ISO/IEC 9637-1:1994

Name: ISO/IEC 9637-1:1994 — Information technology — Computer graphics — Interfacing techniques for dialogues with graphical devices (CGI) — Data stream binding — Part 1: Character encoding
SKU: ISO/IEC 9637-1:1994
Price: 113400 RUB
Availability: InStock

Information technology — Computer graphics — Interfacing techniques for dialogues with graphical devices (CGI) — Data stream binding — Part 1: Character encoding

Название (английский):

ISO/IEC 9637-1:1994

Information technology — Computer graphics — Interfacing techniques for dialogues with graphical devices (CGI) — Data stream binding — Part 1: Character encoding

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 63
Дата публикации:: 3 марта 1994 г.
Издание:: ISO/IEC IS 9637 edition 1 version 1
ICS:: 35.140

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Описание (английский):

Specifies a character encoding of the computer graphics interface. For each of the functions specified in ISO/IEC 9636 an encoding is specified. The encoding provides a highly compact representation of the data, suitable for applications that require the data to be of minimum size and suitable for transmission with character-oriented transmission services.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/IEC 9637-1:1994, "Information technology - Computer graphics - Interfacing techniques for dialogues with graphical devices (CGI) - Data stream binding - Part 1: Character encoding," defines a compact character encoding for the Computer Graphics Interface (CGI). Designed to minimize data size and to work over character-oriented transmission services, this standard maps every CGI function (as specified in ISO/IEC 9636) to a compact, transportable character-stream representation suitable for storage and low-bandwidth transfer.

Note: in this context CGI = Computer Graphics Interface (not web CGI).

Key Topics

Purpose & objectives: regular syntax for simple parsing, maximum compactness, extensibility and transportability for character-based networks.

Overall structure: general form of the data stream and rules for entering/leaving the CGI environment.

Function encoding: method for encoding opcodes, extension mechanisms, and soliciting functions; an annex lists CGI opcodes and escape sequences.

Parameter encoding: formats for integers, real numbers, Virtual Device Coordinates (VDC/points), point lists, color specifiers and color lists, string parameters, enumerated and index parameters, client-specified names, input-color parameters, and data record parameters.

Bitstream formats: 7-bit/8-bit code tables, bitstream, run-length and displacement/incremental modes for efficient coordinate and color data.

Compatibility and conformance: conforms to ISO 2022 code-extension rules and follows ISO/IEC 646 character-set conventions.

Auxiliary material: examples, defaults, classification and designation rules; annexes with opcode and escape-sequence listings.

Applications

Efficient transfer of graphical commands between systems over character-oriented links (e.g., legacy terminals, narrow-band networks, serial links).

Storage and archival of compact graphics command streams where file size matters.

Implementations of CGI-compliant device drivers, graphics interpreters and metafile converters that must interoperate with ISO/IEC 9636 functional definitions.

Embedded graphics systems and device controllers with constrained memory or bandwidth that benefit from compact opcode and parameter encodings.

Tooling for graphics interchange, translation between character, binary (ISO/IEC 9637-2), and clear-text (ISO/IEC 9637-3) encodings.

Related Standards

ISO/IEC 9636 (CGI functional specification)

ISO/IEC 9637-2 (Binary encoding) and ISO/IEC 9637-3 (Clear text encoding)

ISO 2022 (Code extension techniques) and ISO/IEC 646 (7-bit character set)

ISO/IEC 8632-2 (CGM character encoding), ISO/IEC 6429 and ISO/IEC 7942 (GKS)

This standard is essential reading for graphics protocol designers, implementers of device interfaces, and anyone needing a compact, standards-based character encoding for computer-graphics command streams.

ISO/IEC 9637-1:1994

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

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