DECODING APPARATUS AND METHOD, AND PROGRAM
First Claim
1. A decoding apparatus comprising:
- a gain readout unit configured to read out encoded gain values at at least two gain sample positions of a time series signal;
an interpolation information readout unit configured to read out interpolation information indicating whether the gain value at each sample position of the time series signal is obtained through linear interpolation or obtained through non-linear interpolation; and
an interpolation processing unit configured to obtain the gain value at each sample position located between the two gain sample positions of the time series signal based on the gain values at the gain sample positions through linear interpolation or non-linear interpolation according to the interpolation information.
1 Assignment
0 Petitions
Accused Products
Abstract
The present technology relates to a decoding apparatus, a decoding method and a program which make it possible to obtain sound with higher quality.
A demultiplexing circuit demultiplexes an input code string into a gain code string and a signal code string. A signal decoding circuit decodes the signal code string to output a time series signal. A gain decoding circuit decodes the gain code string. That is, the gain decoding circuit reads out gain values and gain inclination values at predetermined gain sample positions of the time series signal and interpolation mode information. An interpolation processing unit obtains a gain value at each sample position between two gain sample positions through linear interpolation or non-linear interpolation according to the interpolation mode based on the gain values and the gain inclination values. A gain applying circuit adjusts a gain of the time series signal based on the gain values. The present technology can be applied to a decoding apparatus.
29 Citations
10 Claims
-
1. A decoding apparatus comprising:
-
a gain readout unit configured to read out encoded gain values at at least two gain sample positions of a time series signal; an interpolation information readout unit configured to read out interpolation information indicating whether the gain value at each sample position of the time series signal is obtained through linear interpolation or obtained through non-linear interpolation; and an interpolation processing unit configured to obtain the gain value at each sample position located between the two gain sample positions of the time series signal based on the gain values at the gain sample positions through linear interpolation or non-linear interpolation according to the interpolation information. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A decoding method comprising the steps of:
-
reading out encoded gain values at at least two gain sample positions of a time series signal; reading out interpolation information indicating whether the gain value at each sample position of the time series signal is obtained through linear interpolation or obtained through non-linear interpolation; and obtaining the gain value at each sample position located between the two gain sample positions of the time series signal based on the gain values at the gain sample positions through linear interpolation or non-linear interpolation according to the interpolation information.
-
-
7. A program causing a computer to execute processing including the steps of:
-
reading out encoded gain values at at least two gain sample positions of a time series signal; reading out interpolation information indicating whether the gain value at each sample position of the time series signal is obtained through linear interpolation or obtained through non-linear interpolation; and obtaining the gain value at each sample position located between the two gain sample positions of the time series signal based on the gain values at the gain sample positions through linear interpolation or non-linear interpolation according to the interpolation information.
-
-
8. A decoding apparatus comprising:
-
a gain readout unit configured to read out encoded gain values at at least two gain sample positions of a time series signal and gain inclination values indicating inclination of the gain values; an operation unit configured to obtain at the gain sample positions, straight lines having the gain values at the gain sample positions and having inclination indicated by the gain inclination values at the gain sample positions, and obtain differences between a gain value at an intersection of the straight lines obtained for the two gain sample positions and the gain values at the two gain sample positions; and an interpolation processing unit configured to obtain the gain value at each sample position located between the two gain sample positions of the time series signal through linear interpolation or non-linear interpolation according to the differences.
-
-
9. A decoding method comprising the steps of:
-
reading out encoded gain values at at least two gain sample positions of a time series signal and gain inclination values indicating inclination of the gain values; obtaining at the gain sample positions, straight lines having the gain values at the gain sample positions and having inclination indicated by the gain inclination values at the gain sample positions, and obtaining differences between a gain value at an intersection of the straight lines obtained for the two gain sample positions and the gain values at the two gain sample positions; and obtaining the gain value at each sample position located between the two gain sample positions of the time series signal through linear interpolation or non-linear interpolation according to the differences.
-
-
10. A program causing a computer to execute processing including the steps of:
-
reading out encoded gain values at at least two gain sample positions of a time series signal and gain inclination values indicating inclination of the gain values; obtaining at the gain sample positions, straight lines having the gain values at the gain sample positions and having inclination indicated by the gain inclination values at the gain sample positions and obtaining differences between a gain value at an intersection of the straight lines obtained for the two gain sample positions and the gain values at the two gain sample positions; and obtaining the gain value at each sample position located between the two gain sample positions of the time series signal through linear interpolation or non-linear interpolation according to the differences.
-
Specification