MPEG-1 audio layer 1

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MPEG-1 Audio Layer 1 (MP1) is a method for audio data compression standardized by the Moving Picture Experts Group . The attempt is made not to generate any audible losses for humans.

The first audio layer is a forerunner of the well-known MP3 audio format . A filter bank with 32 frequency bands of the same bandwidth is used. The quantization resolution of each band is chosen so that the imperceptible signal parts are drowned out in the quantization noise. Compared to the established MP3, this audio format still contained the least amount of complexity and compression.

MPEG-1 Audio Layer 1 with a bit rate of 384 kbit / s was used as audio coding for the Digital Compact Cassette (DCC) developed by Philips . The name of the Philips company at that time for this codec was PASC and stood for Precision Adaptive Sub-band Coding .

literature

  • Roland Enders: The home recording manual. The way to optimal recordings. 3rd, revised edition, revised by Andreas Schulz. Carstensen, Munich 2003, ISBN 3-910098-25-8 .