GB/T 15845.4-2003Performance requirements of audio-visual terminals -- Narrow-band audio visual system and terminal equipment (English PDF)
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Level / Type
National · Recommended
Issue date
January 17, 2003
Implementation date
August 1, 2003
Scope
GB/T 15845.4-2003 (Performance requirements of audio-visual terminals -- Narrow-band audio visual system and terminal equipment) is available as an English-translated PDF.
GB/T 15845.4-2003 — This standard specifies the narrowband audio-visual systems and terminal equipment technical requirements. For videophone requirements for audiovisual services specified in the proposed F. 720, for meeting the requirements of television audiovisual services as specified in the proposed F. 702.
Audio encoding, video encoding, and other public audiovisual services are part of the technical requirements in H. 200/F. 720 series of other proposals in the proposed regulations.
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Document preview — GB/T 15845.4-2003
National Standard of the People's Republic of China
- ICS
- 33.160.60
- Classification
- M 32
- Replacing
- GB/T 15845.4-1995
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Contents
- What this standard covers1
- Document data2
What this standard covers
This standard specifies the narrowband audio-visual systems and terminal equipment technical requirements. For videophone requirements for audiovisual services specified in the proposed F. 720, for meeting the requirements of television audiovisual services as specified in the proposed F. 702. Audio encoding, video encoding, and other public audiovisual services are part of the technical requirements in H. 200/F. 720 series of other proposals in the proposed regulations. This section applies to narrowband audio-visual systems and terminal equipment, such audiovisual equipment business channel rate of not more than 1920kbit/s.
Document data
International classification (ICS): 33.160.60.
Chinese classification (CCS): M32.
Estimated length of the Chinese original: 22,257 words.
Adopted international standard: ITU-T H.320-1999, IDT.
Supersedes the earlier edition GB/T 15845.4-1995.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 15845.1-1995 — Performance requirements of audiovisual terminals. Frame structure for a 64 to 1920kbit/s channel in audiovisual teleservices
GB/T 15845.2-1995 — Performance requirements of audiovisual terminals. Frame-synchronous control and indication signals for audiovisual systems
GB/T 15845.3-1995 — Performance requirements of audiovisual terminals. System for establishing communication between audiovisual terminals using digital channels up to 2Mbit/s
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GB/T 15845.4-2003
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