MultimediaWiki - Recent changes [en]

Mirrored Files

2013-05-27T00:31:55Z

update mirrored DCA spec

Revision as of 00:31, 27 May 2013		Current revision
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	** mirror (DTS patent application, scans, 550 pages, 54 MB PDF): http://multimedia.cx/mirror/EP864146-53.pdf		** mirror (DTS patent application, scans, 550 pages, 54 MB PDF): http://multimedia.cx/mirror/EP864146-53.pdf
	** mirror (DCA transform): http://multimedia.cx/mirror/dca-transform.pdf		** mirror (DCA transform): http://multimedia.cx/mirror/dca-transform.pdf
-	** Specification v1.3.1, 2011-08-09: http://multimedia.cx/mirror/ts_102114v010301p.pdf	+	** Specification v1.4.1, 2012-09: http://multimedia.cx/mirror/ts_102114v010401p.pdf

	* [[H264]] draft specification, marked 2002 (E):		* [[H264]] draft specification, marked 2002 (E):

Canopus Lossless

2013-05-24T05:30:01Z

Revision as of 05:30, 24 May 2013		Current revision
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
	[[Category:Lossless Video Codecs]]		[[Category:Lossless Video Codecs]]
		+	[[Category:Intermediate Video Codecs]]

Canopus HQ

2013-05-24T05:29:52Z

Revision as of 05:29, 24 May 2013		Current revision
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	[[Category:Undiscovered Video Codecs]]		[[Category:Undiscovered Video Codecs]]
	[[Category:Video Codecs]]		[[Category:Video Codecs]]
		+	[[Category:Intermediate Video Codecs]]

Apple ProRes

2013-05-24T05:29:04Z

/* Alpha plane coding */

Revision as of 05:29, 24 May 2013		Current revision
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
		+	[[Category:Intermediate Video Codecs]]

AJA Kona 10-bit RGB Codec

2013-05-24T05:28:39Z

Revision as of 05:28, 24 May 2013		Current revision
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
		+	[[Category:Intermediate Video Codecs]]

Category:Intermediate Video Codecs

2013-05-24T05:27:35Z

New page

Intermediate video codecs are used mostly for storage of raw material, editing and such. Usually it is intra-only codecs with simple compression.

Apple Intermediate Codec

2013-05-24T05:25:51Z

/* Chroma extension scan */

Revision as of 05:25, 24 May 2013		Current revision
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
		+	[[Category:Intermediate Video Codecs]]

SheerVideo

2013-05-24T04:57:37Z

/* Frame Format */

Revision as of 04:57, 24 May 2013		Current revision
Line 90:		Line 90:
	9-15 'BitJazz'		9-15 'BitJazz'
	16-19 colour format (e.g. ' RGB')		16-19 colour format (e.g. ' RGB')
		+
		+	Coding principle is quite easy — every line is transferred as raw or delta-coded with static codes. There is a dozen of different double codesets depending on input format, different components can be coded with the first or the second VLC in the set (that also depends on the format, e.g. luma may be coded with one table, chroma with the other).
		+
		+	mask = (1 << bits_per_component) - 1;
		+	if (get_bit()) {
		+	for (x = 0; x < width; x++)
		+	for (i = 0; i < components; i++)
		+	line[0][x][i] = get_bits(bits_per_component);
		+	} else {
		+	for (i = 0; i < components; i++)
		+	pred[i] = pred_for_this_format[i];
		+	for (x = 0; x < width; x++)
		+	for (i = 0; i < components; i++)
		+	line[0][x][i] = pred[i] = (pred[i] + get_vlc(vlc_set[format][i])) & mask;
		+	}
		+	for (y = 1; y < height; y++) {
		+	if (get_bit()) {
		+	for (x = 0; x < width; x++)
		+	for (i = 0; i < components; i++)
		+	line[0][x][i] = get_bits(bits_per_component);
		+	} else {
		+	for (i = 0; i < components; i++)
		+	pred_TL[i] = pred_L[i] = line[y - 1][0][i];
		+	for (x = 0; x < width; x++) {
		+	for (i = 0; i < components; i++) {
		+	pred_T[i] = line[y - 1][x][i];
		+	pix = (3 * pred_T[i] + 3 * pred_L[i] - 2 * pred_TL[i]) >> 2;
		+	pix = (pix + get_vlc(vlc_set[format][i])) & mask;
		+	line[y][x][i] = pix;
		+	pred_L[i] = pix;
		+	pred_TL[i] = pred_T[i];
		+	}
		+	}
		+	}
		+	}

	[[Category:Video Codecs]]		[[Category:Video Codecs]]
-	[[Category:Undiscovered Video Codecs]]	+	[[Category:Incomplete Video Codecs]]
	[[Category:Lossless Video Codecs]]		[[Category:Lossless Video Codecs]]