Audio data transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-10877512-B2
Application number	US-201916577786-A
Country	US
Kind code	B2
Filing date	Sep 20, 2019
Priority date	Apr 2, 2019
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

The present disclosure relates to an audio data transmission method and apparatus. The method includes: determining a frequency of sampling of audio data to be processed as a clock frequency of a first clock signal; determining a clock frequency of a second clock signal according to the clock frequency of the first clock signal, a number of slots of the audio data to be processed and a preset audio data occupied bit width; determining a duration of a high level in each cycle of the first clock signal according to the clock frequency of the second clock signal and the number of slots; and outputting the processed audio data according to a pulse code modulation (PCM) timing determined by the clock frequency of the first clock signal, the clock frequency of the second clock signal and the duration of the high level in each cycle of the first clock signal.

First claim

What is claimed is:

1. An audio data transmission method, applied to a sending device, the method comprising:
parsing input audio data to be processed, and obtaining, for the input audio data to be processed, a frequency of sampling, a number of slots and an original bit width of audio data of each slot;
determining the frequency of sampling as a clock frequency of a first clock signal;
determining a clock frequency of a second clock signal according to the clock frequency of the first clock signal, the number of slots and a preset bit width occupied by audio data;
determining a duration of a high level in each cycle of the first clock signal according to the clock frequency of the second clock signal and the number of slots; and
outputting processed audio data according to a pulse code modulation (PCM) timing determined by the clock frequency of the first clock signal, the clock frequency of the second clock signal and the duration of the high level in each cycle of the first clock signal.

2. The method of claim 1 , wherein outputting the processed audio data according to the PCM timing determined by the clock frequency of the first clock signal, the clock frequency of the second clock signal and the duration of the high level in each cycle of the first clock signal comprises:
outputting 1 bit of the processed audio data in each cycle of the second clock signal, and completing output of one frame of the processed audio data in each cycle of the first clock signal.

3. The method of claim 1 , further comprising:
performing data bit width conversion on the audio data having the original bit width for each slot in the input audio data to be processed according to a preset alignment manner and the preset bit width, and obtaining the processed audio data,
wherein the original bit width is less than or equal to the preset bit width.

4. The method of claim 3 , wherein performing the data bit width conversion on the audio data having the original bit width for each slot in the input audio data to be processed according to the preset alignment manner and the preset bit width and obtaining the processed audio data comprise:
converting the audio data having the original bit width in each slot into audio data having the preset bit width using a left-alignment manner,
wherein the audio data having the preset bit width sequentially comprises, from left to right, valid audio data having the original bit width and complementing data having a remaining bit width, the remaining bit width being equal to a difference between the preset bit width and the original bit width.

5. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor, cause the processor to perform the audio data transmission method of claim 1 .

6. The non-transitory computer-readable storage medium of claim 5 , wherein the instructions further cause the processor to output 1 bit of the processed audio data in each cycle of the second clock signal, and complete output of one frame of the processed audio data in each cycle of the first clock signal.

7. An audio data transmission method, applied to a receiving device, the method comprising:
receiving processed audio data, and determining a pulse code modulation (PCM) timing of the processed audio data, the PCM timing comprising a clock frequency of a first clock signal, a clock frequency of a second clock signal and a duration of a high level in each cycle of the first clock signal;
determining a frequency of sampling according to the clock frequency of the first clock signal;
determining a number of slots according to the clock frequency of the second clock signal and the duration of the high level in each cycle of the first clock signal; and
obtaining audio data having a preset bit width occupied by audio data for each slot from the processed audio data according to the number of slots and the preset bit width.

8. The method of claim 7 , wherein receiving the processed audio data and determining the PCM timing of the processed audio data comprise:
receiving 1 bit of the processed audio data in each cycle of the second clock signal, and completing reception of one frame of the processed audio data in each cycle of the first clock signal.

9. The method of claim 7 , wherein obtaining the audio data having the preset bit width for each slot from the processed audio data according to the number of slots and the preset bit width comprises:
acquiring valid audio data having an original bit width from the audio data having the preset bit width for each slot according to a preset alignment manner.

10. The method of claim 9 , wherein the preset alignment manner comprises a left-alignment manner,
wherein the audio data having the preset bit width sequentially comprises, from left to right, the valid audio data having the original bit width and complementing data having a remaining bit width, the remaining bit width being equal to a difference between the preset bit width and the original bit width.

11. An audio data transmission apparatus, applied to the receiving device, the apparatus comprising:
a processor; and
a memory configured to store instructions executable by the processor,
wherein the processor is configured to perform operations of the audio data transmission method according to claim 7 .

12. The apparatus of claim 11 , wherein receiving the processed audio data and determining the PCM timing of the processed audio data comprise:
receiving 1 bit of the processed audio data in each cycle of the second clock signal, and completing reception of one frame of the processed audio data in each cycle of the first clock signal.

13. The apparatus of claim 11 , wherein obtaining the audio data having the preset bit width for each slot from the processed audio data according to the number of slots and the preset bit width comprises:
acquiring valid audio data having an original bit width from the audio data having the preset bit width for each slot according to a preset alignment manner.

14. The apparatus of claim 13 , wherein the preset alignment manner comprises a left-alignment manner,
wherein the audio data having the preset bit width sequentially comprises, from left to right, the valid audio data having the original bit width and complementing data having a remaining bit width, the remaining bit width being equal to a difference between the preset bit width and the original bit width.

15. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor, cause the processor to perform the audio data transmission method of claim 7 .

16. The non-transitory computer-readable storage medium of claim 15 , wherein the instructions further cause the processor to receive 1 bit of the processed audio data in each cycle of the second clock signal, and complete reception of one frame of the processed audio data in each cycle of the first clock signal.

17. An audio data transmission apparatus, applied to a sending device, the apparatus comprising:
a processor; and
a memory configured to store instructions executable by the processor,
wherein the processor is configured to:
parse input audio data to be processed, and obtain, for the input audio data to be processed, a frequency of sampling, a number of slots and an original bit width of audio data of each slot;
determine the frequency of sampling as a clock frequency of a first clock signal;
determine a clock frequency of a second clock signal according to the clock frequency of the first clock si

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Jin Tao

Classifications

• H04B14/04 Primary

  using pulse code modulation · CPC title

• G10L19/113

  Regular pulse excitation · CPC title

• G10L19/00

  Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (in musical instruments G10H) · CPC title

• H04B14/026

  using pulse time characteristics modulation, e.g. width, position, interval · CPC title

• H04L7/0087

  Preprocessing of received signal for synchronisation, e.g. by code conversion, pulse generation or edge detection · CPC title