Overview
ISO/IEC 14496-26:2010/Amd 2:2010 is an important amendment to the international standard for information technology related to the coding of audio-visual objects. Specifically, it targets Part 26: Audio conformance with an emphasis on BSAC (Bit-Sliced Arithmetic Coding) conformance for broadcasting. This amendment enhances the existing ISO/IEC 14496-26:2010 standard by adding support for BSAC audio coding profiles to better facilitate terrestrial digital multimedia broadcasting (T-DMB) implementations.
Developed under the joint technical committee ISO/IEC JTC 1, Subcommittee SC 29, this amendment provides crucial extensions in conformance testing for broadcasters and technology implementers working with audio streams in digital broadcast environments. It ensures compatibility and streamlines audio quality verification for terrestrial DVB products using BSAC coding formats.
Key Topics
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Audio Conformance for Broadcasting: This amendment focuses on defining BSAC audio bitstreams and conformance criteria specific to broadcasting, which is vital for high-quality digital radio and multimedia services.
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BSAC Profiles for Terrestrial-DMB: Adds detailed Bit-Rate, sampling rates (24, 44.1, and 48 kHz), and layer configurations for various BSAC object types tailored to the T-DMB broadcasting environment.
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Extension of ER BSAC Object Types: Provides a comprehensive table (Table 26.A) listing extended BSAC audio configurations including parameters such as:
- Base and top bitrates in kbit/s
- Number of elementary streams (ES)
- Number of audio channels
- Tool usage flags (Intensity, Mid/Side stereo (MS), Temporal Noise Shaping (TNS), Perceptual Noise Substitution (PNS))
- EpConfig and Scalefactor Band Adjustment (SBA) specifics
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Conformance Bitstreams for Implementation: Having these defined bitstreams supports the validation and development of audio decoders for broadcast devices and software.
Applications
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Terrestrial Digital Multimedia Broadcasting (T-DMB): The amendment supports broadcasters and manufacturers in deploying reliable audio streams compliant with ISO/IEC standards for digital radio and multimedia services over terrestrial networks.
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Broadcast Equipment Manufacturing: Enables manufacturers to design and test audio coding solutions that comply with BSAC profiles and ensures interoperability across devices and networks.
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Audio Decoder Development: Software and hardware developers utilize this standard for validating audio decoders against defined BSAC conformance bitstreams, ensuring robust performance in real-world broadcasting scenarios.
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Quality Assurance and Standard Compliance: Testing laboratories and certification bodies rely on these conformance specifications to quantify and verify the compliance of BSAC audio streams within broadcast systems.
Related Standards
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ISO/IEC 14496 Series: Broadly covers the coding of audio-visual objects, including video and audio coding standards and MPEG-related technologies.
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ISO/IEC 14496-3: Audio coding as part of MPEG-4, providing the foundation for MPEG audio profiles including AAC and BSAC.
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ISO/IEC JTC 1 SC 29: The subcommittee responsible for multimedia coding standards encompassing audio, video, and image technologies.
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Digital Radio and Multimedia Broadcasting Standards: T-DMB and other digital broadcast standards often reference ISO/IEC 14496 parts for audio coding conformance.
Keywords: ISO/IEC 14496-26 amendment 2, BSAC conformance, audio coding standard, terrestrial digital multimedia broadcasting, T-DMB audio conformance, audio coding for broadcasting, audio-visual objects coding, digital broadcast audio standard, MPEG audio conformance, BSAC profiles, digital radio broadcasting standard.
Open preview (PDF)Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 2: BSAC conformance for broadcasting
