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 IP
Audio DAQ |
IP
Audio Summary |
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Audio coder/decoders - Codecs - are devices or
software that are used to compress (code) or expand (decode) information to a
fewer number of bits for more efficient transmission and storage. Normally the
term codec applies only to compression of human-perceived signals such as
speech, audio, images, or video.
MPEG Layers - Version of the MPEG standard. Telephone - Audio frequency range limited to 4 kHz (no high
frequencies) Mobile This figure shows the basic operation of an audio codec. This diagram shows that the audio coding process begins with digitization of audio signals. The next step is to analyze the signal into key parts or segments and to represent the digital audio signal with a compressed code. The compressed code is transmitted to the receiving device which converts the code back into its original audio form.
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This book explains the
fundamentals of audio, how it is digitized and compressed, basics of audio
streaming, methods that are used to store audio, how to host digital audio on
the web, audio control protocols, IP Audio streaming quality measurements and
control and how digital rights management may be incorporated into IP Audio. |
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