R&S®Test DVDs Professional
The world's most comprehensive DVD set with test patterns and data streams
DVD1: Signal and video quality
DVD players often feature a wide variety of video outputs. Many players not only offer CCVS signal outputs to PAL or NTSC, but also RGB and YCbCr com- ponent signal outputs as well as a YCS-video signal output. In addition, video signals can be output with 525 or 625 lines and with aspect ratio 4:3 or 16:9. Reliable quality assessment for such a wealth of signals calls for professional video test equipment, for example Video Measurement System R&S® VSA or Video Analyzer R&S® UAF from Rohde & Schwarz (see image). Test DVD 1 delivers all the necessary signals with the levels and timing conforming to the standards. Main measurements include:
- Level
- Linear and nonlinear distortions
- Chrominance/luminance delays
- Levels and delays of components relative to one another
- S/N ratio
- Timing
Utmost care was taken to avoid any artefacts being generated in signal coding, and thus avoid any impairments to measurement quality. The most important signals are combined in test patterns, allowing a wide variety of measurements to be performed in just a few seconds without any tedious switch-overs being required on the DVD player (see Codec43 test pattern). This enables extensive testing of video and audio signal outputs even during short production cycles.
Plus, comprehensive measurement series carried out for comparing different products can be speeded up considerably. No extra time is required for configuring the Rohde & Schwarz video analyzers. In addition to the main test signals, the Codec test pattern comprises moving elements that provide information on whether the correct TV standard was set on the DVD player, or whether decoding errors occur. Moreover, a 30 s CCITT O.33 audio sequence is added to the test pattern, thus allowing important audio measurements to be carried out along with the video measurements in a single test cycle.
Most of the video sequences also contain audio signals ranging from 997 Hz reference signals and pink noise up to AC-3 test signals for simultaneous and complete assessment of audio and video streams.
