{"title":"A CD-Quality Audio and Color Still Image Multi-Media Platform using the DSP32C","authors":"S. Quackenbush","doi":"10.1109/ASPAA.1991.634115","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":146017,"journal":{"name":"Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ASPAA.1991.634115","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
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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