ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007 is a supporting modification to the parent MPEG conformance testing document, focused on Information technology - Generic coding of moving pictures and associated audio information - Part 4: Conformance testing - Amendment 2: Additional audio conformance test sequences - Technical Corrigendum 1. It is relevant where organizations need to review updated conformance-test content for audio-related verification activities, technical validation, or documented evaluation of codec behavior. For teams working with ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007, the document helps align test planning and compliance workflows with the corrected amendment language.

Overview of ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007

This reference functions as a corrigendum connected to Amendment 2 of ISO/IEC 13818-4, rather than as a standalone technical specification. Its role is to support accurate interpretation of the conformance testing material by correcting or refining the amendment text associated with additional audio conformance test sequences. In practice, that makes it useful for engineering review, laboratory evaluation, and conformity assessment work where precision in test definitions and expected outcomes matters. Organizations using ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007 typically need it to maintain consistency across technical documentation and verification procedures.

Compliance applications of ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007

The document is commonly consulted in workflows involving audio codec testing, product evaluation, and conformance checking for digital media implementations tied to the MPEG family. It may support verification activities in development labs, test houses, and compliance teams that need a reliable technical document for reviewing sequence-based test behavior. When used alongside the parent reference ISO/IEC 13818, it can help procurement, engineering documentation, and regulatory preparation teams confirm that the correct supporting revision is being applied during technical assessment and quality workflows.

Importance of compliance with ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007

Using the corrected amendment reference helps reduce interpretation errors during testing and improves operational consistency across teams responsible for validation and conformity assessment. For organizations managing procurement or certification preparation, it provides a clearer basis for selecting the right compliance reference and avoiding discrepancies in test execution. This is especially important where audio conformance evidence must be traceable, repeatable, and defensible in quality assurance records. In that sense, ISO/IEC 13818-4:2004/AMD2:2005/COR1:2007 supports risk reduction by improving the reliability of technical review and verification workflows.

• Supporting corrigendum linked to Amendment 2 of the MPEG Part 4 conformance testing material
• Relevant to additional audio conformance test sequences and related verification activities
• Useful for laboratory evaluation, technical validation, and conformity assessment documentation
• Helps maintain consistency in engineering documentation and compliance workflows
• Applied alongside the parent ISO/IEC 13818 reference for accurate test interpretation