RGBlink VENUS X1 User Manual page 20

1. Introduction
Terms and Definitions
Introduced in 2003, the HDMI specification has gone through several
revisions.
 "HDSDI": The high-definition version of SDI specified in SMPTE-292M.
This signal standard transmits audio and video with 10 bit depth and
4:2:2 color quantization over a single coaxial cable with a data rate of
1.485 Gbit/second. Multiple video resolutions exists including
progressive 1280x720 and interlaced 1920x1080 resolution. Up to 32
audio signals are carried in the ancillary data.
 "JPEG" (Joint photographic Expects Group): Commonly used
method of lossy compression for photographic images using a discreet
cosine transfer function. The degree of compression can be adjusted,
allowing a selectable tradeoff between storage size and image quality.
JPEG typically achieves 10:1 compression with little perceptible loss in
image quality. Produces blocking artifacts.
 "MPEG": Motion image Expect Group. A standard committee under the
auspices of the International Standards Organization working on
algorithm standards that allow digital compression, storage and
transmission of moving image information such as motion video,
CD-quality audio, and control data at CD-ROM bandwidth. The MPEG
algorithm provides inter-frame compression of video images and can
have an effective compression rate of 100:1 to 200:1.
 "NTSC": The color video standard used in North America and some
other parts of the world created by the National Television Standards
Committee in the 1950s. A color signal must be compatible with
black-and-white TV sets. NTSC utilizes an interlaced video signals,
525 lines of resolution with a refresh rate of 60 fields per second (60
Hz). Each frame is comprised of two fields of 262.5 lines each, running
at an effective rate of 30 frames per second.
 "PAL": Phase Alternate Line. A television standard in which the phase
of the color carrier is alternated from line to line. It takes four full
images (8 fields) for the color-to-horizontal phase relationship to return
to the reference point. This alternation helps cancel out phase errors.
For this reason, the hue control is not needed on a PAL TV set. PAL, in
many transmission forms, is widely used in Western Europe, Australia,
Africa, the Middle East, and Micronesia. PAL uses 625-line, 50-filed
(25 fps) composite color transmission system.
 "Operator": Refers to the person who uses the system.
 "PIP": image-in-image. A small image within a larger image created by
scaling down one of the images to make it smaller. Each image
requires a separate video source such as a camera, VCR, or computer.
Other forms of PIP displays include image-by-image (PBP) and
image-with-image (PWP), which are commonly used with 16:9 aspect
display devices. PBP and PWP image formats require a separate
VENUS X1 User Manual 20