MPEG-1

MPG.mpgMPEG-1 Part 2MPEG.mpegMPEG1.MPG (MPEG-1).mpg/mpeg1mpe
MPEG-1 is a standard for lossy compression of video and audio.wikipedia
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Video CD

VCDVCDsvideo disk
It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) without excessive quality loss, making video CDs, digital cable/satellite TV and digital audio broadcasting (DAB) possible. MPEG-1 was used for full-screen video on Green Book CD-i, and on Video CD (VCD).
However, they are less widely playable in some Blu-ray Disc players and video game consoles such as the Sony PlayStation 3/4 due to lack of support for backward compatibility of the older MPEG-1 format.

H.261

CCITT/ITU H.261
Modeled on the successful collaborative approach and the compression technologies developed by the Joint Photographic Experts Group and CCITT's Experts Group on Telephony (creators of the JPEG image compression standard and the H.261 standard for video conferencing respectively), the Moving Picture Experts Group (MPEG) working group was established in January 1988.
In fact, all subsequent international video coding standards (MPEG-1 Part 2, H.262/MPEG-2 Part 2, H.263, MPEG-4 Part 2, H.264/MPEG-4 Part 10, and HEVC) have been based closely on the H.261 design.

DVD-Video

DVDDVDsextra features
The DVD-Video format uses MPEG-2 video primarily, but MPEG-1 support is explicitly defined in the standard.
To record moving pictures, DVD-Video uses either H.262/MPEG-2 Part 2 compression at up to 9.8 Mbit/s (9,800 kbit/s) or MPEG-1 Part 2 compression at up to 1.856 Mbit/s (1,856 kbit/s).

Philips CD-i

CD-iCD Interactive (CD-I)CD-i console
MPEG-1 was used for full-screen video on Green Book CD-i, and on Video CD (VCD).
The first Philips CD-i player, released in 1991 and initially priced around US$1,000, was capable of playing interactive CD-i discs, Audio CDs, CD+G (CD+Graphics), Karaoke CDs, Photo CDs and Video CDs (VCDs), though the latter required an optional "Digital Video Card" to provide MPEG-1 decoding.

MPEG program stream

.MPEGPSMPEG-PSPS
This structure was later named an MPEG program stream: "The MPEG-1 Systems design is essentially identical to the MPEG-2 Program Stream structure."
The PS format is specified in MPEG-1 Part 1 (ISO/IEC 11172-1) and MPEG-2 Part 1, Systems (ISO/IEC standard 13818-1 /ITU-T H.222.0 ).

MPEG-2

MPEG2DVDH.262 / MPEG-2 Part 2 video
In July 1990, before the first draft of the MPEG-1 standard had even been written, work began on a second standard, MPEG-2, intended to extend MPEG-1 technology to provide full broadcast-quality video (as per CCIR 601) at high bitrates (3–15 Mbit/s) and support for interlaced video.
The other is the program stream, an extended version of the MPEG-1 container format with less overhead than transport stream.

Leonardo Chiariglione

It was established in 1988 by the initiative of Hiroshi Yasuda (Nippon Telegraph and Telephone) and Leonardo Chiariglione.
This group, with a membership of over 300 experts, representing 20 countries and various industries having a stake in digital audio and video, produced the MPEG-1 and MPEG-2 standards that have facilitated the digital audio-visual revolution.

Lossy compression

lossylossy data compressioncompressed
MPEG-1 is a standard for lossy compression of video and audio.
MPEG-1 Part 2

Source Input Format

SIF
MPEG-1 videos are most commonly seen using Source Input Format (SIF) resolution: 352x240, 352x288, or 320x240.
Source Input Format (SIF) defined in MPEG-1, is a video format that was developed to allow the storage and transmission of digital video.

Video

analog videovideo albumvideo recording
MPEG-1 is a standard for lossy compression of video and audio.
MPEG-1 (ISO)

Motion compensation

motion estimationmotion compensatedmotion-compensated
The reverse of this process, performed by the decoder to reconstruct the picture, is called motion compensation.
Older designs such as H.261 and MPEG-1 video typically use a fixed block size, while newer ones such as H.263, MPEG-4 Part 2, H.264/MPEG-4 AVC, and VC-1 give the encoder the ability to dynamically choose what block size will be used to represent the motion.

MPEG Multichannel

7.1 channelsMultichannel support
The DVD-Video standard originally required MPEG-1 Layer II audio for PAL countries, but was changed to allow AC-3/Dolby Digital-only discs. MPEG-1 Layer II audio is still allowed on DVDs, although newer extensions to the format, like MPEG Multichannel, are rarely supported.
MPEG-1

Advanced Audio Coding

AACAAC/AAC+/eAAC+.aac
Decoding MP2 audio is computationally simple, relative to MP3, AAC, etc.
Therefore, MPEG-2 Part 7 is also known as MPEG-2 NBC (Non-Backward Compatible), because it is not compatible with the MPEG-1 audio formats (MP1, MP2 and MP3).

Compression artifact

artifactscompression artifactsmosquito noise
Compared to other digital compression artifacts, this issue seems to be very rarely a source of annoyance.
When motion prediction is used, as in MPEG-1, MPEG-2 or MPEG-4, compression artifacts tend to remain on several generations of decompressed frames, and move with the optic flow of the image, leading to a peculiar effect, part way between a painting effect and "grime" that moves with objects in the scene.

MP3

.mp3MP3 downloadmp3s
Perhaps the best-known part of the MPEG-1 standard is the MP3 audio format it introduced.
Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended—defining additional bit-rates and support for more audio channels—as the third audio format of the subsequent MPEG-2 standard.

Sampling (signal processing)

sampling ratesamplingsample rate
Sampling rates: 32000, 44100, and 48000 Hz

Motion JPEG

MJPEGM-JPEGAVI Motion JPEG
I-frame only MPEG-1 video is very similar to MJPEG video.
Whereas modern interframe video formats, such as MPEG1, MPEG2 and H.264/MPEG-4 AVC, achieve real-world compression ratios of 1:50 or better, M-JPEG's lack of interframe prediction limits its efficiency to 1:20 or lower, depending on the tolerance to spatial artifacting in the compressed output.

ISO/IEC JTC 1/SC 29

SC 29
ISO/IEC JTC 1/SC 29
ISO/IEC JTC 1/SC 29 has published 475 standards, including standards for JPEG (ISO/IEC 10918-1), JPEG-2000 (ISO/IEC 15444-1), MPEG-1 (ISO/IEC 11172-1), MPEG-2 (ISO/IEC 13818), MPEG-4 (ISO/IEC 14996-1), MPEG-4 AVC (ISO/IEC 14496-10), JBIG (ISO/IEC 11544), and MHEG-5 (ISO/IEC 13522-5).

Moving Picture Experts Group

MPEGMPEG VideoISO/IEC JTC 1/SC 29/WG 11
Modeled on the successful collaborative approach and the compression technologies developed by the Joint Photographic Experts Group and CCITT's Experts Group on Telephony (creators of the JPEG image compression standard and the H.261 standard for video conferencing respectively), the Moving Picture Experts Group (MPEG) working group was established in January 1988.
MPEG-1 (1993): Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s (ISO/IEC 11172). This initial version is known as a lossy fileformat and is the first MPEG compression standard for audio and video. It is commonly limited to about 1.5 Mbit/s although the specification is capable of much higher bit rates. It was basically designed to allow moving pictures and sound to be encoded into the bitrate of a Compact Disc. It is used on Video CD and can be used for low-quality video on DVD Video. It was used in digital satellite/cable TV services before MPEG-2 became widespread. To meet the low bit requirement, MPEG-1 downsamples the images, as well as uses picture rates of only 24–30 Hz, resulting in a moderate quality. It includes the popular MPEG-1 Audio Layer III (MP3) audio compression format.

Libavcodec

lavc
Libavcodec includes MPEG-1/2 video/audio encoders and decoders
MPEG-1

Group of pictures

GOPGOPsGroup Of Pictures (GOP)
The length between I-frames is known as the group of pictures (GOP) size.
P picture or P frame (predictive coded picture) – contains motion-compensated difference information relative to previously decoded pictures. In older designs such as MPEG-1, H.262/MPEG-2 and H.263, each P picture can only reference one picture, and that picture must precede the P picture in display order as well as in decoding order and must be an I or P picture. These constraints do not apply in the newer standards H.264/MPEG-4 AVC and HEVC.

Bit rate

bitratedata ratedata transfer rate
Bitrates for Layer I: 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416 and 448 kbit/s
1.15 Mbit/s max VCD quality (using MPEG1 compression)

TooLAME

This includes the ISO Dist10 audio encoder code, which LAME and TooLAME were originally based upon.
MPEG-1

Technical standard

standardstandardsindustry standard
MPEG-1 is a standard for lossy compression of video and audio.

Audio frequency

audioaudio frequenciesfrequencies
MPEG-1 is a standard for lossy compression of video and audio.