Title:
【発明の名称】高品質オーディオ用短時間遅延変換コーダ、デコーダ、及びエンコーダ・デコーダ
Document Type and Number:
Japanese Patent JP2811369
Kind Code:
B2
Abstract:
An encoder applies a digital filterbank such as a transform or subband filterbank to an input signal to generate frequency subband information, encodes the resultant subband information using adaptive bit allocation to generate fixed-length values represented by fixed numbers of bits and variable-length values represented by variable numbers of bits, and formats the subband information into an encoded signal in which the fixed-length values are assembled into preestablished positions within the encoded signal. In response to an encoded signal including subband information represented by fixed-length values and variable-length values, a decoder extracts fixed-length values represented by fixed numbers of bits from preestablished positions within the encoded signal, extracts variable-length values represented by variable numbers of bits, wherein the variable numbers of bits are established in response to fixed-length values, and generates an output signal by applying an inverse filterbank to the extracted subband information.
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Inventors:
Filder, Luis Dunn
Davis, Mark Franklin
Davis, Mark Franklin
Application Number:
JP50371490A
Publication Date:
October 15, 1998
Filing Date:
January 29, 1990
Export Citation:
Assignee:
DOLBY LABORATORIES LICENSING CORPORATION
International Classes:
G05D11/13; G06T9/00; G10L19/02; H03M7/30; G11B20/10; H04B1/66; H04B14/00; H04B14/04; (IPC1-7): H03M7/30; G10L9/18; G11B20/10; H04B14/00
Domestic Patent References:
| JP2501507A | ||||
| JP2183468A |
Other References:
【文献】Speech Communtcation,Vol.6,1987,pp.299~308,A.W.Joknson,A.B.Bradley:”Adaptive Transform coding Incorporating Time Domain Aliasing Cancellation”
Attorney, Agent or Firm:
Yuzo Yamazaki (1 person outside)