Enhanced Audio Codec is an
audio codec
An audio codec is a device or computer program capable of encoding or decoding a digital data stream (a codec) that encodes or decodes audio. In software, an audio codec is a computer program implementing an algorithm that compresses and decompres ...
developed and owned by Beijing E-World, that uses a unique perceptual model,
spectral band replication
Spectral band replication (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain.
It can be combined with any Audio compression (data), audio compression co ...
, to compress the
audio signal
An audio signal is a representation of sound, typically using either a changing level of electrical voltage for analog signals or a series of binary numbers for Digital signal (signal processing), digital signals. Audio signals have frequencies i ...
by utilizing the redundancy as well as the relevancy. The EAC codec supports
mono
Mono may refer to:
Biology
* Infectious mononucleosis, "the kissing disease"
* Monocyte, a type of leukocyte (white blood cell)
* Monodactylidae, members of which are referred to as monos
Technology and computing
* Mono (audio), single-c ...
,
stereo
Stereophonic sound, commonly shortened to stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configurat ...
and
5.1 surround sound
5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. It uses five full-bandwidth channels and one low-frequency effects channel (the "point one"). Dolb ...
modes for encoding and decoding. EAC is part of the EVD system specification.
External links
New Technology - EVD player will launch to market soonCODING TECHNOLOGIES AND BEIJING E-WORLD TECHNOLOGY FORM AUDIO CODEC JOINT VENTURE IN CHINA
*https://web.archive.org/web/20070929000645/http://www.davworld.com/eindex.htm
Audio codecs