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所谓软静噪,对CD唱机来讲,即是指当CD机放VCD盘片时,DSP芯片内部自动对其输出数据进行封锁,即使将其外部静噪控制端接地,DSP芯片外部也仍无数据输出(包括DATA和DIGITAL)。目前,由于国内各公司开发生产的VCD升级卡,改机时均需从原CD机DSP芯片取用BCK、DATA、LRCK三个信号线或DIGITAL一个信号线,这种方式对有软静噪的机种则无能为力,基于这一情况,本文将介绍一种由贵州中立高技术公司首家开发成功的VL(C)型万能升级卡,原则上讲,任何CD、LD机,不管有无软静噪,均可用它升级为VCD影碟机。
The so-called soft-muting, CD player is concerned, that is when the CD player to play VCD disc, DSP chip automatically outputs its internal data to block, even if the external noise control ground, the DSP chip is still external Data output (including DATA and DIGITAL). At present, due to the development and production of domestic companies to upgrade the VCD card, change machines are required from the original CD machine DSP chip access BCK, DATA, LRCK three signal lines or a DIGITAL signal line, this approach has a soft mute Based on this situation, this article will introduce a VL (C) -type universal upgrade card first developed by Guizhou neutral high-tech company, in principle, any CD, LD machine, with or without soft static Noise, can be used to upgrade it to VCD player.