{"id":3709,"date":"2021-05-12T16:21:57","date_gmt":"2021-05-12T16:21:57","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=3709"},"modified":"2021-05-12T16:21:57","modified_gmt":"2021-05-12T16:21:57","slug":"lossy-compression-part-3","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/lossy-compression-part-3\/","title":{"rendered":"Lossy Compression Part 3"},"content":{"rendered":"

Lossy Compression Part 3<\/strong><\/p>\n

\"lossy<\/p>\n

MPEG-1 and MPEG-2 video compression formats<\/p>\n

\"lossless<\/p>\n

As an initial step in image processing, the MPEG-1 and MPEG-2 compression formats divide the reference frames into several equal blocks, which are then subjected to a floppy cosine transform (DCT). Compared to MPEG-1, the MPEG-2 compression format provides better image resolution at a higher video bit rate by using new compression algorithms and elimination of redundancy and encoding of the output data stream. . Also, the MPEG-2 compression format allows you to select the compression level due to quantization precision. For video with a resolution of 352×288 pixels, the MPEG-1 compression format provides a bit rate of 1.2 – 3 Mbps and MPEG-2 – up to 4 Mbps.<\/p>\n

Compared with MPEG-1, the MPEG-2 compression format has the following advantages:<\/p>\n

MPEG-2 provides scalability for various levels of image quality in a single video stream.
\nIn the MPEG-2 compression format, the precision of the motion vector increases to 1\/2 pixel.
\nUser can select arbitrary discrete cosine transform precision.
\nAdditional prediction modes are included in the MPEG-2 compression format.
\nCompression format MPEG-4<\/p>\n

MPEG-4 uses a technology called fractal image compression. Fractal compression (contour-based) means extracting the contours and textures of objects in the image. The contours are presented in the form of so-called. splines (polynomial functions) and are encoded with reference points. Textures can be represented as spatial frequency transform coefficients (eg, discrete cosine or wavelet transform).<\/p>\n

The bit rate range that the MPEG 4 video image compression format supports is much wider than that of MPEG 1 and MPEG 2. The new developments from the specialists are aimed at a complete replacement of the processing methods used by the MPEG 2 format. The MPEG 4 video compression format supports a wide range of standards and data transfer rates. MPEG 4 includes interlaced and progressive scanning techniques and supports arbitrary spatial resolutions and bit rates ranging from 5 kbps to 10 Mbps. MPEG 4 has an improved compression algorithm that improves quality and efficiency at all supported bit rates.<\/p>\n","protected":false},"excerpt":{"rendered":"

Lossy Compression Part 3 MPEG-1 and MPEG-2 video compression formats As an initial step in image processing, the MPEG-1 and MPEG-2 compression formats divide the reference frames into several equal blocks, which are then subjected to a floppy cosine transform (DCT). Compared to MPEG-1, the MPEG-2 compression format provides better image resolution at a higher … Continue reading “Lossy Compression Part 3”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[61136,61122,61125,61124,62460,61158,61143,61129,61142,62221,61137,53665,62461,62222,61134,61144,61119,33209,61121,61120,61126,61127,62459,61133,61130,61132,61148,62462,61146,61140,61139,61156,62464,61151,61150,62463,61154,61164,61152,61155,61157,62465,61159,61160,61161,61145,62467,61147,62466,61162,61163],"class_list":["post-3709","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-are-lossy-compression","tag-can-lossy-compression-be-reversed","tag-do-lossy-compression","tag-does-lossy-compression","tag-does-lossy-compression-reduce-quality","tag-examples-of-where-lossy-compression-is-used","tag-how-does-lossy-compression","tag-how-does-lossy-compression-work","tag-how-is-lossy-compression-beneficial","tag-how-is-lossy-compression-useful","tag-how-lossy-compression-works","tag-how-lossy-file-compression","tag-how-to-pronounce-lossy-compression","tag-is-a-lossy-compression-of-the-image-mcq","tag-is-lossy-compression","tag-is-lossy-compression-faster","tag-is-lossy-compression-reversible","tag-lossy-compression-can-be-used-for-quizlet","tag-what-are-lossy-compression-algorithm","tag-what-are-lossy-compression-techniques","tag-what-can-lossy-compression-not-be-used-for","tag-what-cant-lossy-compression-be-used-for","tag-what-does-lossy-compression-do-to-files","tag-what-does-lossy-compression-do-to-files-mcq","tag-what-does-lossy-compression-mean","tag-what-does-lossy-compression-mean-in-photography","tag-what-is-lossy-compression-in-computer-science","tag-what-is-lossy-compression-technique","tag-what-is-lossy-compression-used-for","tag-what-lossy-compression-do","tag-whats-lossy-compression","tag-when-do-you-use-lossy-compression","tag-when-is-lossy-compression-appropriate","tag-when-is-lossy-compression-used","tag-when-lossy-compression-would-be-appropriate","tag-when-should-lossy-compression-be-used","tag-when-should-you-use-lossy-compression","tag-when-would-lossy-compression-be-appropriate","tag-when-would-lossy-compression-be-used","tag-when-would-you-use-lossy-compression","tag-where-lossy-compression-is-used","tag-where-would-you-use-lossy-compression","tag-which-is-the-lossy-compression-technique","tag-which-lossy-compression","tag-who-invented-lossy-compression","tag-why-is-lossy-compression-beneficial","tag-why-is-lossy-compression-beneficial-for-audio","tag-why-is-lossy-compression-suitable-for-a-video-clip","tag-why-is-lossy-compression-used-for-images","tag-why-lossy-compression-is-beneficial","tag-why-use-lossy-compression"],"yoast_head":"\nLossy Compression Part 3 - mp4gain.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mp4gain.com\/mp4gain\/lossy-compression-part-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lossy Compression Part 3 - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"Lossy Compression Part 3 MPEG-1 and MPEG-2 video compression formats As an initial step in image processing, the MPEG-1 and MPEG-2 compression formats divide the reference frames into several equal blocks, which are then subjected to a floppy cosine transform (DCT). 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