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Data reproducer

A technology for data reproduction and digital data, applied in data recording, collaborative operation devices, digital recording/reproducing, etc., can solve the problems of shortened battery life and power consumption of the player's power supply, reduce useless power consumption, suppress battery life, etc. The effect of shortening the lifespan

Inactive Publication Date: 2004-05-12
SANYO ELECTRIC CO LTD
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  • Abstract
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Problems solved by technology

[0004] However, in existing portable audio players, since signal processing is always performed at a constant high frequency regardless of the bit rate of audio data, there is no need to perform signal processing at such a high frequency. Useless power is consumed when audio data is reproduced, and there is a problem of shortening the battery life of the player's power supply due to the useless power consumption.

Method used

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  • Data reproducer
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Embodiment Construction

[0028] Hereinafter, the present invention will be shown in detail along the accompanying drawings. figure 1 The form implemented in the portable audio player.

[0029] figure 1 The portable audio player of this embodiment shown in can be loaded with a memory card (1), and the digital audio data recorded in the memory card (1) is regenerated by a reproduction circuit (2), and the regenerated digital audio data is regenerated by a microcomputer. (3) is supplied to a DSP (Digital Signal Processor) (4). The digital audio data supplied to the DSP (4) is subjected to predetermined signal processing by the DSP (4), and then input to a D / A conversion circuit (5) to be converted into an analog audio signal. The analog sound signal is input to the amplifying circuit (6) to be amplified, then input to the earphone (not shown) connected to the terminal from the earphone output terminal (5), and output as sound from the speaker of the earphone to the outside.

[0030] Above-mentioned re...

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Abstract

The present invention provides an audio player comprising a memory card 1, reproduction circuit 2, microcomputer 3, DSP 4, and headphone output terminal 7. The microcomputer 3 extracts bit rate information from audio data in reproduction of audio data. Every time the microcomputer extracts the bit rate information, the microcomputer feeds a frequency control signal to the DSP 4 corresponding to the bit rate information. The DSP 4 performs a specified signal processing at a frequency corresponding to the frequency control signal fed from the microcomputer 3. This suppresses the shortening of a cell life due to useless power consumption.

Description

technical field [0001] The present invention relates to a data reproducing device for reproducing digital data recorded in a memory, performing predetermined signal processing on the digital data, and outputting the digital data. Background technique [0002] In recent years, portable audio players capable of reproducing digital audio data recorded in memories such as memory cards and flash memories have become widespread. [0003] In this portable audio player, as the operating frequency, among the audio data to be reproduced, a large numerical value that can reproduce the audio data with the highest bit rate (the number of recorded bits per second) is set in advance, and Specified signal processing has been performed at frequencies of this size. Thus, by performing signal processing at a high frequency, all audio data to be reproduced can be reproduced without noise or pauses in sound. [0004] However, in existing portable audio players, since signal processing is alway...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00G10L19/00G11B20/10
CPCG11B20/10527G11B2020/10546G11B20/10
Inventor 佐佐木勉
Owner SANYO ELECTRIC CO LTD
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