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...s of DVI [[IMA ADPCM]], both of which are encoded and decoded with the IMA ADPCM algorithm. The original variant encodes the top nibble of a byte first, the ...s://www.freesoft.org/CIE/RFC/1890/index.htm RFC1890] is a variant of [[IMA ADPCM]].

* Audio ID: 0x0011 ...tains a field named nBlockAlign. This field reveals the size of a block of IMA-encoded data.

* Microsoft Audio ID: 0x0010 * Official Specification: http://multimedia.cx/mirror/dialogic-adpcm.pdf

The [[Interactive Multimedia Association]] (IMA) developed an ADPCM algorithm designed to be used in entertainment multimedia applications. It ...bes the common IMA decoding algorithm. See the [[:Category:IMA ADPCM Audio Codecs]] page for various formats used for storing the data on disk.

...ream) plus some information at the end. If container has audio then 16-bit audio size and payload follow, otherwise all of the payload is video frame data. +6A - some audio-related value

...dio counterpart to the [[:Category:Video FourCCs|video FourCC]]. It is the audio format identifier used in the [[RIFF]] based multimedia formats by [[Micros * [[Microsoft_ADPCM|0x0002 Microsoft ADPCM CODEC for MSACM msacm.msadpcm msadp32.acm]]

...68-byte header a number of blocks follows with each block grouping several audio and video frames. 4 bytes - total number of audio frames

Surprisingly, unlike previous [[ESCAPE]] codecs, Escape 130 was completely redesigned. Now it operates in mixed [[YUV]]/[[R ...nd container; the only feature worth mentioning here is that the video and audio are contained in pairs of opaque chunks of arbitrary size. All known Escape

...]] video codec, and the audio is either uncompressed PCM or a custom [[IMA ADPCM]] variant. == Known video codecs ==

bytes 804-805 audio sample rate bytes 806-807 audio frame length/sample resolution