Rgblink CP 3072 User Manual Uživatelský manuál stáhnout pdf (Strana 17)

1. Brief Introduction

Terms and Definitions

CP 3072 User Manual 17

image quality. This communication takes place over the DDC –

Display Data Channel.

 “Frame”: In interlaced video, a frame is one complete picture. A video

frame is made up of two fields, or two sets of interlaced lines. In a film,

a frame is one still picture of a series that makes up a motion picture.

 “HDMI” - High – Definition Multimedia Interface: An interface used

primarily in consumer electronics for the transmission of

uncompressed high definition video, up to 8 channels of audio, and

control signals, over a single cable. HDMI is the de facto standard for

HDTV displays, Blu-ray Disc players, and other HDTV electronics.

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 exist including

progressive 1280x720 and interlaced 1920x1080 resolutions. Up to 32

audio signals are carried in the ancillary data.

 “JPEG” (Joint photographic Expects Group): Commonly used

method of loss 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 Picture Expect Group. A standard committee under

the auspices of the International Standards Organization working on

algorithm standards that allows 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.

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Rgblink CP 3072 User Manual Uživatelský manuál Strana 17