| podobné slovo | definícia |
mpeg
(wn) | MPEG
n 1: a set of standards adopted by the moving pictures experts
group for the compression of digital video and audio data
or a file of data compressed according to those standards |
empeg
(foldoc) | empeg
An in-car audio product that plays MP3 files from
a hard disk. It is based around a DEC/Intel StrongARM
S-1100 processor and runs a version of Linux. The {user
interface} is written in Python.
(http://empeg.com/).
See also MPEG.
(1999-09-14)
|
mpeg
(foldoc) | Moving Picture Experts Group
MPEG
(MPEG,
ISO/IEC JTC1/SC29 WG11) An ISO committee that generates
standards for digital video compression and audio. Also
the name of their algorithms.
MPEG-1 is optimised for CD-ROM and is the basis for MP3.
MPEG-2 is aimed at broadcast quality video for
applications such as digital television set-top boxes and
DVD. MPEG-4 is a standard for low bandwidth {video
telephony} and multimedia on the web. MPEG-3
was merged into MPEG-2.
(http://cselt.it/mpeg/). {MPEG.org
(http://mpeg.org/)}. {MPEG decoder
(ftp://toe.cs.berkeley.edu/pub/multimedia/mpeg/)}. {MPEG
routines (ftp://ftp.mni.mcgill.ca/pub/mpeg/)}.
(2000-05-31)
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mpeg-1
(foldoc) | MPEG-1
The first
MPEG format for compressed video, optimised for CD-ROM.
MPEG-1 was designed for the transmission rates of about 1.5
Mbps achievable with Video-CD and CD-i.
It uses discrete cosine transform (DCT) and Huffman coding
to remove spatially redundant data within a frame and
block-based motion compensated prediction (MCP) to remove
data which is temporally redundant between frames. Audio is
compressed using subband encoding. These algorithms allow
better than VHS quality video and almost CD quality audio to
be compressed onto and streamed off a single speed (1x)
CD-ROM drive.
MPEG encoding can introduce blockiness, colour bleed and
shimmering effects on video and lack of detail and
quantisation effects on audio.
The official name of MPEG-1 is International Standard
IS-11172.
(1999-01-06)
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mpeg-1 audio layer 1
(foldoc) | MPEG-1 audio layer 1
MP1
(MP1) A simple 32-subband
audio compressor using a floating point representation for
subband samples. Resolution and scale factor are stored for
groups of 12 subsamples. MP1 is only used for Philips DCC
Digital Compact cassette with data rates of 384 kbps.
(2001-12-02)
|
mpeg-1 audio layer 3
(foldoc) | MPEG-1 audio layer 3
MP3
MPEG-1 layer 3
(MP3) A digital audio {compression
algorithm} that acheives a compression factor of about twelve
while preserving sound quality. It does this by optimising
the compression according to the range of sound that people
can actually hear. MP3 is currently (July 1999) the most
powerful algorithm in a series of audio encoding standards
developed under the sponsorship of the {Moving Picture Experts
Group} (MPEG) and formalised by the International Organization
for Standardization (ISO).
MP3 is very different from Layer 2, using an additional MDCT
layer to increase frequency resolution. Its scale factor
groups are more optimised for the human ear, and it uses
nonlinear sample quantisation and Huffman coding.
MP3 files (filename extension ".mp3") can be downloaded from
many websites and can be played using software available for
most operating systems (also downloadable), e.g. Winamp for
PC, MacAmp for Macintosh, and mpeg123 for Unix.
MP3 files are usually downloaded completely before playing but
streaming MP3 is also possible. A program called a "ripper"
can be used to copy a selection from a music CD onto your
hard disk and another program called an encoder can convert
it to an MP3 file.
(2001-12-04)
|
mpeg-1 layer 3
(foldoc) | MPEG-1 audio layer 3
MP3
MPEG-1 layer 3
(MP3) A digital audio {compression
algorithm} that acheives a compression factor of about twelve
while preserving sound quality. It does this by optimising
the compression according to the range of sound that people
can actually hear. MP3 is currently (July 1999) the most
powerful algorithm in a series of audio encoding standards
developed under the sponsorship of the {Moving Picture Experts
Group} (MPEG) and formalised by the International Organization
for Standardization (ISO).
MP3 is very different from Layer 2, using an additional MDCT
layer to increase frequency resolution. Its scale factor
groups are more optimised for the human ear, and it uses
nonlinear sample quantisation and Huffman coding.
MP3 files (filename extension ".mp3") can be downloaded from
many websites and can be played using software available for
most operating systems (also downloadable), e.g. Winamp for
PC, MacAmp for Macintosh, and mpeg123 for Unix.
MP3 files are usually downloaded completely before playing but
streaming MP3 is also possible. A program called a "ripper"
can be used to copy a selection from a music CD onto your
hard disk and another program called an encoder can convert
it to an MP3 file.
(2001-12-04)
|
mpeg-2
(foldoc) | MPEG-2
A variant of
the MPEG video and audio compression algorithm and file
format, optimised for broadcast quality video. MPEG-2 was
designed to transmit images using progressive coding at 4
Mbps or higher for use in broadcast digital TV and DVD.
An MPEG-2 player can handle MPEG-1 data as well.
MPEG-2 has been approved as International Standard
IS-13818.
(1995-04-18)
|
mpeg-2 aac low profile
(foldoc) | MPEG-2 AAC Low Profile
A successor of
MP3 allowing transparent coding at data rates of 75-80% of
that of MP3. It is very different from MP3, only used
MDCT, no subband coding.
(2001-12-08)
|
mpeg-2 audio layer 3
(foldoc) | MPEG-2 audio layer 3
An extention
of MPEG-1 audio layer 3 for lower sampling rates (16-24 kHz)
targeting bit rates from 32-64 kbps (possibly 8-160 kbps). It
is often combined with MPEG-2 LSF.
