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1、ERRATA TO: Recipients of CEA-770.24, Standard Definition TV Analog Component Video Interface NOTE: Please replace page 5 with the page 5 enclosed. The original publication of CEA- 770.2-C showed incorrect values for and x in Table 7. The correct values, 10 and 16, respectively are included in the at
2、tached page 5. We are sorry for any inconvenience this may have caused. Sincerely, Technology and, (2) 480p video format defined by 480 active lines, 525 total lines, progressively scanned at 59.94 or 60 frames/second. Both video formats shall be capable of either 4:3 or 16:9 aspect ratios. Table 1
3、presents all the permissible scanning systems of this standard. A compliant interface shall implement one or more of these permissible scanning systems. Other scanning structures such as HDTV video formats are outside the scope of this standard (see EIA/CEA-770.3-B for HDTV scanning formats). The si
4、gnal characteristics are defined by a gamma-corrected component set: a luminance video and two accompanying color-difference signals, see SMPTE Standard 170M Section 5. The intended uses of this interface should be: a) For interconnection between Digital Television (DTV) Set top boxes and compatible
5、 television receivers or monitors; or b) For interconnection between DTV compatible Cable TV Set top boxes or Satellite DBS Receiver Decoders, and television receivers or monitors; or c) To interconnect equipment into complete, self-contained analog component systems of relatively small size. Table
6、1 Scanning Systems 2 References 2.1 Normative References The following references contain provisions, which, through reference in this text, constitute normative provisions of this standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parti
7、es to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated in Section 2.1 .I. 2.1.1 Normative Reference List ANSVSMPTE Standard 170M (1 994) (M/NTSC) for Television - Composite Analog Video Signal - NTSC for Stu
8、dio Applications 1 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- CEA-770.2-C ANSVSMPTE Standard 253M
9、(1 998), Standard for Television - Three-Channel RGB Analog Video I n te rface ANSVSMPTE Standard 293M (1996), Standard for Television 720 X 483 Active Line at 59.94 Hz Progressive Scan Production - Digital Representation NOTE-By permission from the Society of Motion Picture and Television Engineers
10、, sections of this standard are directly obtained from SMPTE Standards 253M and 293M. IEC 60169-8 (1978), Radio-frequency connectors, Part 8: R.F. coaxial connectors with inner diameter of outer conductor 6.5 mm (0.256 in) with bayonet lock - Characteristic impedance 50 ohms (type BNC); Amendment 2
11、(60169-8-am2-1997-1 I), Annex A (informative): Information for interface dimensions of 75 ohm characteristic impedance connector with unspecified reflection factor 2.1.2 Normative Reference Acquisition IEC Standards: 0 Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewoo
12、d, CO USA 801 12-5776; Phone 800-854-71 79; Fax 303-397-2740; Internet http:/; Email IEC Central Office, 3, rue de Varembe, PO Box 131, CH-121 1 Geneva 20, Switzerland; Phone +41 22 919 02 11; Fax +41 22 919 03 00; Internet http:/www.iec.ch; Email pubinforiec.ch 0 SMPTE Standards: 0 Society of Moti
13、on Picture Web: http:!lww.srnpte.org 2.1.3 Informative References 0 Society of Motion Picture and Television Engineers - ANSVSMPTE Standard 125M; Digital Component 4:2:2 Parallel Signals and Interface, Society of Motion Picture Web: http:/www.smpte.org EIA/CEA Standards: EIA/CEA-608-B, Line 21 Data
14、Service, Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 801 12-5776; Phone 800-854-7179; Fax 303-397-2740; Internet http:/; Email 0 3 Video Components 3.1 Black Level and Blanking Level Black level and blanking level shall be at O V as shown in Figure 1 a
15、nd Figure 4. The signal set on this interface has no setup, so black level and blanking level are the same. 3.2 Signals The three channels of the interface are designated to carry specific signals as shown in Table 2. YPBPR Component Set Channel 1 I Luminance Y Channel 2 I Scaled B-Y P B Channel 3 I
16、 Scaled R-Y P D Table 2 Channel Specification 3.3 Y, PB , PRComponent Set The component set (Y, PB, PR) is derived from positive-going primary color signals (R, G, B) which are positive-going, each having a peak level of 700 mV from blanking, with zero setup. This document was formerly designated as
17、 IEC 169-8. 1 2 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- C EA-770.24 As indicated in SMPTE 170M,
18、 the luminance (Y) and color difference (B-Y, R-Y) signals are first formulated according to the basic equations: Y = 0.299R + 0.587G + 0.1 14B B - Y = - 0.299R - 0.587G + 0.886B R - Y = 0.701R - 0.587G -0.114B These resulting three component video signals are additionally specified in Sections 3.3.
