MPEG-4
Compression for video
MPEG-4 is a standard for compressing digital audio and video, developed by the Moving Picture Experts Group.
It enables efficient streaming and storage of multimedia content, supporting everything from low-bandwidth mobile video to high-definition film.
The .mp4 file extension derives from this standard.
MPEG-4 introduced features like interactive content and digital rights management that earlier standards lacked.
Video compression standard
- resolutionFormal decision or determination
- frame rateDisplay refresh frequency
- 1080pVideo resolution standard
- 720p1280x720 pixel display
4K · high-definition · aspect ratio · pixels · playback · streaming · video quality · interlacing
Sacrificing fidelity for size
- codecData compression algorithm
- bitrateData transfer speed
- quantizationConversion to discrete values
- artifactsHuman-made historical objects
blockiness · compression ratio · DCT · I-frame · file size
Sound compression format
- MP3Lossy audio compression standard
- sample rateCaptures per time unit
- bit depthBits per sample value
- audio syncSound-picture temporal alignment
audio compression · channels · surround sound · audio track · audio codec · bitrate · audio stream
Global standards body
- specificationDetailed technical requirement
- profilesSummaries of characteristics
- levelsHeights or ranked stages
- complianceAdhering to requirements
interoperability · standardization · backward compatibility · licensing · high profile
Media format conversion process
- renderingInterpretive depiction or performance
- encoderFormat conversion component
- decoderDevice that unscrambles signals
- HandBrakeVideo format conversion tool
post-production · video editing · export · buffering · hardware acceleration · preset
H.264
Video compression standard
- resolutionFormal decision or determination
- frame rateDisplay refresh frequency
- 1080pVideo resolution standard
720p · 4K · high-definition · aspect ratio · pixels · playback · streaming · video quality · interlacing · progressive scan
lossy
Sacrificing fidelity for size
- codecData compression algorithm
- bitrateData transfer speed
- quantizationConversion to discrete values
artifacts · blockiness · compression ratio · DCT · I-frame · file size
AAC
Sound compression format
- MP3Lossy audio compression standard
- sample rateCaptures per time unit
- bit depthBits per sample value
audio compression · audio sync · channels · surround sound · audio track · audio codec · bitrate · audio stream
ISO
Global standards body
- specificationDetailed technical requirement
- profilesSummaries of characteristics
- levelsHeights or ranked stages
compliance · interoperability · standardization · backward compatibility · licensing · high profile
transcoding
Media format conversion process
- renderingInterpretive depiction or performance
- encoderFormat conversion component
- decoderDevice that unscrambles signals
HandBrake · post-production · video editing · export · buffering · hardware acceleration · preset
multiplexing
Combining signals on one line