Overview
ISO/IEC 23004-4:2007 - Information technology - Multimedia Middleware - Part 4: Resource and quality management - defines the resource and quality management framework and API interfaces for MPEG Multimedia Middleware (M3W). Published by ISO/IEC, this part specifies the support application programming interface and the realization technology used to create, assign, enforce and remove resource budgets on M3W platforms. The framework is optional for M3W implementations but provides mechanisms to guarantee protected, timely access to system resources (CPU, memory, power, etc.) and to coordinate negotiated trade-offs between resource budgets and delivered quality.
Key topics and technical requirements
- Resource specification and management models: APIs for applications to request budgets (resource shares) and for the runtime to account, enforce and monitor committed budgets.
- Entities and roles: Defined roles include resource chief, resource manager, quality chief and quality manager responsible for budget lifecycle, enforcement and negotiation.
- Budget–quality negotiation: Interfaces for assessing feasibility, selecting resource configurations (sets of assigned budgets), registration and priority setting during negotiation of contracts between system and applications.
- Quality-aware (QA) entities: QA applications expose multiple quality levels and the associated resource requirements; the standard defines interfaces for querying and selecting quality levels based on assigned budgets.
- Guarantees and feasibility: Budgets assigned must be obtainable - the framework must prevent commitment of resources beyond availability to ensure robust, predictable behavior.
- Power and thermal considerations: Power management is treated as a resource; document discusses integration of power control (e.g., CPU frequency/voltage scaling) with resource and quality management to improve battery life and control device heating.
- Realization guidance: Annexes provide dynamic views, CPU-chief details, power-management approach, and composition of quality information for composed entities.
Applications and users
ISO/IEC 23004-4:2007 is targeted at:
- Middleware developers and implementers building M3W-compliant platforms
- System integrators and OEMs of high-volume embedded appliances (consumer electronics, set-top boxes, mobile devices)
- Firmware and OS resource managers implementing guaranteed resource allocation and QoS
- Application developers producing resource-aware and quality-aware multimedia applications that adapt to runtime budgets
Practical benefits include improved system robustness, predictable real-time behavior, optimized power consumption, and better overall quality-of-service (QoS) management.
Related standards
- ISO/IEC 23004-1: Architecture (normative reference)
- Other parts of the ISO/IEC 23004 series: Part 2 (API), Part 3 (Component model), Part 5 (Component download), Part 6 (Fault management), Part 7 (System integrity management)
Keywords: ISO/IEC 23004-4:2007, Multimedia Middleware, M3W, resource management, quality management, power management, resource budgets, quality-aware applications, CPU chief, API.
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