IP-, VoD PVR , , IPTV-. , . 1.2.
1.2
( ) | /, | , / | |||
subQSIF (12896) QSIF (160120), QIF (176144) 4:3 (4:2:0) | 1-5, | 1 - | .261, .263, .264, MPEG-4; G729, G723.1 . | 9128 / | |
- | QSIF, QIF, SIF (320240), CIF (352288) 4:3 (4:2:0) | 5-30, | 1 | .261, .263, .264, MPEG-4; G729, G728 MPEG-1, MPEG-2, MPEG-4 G723.1 | 0,0321,5 / |
, | SIF, CIP 4:3 (4:2:0) | 30/25, | 1 1 | MPEG-1, MPEG-2, MPEG-4 | 0,71,5 / |
640:480 (NTSC) 4:3 (4:2:0, 4:2:2) | 30/25, | 1 +2 | MPEG-2, MPEG-4 | 220 / | |
720576 (PAL, SECAM); 4:3 (4:2:0, 4:2:2) | |||||
1280720; 16:9 (4:2:0, 4:2:2) | 25/30/50/60, | 1 2 | MPEG-2, MPEG-4 | 840 / | |
19201080; 16:9 (4:2:2) | 25/30, | - 2 | MPEG-2, MPEG-4 | 1660 / | |
, 1 | 38402160; 16:9 (4:2:2) | 25/30/50/60, 60 | - | MPEG-4 | 6080 / |
, 2...20 /. ? 2 / IPTV- MPEG-4. 20 / MPEG-2, . , -. , (/) MPEG-2 7 /.
MPEG-2, MPEG-4 ( , MPEG-4AVC, Advanced Video Coding Part 10, H.264) Microsoft VC-1 (windows media video). . 1.2 , /, .1.3.
|
|
1.3
, \ | |||
MPEG-4 | 3,5 | ||
VC-1 | 3,5 | ||
MPEG-2 |
, .. - , , . , 4-5 , . 2530 %.
, , .1.4.
1.4
IPTV- | |||
MPEG-4 | |||
MPEG-2 | |||
VC-1 |
IPTV, .. , .
QoS . IP- 75...80 %, (, .. ).
, - 40 MPEG-2 ( IPTV MPEG-2), , 190 /, 230 /.
() VoD, 7 /, HDTV MPEG-2 15 /.
, , , .
, , . , - MPEG-4.
2. | - IPTV |