Since MPEG-4 is an open platform, companies and organizations can develop different formats according to the MPEG-4 standard.
These technologies are based on G723, G728, MPEG-1 and MPEG-2.
Then use video transform coding technology. (CELP, CodeExcitedLinearPredictive) coding technology and code rate above 16kbit/s. For example, 2~4kbit/s speech coding of 8kHz sampling frequency and 4~16kbit/s speech coding of 8kHz or 16kHz sampling frequency generally adopt parametric coding and 6~24kbit/s speech coding generally adopts code excitation linear prediction. The MPEG-4 study compares various existing audio coding algorithms and supports natural sound coding from 2 to 64 kbit/s. The MPEG-4 audio portion combines the synthesized encoding of audio with the encoding of natural sound and supports object features of audio. Compared to MPEG-1 and MPEG-2, MPEG-4 supports not only natural sounds (such as voice and music) but also synthetic sounds (such as MIDI). MPEG-4 includes the vast majority of MPEG-1 and MPEG-2 features and the strengths of other formats, and adds and extends support for Virtual Reality Modeling Language (VRML), object-oriented composite files (including Sound effects, video and VRML objects), as well as digital rights management (DRM) and other interactive features. MP4 is a set of compression coding standards for audio and video information. MP3, WMA, AAC, WAV, M4A, AC3, MP2, SUN AU FormatĪVI, MPEG, MP4, MPEG-4 AVC, MPEG-4, DivX, XviD, H.264, H.Part 1: How to Convert Video to MP4 on a Mac Part 2: How to Convert MP4 Video to Any Format on a Mac What IS MP4? Windows mobile devices: Nokia Lumia 920, Nokia Lumia 820, HTC Windows Phone 8X, HTC Radar 4G, Samsung Focus SĪVI, MPEG, WMV, MP4, MPEG-2, MPEG-4, MOV, M4V, VOB, ASF, 3GP, 3G2, QT, YUV, DAT
General MP4 players: Archos, Creative Zen, iRiver, etcĪndroid mobile devices: Samsung Galaxy Note II (n7100), Samsung Galaxy S III (i9300), Samsung Galaxy S II (i9100), LG Optimus 4X HD (P880), LG Optimus 2X (P990), HTC DROID DNA (X920), HTC EVO 4G LTE (ONE X), HTC ONE V, Motorola DROID RAZR MAXX HD, Motorola Photon Q ,Sony Xperia TL (LT30), Sony Xperia S (LT26), Sony Xperia P (LT22)
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