Opus vs. Vs. G.722

Attribute	Opus	Vs. G.722
Codec Type	Lossy	Lossy
Bitrate	Variable	Fixed
Complexity	Low	High
Quality	High	High

Introduction

When it comes to audio codecs, Opus and G.722 are two popular choices that are widely used in various applications such as VoIP, video conferencing, and online gaming. Both codecs offer high-quality audio compression, but they have some key differences in terms of performance, compatibility, and efficiency. In this article, we will compare the attributes of Opus and G.722 to help you understand which codec may be more suitable for your specific needs.

Audio Quality

Opus is known for its exceptional audio quality, especially at lower bitrates. It uses a hybrid approach that combines the best features of speech and audio codecs, resulting in clear and natural sound reproduction. On the other hand, G.722 is a standard codec that provides good audio quality, but it may not be as impressive as Opus in terms of clarity and fidelity. Opus is particularly well-suited for applications where high-quality audio is essential, such as music streaming and voice communication.

Bitrate and Compression

Opus is a versatile codec that supports a wide range of bitrates, from as low as 6 kbps to as high as 510 kbps. It offers excellent compression efficiency, making it ideal for scenarios where bandwidth is limited or variable. G.722, on the other hand, has a fixed bitrate of 64 kbps, which may not be as flexible as Opus in certain situations. However, G.722 is known for its low latency and robustness, making it a reliable choice for real-time communication applications.

Compatibility and Support

Opus is an open-source codec that is widely supported by most modern devices and platforms. It is the default codec for WebRTC and is compatible with popular software such as Skype, Discord, and Zoom. G.722, on the other hand, is a standard codec that is supported by many VoIP systems and hardware devices. While G.722 may not be as widely adopted as Opus, it is still a popular choice for enterprise communication systems and legacy equipment.

Bandwidth Efficiency

Opus is known for its efficient use of bandwidth, thanks to its adaptive bitrate control and wide range of supported bitrates. It can dynamically adjust the bitrate based on network conditions, ensuring optimal audio quality while minimizing bandwidth usage. G.722, on the other hand, has a fixed bitrate of 64 kbps, which may not be as efficient in scenarios where bandwidth is limited or expensive. Opus is a better choice for applications that require high-quality audio with minimal bandwidth consumption.

Latency and Delay

Opus is designed for low latency communication, with a typical delay of around 20 milliseconds. This makes it suitable for real-time applications such as online gaming and video conferencing, where instant audio feedback is crucial. G.722, on the other hand, has a slightly higher latency of around 40 milliseconds, which may not be as ideal for time-sensitive applications. Opus is the preferred choice for scenarios where low latency is a priority.

Conclusion

In conclusion, Opus and G.722 are both excellent audio codecs that offer high-quality compression and performance. Opus excels in terms of audio quality, flexibility, and bandwidth efficiency, making it a popular choice for a wide range of applications. G.722, on the other hand, is known for its low latency, reliability, and compatibility with legacy systems. Depending on your specific requirements and priorities, you may choose either Opus or G.722 for your audio encoding needs.