基于DSP32C的cd级音频和彩色静态图像多媒体平台

Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics Pub Date : 1900-01-01 DOI:10.1109/ASPAA.1991.634115

S. Quackenbush

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引用次数: 0

摘要

本文介绍了一种基于AT&T 386/SX PC机和DSP32C协处理器的多媒体数据库浏览器。多媒体数据库中的每个项目由512 × 480像素的彩色静止图像和20 Hz至20 kHz的单音音频信号组成，该信号可以具有任意持续时间。压缩后的图像和音频信号存储在数据库中，通过通信通道检索，使用DSP32C解码，显示和播放。通道可以是PC背板，本地或广域网，或基本速率ISDN电信链路。音频被压缩6 1(2.67比特/采样在48 lrHz采样率)，并产生一个重建的信号，是无法区分从扬声器听到的原始信号。图像压缩是数据相关的，对于失真可以忽略不计的重建图像，其范围从20:1到50:1(每像素1.2到0.5比特)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A CD-Quality Audio and Color Still Image Multi-Media Platform using the DSP32C

The paper describes a multi-media database browser based on a AT&T 386/SX PC with a DSP32C coprocessor. Each item in the multi-media database consists of a 512 by 480 pixel color still image and a 20 Hz to 20 kHz monophonic audio signal that can have arbitrary duration. Compressed image and audio signals are stored in a database and are retrieved through a communications channel, decoded using the DSP32C, and displayed and played. The channel could be the PC backplane, a local or wide area network, or a basic rate ISDN telecommunications link. Audio is compressed 6 1 (2.67 bits/sample at 48 lrHz sampling rate) and produces a reconstructed signal that is indistinguishable from the original when heard over a loudspeaker. Image compression is datadependent and ranges from 20:l to 5O:l (1.2 to 0.5 bits per pixel) for reconstructed images with negligible distortion.

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Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics

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