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(2012/01)!" # $ %& '( ) * +, - 0 1 "'./ ( ) BT

ii.. (IPR) (ITU-T/ITU-R/ISO/IEC).ITU-R 1 1 http://www.itu.int/itu-r/go/patents/en. (http://www.itu.int/publ/r-rec/en ) () ( ) BO BR BS BT F M P RA RS S SA SF SM SNG TF V 2012 :.ITU-R 1 ITU 2012..(ITU)

1 (2012) (HDTV). ( ITU-R BT.1683 ( ITU-R BT.710 ( ITU-R BT.709 ( 9 ( ITU-T J.342 (VQEG) ( 1 1.

2 1 (HDTV)..(RR).ITU-T BT.500.(PSNR) (RR).RR.. (/ / ) MPEG-2 ITU T H.264.( )... (ITU-T J.149 )..Mbit/s 30 1 :.1080 : 1080/59,94/I 1080/25/P 1080/50/I 1.1080/29,97/P 1 080 1 920 25 29,97 Mbit/s 30 720/P 2 : : 1 : ( ) 1080 SRC H.264/AVC (MPEG-4 Part 10) MPEG-2.(HRC) 720/P. 720/P HRCs 720/P

3 (PSNR) :.. (2...0,98 0,95 ( ).( ).(PSNR). ) 29,97 ).(.( 25........ (2008) ITU-T J.244. 1.1 (1 2.1 2 3 : :( ) 1.1.3. 1.3

4 :( ) 2.1.3. ( ). : 3.1.3 2.3 :. ( - ) :. : 2.2.3... : 3.2.3. (Absolute Category Rating) (ITU-R BT.500 (ITU-T P.910 (VQEG's Independent Laboratory Group) (VQEG) 1.2.3 : ) ).(Absolute Category Rating with Hidden Reference) (Audio Video Interleave) (Difference Mean Opinion Score) (Full Reference) (Full Reference TeleVision) (Hypothetical Reference Circuit) (Mean Opinion Score) (Mean Opinion Score, predicted) (No (or Zero) Reference) (Peak Signal-to-Noise Ratio) (Processed Video Sequence) (Root Mean Square Error) ( ) (Reduced Reference) (Source Frame Rate) (Source Reference Channel or Circuit) 4 ACR ACR-HR AVI DMOS FR FRTV HRC ILG MOS MOSp NR PSNR PVS RMSE RR SFR SRC

5 (Video Quality Experts Group) (Colour Space and file format) VQEG YUV 5. 6 (PSNR)..... 1 1..(VQEG) (HDTV) 1 1.6 BT.1908-01 1 56 kbit/s, 128 kbit/s, 256 kbit/s 56 kbit/s, 128 kbit/s, 256 kbit/s 1080/60 Hz (29.97 fps) 1080/30Pp (29.97 fps) 1080/25Pp (25 fps) 1080/50I Hz (25 fps)

6 (PSNR) (EPSNR) 2.6 1.2.6. (RR).. PSNR.... g vertical (m,n) g horizontal (m,n) : g( m, n). g( m, n) = g ( m, n) g ( m, n) horizontal +.. 3. 2. 6 2 4.2 g horizontal (m,n).2 g vertical (m,n) ( ) 6 ( ) 5.5 vertical

7 2 ( ) BT.1908-02 3 2 BT.1908-03

8 4 2 5 BT.1908-04 BT.1908-05

9 6 ( ) 5 BT.1908-06...( ). 7. 9 7. 8.2 g vertical (m,n) ( ) ( ) 9.7.8

10 7 2 BT.1908-07 8 ( ) 7 9 BT.1908-08 ( ) 8

11 BT.1908-09....(8 5 ).(9 6 ) ( ). t e " ".. (RR) (EPSNR RR).....( )... ( )... (VQEG HDTV).. 2.2.6

12 (EPSNR RR) LPF. (LPF) VQEG HDTV (3 7)... 2.(10 ). 2 29 8 21 1 032 1 856 1 080 1 920 28 8 20 516 1 856 540 1 920 10 1324 132 BT.1908-10 3.(1 ).

