Method and device for realizing data preloading in transmission circuit of digital audio interface

A digital audio and transmission circuit technology, applied in the field of digital audio interface transmission circuit, can solve problems such as timing imbalance, achieve the effect of increasing transmission rate, improving timing characteristics, and reducing area
CN102522110BActive Publication Date: 2014-07-30苏州顺芯半导体有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
苏州顺芯半导体有限公司
Publication Date
2014-07-30

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Abstract

The invention discloses a method and device for realizing data preloading in a transmission circuit of a digital audio interface. According to the method and the device for realizing data preloading in the transmission circuit of the digital audio interface, a data preloading control module is in charge of the advance preparation of data by arranging a detecting counter, an auxiliary counter and the data preloading control module in a transmission circuit of a digital audio interface through referring to the counting value of the detecting counter or the auxiliary counter, the counting value of a moment transmitting first data is also judged according to a digital audio interface protocol, and a period before the data are transmitted is determined according to the counting value and is just a moment for preparing the data; and when a synchronous clock (LRCK) arrives, the first data are shifted out on the edge of a bit clock (BCLK), and then other data are also shifted out on the edge of the bit clock bit by bit. According to such a data preloading method, the time delay brought because of logical judgment is decreased, the data transmission rate is enhanced, and the time-sequence characteristic of a circuit is structurally improved.
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Description

technical field

[0001] The invention relates to the field of digital audio interface sending circuits, in particular to a method and device for improving data transmission speed by preloading data in the digital audio interface sending circuit. Background technique

[0002] The digital audio interface converts the analog audio data into a digital data stream through the analog-to-digital conversion of the recording device, and sends it to the system through a specific protocol, or the system sends the digital data stream to the playback device through a specific protocol, and then The original audio is played by the playback device through digital-to-analog conversion.

[0003] Digital audio interfaces have different transmission rates depending on the sampling rate and quantization precision of the audio data. The most common sampling rates are 8KHz, 44.1KHz, 48KHz, 96KHz, etc., and the data precision may also be 16, 18, 20, 24, 32 bits, etc. The higher the quality of the...

Claims

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