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 MPEG
Layer 2 (MP2) |
Advanced
Audio Codec |
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MPEG layer 3
- MP3 - is a lossy audio coding standard that uses a relatively high-complexity
audio analysis system to characterize and highly compress audio signals.
The MP3 system achieves high-compression ratios (10:1 or more)
by removing redundant information and sounds that the human ear cannot
detect or perceive. The removal of information components that cannot be
detected (such as low level signals that occur simultaneously with high-level
signals) is called psychoacoustic compression. To obtain high fidelity
quality (e.g. music) with MP3 typically requires 64 kbps per audio channel.
The MP3 codec was standardized by the ISO/IEC Moving Picture Experts Group (MPEG) committee in 1992. MP3 is intended for high-quality audio (like music) and expert listeners have found some MP3-encoded audio to be indistinguishable from the original audio at bit rates around 192 kbps. The design of the Layer 3 (MP3) codec was constrained by backward compatibility with the Layer 1 and Layer 2 codecs of the same family. MP3Pro is the Motion Picture Experts Group Layer 3 (MP3) system with spectral band replication (SBR) added to improve audio quality and/or lower the necessary data transmission rate.
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Introduction to MPEG This book explains the basics of audio and video digitization and compression and the standard formats that are used be MPEG. You will learn about the different MPEG audio coders and video coder options. $19.99 Printed, $16.99 eBook |
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Introduction to MPEG
