MPEG-2
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| MPEG-2 | |
|---|---|
| Name | MPEG-2 |
| Extension | .mpg, .mpeg, .m2v |
| Developed by | ISO, IEC |
| Initial release | 1994 |
| Extended from | MPEG-1 |
| Extended to | MPEG-3, MPEG-4 |
MPEG-2 is a widely used digital video compression standard developed by the ISO and IEC in collaboration with the SMPTE and the EBU. It was designed to provide high-quality video and audio for applications such as DVDs, HDTV broadcasts, and cable TV. The development of MPEG-2 involved the contributions of many experts from organizations such as IBM, Microsoft, and Sony, and was influenced by earlier standards like MPEG-1 and H.261. The standard has undergone several revisions, with the most recent version being maintained by the ISO/IEC JTC 1/SC 29 committee, which also oversees other multimedia standards like MPEG-4 and JPEG.
Introduction
The introduction of MPEG-2 marked a significant improvement in digital video compression, enabling the widespread adoption of digital television and other multimedia applications. The standard was developed in collaboration with the SMPTE and the EBU, and was influenced by the work of pioneers like Leonard Chiariglione and Hiroshi Yasuda. The development of MPEG-2 also involved the participation of companies like Toshiba, Panasonic, and Philips, which contributed to the standard's widespread adoption. The standard's success can be attributed to its ability to provide high-quality video and audio, as demonstrated by its use in applications like BBC broadcasts and NHK transmissions.
History
The development of MPEG-2 began in the late 1980s, with the formation of the MPEG committee, which was established by the ISO and IEC. The committee was chaired by Leonard Chiariglione, who played a key role in the development of the standard. The first meeting of the MPEG committee was held in 1988, and was attended by representatives from organizations like IBM, Microsoft, and Sony. The standard was finalized in 1994, and was published as ISO/IEC 13818. The development of MPEG-2 was influenced by earlier standards like MPEG-1 and H.261, and was also influenced by the work of the SMPTE and the EBU.
Technical Details
The MPEG-2 standard uses a combination of DCT and quantization to compress video data. The standard also uses Huffman coding and RLE to compress audio data. The standard supports a wide range of video and audio formats, including 4:2:0 and 4:2:2 chroma subsampling, and AC-3 and MP2 audio coding. The standard also supports a range of aspect ratios, including 4:3 and 16:9. The technical details of MPEG-2 have been influenced by the work of experts like Karlheinz Brandenburg and Harald Popp, who have made significant contributions to the field of audio and video compression.
Applications
The MPEG-2 standard has a wide range of applications, including DVDs, HDTV broadcasts, and cable TV. The standard is also used in applications like satellite TV and IPTV. The standard's high-quality video and audio have made it a popular choice for applications like BBC broadcasts and NHK transmissions. The standard is also used in applications like VOD and streaming media, where its ability to provide high-quality video and audio over low-bandwidth connections has made it a popular choice. Companies like Netflix and Amazon Prime Video have also adopted MPEG-2 for their streaming services.
Variants and Profiles
The MPEG-2 standard has several variants and profiles, including MP@ML and MP@LL. The standard also has several profiles, including SP and MP. The standard's variants and profiles have been developed to support a range of applications, from low-bitrate video conferencing to high-bitrate HDTV broadcasts. The development of variants and profiles has involved the participation of companies like Toshiba, Panasonic, and Philips, which have contributed to the standard's widespread adoption. The standard's variants and profiles have also been influenced by the work of experts like Leonard Chiariglione and Hiroshi Yasuda.
Standardization
The MPEG-2 standard was standardized by the ISO and IEC in 1994. The standard is maintained by the ISO/IEC JTC 1/SC 29 committee, which is responsible for the development and maintenance of multimedia standards like MPEG-4 and JPEG. The standard has undergone several revisions, with the most recent version being published in 2013. The standardization of MPEG-2 has involved the participation of organizations like the SMPTE and the EBU, which have contributed to the standard's widespread adoption. The standard's standardization has also been influenced by the work of experts like Karlheinz Brandenburg and Harald Popp, who have made significant contributions to the field of audio and video compression.