ITU-R BT.439- ITU-R BT.439- (26-2). ( ( ( ITU-T J.6 ( ITU-T J.6 ( ( 2 2 2 3
ITU-R BT.439-2 4 3 4 K : 5. ITU-R BT.24 :. ITU-T J.6. : T u ( ) () (S + L = M) :A :B :C : D :E :F :G :H :J :K :L :M :S :Tsy :Tlb :Tu :Tb :Tfp :Tbp
3 ITU-R BT.439- F E D C B. M S L.L J H G.L U(t) ( ) C (APL) T lb T u G G T fp T sy T bp F T b H M L B C D E F G J K S A t 439- Z. Z 2.2 2.2 : Z Z 2 log Z + Z( f ) Z Z( f ) db : 2 log A A2 db
ITU-R BT.439-4. A 2 A.. B. ) A..(.( M) 2.3..3 (db).. 3.2 4.2 3.3 2.3.2.3 (db). r.m.s. L L (db). r.m.s.. (db) L.kHz Hz 5 2.2.3
5 ITU-R BT.439-3.2.3 (db). L khz. 4.2.3 (db). L :. APL - ( D) -.( G) -...... 3.3 (2.3.3 ) (.3.3 ) (..3.3 ) ( ) (4..3.3 ) (2..3.3 ) ( ) (3..3.3 ) (2..3.3 ) ( ) (3..3.3 )
ITU-R BT.439-6. APL. APL...3.3..3.3 APL. 2..3.3 APL. APL. 3..3.3. APL. APL 4..3.3. APL.2.3.3 ( S) APL. 2.3.3
7 ITU-R BT.439-2.2.3.3 APL. APL... APL... 4.3 (3.4.3 ) (2.4.3 ) / (.4.4.3 ) / (2.4.4.3 ) (.3.4.3 ) (2.3.4.3 ) (.4.3 ) (..4.3 ) (2..4.3 ) (3..4.3 ) (4..4.3 ) 439-b. ( ) ( ).( ) ( ).4.3
ITU-R BT.439-8...4.3 APL.. 2..4.3.. 3..4.3.. 4..4.3 ( ). ( ) ) f c ( ).(ITU-R BT.7. 2.4.3 3.4.3.3.4.3. 2.3.4.3.
9 ITU-R BT.439- /.4.4.3. / 2.4.4.3.. / ( ) 4.4.3 2...%5 APL..APL. APL 2.4.3 2.3......F B 3 B 2 B A..dB 3 2.2 2.2
ITU-R BT.439-..dB 3 f c - db 4.f c.. 3.2 L. 525 B 3 B 2 625 B 3.(2 b ) (2 b 2 ). 2 3.3 b 2 L b 439-2.2.3.r.m.s....... 2.3
ITU-R BT.439- (2 2 ).. khz 2. db 2.( 2 3 )..2 2....2 2.. ). 9 2.2.3 3.2.3 4.2.3. 3.3.3.3..3.3 (D) 5.((sin 2 ) 2 4.
ITU-R BT.439-2 : 3 = i.4 (G2) 3 = i 2..3.3 3 Ai ki A2 ki A2 ( 3 ) G2 G 625 G2 2i 3 2 i 2 :A :i = ki :. 525 G = ki. -.. ( ).G2 G. 3..3.3 9 D2.. ( ) %y %x+.. y x : (%) x = Amax A y = Amin A : x + y = Amax Amin A
3 ITU-R BT.439- :A.( ) 5 ( ) :A ( ) ( ) -y +x. y x. : ( ) x = Φ max Φ y = Φ min Φ : x + y = Φ max Φ min.( ) 5 ( ) :Φ :Φ : 4..3.3. G2 G G - (4 3 b 5 ) G2 G G (4 3 b 6 ). 2.3.3.2.3.3.APL 3/7 ). ( 525 4/ 625.. 4.3.4.3..4.3..
