Signal processing device

A signal processing device and signal processor technology, applied in recording signal processing, wireless communication, information storage, etc., can solve problems such as noise generation, and achieve the effects of suppressing noise generation, suppressing interruption, and suppressing complexity

Inactive Publication Date: 2010-02-03
FUNAI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the radio receiver disclosed in Patent Document 1 has a problem that noise is generated when the operation clock of the audio DSP is changed
As in the case of the radio receiver disclosed in Patent Document 1, the magnetic disk recording / reproducing apparatus disclosed in Patent Document 2 has a problem in that noise is generated when the clock frequency for reproduction is changed

Method used

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  • Signal processing device
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Embodiment Construction

[0034] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the present invention is applied to an AV amplifier which is an example of a signal processing device.

[0035] figure 1 is a block diagram showing a general configuration of an AV amplifier according to one embodiment of the present invention. refer to figure 1 , the configuration of the AV amplifier 100 according to this embodiment will be described.

[0036] Such as figure 1 As shown, the AV amplifier 100 according to the embodiment of the present invention is connected to a DVD player 150 and a speaker 151 . The AV amplifier 100 receives a digital audio signal based on the S / PDIF (Sony / Philips Digital Interface) standard from the DVD player 150 . Also, the AV amplifier 100 converts the digital audio signal received from the DVD player 150 into an analog audio signal to output to the speaker 151 .

[0037] The AV ampl...

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Abstract

An AV amplifier (signal processing device) includes a DSP that performs predetermined processing on a digital audio signal inputted thereto, a D / A converter that converts the digital audio signal intoan analog audio signal, and a controller that sets a clock frequency of the DSP in accordance with a predetermined sampling frequency at the time of turn-on. Upon reception of a digital audio signalhaving a sampling frequency which is different from the clock frequency, the DSP adds a silent signal corresponding to a predetermined time to a head of the digital audio signal inputted thereto. Thesignal processing device can prevent generating noise when the setting of the signal processing device is changed, inhibit the interruption of the starting part of the sound and inhibit the complication of the circuit arrangement.

Description

technical field [0001] The present invention relates to a signal processing apparatus including a signal processor for performing predetermined processing on a digital audio signal input thereto. Background technique [0002] Conventionally, a radio receiver is known, which includes: an audio DSP (Digital Signal Processor) that performs predetermined processing on audio data input to the audio DSP; The audio data after predetermined processing is subjected to digital-to-analog conversion (see, for example, Patent Document 1). In such a radio receiver, the operation clock of the audio DSP is changed according to the sampling frequency of audio data to be input into the audio DSP. [0003] Conventionally, there is known a magnetic disk recording / reproducing apparatus in which the default frequency of a clock used for reproduction is set to 48 kHz (see, for example, Patent Document 2). In such a magnetic disk recording / reproducing apparatus, when the default frequency of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/06H04W40/18
CPCG11B20/1403G11B2220/65G11B20/10527G11B2020/00079G11B20/10222G11B2020/10546G11B20/10037
Inventor 吉冈信治
Owner FUNAI ELECTRIC CO LTD
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