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System and method for acquiring and playing multichannel audio based on I2S bus

A multi-channel, I2S technology, applied to instruments, electrical digital data processing, etc., can solve the problems of not specifically distinguishing between left and right channels, low sound quality requirements, and unusability

Inactive Publication Date: 2020-02-25
FUJIAN STAR NET WISDOM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PCM has modes such as long framsync and short frame sync, but it does not specifically distinguish the left and right channels, so it can transmit multiple channels of data in time-sharing; however, in the I2S bus, there is a level specially used to distinguish the left and right channels, so that To synchronize, the low level represents the left channel, and the high level represents the right channel, so only two channels of audio data can be transmitted, which cannot be used in such multi-channel, low-quality application scenarios

Method used

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  • System and method for acquiring and playing multichannel audio based on I2S bus
  • System and method for acquiring and playing multichannel audio based on I2S bus
  • System and method for acquiring and playing multichannel audio based on I2S bus

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Embodiment Construction

[0042] Please refer to figure 1 , the embodiment of this specification is a system for collecting and playing multi-channel audio based on the I2S bus, including:

[0043] an audio interface chip;

[0044] A CPU, the CPU and the audio interface chip are connected by an I2S bus; the audio interface chip is a DSP chip or an FPGA chip;

[0045] A plurality of audio codec chips, each of the audio codec chips is connected to the audio interface chip through an I2S bus or a PCM bus.

[0046] The I2S (Inter-IC Sound) bus, also known as the integrated circuit built-in audio bus, is a bus standard developed by Philips for audio data transmission between digital audio devices. This bus is specially used for data transmission between audio devices. , Widely used in various multimedia systems. In the I2S bus system, there is a level specially used to distinguish the left and right channels for synchronization. The low level represents the left channel, and the high level represents the...

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Abstract

The invention provides a system for collecting and playing multi-channel audio based on an I2S bus. The system comprises an audio interface chip; a CPU which is connected with the audio interface chipthrough an I2S (Inter-Integrated Circuit) bus; and a plurality of audio encoding and decoding chips, wherein each audio encoding and decoding chip is connected with the audio interface chip. The invention further provides a method for collecting and playing the multichannel audio based on the I2S bus, synthesis and decomposition of the multichannel audio data are achieved, the transmitted audio data are packaged again, and a chip only provided with the I2S bus supports transmission of the multichannel audio data.

Description

technical field [0001] The invention relates to the field of audio transmission, in particular to a system and method for collecting and playing multi-channel audio based on an I2S bus. Background technique [0002] The bus is an internal structure, which is a common channel for CPU, memory, input, and output devices to transmit information. In a communication device, it is often necessary to collect and play multiple channels of audio at the same time. [0003] In this application scenario, the PCM bus is often used for time-sharing transmission of multiple channels of data. PCM has modes such as long framsync and short frame sync, but it does not specifically distinguish the left and right channels, so it can transmit multiple channels of data in time-sharing; however, in the I2S bus, there is a level specially used to distinguish the left and right channels, so that To synchronize, the low level represents the left channel, and the high level represents the right channe...

Claims

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Application Information

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IPC IPC(8): G06F13/42
CPCG06F13/4291
Inventor 陈荣观郑一鸣林勇
Owner FUJIAN STAR NET WISDOM TECH CO LTD
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