベンション '97予稿集,1997年 6月25日,p.30-33