The format Digital Video (DV) is a video standard of domestic, industrial and broadcast range. It is based on the DCT algorithm and protocol used as data transmission or IEEE 1394 Firewire. Usually written to tape a quarter inch (with three variants: Mini, M and L). It was created in 1996 as an international standard in accordance with IEC 61834 standard, which defines the codec and the tape type. It was developed as a digital video format for an industrial setting, but excellent value meant that it has become the dominant home video format such as Mini-DV, and encountered professionals, DVCAM and DVCPRO versions. One type DV50 format, Digital-S, based on this standard but recorded in half-inch tape. Its popularity has caused it to be commercial basis even for an inexpensive high-definition format, HDV, only share the tape type.
MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. The only official filename extension for MPEG-4 Part 14 files is .mp4, but many have other extensions, most commonly .m4a and .m4p. M4A (audio only) is often compressed using AAC encoding (lossy), but can also be in Apple Lossless format. M4P is a protected format which employs DRM technology to restrict copying. MPEG-4 Part 14 (formally ISO/IEC 14496-14:2003) is a standard specified as a part of MPEG-4. Some devices advertised as "MP4 Players" are simply MP3 Players that also play AMV video or some other video format, and do not necessarily play the MPEG-4 Part 14 format.