Fujitsu V01 manual 122

Appendixes

receiver to correct errors without the need to request the sender for retransmission.

Flow Control

The procedure for controlling the flow of data between two devices. Its purpose is to prevent data from being lost when a device buffer becomes full.

GATEWAY

A node that connects network systems that use different protocols. A gateway basically converts one protocol into another to support operation between two networks. In a looser sense, gateway sometimes means a machine that transfers information between any two networks.

GOLD CODE SEQ N

An index number that generates the initial values used to generate the Gold code, which is used for physical layer scrambling processing in the DVB-S2 standard.

GOP (Group Of Pictures)

The smallest of the structural units composing a movie. A GOP consists of 3 types of frames: I frame, P frame, and B frame.

HDCP (High-bandwidth Digital Content Protection system)

One of the copy protection technologies for the illegal content copy between the video player and the video display.

HD-SDI (High Definition television - Serial Digital Interface)

HD-SDI is the serial digital interface to transmit HD (High Definition) video signal, which transmission rate is 1.485 Gbps. It can transmit multiplexing HD video signal, PCM audio signal and data signal like time stamp.

HDMI (High Definition Multimedia Interface) One of the multimedia interfaces integrated the

audio, video and control and communicate each other.

IP-900 Series

H.264

One of the video compression coding systems

standardized in ITU (International Telecommunication Union) in May, 2003. It is also standardized as a part of MPEG-4 (MPEG-4 part 10 Advanced Video Coding) in ISO (International Organization for Standard.) Therefore, it is commonly called H.264/MPEG-4 AVC or H.264/AVC, showing both of parties.

This technology is used for the various applications from the low bit rate and low resolution like the mobile TV to the high bit rate, high resolution like HDTV. It is improved that the data capacity is half comparing MPEG-2 used wide spread.

HTTP (Hyper Text Transfer Protocol)

The protocol for tranferring files and other data between a Web server and a browser.

HUB

A concentrator required to use 10Base-T or 100Base-TX as a local area network (LAN) standard. Twisted-pair cables are used to connect hubs. A high-speed hub conforms to 100Base-TX. A switching hub has switching functions.

IBBP/IBP/IPPP/PPPP

Video encoding structure with using I, P, and B frame.

I frame: Intra frame. Frame encoded by using internal video information.

P frame: Prediction Picture frame. Frame encoded by using correlation with previous frame.

B frame: Bi-directional Interter frame. Frame encoded by using previous and next coming I frame or P frame.

IF-band

A part of a very high frequency band (VHF band: 30 to 300 MHz.) The IF-band is selected only if an IF-band modulator card is used for operation.

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