Title:
ENCODER, DECODER AND METHODS THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/052221
Kind Code:
A1
Abstract:
An encoder, a decoder and methods thereof whereby the bit efficiency of encoding can be improved, thereby improving the qualities of signals as decoded. In the encoder: a time-frequency converting unit (101) converts signals, which are to be encoded, to frequency domain signals; an adaptive spectrum formation encoding unit (102) determines an effective range in the frequency band of the frequency domain signals; and a pulse vector encoding unit (103) pulse vector encodes only the signal components within the effective range. In the decoder: a pulse vector decoding unit (106) pulse vector decodes the pulse encoded parameters as encoded by the foregoing encoder; an adaptive spectrum formation decoding unit (107) sets the decoded signals, which have been obtained by the pulse vector decoding unit (106), to the band corresponding to the information of the effective range; and a frequency-time converting unit (108) converts the decoded signals, which have been set to the band corresponding to the information of the effective range, to time domain signals.
Inventors:
LIU, Zongxian (())
リウゾンシアン (())
リウゾンシアン (())
Application Number:
JP2010/006394
Publication Date:
May 05, 2011
Filing Date:
October 29, 2010
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
LIU, Zongxian (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
LIU, Zongxian (())
International Classes:
G10L19/02; G10L19/10
Attorney, Agent or Firm:
WASHIDA, Kimihito (5th Floor, Shintoshicenter Bldg. 24-1, Tsurumaki 1-chome, Tama-sh, Tokyo 34, 〒2060034, JP)