Products
Technology
Partners News & Events About Us
Contact UsSite MapLanguage
Video Quality Monitoring
Video Quality Monitoring Equipment QuMax-Probe300
Video Quality Monitoring Equipment NP-2000
Video Quality Monitoring Equipment QuMax-2000
Video Quality Evaluation Equipment & Video Quality Monitoring Equipment
Video Quality Evaluation
Video Quality Evaluation Equipment VP4000
Video Quality Evaluation Equipment VP3000S
Video Quality Analysis & Picture Quality Measurement
MPEG Evaluation
TS-7815
Software Solution
Video Quality Analysis Software Solutions Video DNA Analyzer
Video Quality Analysis & Picture Quality Measurement

Products / VP4000

Video Quality Analysis & Picture Quality Measurement Products

VP4000
4K Picture Quality Analyzer

4K video real time double stimulus (a comparison method) quality analysis

The The frame delay of 2160p full sample 4K reference video and 4K test video are compensated to fit exactly to each other by pixel base, and a real time objective quality score (DSCQS) are calculated by the ITU-T J.144-based assessing method in conjunction with the differential values (PSNR). This scheme is best suited to the encoder evaluation, online/standby comparison, inspection geared to video servers, and so on. For conventional 1080i image evaluation, a single PROBE4000 board can serve the purpose.

4K video real time double stimulus (a comparison method) quality analysis

Input video specifications

  • Resolution/frame rate: 1920 x 1080, YC 4:2:2, 10 bit, 59.94p/50 (with one PROBE4000 board)
    SDI: 3G-SDI Level A or Level B Quad input, SMPTE 424M/ SMPTE 425M
    Image Partition: Square Division(Quarters)and 2-Sample Interleaves
  • Resolution/frame rate: 3840 x 2160, YC 4:2:2, 10, bit 59.94p/50 (with 4 PROBE4000 boards)

PSNR and Objective Quality Score

Since the objective quality score obtained from the double stimulus analysis is usable as a subjective score in its own given by a human eyes (QoE: Quality of Experience), whether or not user quality requirement is met can precisely be judged on a frame basis. In general, at a broadcasting station, for instance, degree of picture quality degradation not exceeding 12 % (4.5 or more in 5-point scale) is acceptable from the viewpoint of service. DSCQS : Double Stimulus Continuous Quality Scale.

4K video real time double stimulus (a comparison method) quality analysis

ITU-T J.144 picture quality measurement algorithm

Core parameters for picture quality analysis are calculated complying with ITU-T J.144 standard.

4K video real time double stimulus (a comparison method) quality analysis

PSNR and objective DSCQS (Double Stimulus Continuous Quality Scale)

4K video real time double stimulus (a comparison method) quality analysis

Very locally occurred pixel error can be detected which PSNR is incapable

It is quite difficult by PSNR to detect a very locally occurred pixel error such as single block noise or a dot inversion because PSNR is an averaged value where a minor error becomes negligible small. However, VP4000 can identify a pixel error from compression noise by a pixel by pixel investigation algorithm.

4K video real time double stimulus (a comparison method) quality analysis

VP4000 chassis specifications

4K video real time double stimulus (a comparison method) quality analysis

PROBE4000 board specifications

4K video real time double stimulus (a comparison method) quality analysis

Video Quality Analysis & Picture Quality Measurement Products
Video Quality Analysis & Picture Quality Measurement
 
 



Products | Technology | Partners | News & Events | About Us | Contact Us | Site Map | Home
© 2011 K-Will Corporation. All rights reserved.
Home