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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

Active Publication Date: 2014-07-30
苏州顺芯半导体有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and device for realizing data preloading in a digital audio interface circuit, which introduces a data preloading circuit in a digital audio interface circuit, prepares data in advance, and allows all data to be clocked in bit clock (BCLK) Send bit by bit along the upper edge to solve the problem of timing imbalance, thereby improving the data transmission speed

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

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Embodiment Construction

[0037] The technical solutions in the preferred embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0038] Such as figure 1 As shown, the digital audio interface transmission circuit includes a clock module, a data transmission module, a shift register and a data preload unit, the clock module generates or processes a synchronous clock and a bit clock, and the data transmission module includes a parallel data left channel and a parallel Data right channel. Taking the synchronous clock as a reference, the data preloading control unit generates a preloading control signal to load the parallel left channel data or the parallel right channel data in the data sending module to the shift register when the data is about to be sent out, and the shift register is always carried out. Shifting, when the synchronous clock (LRCK) arrives, the first bit of data is shifted out on the ed...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C7/16
Inventor 张保华林坤淤清
Owner 苏州顺芯半导体有限公司
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