ITU-R BT.439-4 : ( ) - -.(s/%) - 2..4.3.( 4 3 (A )..( ) µs 25.b4 525. 3..4.3 (6 ) B2 B3 625 (5 ) B3. 525.µs. : ( ) ( 625 ) ns 4 - ( 525 ) ns 5 -...2 5 ( ) -. 4..4.3 525 B2 B3 625 B3.6 5 B B3 B2 )..( 6 5. K K.4 S 525..K
5 ITU-R BT.439-2.4.3.2.4.3.G2 G G B2.F B2 F G2 G G G B2.. 525. F ns.f 2.2.4.3. 3.4.3.3.4.3.8 7 C / 2.3.4.3. /.. ITU-T J.63.ITU-T J.63 ( B ).( 4 ) B3 A NTSC PAL -. (B-Y)
ITU-R BT.439-6 NTSC M/PAL () 8 ± 9 ± 8 ± 8 ± 8 ±. PAL 6 ± 5 6 ± 5 6 ± 5 ITU-T BT.7 D2 F G APL - 2.( ) 282 9 NTSC 285 22 625 337 24 ().M/PAL 3 625 A. -
7 ITU-R BT.439- ( 4 525 A IRE. - ( 4 525 (/ T ) IRE ( )
ITU-R BT.439-8 5FIGURE 5 Signal 625 B for 625-line Bsystems B Signal B Signal B2 B2 Signal B3 B3 V..93 µs 24 µs/26 µs % 9 sin 2.65 5.37.3 : Half-amplitude duration: 2T 2T : 2T Time of rise: approximately 2T : 2T Time of rise: approximately 2T ns 83 = T - - MHz 6 -.ns = T MHz 5 MHz 6 Note For 6 MHz video bandwidth T = 83 ns, for 5 MHz video bandwidth T = ns.. ns B3 B2 Note 2 In France, the normal time of rise of B2 and B3 is approximately ns. Note 3 For 6 MHz contries the rise time of B2 is equal to T..T B2 FIGURE 6 6 Signal 525B for 525-line systems B 2 3 439-5 Signal B B Signal B2 B2 B3 Signal B3 IRE scale units IRE 9 36 H 28 25 µs sin 2 5 : Half-amplitude duration: ns 25 25 ns : ns 25 Time of rise: approximately 25 ns : ns 25 Time of rise: approximately 25 ns 439-6
9 ITU-R BT.439- FIGURE 7 7 Signal 625 C for 625-line systems C V.86 C C2 % 8.65.5 MHz. MHz 2. MHz 4. MHz 4.8 MHz 5.8 MHz 5.44 2.3 4 8 2 8 24 3 36 42 48 5 µs. MHz 2,8 MHz,5 - Note Some former OIRT countries use.5 MHz and 2.8 MHz for the 2 nd and 3 rd bursts respectively. 439-7 FIGURE 8 8 Signal C 525 for 525-line systems C IRE scale units IRE C C2 75 5.5 MHz. MHz 2. MHz 3. MHz 3.58 MHz 4.2 MHz 25 8 2 24 32 4 48 56 64 H 28 439-8
ITU-R BT.439-2 V. FIGURE 9 9 Signal D 625 for 625-line systems D D Signal D %.86 8.72 6.58 4.44 2.3 V.4 4 8 2 6 2 26 µs ( a) D2 Signal D2 % 2..86 8.72.58 f = 4.43 MHz 6 4.44 2.3.6 2 4 8 22 26 3 32 ( b) µs -.µs 8,66 Note In full-field test signals, each tread of the staircase may have a duration of 8.66 µs. 439-9
2 ITU-R BT.439- FIGURE IRE IRE scale units D Signal D Signal D for 525-line systems IRE 525 D IRE scale units 8 D2 Signal D2 f = 3.58 MHz 72 9 IRE 4 IRE units 7 8 6 54 6 4 36 4 2 8 2 2 8 4 2 ( 26 32 4 H 28 (IRE ) a) ( 38 ( 8 4 2 26 32 4 H 28.IRE 2± 2 Note Vertical scales give signal amplitudes. In Fig. b), the tread levels (IRE units) are indicaded on the dashed line. Note 2 Sub-carrier amplitude is ±2 IRE units.. - b) -. FIGURE Signal F for 625-line systems 625 F 439- V %. sin 2.65 : Half-amplitude µs 2. duration: 2. µs 5 f = 4.43 MHz.3 439-
ITU-R BT.439-22 525 F 2 FIGURE 2 Signal F for 525-line systems IRE scale units IRE sin 2 5 : Half-amplitude duration: µs,57.57 µs f = 3.58 MHz 439-2 3 FIGURE 3 Signal 625 G for 625-line Gsystems V. G Signal G Signal G2 G2 % V. %.65.86 f = 4.43 MHz b 5 b 6 f = 4.43 MHz.72 b 5 5.65 b 6.58 8 6 5 4.44 2.3 9.3 9 2 3 6 2 µs 2 6 3 6 2 µs 439-3
23 ITU-R BT.439- IRE scale units IRE 9 FIGURE 4 4 Signal 525G for 525-line systems G 7 6 5 4 3 f = 3.58 MHz b 5 b 6 34 4 2 2 26 32 36 H 28 439-4 2 FIGURE 5 5 Low-pass filter diagram L L2 L3 f f 2 f 3 75 Ω C C2 C3 75 Ω C4 C5 C6 C7 439-5
ITU-R BT.439-24 2 3 (MHz 5 = fc) 545 39 428 563 463 259 2.88.54.72 9.48 f 5.56 f2 6.45 f3.mhz pf µη - - 2.%2 ± - 3..25 8 MHz 5 Q - 4 C C2 C3 C4 C5 C6 C7 L L2 L3 5 6 FIGURE 6 Low-pass filter characteristic (db) Relative insertion loss (db) 4 3 2 2 3 4 5 6 Frequency (MHz) (MHz) 439-6
25 ITU-R BT.439- (khz = fc).. 2 FIGURE 7 7 Combined filter design diagram A C C2 B 75 Ω L L2 75 Ω L3 L4 C C3 C4 75 Ω A: input B: high-pass output C: low-pass output :A :B :C 439-7 39 C ±5% 96 C2 335 C3 8 2 C4.757 L ±2% 3.2 L2.83 L3.29 L4.pF.mH - Q - 2.kHz
ITU-R BT.439-26 8FIGURE 8 Combined filter characteristic 6 5 (db) Insertion loss (db) 4 3 2 2 5 2 5 Frequency (MHz) (khz) 439-8 3.3 FIGURE 9 9 Network diagram L R L = Z τ τ C = Z R = a Z Z = 75 Ω Z R2 Z Z = 75 Ω R 2 = Z a C 439-9
27 ITU-R BT.439- A 2.3 2 + + ϖ τ log a A = 2 + ϖ τ a A 2 log ( + a) (A 4.8 db) db : : ns 245 = τ 4,5 = a FIGURE 2 2 Unified weighting characteristic 2 4 6 A (db) 8 2 4 6 2 3 4 5 f (MHz) 439-2 db 2,2 : MHz 5 db 7,4 : 3.3. 4
ITU-R BT.439-28 FIGURE 2 2 Non-constant resistance network diagram.4 24.56 µh Input.9 µh 6 265 pf f 3 Output f 75 Ω 428.3 pf 75 Ω 75 Ω 75 Ω 35.23 µh (R <.5 Ω) f 2 99 pf 47 pf 8 35 pf f = 6. khz f 2 = 6. khz f 3 = 55.8 khz - Note Capacitor and resistor tolerances ±%..%±. - 2 Note 2 Each inductor should be adjusted to resonate at the appropriate indicated frequency. 3. Ω 75 - Note 3 This network requires to be operated between 75 Ω terminations for correct performance. 439-2 22 FIGURE 22 Constant resistance network diagram 2.4 Input.2 µh 6 26 pf 33.55 µh 6.25 µh Output 3 649 pf 2. µh 75 Ω 75 Ω 75 Ω 66.6 Ω 62 Ω 3.8 µh 75 Ω 35.25 µh 989 pf 27.85 µh 2 87 pf 4 8 pf 3 47 pf Q %2± -.%± Note Capacitor and inductor tolerances ±2%, resistor tolerance ±%. The Q-factor of each inductor should be equal to, or greater than, 8 at MHz..MHz 8 439-22
29 ITU-R BT.439-3.4 FIGURE 23 23 Transient response of the network.6.5.4 Output voltage (V) (V).3.2...2 2 3 4 5 (µs) Time (µs) 439-23 5 FIGURE 24 24 Thomson filter diagram L L3 L4 75 Ω C3 C L2 C4 C5 75 Ω C2 439-24
ITU-R BT.439-3.pF Phillips, Proc. IEE, (f = 3.3 MHz) 47.7 444 4.6 57 3.5 2.948.5752./ C C2 C3 C4 C5 L L2 - µh - : - f 2 3.Vol. 5B, p. 44 3. 26 25..ITU-T J.63 FIGURE 25 25 Line 7 for 625-line systems 625 7 V. B2 b 3 b 2 b 4 B F D %.86 8.72 6.58 4.44 2.3 b 6.5 8.5.5 H 6 3 6 8 2 22 24 26 28 3 32 32 43 439-25
3 ITU-R BT.439-26 FIGURE 26 Line 525 7/field for 525-line /7 systems IRE scale IRE units 9 B2 b 3 b 2 b 4 B F D2 b 2 4 (O H ) 24 H/28 2 34 58 98 H 8 36 44 5 6 68 74 8 86 92 4 28 (O HR ) 439-26 4 K - K. 2 4..4.3 : K -. -. T sin 2 K..
ITU-R BT.439-32 K 2. 3..(B3 B2) (B) 2T sin 2. /2 F c = T T..( F c ) ns 8±.K (2T) ( 27 ( 27 K± ns 4± K2± ns 2± :( 27 ( 27 K (2T) = 3% : K (P/B) 2T 2.2 K4± ( 27.( 27 /2T (P/B) B K( P / B) = % 4 P T 2.2 /2T - 2T.. T 3.2 (MHz 6 = f c ( 27 ( 625) B ns 67 MHz 5 = f c ns 2 = 2T : ) % %3± %6± %2± %2± %6± %3± 8T 4T 2T 2T 4T 8T ns
33 ITU-R BT.439- ( 525) B (ns 25 ( 27 : ) % %3± %6± %2± %2± %6± %3± 5 25 25 5 ns T T...(,82 y ) y. : K (T). B K( T ) = y 4 P.K (T). 3K (T) ( ). T...K : : [½ B(rT ) =... B r,... B, B, B +,... B + r,... ½] B(rT) = B C(rT) =... C r,... C, C, C +,... C + r,... 3
ITU-R BT.439-34 Cr = Br + Br + Br+ 2 2 : : K 8 C r r C K Cr C for 8 r 2 and + 2 r + 8 for r 8 and r + 8 : 8 2 = 4 + K B r C 8 8 3 = 6 + K B r 8 = + 8 K 4 2 8 B r K (2T) K.2T C(rT) K3. K (P/B) 2T K2. - K4. K (T) 6..