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MPEG$94575$ - tradução para Inglês

VIDEO ENCODING STANDARD

Mpeg7; Mpeg-47; MPEG-47; MPEG 7; Mpeg-7; MPEG7

MPEG

n. MPEG bestand; een gekomprimeerd bestand met video of geluiden die weinig aan kwaliteit verliest

Definição

MPEG-1

<compression, standard, algorithm, file format> 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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Wikipédia

MPEG-7

MPEG-7 is a multimedia content description standard. It was standardized in ISO/IEC 15938 (Multimedia content description interface). This description will be associated with the content itself, to allow fast and efficient searching for material that is of interest to the user. MPEG-7 is formally called Multimedia Content Description Interface. Thus, it is not a standard which deals with the actual encoding of moving pictures and audio, like MPEG-1, MPEG-2 and MPEG-4. It uses XML to store metadata, and can be attached to timecode in order to tag particular events, or synchronise lyrics to a song, for example.

It was designed to standardize:

a set of Description Schemes ("DS") and Descriptors ("D")
a language to specify these schemes, called the Description Definition Language ("DDL")
a scheme for coding the description

The combination of MPEG-4 and MPEG-7 has been sometimes referred to as MPEG-47.

https://en.wikipedia.org/wiki/MPEG-7