ISO/IEC 13818-9:1996 PDF

Name: ISO/IEC 13818-9:1996 — Information technology — Generic coding of moving pictures and associated audio information — Part 9: Extension for real time interface for systems decoders
SKU: ISO/IEC 13818-9:1996
Price: 25 EUR
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Information technology — Generic coding of moving pictures and associated audio information — Part 9: Extension for real time interface for systems decoders

Название (английский):

ISO/IEC 13818-9:1996

Information technology — Generic coding of moving pictures and associated audio information — Part 9: Extension for real time interface for systems decoders

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 12 декабря 1996 г.
Издание:: ISO/IEC IS 13818 edition 1 version 1
ICS:: 35.040

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Цена:75 €

Описание (английский):

Does not change or supersede any of the requirements in ISO/IEC 13818-1. All transport streams, whether or not they are delivered in accordance with the RTI shall comply with ISO/IEC 13818-1.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO/IEC 13818-9:1996 specifies a Real Time Interface (RTI) extension for systems decoders that receive Transport Streams. It does not change or supersede any requirements in ISO/IEC 13818-1; all Transport Streams must still comply with Part 1. Part 9 defines timing, clock/PCR relationships, buffer-sizing adjustments, and conformance tests so that decoders with an RTI can operate correctly when fed real-time-delivered stream bytes.

Key topics and technical requirements

Real-Time Interface Decoder (RTD) model: a conceptual decoder model used to state RTI timing and buffer requirements. The RTD is based on the T-STD model from ISO/IEC 13818-1 but replaces the T-STD byte schedule with actual byte arrival times and adds RTI-specific constraints.

PCR accuracy and timing: defines the relationship between Program Clock Reference (PCR) values and the arrival time of the bytes that carry them. A system clock counter and a bounded arrival-time error (tjitter) are required so PCRs map to receiver clock time within the specified jitter bounds.

Clock frequency and slew: system clock frequency accuracy and slew-rate limits from Part 1 are mandatory for RTI. Practical conformance checks use typical bounds referenced in the standard (for example, frequency error and small slew limits are considered during testing).

Buffer sizing: RTD buffer sizes (transport buffer, smoothing, multiplex and decoder buffers) are increased relative to T-STD sizes to account for arrival jitter. Formulas in the standard add terms proportional to tjitter × data rate (plus packet overhead) to ensure no under/overflow.

Low-Jitter profile (RTI-LJ): a defined RTI profile for low-jitter applications uses tjitter = 50 microseconds; decoders claiming RTI-LJ must handle any stream meeting that jitter bound.

Compliance testing methods:

Plot PCR (converted to time) versus PCR arrival time: inspect slope (frequency error), curvature (slew), and horizontal scatter (jitter).
Approximate tests: Diverging Lines and Parallel Lines tests using frequency-error bounds (e.g., ±30 ppm) and horizontal separation = tjitter.
Buffer occupancy tests adapted from T-STD to RTD arrival times and buffer sizes.

Applications and who uses it

Broadcast equipment designers and systems decoder manufacturers implement RTI timing and buffering to ensure real‑time playback interoperability.

Set-top box and receiver integrators use RTI constraints to design interfaces between data-link adaptors and decoders.

Test laboratories and quality assurance engineers employ the RTI conformance tests (PCR vs arrival analysis, buffer tests) to validate stream delivery and decoder behavior.

Service operators and system architects use RTI profiles (e.g., RTI-LJ) to specify interoperability limits for low-jitter delivery systems.

ISO/IEC 13818-9:1996 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

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