13 3 / kbit/s 256 kbit/s 128 kbit/s 56 211 105 46 109 54 24 11 / / ( X, Y).EPSNR VQM EPSNR BT.1908-11 / /. / / ITU-T J.244.ITU-T J.244 (B ).VQEG HDTV %30 (B ) - (PSNR ).. PSNR (y x ).db 2 VQEG HDTV...(13 ).(12 ). 3.2.6

14. 14. : (MSE) MSE window = 1 N win E SRC (i) MSE window N win E PVS (i).mse window.....(18 ) 12 ( E SRC ( i) E PVS ( i)) 2 BT.1908-12 13 SRC PVS BT.1885-15 BT.1908-13

15 14 SRC 1 2 3 4 PVS 1 2 3 4 15.(15 ).(8 6 4 2 ) ( ).. (7 5 3 ) 16. 15 BT.1908-14 SRC A B C D E F G H 1 2 3 4 5 6 7 8 PVS A A C C E E G G 1 2 3 4 5 6 7 8 BT.1908-15

16 16 SRC A B C D E F G H 1 2 3 4 5 6 7 8 PVS z z B B D D F F 1 2 3 4 5 6 7 8 BT.1908-16 17 PVS A B C D E F G H I 7 1 2 3 4 5 6 7 8 3 3 9 BT.1908-17 18 PVS A B C D E F G H I 1 2 3 4 5 6 7 8 9 BT.1908-18

17 (EPSNR).(MSE edge ) : ( PSNR ) EPSNR EPSNR EPSNR = 10log. p 4.2.6. I 8. : i Blk [i]=. 10 ( P 2 MSE edge ) (Blocking) (1 Blocking IF(BLOCKING > 12 and 25 EPSNR<30) IF(BLOCKING > 5 and 30 EPSNR<35) = 1 i adjust_epsnr_blk1=3 adjust_epsnr_blk1=5 Blk [ i] :. ( :(19 II ) ) MPEG2 (2 d h ( j, k) = AvgL AvgR : Avg R = 1 2 2 p= 1 Frame ( j + p, k) Avg L = 1 2 0 p= 1 Frame ( j + p, k )

18 (d h (j, k)) 19 (j+1, k) k Avg L k (j+1, k) Av g R d h ( j, k = Av g Avg ) L R j NFB h = 7 SB [ ] h j = 7 l= 1 1 k height : j BT.1908-19 (SB h ) ( Frame( j, k) Frame( j + 1, k) u( d ( j, k) Φ( Avg ))) ( s 127) 171 + 3 Φ ( s) = 3( s 127) /128+ 3 : 1 1 j width j l (mod8) (FB h ) h L : 2 127 2 u( ) FB h = SB j 0(mod8) h 1 j width ( j) 1 2 : (NFB h ) 1 k height 2 ( Frame( j, k) Frame( j + 1, k) u( d ( j, k) Φ( Avg ))). 1/ H : BLK = ln / BLK H ( FB NFB ) h h h L 2.BLK V : i. FrameBLK ( i) = 0.5 BLK H + 0. 5 BLK V. %10 (BLOCKING2)

