Back to results
US 7,742,926 B2Granted
Digital audio signal compression method and apparatus
AssigneeRealNetworks, Inc.
InventorYuriy A. Reznik
Life of this patent
Estimating the term…
Abstract
Compression of audio signal data is described herein. In various embodiments, the compression of each unit of the audio signal data includes the employment of a distribution substantially representative of a subblock of residual data of the unit of audio signal data, to reduce the amount of data having to be transmitted to transmit the unit of audio signal data to a recipient.
Claims25
A computer-implemented method comprising:
- obtaining at the computer a block of residual data generated from applying a prediction filter to a block or a subblock of audio signal data;
- partitioning, by the computer, the block of residual data into a subblock of residual data, the subblock of residual data being smaller than said block of residual data;
- determining, by the computer, a distribution substantially representative of the subblock of residual data, wherein determining a distribution comprises determining a plurality of statistical measures, including at least two of:
- a mean of the subblock of residual data,
- a variance of the subblock of residual data,
- an estimate of the variance,
- a skewness of the distribution, and
- a kurtosis of the distribution;
- and
- transmitting, from the computer, in substance the unit of audio signal data to a recipient, utilizing the determined distribution to assist in reducing an amount of data having to be transmitted.
7 more elements
An encoder comprising:
- means for obtaining a block of residual data generated from application of a prediction filter to a block or a subblock of audio signal data;
- means for partitioning the block of residual data into a plurality of subblocks of residual data, each subblock of residual data being smaller than said block of residual data;
- and
- means for determining a distribution substantially representative of a subblock of residual data of an unit of audio signal data, wherein the means for determining is operable to determine a plurality of statistical measures, including at least two of:
- a mean of the subblock of residual data,
- a variance of the subblock of residual data,
- an estimate of the variance,
- a skewness of the distribution, and
- a kurtosis of the distribution.
6 more elements
A system comprising:
- a transmission unit;
- an encoder unit coupled to the transmission unit and operable to partition a block of residual data, generated from a block or a subblock of audio signal data, into a plurality of smaller subblocks of residual data;
- and
- a control unit coupled to, and operable to control the transmission unit and the encoder unit, including using the transmission unit to transmit in substance a subblock of residual data to a recipient, wherein the subblock of residual data is one of the plurality of smaller subblocks or residual data, and the encoder having been further operable to utilize a distribution substantially representative of the subblock of residual data to reduce an amount of data having to be transmitted by the transmission unit and wherein the encoder unit is further operable to determine a plurality of statistical measures, including at least two of:
- a mean of the subblock of residual data,
- a variance of the subblock of residual data,
- an estimate of the variance,
- a skewness of the distribution, and
- a kurtosis of the distribution.
6 more elements
Dependencies are inferred from the claim text.