Transcript
Video Quality Evaluation Equipment SDTV Video Quality Evaluation Equipment (Double Stimulus Video Evaluation)
VP21S
This device performs automatic, real-time evaluation of SDTV video image quality. VP21S achieves automated, real-time measurement and analysis by comparing the source and the tested video. Our patented Video DNA Technology gives evaluation that highly correlates with subjective testing according to ITU standards (DSCQS*). Video synchronization is done automatically by the equipment, and analysis is done at pixel level of detail. VP21S is mainly used for CODEC evaluation, QA verification and SDTV system performance improvements.
Applications ●
Encoder/decoder debugging operations
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broadcast system video qualityevaluation
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Automatic dubbing quality evaluation
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Evaluations of encoding quality/performance during DVD authoring
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Automatic evaluation of master DVD playback quality
Characteristics ●
Video Input/Output (no need for PC connection for evaluation)
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Automatic video synchronization without special markers
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High correlation to subjective testing (DSCQS) (0.9)
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Uses animation to caption generated noise (Option)
* Double Stimulus Continuous Quality Scale:
This method has been standardized under ITU-R (International Telecommunications Union-Recommendation). Under this method,picture quality is expressed as a percent from 0 to 100 with 0 indicating no distortion.
Specifications Model name
VP21S (standard specs)
VP21S (PC connection type) * OS Windows (R) only
Evaluation video input
NTSC analog, PAL analog, SMPTE259M (SD-SDI)
NTSC analog, PAL analog, SMPTE259M (SD-SDI), PC connection RS232C (Dsub9pin)
Evaluation measurement parameters
DSCQS value (%) Y/C SNR value
DSCQS value (%) Y/C SNR value
Delay compensation * Measurement of CODEC internal delay
Frame: Max. 60 (2 sec. intervals) Line: Max. ±4 (manual) Pixel: Max. ±24
Frame: Max. 60 (2 sec. intervals) Line: Max. ±4 (manual) Pixel: Max. ±24
Device size
Width: Depth: Height = 430: 500: 87(mm) 2U
Voltage, power consumption, weight
AC 100V - 240V, 50/60Hz 200W, 8kg
System configuration example: CODEC quality evaluation using VP21S ●
Show DSCQS graph and scores on evaluation video screen
Monitor (Under Test)
Original
Measurement results on Monitor
SD-SDI or Analog
SD-SDI or Analog
VP21S
Original play-back
Test video Te
Application example: Comprehensive video quality control throughout DVD production process Dubbing check
Conversion to DVD
Playback Planning
Filming and recording
Tele-Cine editing and MA
Original content
For software distribution
Pull-down check
Dubbing IN
Dubbing OUT
Standard Video Quality Evaluation Equipment: VP21S Video input signal
ENC IN
Encoding
Authoring
Master DVD complete
Video quality check
ENC OUT
Standard Video Quality Evaluation Equipment: VP21S
DVD players (models A to D) Player check
Master DVD playback OUT
Various manufacturer player playback OUT
Standard Video Quality Evaluation Equipment: VP21S
