Coding method, decoding method, coder, and decoder

• US 10,666,287 B2
• Filed: 09/11/2019
• Issued: 05/26/2020
• Est. Priority Date: 04/29/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Ma, Fuwei, Zhang, Dejun
• Primary Examiner(s): Mai, Lam T
• Application Number:
  US16/568,144
• Publication Number:
  US 20200007153A1
• Time in Patent Office: 258 Days
• Field of Search: 341 51- 70
• CPC Class Codes: G10L 19/08 Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
• CPC Class Codes: G10L 19/10 the excitation function being a multipulse excitation
• CPC Class Codes: H03M 7/3082 Vector coding for television signals, see H04N19/94

Abstract

A coding method, a decoding method, a coder, and a decoder, where the coding method includes obtaining the pulse distribution, on a track, of the pulses to be encoded on the track, determining a distribution identifier for identifying the pulse distribution according to the pulse distribution, and generating a coding index that includes the distribution identifier. The decoding method includes receiving a coding index, obtaining a distribution identifier from the coding index, wherein the distribution identifier is configured to identify the pulse distribution, on a track, of the pulses to be encoded on the track, determining the pulse distribution, on a track, of all the pulses to be encoded on the track according to the distribution identifier, and reconstructing the pulse order on the track according to the pulse distribution.

Claims

1. A coder for coding an audio signal sample, comprising:

a memory comprising instructions; and

a processor coupled to the memory, the instructions causing the processor to be configured to;

obtain a quantity of pulse positions (N) of a plurality of pulses, a vector P(N)={p(0), p(1), . . . , and p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determine a first index according to the N pulse positions;

determine a second index using the following permutation formula;

2. The coder of claim 1, wherein the instructions further cause the processor to be configured to:

obtain pulse sign information indicating positive and negative features of the pulses; and

determine a pulse sign index corresponding to the pulse sign information, and the coding index further comprising the pulse sign index corresponding to the pulse sign information for each pulse.

3. The coder of claim 1, wherein the instructions further cause the processor to be configured to:

overlay information about the second and third indices with the first index used as a first value, a value of the first index corresponding to an independent value range of the coding index, using, in the overlaid information, a combination of the second index and the third index according to I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing a total quantity of all possible distributions of the pulse positions on the track.

4. A method for coding of an audio signal sample, comprising:

obtaining, by a coder, a quantity of pulse positions (N) of a plurality of pulses, a vector P(N)={p(0), p(1), . . . , p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determining, by the coder, a first index from a lookup table according to the N pulse positions,

determining, by the coder, a second index using the following permutation formula;

5. The method of claim 4, further comprising:

obtaining, by the coder, pulse sign information indicating positive and negative features of each pulse; and

determining, by the coder, a pulse sign index corresponding to the pulse sign information, and the combined index further comprising the pulse sign index corresponding to each pulse.

6. The method of claim 5, further comprising:

overlaying, by the coder, information about the second and third indices with the first index used as a start value, a value of the first index corresponding to an independent value range of the combined index using, in the overlaid information, by the coder, a combination of the second index and the third index according to the following equation;

I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing the total quantity of all possible distributions of the pulse positions on the track.

7. A computer program product comprising a non-transitory computer readable storage medium storing program code thereon for coding of an audio signal sample, the program code comprising instructions for executing a method that comprises:

obtaining a quantity of pulse positions (N) of a plurality of pulses, a vector P(N)={p(0), p(1), . . . , p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determining a first index from a lookup table according to the N pulse positions,

determining a second index using the following permutation formula;

8. The computer program product of claim 7, wherein the method further comprises:

obtaining pulse sign information indicating positive and negative features of each pulse; and

determining a pulse sign index corresponding to the pulse sign information, and the combined index further comprising the pulse sign index corresponding to each pulse.

9. The computer program product of claim 8, wherein the method further comprises:

overlaying information about the second and third indices with the first index used as a start value, a value of the first index corresponding to an independent value range of the combined index, using, in the overlaid information, a combination of the second index and the third index according to the following equation;

I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing the total quantity of all possible distributions of the pulse positions on the track.

10. A coder for coding an audio signal sample, comprising:

a memory comprising instructions; and

a processor coupled to the memory, the instructions causing the processor to be configured to;

obtain a quantity of pulse positions (N) of a plurality of pulses, a vector P(N)={p(0), p(1), . . . , and p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determine a first index according to the N pulse positions;

determine a second index based on the distribution of the pulse positions on the track by referring to a lookup table which includes the second index calculated by using the following permutation formula;

11. The coder of claim 10, wherein the instructions further cause the processor to be configured to:

obtain pulse sign information indicating positive and negative features of the pulses; and

determine a pulse sign index corresponding to the pulse sign information, and the coding index further comprising the pulse sign index corresponding to the pulse sign information for each pulse.

12. The coder of claim 10, wherein the instructions further cause the processor to be configured to:

overlay information about the second and third indices with the first index used as a start value, a value of the first index corresponding to an independent value range of the coding index, using, in the overlaid information, a combination of the second index and the third index according to I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing a total quantity of all possible distributions of the pulse positions on the track.

13. A method for coding of an audio signal sample, comprising:

obtaining, by a coder, a quantity of pulse positions (N) of a plurality of pulses, and a vector P(N)={p(0), p(1), . . . , p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determining, by the coder, a first index from a lookup table according to the N pulse positions,

determining, by the coder, a second index based on the distribution of the pulse positions on the track by referring to a lookup table which includes the second index calculated by using the following permutation formula;

14. The method of claim 13, further comprising:

obtaining, by the coder, pulse sign information indicating positive and negative features of each pulse; and

determining, by the coder, a pulse sign index corresponding to the pulse sign information, and the combined index further comprising the pulse sign index corresponding to each pulse.

15. The method of claim 14, further comprising:

overlaying, by the coder, information about the second and third indices with the first index used as a start value, a value of the first index corresponding to an independent value range of the combined index, using, in the overlaid information, by the coder, a combination of the second index and the third index according to the following equation;

I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing the total quantity of all possible distributions of the pulse positions on the track.

16. A computer program product comprising a non-transitory computer readable storage medium storing program code thereon for coding of an audio signal sample, the program code comprising instructions for executing a method that comprises:

obtaining a quantity of pulse positions (N) of a plurality of pulses, a vector P(N)={p(0), p(1), . . . , p(N−

1)} indicating a distribution of the pulse positions on a track, and a quantity of the pulses in each of the pulse positions;

determining a first index from a lookup table according to the N pulse positions,

determining a second index based on the distribution of the pulse positions on the track by referring to a lookup table which includes the second index calculated by using the following permutation formula;

17. The computer program product of claim 16, wherein the method further comprises:

obtaining pulse sign information indicating positive and negative features of each pulse; and

determining a pulse sign index corresponding to the pulse sign information, and the combined index further comprising the pulse sign index corresponding to each pulse.

18. The computer program product of claim 17, wherein the method further comprises:

overlaying information about the second and third indices with the first index used as a start value, a value of the first index corresponding to an independent value range of the combined index, using, in the overlaid information, a combination of the second index and the third index according to the following equation;

I3×

W(N)+I2, the I2 representing the second index, the I3 representing the third index, and the W(N) representing the total quantity of all possible distributions of the pulse positions on the track.