1、 CEA Standard Standard Definition TV Analog Component Video Interface CEA-770.2-D R-2012 April 2007 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturer
2、s and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect preclu
3、de any member or nonmember of CEA from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members, wh
4、ether the standard is to be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner,
5、nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or other technical publication. This document does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this document
6、 to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. This document is copyrighted by the Consumer Electronics Association (CEA) and may not be reproduced, in whole or part, without written permission. Federal copyright law
7、 prohibits unauthorized reproduction of this document by any means. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement. Requests to reproduce text, data, charts, figures or other material should be made to CEA. (Formulated under the cogni
8、zance of the CEA R4.8 DTV Interface Subcommittee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2012 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 aspe
9、ct ratios. Table 1 presents all the permissible scanning systems of CEA-770.2-D. 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 CEA-770.2-D (see CEA-770.3-C for HDTV scanning forma
10、ts). The signal 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
11、 compatible 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 s
12、ize. CEA-770.2-D applies to signals carried on the connectors described in Section 10 and may or may not apply to component signals carried on other types of connectors. Table 1 Scanning Systems Pixels per active line Active lines per frame Frame Rate (Hz) Scanning Format Total samples per line Tota
13、l lines per frame 1 704 480 30 Interlaced 858 525 2 704 480 30/1.001 Interlaced 858 525 3 720 480 30 Interlaced 858 525 4 720 480 30/1.001 Interlaced 858 525 5 704 480 60 Progressive 858 525 6 704 480 60/1.001 Progressive 858 525 7 720 480 60 Progressive 858 525 8 720 480 60/1.001 Progressive 858 52
14、5 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 parties to agreements
15、based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated in Section 2.1.1. 2.1.1 Normative Reference List ANSI/SMPTE Standard 170M (2004), Standard for Television Composite Analog Video Signal NTSC for Studio Applications CEA-
16、770.2-D R-2012 2 ANSI/SMPTE Standard 253M (1998), Standard for Television - Three-Channel RGB Analog Video Interface ANSI/SMPTE Standard 293M (2003), Standard for Television - 720 X 483 Active Line at 59.94 Hz Progressive Scan Production Digital Representation NOTEBy permission from the Society of M
17、otion Picture and Television Engineers, some sections of CEA-770.2-D are directly obtained from SMPTE Standards 253M and 293Mothers are modified as noted. IEC 61169-8 Ed.1.0 (2007), Radio-frequency connectors, Part 8: R.F. coaxial connectors with inner diameter of outer conductor 6.5 mm (0.256 in) w
18、ith bayonet lock - Characteristic impedance 50 ohms (type BNC); 2.1.2 Normative Reference Acquisition IEC Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Web: http:/; Email IEC Central Office, 3,
19、 rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland; Phone +41 22 919 02 11; Fax +41 22 919 03 00; Web: http:/www.iec.ch; Email pubinforiec.ch SMPTE Standards: Society of Motion Picture Phone: 914-761-1100 Fax: 914-761-3115, Email: engsmpte.org; Web: http:/www.smpte.org 2.2 Informative Refer
20、ences ANSI/SMPTE Standard 125M (1995); Component Video Signal 4:2:2 Bit-Parallel Digital Interface CEA-608-C, Line 21 Data Service, August 2005 CEA-805-C, Data on the Component Video Interface, July 2006 2.2.1 Informative Reference Acquisition SMPTE Standards: Society of Motion Picture Web: http:/ww
21、w.smpte.org CEA Standards: Global Engineering Documents, World Headquarters, 15 Inverness Way East, Englewood, CO USA 80112-5776; Phone 800-854-7179; Fax 303-397-2740; Web: http:/ ; Email 3 Video Components 3.1 Black Level and Blanking Level Black level and blanking level shall be at 0 V as shown i
22、n Figure 1 and 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. CEA-770.2-D R-2012 3 Table 2 Channel Specification YPBPR Component Set
23、 Channel 1 Luminance Y Channel 2 Scaled B-Y PB Channel 3 Scaled R-Y PR 3.3 Y, PB , PR Component 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. As indicated i
24、n SMPTE 170M, the luminance (Y) and color difference (B-Y, R-Y) signals are first formulated according to the basic equations: Y = 0.299R + 0.587G + 0.114B 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
25、Sections 3.3.1, 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 ti
26、ming requirements 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: PB = (B-Y)/1.772 After such scaling, the PB signal shall have a maxim
27、um peak amplitude 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 0 V. 3.3.3 Color Difference Signa
28、l PR The PR signal shall be amplitude scaled R-Y according to: PR = (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
29、 the clamp period shown in Figure 1 shall be at reference black with a voltage level of 0 V. 4 Impedance Equipment using this interface shall have nominal 75 ohm 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
30、clamp reference. CEA-770.2-D R-2012 4 The dc offset, as defined by the blanking level of the signal, shall be 0.0 V 1.0 V. 6 Component Timing The three component video signals Y, PB, PR shall be coincident with respect to each other within 5 ns. 7 Horizontal Blanking and Synchronization Each line ou
31、tside the vertical blanking 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 f
32、or signal dc clamping. 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. Table 3 480i Video Signal Horizontal Timing Measurement points Value Recommended tolerance Units Total line peri
33、od (derived) 63.556 - s Horizontal blanking rise time 10% - 90% 140 20 ns Sync rise time 10% - 90% 140 20 ns H-blanking start to H-reference 50% 1.5 0.1 s Horizontal sync 50% 4.7 0.1 s H-reference to clamp start 50% 5.7 0.1 s Horizontal clamp period 50% 2.7 0.1 s H-reference to H-blanking end 50% 9.
34、2 + 0.2, 0.1 s Note-It is recognized that horizontal blanking operating values may vary from the precise values given in order to meet operational requirements in practical systems and to ensure that an encoded output signal meets that in ANSI/SMPTE Standard 170M (M/NTSC). Table 4 480p Video Signal
35、Horizontal Timing Measurement points Value Recommended tolerance Units Total line period (derived) 31.776 - s Horizontal blanking rise time 10%-90% 70 10 ns Sync rise time 10%-90% 70 10 ns H-blanking start to H-reference 50% .59 0.05 s Horizontal sync 50% 2.33 0.05 s H-reference to clamp start 50% 2
36、.85 0.05 s Horizontal clamp period 50% 1.35 0.05 s H-reference to H-blanking end 50% 4.52 + 0.1, 0.05 s Note-It is recognized that horizontal blanking operating values may vary from the precise values given in order to meet operational requirements in practical systems. 8 Vertical Blanking and Synch
37、ronization 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. CEA-770.2-D R-2012 5
38、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 the vertical sync and by space allocated for sp
39、ecial vertical interval signals (equalizing pulses), as specified in Table 5 and shown in Figure 2. The vertical synchronization signal shall consist of a nine-line block, divided into three, three-line long segments. The first segment shall contain six pre-equalizing pulses. The second segment shal
40、l contain the vertical synchronizing pulse with six serrations provided to maintain horizontal synchronization. The third segment shall contain six post-equalizing pulses. The remainder of the vertical blanking interval not used for the nine-line vertical sync block shall be available for special ve
41、rtical interval signals.1 Data signaling in the remainder of the vertical blanking interval may be accomplished by referring to CEA-805-C or other applicable standards. When such signals are carried on a particular line, the signals shall conform to the period between horizontal blanking intervals.
42、When such signals are not carried on a particular line, the line shall be maintained at blanking level. Table 5 480i Video Signal Vertical Timing Measurement points Value Recommended tolerance Units Field period (derived) 16.6833 ms Frame period (derived) 33.3667 ms Vertical blanking start before fi
43、rst equalizing pulse 50% 1.5 0.1 s Vertical blanking3 (63.556 s x 20 lines + 1.5 s) (approx. value, see notes) 20 lines plus 1.5 s 0 0.1 lines s Pre-equalizing duration 3 lines Pre-equalizing pulse width 50% 2.3 0.1 s Vertical sync duration 3 lines Vertical serration pulse width 50% 4.7 0.1 s Post-e
44、qualizing duration 3 lines Post-equalizing pulse width 50% 2.3 0.1 s Notes 1 Some component equipment does not blank lines 20 and 282, resulting in 19-line ( 1.5 s) vertical blanking. 2 All pulse rise and fall times, unless otherwise specified, are to be 140 ns 20 ns measured from 10% to 90% amplitu
45、de points. All pulses are measured at 50% amplitude points. 3 Line 21 is designated for other uses, including closed captioning. See CEA-608-C. 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 divi
46、ded 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 the vertical sync. The vertical timing shall be as in Table 6 and Table
47、 7, and shown in Figure 3. Vertical interval data signaling is accomplished in a manner similar to that used for 480i. See Section 8.1. 1 Line 10 is used for clamping and switching, and should not be used for data. CEA-770.2-D R-2012 6 Table 6 480p Video Signal Vertical Timing Measurement points Val
48、ue Recommended tolerance Units Frame period (derived) 16.6833 ms Vertical blanking* (31.776 s x 45 lines + .59 s) 45lines + 0.59 s 0 0.05 lines s Vertical sync duration 6 lines Vertical serration pulse width 50% 2.33 0.05 s Notes 1 All pulse rise and fall times, unless otherwise specified, are to be
49、 70 ns 10 ns measured from 10% to 90% amplitude points. All pulses are measured at 50% amplitude points. Table 7 Other 480p Vertical Timing Parameters (See Figure 3) Duration in line intervals Pulse width Line no. in sequence A B C D a - b 9 6 30 45 2.33 s 523 7 13 42 NOTEThese values have been adjusted to reflect the difference between 480 and 483 lines of active video. 9 Inter
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