Scalable audio encoding/decoding method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 19, 2002
Grant Date -
N/A
app pub date -
May 28, 1998
filing date -
Nov 20, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A scalable audio encoding/decoding method and apparatus are provided. To code an audio signal into layered data streams having a base layer and at least one enhancement layer, the encoding method includes the steps of time/frequency mapping input audio signals and quantizing the spectral data with the same scale factor for each predetermined scalefactor band, and packing the quantized data into bit streams, wherein the bit stream generating step comprises the steps of coding the quantized data corresponding to the base layer, coding the quantized data corresponding to the next enhancement layer of the coded base layer and the remaining quantized data uncoded by a limit in a layer size and belonging to the coded layer, and performing the layer coding step for all enhancement layers to form bit streams. In the base layer coding step, the enhancement layer coding step and the sequential coding step, arithmetic coding is performed using a predetermined probability model in the order of bit sequences from the most significant bit sequence to the least significant bit sequence by representing the side information and quantized data corresponding to a layer to be coded in a predetermined number of bits. The side information contains scale factors and probability model information to be used in arithmetic coding.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully