1、SMPTE RP*9b 93 CI 8357403 O000607 332 E SMPTE RECOMMENDED PRACTICE Specifications for Subjective Reference Tapes for Helical-Scan Video Tape Reproducers for Checking Receiver/Monitor Set up RP 96-1 993 Revision of RP 96-1988 1 scope This practice specifies magnetic video reference tapes for subjecti
2、ve evaluation of receiver or monitor setup and overall performance of video and audio derived from 3/4-in type E and 1/2-in types G and H magnetic helical-scan tape reproducers. No test instruments are required. 2 Normative references The following standards contain provisions which, through referen
3、ce in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this practice are encouraged to investigate the possibility of applying the most recent edition of the sta
4、ndards indicated Mow. ANSI/SMPTE 21M-1986 (R1 Wl), Video Recording - 3/4-in Type E Helical Scan - Records ANSVSMPTE 22M-1986 (R1991), Video Recording - 3/4-in Type E Helical Scan - Cassette ANSVSMPTE 32M-1993, Video Recording - 1/2-in Type H - Cassette, Tape and Records ANSVSMPTE 35M-1991 , Televisi
5、on Analog Recording - 1/2-in Type G - Cassette and Tape EIA 189-A, Encoded Color Bar Signal IEEE Std 202-1954 (R1972), Television: Method of Measurement of Aspect Ratio and Geometric Distortion Page 1 of 4 pages SMPTE EG 1-1 990, Alignment Color Bar Test Signal for Television Picture Monitors SMPTE
6、RP 27.3-1989, Specifications for Safe Action and Safe Title Areas Test Pattern for Television Systems SMPTE RP 87-1991 , Reference Carrier Frequencies, Preemphasis Characteristics and Audio and Control Signals for 3/44 Type E Helical-Scan Video Tape Cassette Recording 3 Reference tapes 3.1 3/4-in ty
7、pe E format 3.1.1 Tape records The location and dimensions of the video and audio records shall be in accordance with ANSI/SMPTE 21 M. 3.1.2 Signal parameters The video and audio signais shall be recorded in accordance with SMPTE RP 87. 3.1.3 Cassette The test tape shail be packaged in a cassette ma
8、de in accordance with ANSVSMPTE 22M. 3.2 1D-h type 0 format 3.2.1 Cassette The test tape shall be packaged in a cassette made in accordance with ANSWMPTE 35M. Copyright O 1993 by the SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdaie Ave., White Plains, NY 10607 (91 4) 761 -1 lo0 Ap
9、proved March 5, 1993 SflPTE RP*lb 93 E3 8357403 OOOObO8 259 M RP 96-1993 3.3 1/2-in type H format 3.3.1 Tape records The location and dimensions of the video and audio records shall be in accordance with ANSVSMPTE 32M. 3.3.2 Signal parameters The video and audio signals shall be recorded in accordan
10、ce with ANSVSMPTE 32M. 3.3.3 Cassette The test tape shall be packaged in a cassette made in accordance with ANSVSMPTE 32M. 4 Content of reference tape 4.1 Video information The video portion shall contain the following scenes: (a) A color bar signal in accordance with EIA 189-A, as modified by SMPTE
11、 EG 1 ; (b) A seven-step gray scale signal; (c) Closeups of female and male models for skin-tone evaluation and general definition; (d) Selected indoor scenes to show typical indoor color: (e) Selected outdoor scene showing samples of sky, architecture, and human models with outdoor illumination: An
12、nex A (informative) Additional data A.l Instructions for setup and playback With the video tape reproducer set for playback, and the operator controls adjusted in accordance with the instruc- tion book furnished with the equipment, listen to the voice of the commentator as he describes each scene an
13、d what it is intended to check. As you view the tape, observe the follow- ing: (a) Look for an excessive amount of noise or snow - it may indicate clogged or excessively worn video heads; (9 Patterns as specified in SMPTE RP 27.3; (9) Acrosshatch pattern video signal (with color burst) in accordance
14、 with IEEE Std 202 to check scanning linearity: (h) A dot pattern video signal (with color burst) as specified in IEEE Std 202; (i) Afull red field to check picture tube purity having the same luminance and chrominance as the red bar in a 75% color bar signal. 4.2 Audio samples (a) Commentary, descr
15、ibing the scenes and calling attention to the reference material and its relationship to proper receiver/monitor setup, is recorded on one of the audio channels; (b) Orchestral music, for evaluation of general audio reproduction, is recorded on the other audio channel. 4.3 General specifications (a)
16、 The main title shall include the issue number of the reference tape: (b) Each cassette shall be supplied in a case and accompanied by a Wratten 478 blue filter (or equiva- lent) and an instruction sheet on tape usage; (c) A suitable marking shall appear on the case and cassette indicating that they
17、 contain the official SMPTE subjective reference tape. NOTE - A reference tape made in accordance with this practice is available from the Society of Motion Picture and Television Engineers. (b) Note picture stability at the top and sides; (c) Note picture sharpness and color fidelity; (d) Listen fo
18、r smooth, even music; quaver may indicate flutter; (e) Listen for natural sound of voice; (f) Look for excessive overscanning or underscanning. Page 2 of 4 pages SMPTE RP*9b 93 B 8357403 0000b09 i195 A2 Namitlon scrlpt The following descriptive narration script is suggested for use with the subjecti
19、ve reference tape, and is used on tapes available from the SMPTE: SMPTE, the Society of Motion Picture and Television Engineers, presents receiver-monitor setup video cassette No. 3. Before using this video tape further, be sure that this SMPTE identification appears both on the case and on the vide
20、o cassette. Absence of this identification indicates that it is an unauthorized duplicate, and cannot be relied upon for its intended use. Potentially hazardous voltages exist within the receiver- monitor. Any adjustment requiring removal of any portion of the cabinet should be referred to a qualifi
21、ed service technician. This recording of split-field SMPTE color bars is provided for an initial Check-out of the overall playback system. Please note, however, that the purpose of this tape is to verify that your video cassette playback system is operating normally and to supply reference signals f
22、or adjusting oper- ating controls on your receiver or monitor. It is not intended for video tape recorder alignment. First, adjust the tracking control and, if available, the skew controls for best picture clarity and stability. Now disable any receiver or monitor automatic controls and adjust the p
23、icture controls for best color pictures, according to your normal operating procedures. If you are experienced in color monitor setup using color bars, and this was a routine playback system Check-out before use, you need not view the remaining tape segments. However, if you are still dissatisfied w
24、ith the colorimetry or geometry or noise in this picture, you will find guidance for possible improvements in one of the following tape seg- ments: (2) brightness and contrast adjustment; (3) colorimetry adjust- ment; (4) subjective quality touchup; (5) raster geometry and convergence Che on the sla
25、ts in the background shutters, for example. You should also be seeing fine detail in the womans hair. Should major adjust- ments be required on one or more controls, either the adjustment procedure must be repeated, or your equipment needs service. If you have not been hearing music in the backgroun
26、d, and your VCR has two audio channels, set your audio channel output selector switch to the mix position. Music level should be heard under the voice. For the next 15 seconds, the music channel playback will be set at peak operating level, to permit further Check-out of the distortion and tone qual
27、ity of your sound system. Skin tones should appear natural. With the white railing and black-and-white building facades and blue sky, this scene contains the full contrast range. Segment 5 is a series of test signals and patterns which enable you to check the raster geometry and convergence of your
28、receiver or monitor. This picture should appear uniformly red, the same hue as the red bar in the segment 3 colorimetry adjustment. If other stationary colors appear Page 3 of 4 pages SMPTE RP*7b 73 U 8357YOL OOOObLO 707 Es RP 96-1993 on any portion of the screen, screen demagnetization, con- vergen
29、ce, or electronics adjustment are required. These dots should appear white in all areas of the screen. If you see significant colored fringes on any dots, convergence adjustment may be required. The vertical and horizontal lines of the crosshatch pattern should appear sharp and straight and uniforml
30、y spaced out to the edges of the screen. Servicing may be required if they are not. However, some sets cannot be adjusted perfectly. A common problem in monitor and receiver performance is horizontal and/or vertical overscanning. The outline surrounding the words “safe title area” should be centered
31、 symmetrically on the screen and well within its edges. If your picture is properly scanned, you are now seeing all four sides of a larger “safe action area” rectangle. How- ever, some sets do not have adjustment controls for both horizontal and vertical picture size. This concludes SMPTE receiver-monitor setup video cassette No. 3. Duplication in prohibited. For additional copies of this reference tape, call or write SMPTE head- quarters. Page 4 of 4 pages
