What isG.728

G.728 Speech Coding Standard

G.728 is a speech coding standard that was developed by ITU-T to encode voice and transmit it at 16 kbps. It uses Low-Delay Code Excited Linear Prediction technology, which basically means that the delay of the codec is only 5 samples (0.625 ms). G.728 is an efficient codec, which helps to improve the overall quality of videoconferencing by using more bandwidth for video when it is used as the audio algorithm.

Key Features

  • Speech coding at 16 kbps
  • Low-Delay Code Excited Linear Prediction technology used
  • Delay of the codec is only 5 samples (0.625 ms)
  • Linear prediction computed backwards using a linear predictive coding filter of order 50
  • Excitation generated with a gain-scaled VQ
  • Passes low bit rate modem signals up to 2400 bits/s
  • Complexity of the codec is 30 MIPS
  • Codebooks require 2 kilobytes of RAM
  • Average opinion rating for G.728 is 3.61

Uses

G.728 is an essential codec for videoconferencing and other systems that transmit voice. It is extremely efficient, and when properly negotiated, it ensures that only 16 kbps is used for the audio channel, leaving more bandwidth available for video. This results in a better overall quality videoconference.

FAQ

What is G.728?

G.728 is a speech coding standard developed by ITU-T for encoding voice and transmitting it at 16 kbps.

How does G.728 work?

G.728 uses Low-Delay Code Excited Linear Prediction technology to encode speech. It has a delay of only 5 samples (0.625 ms), and the excitation is generated with a gain-scaled VQ. G.728 also passes low bit rate modem signals up to 2400 bits/s.

What is the average opinion rating for G.728?

The average opinion rating for G.728 is 3.61.

Conclusion

G.728 is an important speech coding standard that is essential for videoconferencing and other systems that transmit voice. Its efficiency and ability to negotiate with other systems ensures that the available bandwidth is used optimally, resulting in better overall quality videoconferencing experiences.

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