19、1, 3.3.2 and 3.3.3. 3.3.1 Luminance Y In the case where all the R, G and B primary video signals are 700 mv, the resulting luminance (Y) signal has a peak video amplitude of 700 mV from blanking level, with zero setup. A negative-going bi-level sync pulse of 300 mV, conforming to the timing requirem
20、ents of Section 7 and Figure 4, is added to the luminance signal as the only timing reference for the Y, PB, PR component set. 3.3.2 Color Difference Signal PB The PB signal shall be amplitude scaled B-Y according to: P B = (B-Y)/1.772 After such scaling, the PB signal shall have a maximum peak ampl
21、itude of & 350 mV about blanking level. The PB signal shall be a bipolar video signal and shall conform to the timing requirements of Figure 1. The dc level of PB during the clamp period shown in Figure 1 shall be at reference black with a voltage level of o v. 3.3.3 Color Difference Signal PR The P
22、R signal shall be amplitude scaled R-Y according to: P R = (R-Y)/1.402 After such scaling, the PR signal shall have a maximum peak amplitude of & 350 mV about blanking level. The PR shall be a bipolar video signal that conforms to the timing requirements of Figure 1. The dc level of PR during the cl
23、amp period shown in Figure 1 shall be at reference black with a voltage level of O V. 4 Impedance Equipment using this interface shall have nominal 75 ohm f 5% input and output impedance. 5 Clamping and Signal DC Content The clamp period shown in Figure 1 and Figure 4 may be used as a dc level clamp
24、 reference. The dc offset, as defined by the blanking level of the signal, shall be 0.0 V k 1 .O V. 6 Component Timing The three component video signals Y, PB, PR shall be coincident with respect to each other within k 5 ns. 7 Horizontal Blanking and Synchronization Each line outside the vertical bl
25、anking interval is divided into an active line period and a horizontal blanking interval. The horizontal blanking interval for the Y signal contains the negative-going horizontal sync pulse. The remainder of the horizontal blanking interval is at blanking level and may be used for signal dc clamping
26、. Horizontal timing for 480i shall be as given in Table 3 and as shown in Figure 4. Horizontal timing for 480p shall be as given in Table 4, and as shown in Figure 4. 3 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Ber
27、nie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- CEA-770.2-C Total line period (derived) Horizontal blanking rise time I Measurement I Value I Recommended I Units I points tolerance pS 10% - 90% 140 k 20 ns 63.556 _ Sync rise time I 10
28、% - 90% I140 I k20 ns Horizontal sync H-reference to clamp start Horizontal clamD Deriod 50% I 4.7 50% 1- 50% I 5.7 I 2.7 k 0.1 pS k 0.1 pS k 0.1 pS H-reference to H-blanking end I 50% I 9.2 I + 0.2, - 0.1 pS Total line period (derived) Horizontal blanking rise time Sync rise time H-blankina start t
29、o H-reference Measurement Value Recommended Units points tolerance 31.776 _ pS 10%-90% 70 k 10 ns 10%-90% 70 k 10 ns 50% .59 + 0.05 Il c I order to meet Derational reauirements in Dractical svctems. I Horizontal sync I 50% I 2.33 I kO.05 Table 4 480p Video Signal Horizontal Timing pS 8 Vertical Blan
30、king and Synchronization 8.1 480i Video Format For the 480i video format, each television frame (one complete scanning of the picture) is divided into two fields. The fields carry every other scan line in succession with succeeding fields carrying the lines not scanned by the previous field. I 50% I
31、 1.35 I kO.05 I ps I Horizontal clamp period Each field shall be divided into an active picture area and a vertical blanking interval. The vertical blanking interval for the Y luminance signal shall contain the vertical synchronizing information surrounded by blanking periods to properly position th
32、e vertical sync and by space allocated for special vertical interval signals (equalizing pulses), as specified in Table 5 and shown in Figure 2. I The vertical synchronization signal shall consist of a nine-line block, divided into three, three-line long segments. The first segment shall contain six
33、 pre-equalizing pulses. The second segment shall contain the vertical synchronizing pulse with six serrations provided to maintain horizontal synchronization. The third segment shall contain six post-equalizing pulses. Horizontal clamp period H-reference to H-blanking end The remainder of the vertic
34、al blanking interval not used for the nine-line vertical sync block shall be available for special vertical interval signals2. When such signals are carried on a particular line, the signals shall conform to the period between horizontal blanking intervals. When such signals are not carried on a par
35、ticular line, the line shall be maintained at blanking level. 50% 1.35 k 0.05 pS 50% 4.52 + 0.1, - 0.05 pS Line 10 is used for clamping and switching, and should not be used for data. 2 4 H-reference to H-blanking end I 50% I 4.52 I + 0.1, - 0.05 I ps Copyright Consumer Electronics Association Provi
36、ded by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- C EA-770.2-C Field period (derived) Frame period (derived) I Measurement I Value I Recommended I Units
37、points tolerance 16.6833 ms 33.3667 ms Frame period (derived) Vertical blanking* (31.776 ps x 45 lines + 5 9 ps) Vertical sync duration Vertical serration pulse width Notes 1 Some component equipment does not blank lines 20 and 282, resulting in 19-line (+ 1.5 ps) vertical blanking. 2 All pulse rise
38、 and fall times, unless otherwise specified, are to be 140 ns + 20 ns measured from 10% to 90%amplitude points. All pulses are measured at 50% amplitude points. 3 Line 21 is designated for other uses, including closed captioning. See EIACEA-608-B. Table 5 480i Video Signal Vertical Timing Measuremen
39、t Value Recommended Units points tolerance ms 16.6833 451ines O lines + 0.59 ps + 0.05 ps 6 lines 50% 2.33 + 0.05 ps 8.2 480p Video Format The 480p video format is progressively scanned from the top of the frame to bottom without skipping any lines. The frame shall be divided into an active picture
40、area and a vertical blanking interval. The vertical blanking interval for the Y luminance signal shall contain the vertical synchronizing information surrounded by blanking periods to properly position the vertical sync. The vertical timing shall be as in Table 6 and Table 7 and shown in Figure 3. D
41、uration in line intervals A B C D 9 6 30 45 Pulse width Line no. in sequence a - b a x 6 2.33 ps 1 7 13 45 to 90% amplitude points. Ail pulses are measuied at 50% amplitude points. Table 6 480p Video Signal Vertical Timing 5 Copyright Consumer Electronics Association Provided by IHS under license wi
42、th CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- CEA-770.2-C CH 1 9 Interface Characteristics 9.1 Cable Impedance and Channel Numbering Each of the three signals shall be carried
43、on an unbalanced coaxial cable with a nominal impedance of 75 ohms. The channel numbering and signal shall be Chl: Y, Ch2: PB, and Ch3: PR. 9.2 Signal Source and Termination Impedance Signal sources shall have an unbalanced output circuit with a source impedance of 75 ohms f 5%. Inputs shall have a
44、load impedance of 75 ohms f 5%. The return loss shall be at least 25 dB. These values are specified over a frequency range of 1 O0 kHz to 15 MHz. 9.3 Signal Amplitude Signal amplitudes shall conform to Section 3. 9.4 Time Coincidence Any pair of signals in the set shall be time coincident with respe
45、ct to each other k 5 ns when used in a component system. 10 Connector and Cable Two different connectors are permissible under this standard. The preferred implementation incorporates a cable and connector arrangement for each of the three parallel signals. 10.1 Connector The primary connector, inte
46、nded for consumer video products, shall be the RCA-type Phono connector (plug and jack). The secondary connector, intended for professional video products, shall be the 75-ohm BNC. For further information, see IEC 60169-8-am2-1997-11. The connector color code shall be shown as in Table 8. Y Green I
47、ChannelNumber I Signal Assignment I Connector Color Code I CH2 P B Blue Table 8 Connector Color Code 10.2 Cables The recommended cable shall consist of three individual, insulated coaxial cables, each housed in a nonmetallic jacket. 6 Copyright Consumer Electronics Association Provided by IHS under
48、license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,-,- C EA-770.24 - - - +350 O -350 CLAMP PERIOD SYNC PERIOD Time Figure 1 Y, PB, PR Component Set (100/0/100/0 Color Bar Example) 7 Copyright Consumer Electronics Association Provided by IHS under license with CEA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 21:02:10 MDTNo reproduction or networking permitted without license from IHS -,