(2001-12-04)
|
mpeg-2 low sampling frequencies extention
(foldoc) | MPEG-2 Low Sampling Frequencies Extention
MPEG-2 LSF
(MPEG-2 LSF)
An extension of MPEG-2, mostly used with {MPEG-2 audio layer
3} because the aim was medium quality at low bit rates, not
lower sampling frequencies.
(2001-12-04)
|
mpeg-2 lsf
(foldoc) | MPEG-2 Low Sampling Frequencies Extention
MPEG-2 LSF
(MPEG-2 LSF)
An extension of MPEG-2, mostly used with {MPEG-2 audio layer
3} because the aim was medium quality at low bit rates, not
lower sampling frequencies.
(2001-12-04)
|
mpeg-2 mc
(foldoc) | MPEG-2 Multi Channel Extention
MPEG-2 MC
(MPEG-2 MC) An
extension of MPEG-2 that uses up to 5 channels and about
1200 kbps.
(2001-12-08)
|
mpeg-2 multi channel extention
(foldoc) | MPEG-2 Multi Channel Extention
MPEG-2 MC
(MPEG-2 MC) An
extension of MPEG-2 that uses up to 5 channels and about
1200 kbps.
(2001-12-08)
|
mpeg-2.5 audio layer 3
(foldoc) | MPEG-2.5 audio layer 3
A non-standard
extention of MPEG-2 audio layer 3 by FhG for lowest
sampling rates (8-12 kHz) targeting bit rates from 16-32 kbps
(possibly 8-160 kbps).
(2001-12-04)
|
mpeg-21
(foldoc) | MPEG-21
A {file
format} designed to merge very different things in one object,
so you can store interactive material in this format (audio,
video, questions, answers, overlays, non-linear order,
calculation from user inputs, etc.)
[Technical details?]
(2001-12-02)
|
mpeg-3
(foldoc) | MPEG-3
A proposed
variant of the MPEG video and audio compression
algorithm and file format. MPEG-3 was intended as an
extension of MPEG-2 to cater for HDTV but was eventually
merged into MPEG-2.
Not to be confused with MP3 - MPEG-1 layer 3.
[Technical details?]
(1999-01-06)
|
mpeg-4
(foldoc) | MPEG-4
A {video
compression} standard planned for late 1998. MPEG-4 extends
the earlier MPEG-1 and MPEG-2 algorithms with synthesis of
speech and video, fractal compression, {computer
visualisation} and artificial intelligence-based {image
processing} techniques.
[Technical details?]
(1999-01-06)
|
mpeg-4 aac main profile
(foldoc) | MPEG-4 AAC Main Profile
A successor of
MP3 allowing transparent coding at data rates of 70-75% of
that of MP3. It is very different from MP3, only used
MDCT, no subband coding. It is much more complex that
MP3 and MPEG-2 AAC Low Profile.
(2001-12-08)
|
mpeg-4 aac ssr
(foldoc) | MPEG-4 Advanced Audio Coding Scalable Sampling Rate
MPEG-4 AAC SSR
(MPEG-4 AAC SSR) An AAC
flavour supporting different qualities for different targets.
One stream can contain up to 3 streams for 11.025 kHz (Stream
1), 22.05 (Stream 1 and 2) and 44.1 kHz (all 3 Streams)
sampling frequency. Quality is between Low Profile and Main
profile. See also JPEG-2000.
(2001-12-09)
|
mpeg-4 advanced audio coding scalable sampling rate
(foldoc) | MPEG-4 Advanced Audio Coding Scalable Sampling Rate
MPEG-4 AAC SSR
(MPEG-4 AAC SSR) An AAC
flavour supporting different qualities for different targets.
One stream can contain up to 3 streams for 11.025 kHz (Stream
1), 22.05 (Stream 1 and 2) and 44.1 kHz (all 3 Streams)
sampling frequency. Quality is between Low Profile and Main
profile. See also JPEG-2000.
(2001-12-09)
|
mpeg-4 harmonic vector excitation
(foldoc) | MPEG-4 Harmonic Vector eXCitation
MPEG-4 HVXC
(MPEG-4 HVXC) An MPEG-4
variant using parametric encoding with a target bit rate
of 20 kbps, for voice coding.
(2001-12-09)
|
mpeg-4 harmonics, individual lines and noise
(foldoc) | MPEG-4 Harmonics, individual lines and noise
MPEG-4 HILN
(MPEG-4 HILN) An MPEG-4
variant using parametric encoding with a target bit rate
of 30 kbps.
(2001-12-09)
|
mpeg-4 hiln
(foldoc) | MPEG-4 Harmonics, individual lines and noise
MPEG-4 HILN
(MPEG-4 HILN) An MPEG-4
variant using parametric encoding with a target bit rate
of 30 kbps.
(2001-12-09)
|
mpeg-4 hvxc
(foldoc) | MPEG-4 Harmonic Vector eXCitation
MPEG-4 HVXC
(MPEG-4 HVXC) An MPEG-4
variant using parametric encoding with a target bit rate
of 20 kbps, for voice coding.
(2001-12-09)
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mpeg-7
(foldoc) | MPEG-7
A successor to MPEG-4,
not standardized yet.
(2001-12-02)
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mpegplus
(foldoc) | MPEGplus
A non-ISO standard compressed audio
file format derived from MPEG-1 Layer 2.
(2001-12-11)
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mpeg
(vera) | MPEG
Motion Picture Expert Group [old term] (MPEG)
MPEG
Moving Picture Expert Group (org., ISO 11172-1, JTC1)
|
mpegts
(vera) | MPEGTS
Moving Picture Expert Group - Transport Stream (MPEG, TS),
MPEG-TS
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