Digital audio frequency controller
A technology for digital audio and control devices, applied in speech analysis, instruments, etc., can solve the problem of not supporting parallel processing of audio signals, and achieve the effects of avoiding static power consumption, providing parallel data processing capabilities, and reducing power consumption
Inactive Publication Date: 2009-08-26
VIMICRO CORP
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Problems solved by technology
[0015] In addition, the digital audio control device 100 can only handle one audio input and output
It can be seen that the existing digital audio control device does not support parallel processing of audio signals
Method used
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[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.
[0051] The present invention provides a digital audio control device. The control unit in the digital audio control device controls the codec unit to start working when it is powered on or to stop working when it is powered off according to the state information received from the outside. When the codec unit is powered on, it outputs the generated bit clock to the control unit, and the control unit uses the bit clock to provide the working clock for the digital audio processing unit; when the power is not working, the bit clock disappears, and the bit clock works The digital audio processing unit of the digital audio control device also stops working, avoiding the static power consumption generated by the digital audio control device when there is n...
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The invention discloses a digital acoustical frequency control device, which comprises the following steps: outputting the control signal to the encoding and decoding unit according to the received external state information by the control unit in the device and outputting the received bit clock of the encoding and decoding unit to the digital acoustical frequency processing unit; dealing with and outputting the input analog acoustical frequency signal and serial digital acoustical frequency signal separately according to the received control signal by the encoding and decoding unit, outputting the bit clock to the control unit or stopping dealing with and outputting the input analog acoustical frequency signal and serial digital acoustical frequency signal separately. The invention reduces the quiescent dissipation and dynamic dissipation of the digital acoustical control device, which avoids the synchronous problem of asynchronous clock domain signal, reduces the complicated degree of the hardware designation, and increases the processing capacity of parallel acoustical frequency.
Description
technical field [0001] The invention relates to audio processing technology, in particular to a low-power consumption digital audio control device. Background technique [0002] In modern multimedia system design, digital audio control devices are widely used. figure 1 It is a schematic diagram of the structure of a commonly used digital audio control device, such as figure 1 As shown, the digital audio control device 100 is connected to a personal computer (PC, Personal Computer) 140 through a universal serial bus (USB, Universal Serial Bus) interface module 130, and the analog audio signal is processed by the digital audio control device 100 through the USB interface. The module 130 outputs to the PC 140; correspondingly, the digital audio signal output by the PC 140 can also be output to the digital audio control device 100 through the USB interface module 130, and the analog audio signal is output after processing. [0003] Specifically, the digital audio control devic...
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IPC IPC(8): G10L21/00
Inventor 曹弋温小勇张倩高晓宇
Owner VIMICRO CORP