19 : IF(BLOCKING2 > 1.5 and 25 EPSNR<30) IF(BLOCKING2 > 1.3 and 30 EPSNR<35) IF(BLOCKING2 > 1.5 and 35 EPSNR<40) IF(BLOCKING2 > 1 and 40 EPSNR<45) IF(BLOCKING2 > 0.5 and 45 EPSNR<55) adjust_epsnr_blk2=2 adjust_epsnr_blk2=2 adjust_epsnr_blk2=2 adjust_epsnr_blk2=2 adjust_epsnr_blk2=2. EPSNR..Φ(s) :. (3 IF(MAX_FREEZE 8 and 25 EPSNR<30) IF(MAX_FREEZE 6 and 30 EPSNR<35) IF(MAX_FREEZE 3 and 35 EPSNR<40) IF(MAX_FREEZE 1.5 and 40 EPSNR<45) IF(MAX_FREEZE 1 and 45 EPSNR<95) adjust_epsnr_max_freeze=3 adjust_epsnr_max_freeze=3 adjust_epsnr_max_freeze=3 adjust_epsnr_max_freeze=2 adjust_epsnr_max_freeze=2 10. MAX_FREEZE. IF(TOTAL_FREEZE 80 and 25 EPSNR<30) IF(TOTAL_FREEZE 40 and 30 EPSNR<35) IF(TOTAL_FREEZE 10 and 35 EPSNR<40) IF(TOTAL_FREEZE 2 and EPSNR 40) 10 : adjust_epsnr_total_freeze=3 adjust_epsnr_total _freeze=4 adjust_epsnr_total _freeze=3.5 adjust_epsnr_total _freeze=1.5.. TOTAL_FREEZE (4.. ( ). EPSNR.. (EPSNR_diff) EPSNR : EPSNR IF(8 EPSNR_diff 30 and 25 EPSNR< 30) adjust_epsnr_diff= 3 IF(9 EPSNR_diff 30 and 30 EPSNR< 35) adjust_epsnr_diff= 4 IF(10 EPSNR _diff 30 and 35 EPSNR< 40) adjust_epsnr_diff= 6 IF(9 EPSNR _diff < 10 and 35 EPSNR< 40) adjust_epsnr_diff= 2 IF(9 EPSNR _diff 30 and 40 EPSNR< 45) adjust_epsnr_diff= 4. 100

20 EPSNR (5 : EPSNR EPSNR <= EPSNR MAX(adjust_EPSNR_blk1,adjust_EPSNR_blk2,adjust_EPSNR_max_freeze, adjust_epsnr_total _freeze,adjust_epsnr_diff) (6. EPSNR EPSNR.EPSNR.20 (DMOS) 50 (VQEG HDTV).19 20 DMOS EPSNR Out L1 L2 U1 U2 In BT.1908-20

21 (VQEG) ( ) 1 (VQEG) I VQEG. 12 9..VQEG (RMSE) Pearson. ( ITU-T H.264 ) (PSNR).4 RR RMSE) "RMSE ". ITU-T J.340 ".( ) (6 0) " (6 0) "PSNR ".. Pearson "PSNR ".PSNR 4 Yonsei256k Yonsei128k Yonsei56k PSNR 0,73 0,73 0,73 0,71 RMSE 4 4 4 6 4 4 4 6 PSNR PSNR 0,77 0,77 0,77 0,78.kbit/s 56 (RR) (RMSE) 5 (MPEG-2 ITU-T H.264)..(Coding) (HRC) (Errors)

22. RMSE 5 Yonsei256k Yonsei128k Yonsei56k PSNR HRC 0,65 0,65 0,65 0,75 H,264 0,86 0,85 0,86 0,67 H,264 0,80 0,81 0,81 0,78 MPEG-2 0,68 0,68 0,68 0,66 MPEG-2 0,69 0,69 0,69 0,75 0,79 0,78 0,79 0,67 Recommendation ITU-T P.910 (2008), Subjective video quality assessment methods for multimedia applications. Recommendation ITU-T P.911 (1998), Subjective audiovisual quality assessment methods for multimedia applications. Recommendation ITU-T J.143 (2000), User requirements for objective perceptual video quality measurements in digital cable television. Recommendation ITU-R BT.500, Methodology for the subjective assessment of the quality of television pictures. Recommendation ITU-T J.340 (2010), Reference algorithm for computing peak signal to noise ratio of a processed video sequence with compensation for constant spatial shifts, constant temporal shift, and constant luminance gain and offset.