Title:
デジタル信号をスケーラブルビットストリームにエンコードする方法、及びスケーラブルビットストリームをデコードする方法
Document Type and Number:
Japanese Patent JP2007509362
Kind Code:
A
Abstract:
A method for encoding a digital signal into a scalable bitstream comprising quantizing the digital signal, and encoding the quantized signal to form a core-layer bitstream, performing an error mapping based on the digital signal and the core-layer bitstream to remove information that has been encoded into the core-layer bitstream, resulting in an error signal, bit-plane coding the error signal based on perceptual information of the digital signal, resulting in an enhancement-layer bitstream, wherein the perceptual information of the digital signal is determined using a perceptual model, and multiplexing the core-layer bitstream and the enhancement-layer bitstream, thereby generating the scalable bitstream. A method for decoding a scalable bitstream into a digital signal comprising de-multiplexing the scalable bitstream into a core-layer bitstream and an enhancement-layer bitstream, decoding and de-quantizing the core-layer bitstream to generate a core-layer signal, bit-plane decoding the enhancement-layer bitstream based on perceptual information of the digital signal, and performing an error mapping based on the bit-plane decoded enhancement-layer bitstream and the de-quantized core-layer signal, resulting in an reconstructed transformed signal, wherein the reconstructed transformed signal is the digital signal.
Inventors:
Yu, Longchamp
Lin, Xiao
Lahaja, Susanto
Lin, Xiao
Lahaja, Susanto
Application Number:
JP2006532254A
Publication Date:
April 12, 2007
Filing Date:
October 06, 2004
Export Citation:
Assignee:
AGENCY FOR SCIENCE,TECHNOLOGY AND RESEARCH
International Classes:
G10L19/02; G10L19/14; H03M7/40; H04N7/26
Domestic Patent References:
| JPH11234139A | 1999-08-27 | |||
| JP2003058196A | 2003-02-28 | |||
| JP2003066998A | 2003-03-05 |
Foreign References:
| WO2003088212A1 | 2003-10-23 |
Attorney, Agent or Firm:
Tatsuo Egami
Satoshi Nakamura
Satoshi Nakamura