TwinVQ is one of the object types defined in MPEG-4 Audio, published as subpart 4 of ISO / IEC 14496-3 ( for the first time in 1999-a. k. a.

) In MPEG-4 Visual, there are two types of video object layers: the video object layer that provides full MPEG-4 functionality, and a reduced functionality video object layer, the video object layer with short headers ( which provides bitstream compatibility with base-line H. 263 ).

It supports several MPEG-4 Audio object types ( LC, Main, LTP for encoding and SBR, PS, ER, LD for decoding ), file formats ( ADTS AAC, raw AAC, MP4 ), multichannel and gapless encoding / decoding and MP4 metadata tags.

It is MPEG-2 and MPEG-4 AAC decoder and supports MPEG-4 audio object types LC, Main, LTP, LD, ER, SBR and PS, which can be combined also to HE-AAC and HE-AACv2 Profile ( AAC LC + SBR + PS ).

MPEG-4 absorbs many of the features of MPEG-1 and MPEG-2 and other related standards, adding new features such as ( extended ) VRML support for 3D rendering, object-oriented composite files ( including audio, video and VRML objects ), support for externally specified Digital Rights Management and various types of interactivity.

With the help of standard procedures, MPEG-4 data can be interpreted and transformed into other signal types compatible with any available network.

MPEG-4 Audio is a new type of audio standard that integrates numerous different types of audio coding: natural sound and synthetic sound, low bitrate delivery and high-quality delivery, speech and music, complex soundtracks and simple ones, traditional content and interactive content.

In the latest international standard, known as H. 264 / MPEG-4 AVC, the granularity of the establishment of prediction types is brought down to a lower level called the slice level of the representation.

It extends hymn with additional functionality including the ability to add, delete, and update MPEG-4 atoms in file types of M4A, M4B, M4P, and MP4.

* Audio codec: G. 726, G. 711, G. 722 ( wideband ), G. 729. 1 ( wideband ) and MPEG-4 ER LD AAC ( wideband and super-wideband )

AAC ( Advanced Audio Coding ) was standardized as an adjunct to MPEG-2 ( as Part 7 ) before MPEG-4 was issued.

Windows Media Player 12 adds native support for H. 264 and MPEG-4 Part 2 video formats, AAC audio and 3GP, MP4 and MOV container formats.

* ISO / IEC MPEG audio standards: MP1, MP2, MP3, AAC, HE-AAC and MPEG-4 ALS

AAC, on the other hand, normally uses a pure MDCT ; only the ( rarely used ) MPEG-4 AAC-SSR variant ( by Sony ) uses a four-band PQF bank followed by an MDCT.

AC-3 uses a Kaiser-Bessel derived ( KBD ) window, and MPEG-4 AAC can also use a KBD window.

The MPEG-4 Part 3 consists of a variety of audio coding technologies-from lossy speech coding ( HVXC, CELP ), general audio coding ( AAC, TwinVQ, BSAC ), lossless audio compression ( MPEG-4 SLS, Audio Lossless Coding, MPEG-4 DST ), a Text-To-Speech Interface ( TTSI ), Structured Audio ( using SAOL, SASL, MIDI ) and many additional audio synthesis and coding techniques.

These early versions of QTFairUse would save only the " raw " AAC ( not contained in an MPEG-4 ( MP4 ) container ), but later incarnations properly supported full conversions.

* noise substitution techniques ( as in ATSC A-52 and MPEG-4 AAC V2 )

* AAC-LC ( the most widely used AAC profile defined in MPEG-4 Part 3 )

The two standards also share the same modulation scheme ( COFDM ) and codecs based upon MPEG-4 AAC.

SBR has been combined with AAC LC to create MPEG-4 High Efficiency AAC ( HE-AAC ), with WMA 10 Professional to create WMA 10 Pro LBR, with MP3 to create mp3PRO, and with MPEG-1 Layer II ( MP2 ).

VOB file cannot contain AAC audio ( MPEG-2 Part 7 ), MPEG-4 compression formats and others, which are allowed in MPEG program stream standard.

For the storage of MPEG-4 media ( AAC audio, MPEG-4 Part 2 video, MPEG-4 Part 10-H. 264 / AVC ) in 3G2 files, the 3G2 specification refers to the MP4 file format and the AVC file format specification, which described usage of this content in the ISO base media file format.

* Audio imported from CD onto a PlayStation 3 when it is set to encode to the MPEG-4 AAC codec will copy onto USB devices in the 3GP format.

The K700 also has a built-in email client, WAP and HTML browser which supports the SVG Tiny specification, a media player which is capable of playing MIDI, WAV, MP3 and AAC audio files and 3GP, MPEG-4 video files, and an FM radio ( which is only operable when the supplied headphones are inserted ).

* MPEG-4 AAC (- LC / HE / HEv2 profiles ) ( in MP4 or RM containers )

This service used ISO MPEG-4 Version 1 Simple Profile @ L3 video and AAC audio encapsulated in MPEG transport stream.

Evolution from MPEG-2 AAC LC ( Low Complexity ) Profile and MPEG-4 AAC LC MPEG-4 Part 3 # MPEG-4 Audio Object Types | Object Type to HE-AACv2 Profile.

* The MPEG-4 format provides end users with a wide range of interaction with various animated objects.

The MPEG-4 format can perform various functions, among which might be the following:

Sony decided to choose Memory Stick Video format ( which actually is H. 264 / MPEG-4 AVC format ) as standard for Walkman MP3 Video Player.

For example, video created with a standard MPEG-4 Part 2 codec such as Xvid can be decoded ( played back ) using any other standard MPEG-4 Part 2 codec such as FFmpeg MPEG-4 or DivX Pro Codec, because they all use the same video format.

Some newer devices also play videos in the MPEG-4 ASP video compression format ( such as DivX ) popular in the Internet.

Xvid is not a video format – it is a program ( codec ) for compressing and decompressing to the MPEG-4 ASP format.

Current development work is focusing on Theora, an open and patent-free video format and codec designed to compete with the patented MPEG-4, RealVideo, and Windows Media Video.

A third generation of Digibox also exists, with the additional ability to receive DVB-S2 HDTV signals in the MPEG-4 format.

The video is compressed according to the MPEG-4 AVC ( aka H. 264 ) format, but the file format is not MPEG-4.

* Simple Aggregation Format, a format for aggregating MPEG-4 Part 20 ( LASeR ) content with audio / video streams

* The native stream format for DVB-S2 is called Generic Stream ( GS ), and can be used to efficiently carry IP-based data, including MPEG-4 AVC / H. 264 services.

Nero Digital can generate streams in the 3GP / MPEG-4 Part 14 (< tt >". mp4 "</ tt >) container format and includes two video and two audio codecs:

The default file format for software encoding is a RTJPEG or MPEG-4 video stored in a slightly-modified version of Roman Hochleitner's " NuppelVideo " (. nuv ) container.

The video is encoded in the H. 264 / MPEG-4 AVC format, with the audio in ATRAC3plus.

* H. 264 / MPEG-4 AVC, Advanced Video Coding, a digital video-compression format

The 3GP file format stores video streams as MPEG-4 Part 2 or H. 263 or MPEG-4 Part 10 ( AVC / H. 264 ), and audio streams as AMR-NB, AMR-WB, AMR-WB +, AAC-LC, HE-AAC v1 or Enhanced aacPlus ( HE-AAC v2 ).

3GPP allowed use of AMR and H. 263 codecs in the ISO base media file format ( MPEG-4 Part 12 ), because 3GPP specified the usage of the Sample Entry and template fields in the ISO base media file format as well as defining new boxes to which codecs refer.