Operating instructions

Transient pre-noise processing - to reduce "pre-noise" artifacts before sharp transients.

Enhanced channel coupling – which maintains phase relationships between channels, and

improves performance of matrix decoders.

Adaptive hybrid transform processing – an improved bit allocation and quantization

algorithm

SMPTE 302M: Mapping of AES3 Data into an MPEG-2 Transport

Stream

Though not specifically a coding standard, this does define a method of carrying AES3

uncompressed audio streams in an MPEG-2 transport stream. The AES stream can contain

non-audio data as well as uncompressed audio. This mechanism can be used to carry

Linear PCM audio, or Dolby E data.

Dolby E

Dolby E was developed by Dolby Laboratories. It allows up to 8 channels of Dolby E

compressed audio to be distributed over an existing 2 channel digital infrastructure. The

compression applied is less than that for consumer codecs (i.e. Dolby Digital), so is better

quality and the audio can be decompressed and re-compressed several times. The Dolby E

stream can also include metadata and timecode.

Dolby E frame duration is either equal to or double the duration of a video frame. For

interlaced formats the duration matches a video frame, but is double the frame duration for

progressive formats. This facilitates easier editing of video and audio in the digital domain.

Dolby E frames are generally aligned to video frames.