MPEG-4 is a method of defining compression of audio and visual (AV) digital data.Uses of MPEG-4 include compression of AV data for web (streaming media) and CD distribution, voice (telephone, videophone) and broadcast television applications.
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. AAC (Advanced Audio Coding) was standardized as an adjunct to MPEG-2 before MPEG-4 was issued.
Initially, MPEG-4 was aimed primarily at low bit-rate video communications; however, its scope as a multimedia coding standard was later expanded. MPEG-4 is efficient across a variety of bit-rates ranging from a few kilobits per second to tens of megabits per second. MPEG-4 provides the following functions:
1. Improved coding efficiency over MPEG-2
2. Ability to encode mixed media data (video, audio, speech)
3. Error resilience to enable robust transmission
4. Ability to interact with the audio-visual scene generated at the receiver
Dibsys MPEG-2/MPEG-4 HD Encoder EMI3440 is a good choice to offer HD channels or more.The signals source could be from satellite receivers, closed-circuit television cameras, Blue-ray players, and antenna etc. Its output signals are to be received by TVs, STB and etc with corresponding standard.
It can wildly used in public places such as metro, market hall, theater, hotels, restaurants and etc for advertising, monitoring, training and educating in company, schools, campuses, hospital…
Solution for hotel hospital via cosxial cable: