ISO-IEC 23003-4:2015, also known as MPEG-D USAC, is a technical standard developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It defines a method for efficient audio coding that provides high quality audio at low bit rates. This standard specifically focuses on the compression of audio signals, enabling efficient storage and transmission while maintaining perceptual fidelity.
Technical Details of ISO-IEC 23003-4:2015
The ISO-IEC 23003-4:2015 standard follows a hybrid coding approach, combining both parametric and non-parametric coding techniques. Parametric coding models the characteristics of an audio signal using a limited set of parameters, reducing data redundancy. Non-parametric coding, on the other hand, represents the residual differences not captured by the parametric model.
MPEG-D USAC utilizes a wide range of coding tools to achieve efficient compression. These include sinusoidal modeling, harmonic transposition, noise shaping, adaptive quantization, and temporal noise shaping. By utilizing these tools, the standard can achieve high compression ratios while maintaining audio quality comparable to or even exceeding traditional audio codecs.
Applications and Benefits
ISO-IEC 23003-4:2015 finds applications in various domains where audio compression is required. It is particularly useful in multimedia streaming services, where bandwidth efficiency is crucial for delivering high-quality audio content. The standard can also be utilized in telecommunication systems, digital broadcasting, and storage devices, optimizing resource utilization without compromising audio fidelity.
One of the significant benefits of ISO-IEC 23003-4:2015 is its scalability. This means that it supports various bitrates and quality levels, allowing the encoder to adapt to different network conditions or user preferences. The standard also provides error resilience features, ensuring robust audio transmission over lossy networks.
Conclusion
ISO-IEC 23003-4:2015, or MPEG-D USAC, is a technical standard for efficient audio coding. By employing a hybrid approach and utilizing advanced coding tools, it achieves high compression ratios while maintaining perceptual audio quality. With its scalability and error resilience features, it finds applications in diverse domains, ranging from multimedia streaming services to telecommunication systems. As technology advances, ISO-IEC 23003-4:2015 continues to play a significant role in optimizing audio coding efficiency and improving user experiences.
Nina She