What is the bandwidth requirement for media using g.729a codec

If you want slightly better audio quality, you can use this codec with less compression. But that will require Kbps or Kbps of bandwidth per line. But this codec is a good choice if you need high definition audio quality.

At the highest compression rate, this codec requires only 32Kbps per line. If you have more bandwidth and want better audio quality, you can use up to Kbps per line. This codec works well if you want the option of increasing compression to temporarily add more VoIP lines using the same amount of bandwidth.

At the highest compression rate, this codec requires just But, typically, this codec requires 16Kbps or The impressive thing about the G. This codec is a very good choice if you need to connect high volumes of VoIP lines. The audio quality is high enough for business calls. And the bandwidth requirements are low enough to make efficient use of your internet connection.

And, based on the rough estimate of Kbps of bandwidth per line, you could support a few VoIP lines with 0. For a more specific calculation, use this VoIP bandwidth calculator.

Therefore, if you have nine VoIP lines, using the G. A more specific bandwidth requirement calculation will enable you to use your internet connection much more cost efficiently for VoIP calling.

It also saves you from having insufficient bandwidth for all the VoIP lines you need. To provide more benefits the codec has been extended with various features, designated at G. However, DTMF tones, Fax transmissions and high-quality audio cannot be transported with this algorithm. It requires less computational power than G. However, lower complexity results in reduced speech quality.

This speech codec codes speech and audio signals that are used in multimedia applications at 8 kbps. It is useful to detect voice activity in the signal. DTX Discontinuous Transmission module is also included to increase the overall efficiency. DTX is a method that allows momentarily to power-down or mute the telephone if there is no voice input. It is necessary because speakers may think that the link has been cut if it goes quite in case of no speech. In these cases CNG ensures that an analog hiss is simulated to make the receiver sure that the link is active.

Net developers. In that case, the header is twice the size of the payload. Figure 2. In addition, sRTP provides message authentication, integrity checking, and protection against replay attacks.

Voice Activity Detection Voice Activity Detection VAD is a technology that works with the human nature of voice conversations, mainly that one person listens while the other talks. VoIP Bandwidth Requirements The amount of bandwidth required varies by the codec and the transmission media.

Table 1. Table 2. Explanation of Terms Codec Bit Rate kbps Based on the codec, this is the number of bits per second that need to be transmitted to deliver a voice call. For example, the G. Codec Sample Interval ms This is the sample interval at which the codec operates. With MOS, a wide range of listeners judge the quality of a voice sample on a scale of one bad to five excellent. The scores are averaged to provide the MOS for the codec.

Voice Payload Size Bytes The voice payload size represents the number of bytes or bits that are filled into a packet. The voice payload size must be a multiple of the codec sample size. For example, G. Voice Payload Size ms Payload Size ms The voice payload size can also be represented in terms of the codec samples. For example, a G. For example, for a G. The following codecs are supported: Table 4. Enter your password if prompted.

Step 3 dial-peer voice number voip Example: Device config dial-peer voice 1 voip Enters dial peer configuration mode for the specified VoIP dial peer. Step 5 Do the following to configure a video codec: video codec codec Example: For Video Codec Device config-dial-peer video codec h Configures a video codec at the dial peer level. Step 3 voice class codec tag Example: Device config voice class codec 10 Enters voice-class configuration mode for the specified codec voice class.

This becomes part of a preference list Step 5 exit Example: Device config-class exit Exits the current mode. Step 6 dial-peer voice number voip Example: Device config dial-peer voice 1 voip Enters dial peer configuration mode for the specified VoIP dial peer.

Step 7 voice-class codec tag offer-all Example: Device config-dial-peer voice-class codec 10 Applies the previously configured voice class and associated codecs to a dial peer. Step 4 video codec codec Example: video codec h Configures a video codec within the voice class. Step 5 exit Example: Device config-class exit Exits the current mode. Step 7 voice-class codec tag offer-all Example: Device config-dial-peer voice-class codec 10 Applies the previously configured codec voice class and associated codecs to a dial peer.

Was this Document Helpful? Yes No Feedback. Codec Bit Rate kbps. Based on the codec, this is the number of bits per second that need to be transmitted to deliver a voice call. Codec Sample Size Bytes. Size Bytes Based on the codec, this is the number of bytes captured by the digital signal processor DSP at each codec sample interval. Codec Sample Interval ms. This is the sample interval at which the codec operates. MOS is a system of grading the voice quality of telephone connections.

Voice Payload Size Bytes. The voice payload size represents the number of bytes or bits that are filled into a packet. Voice Payload Size ms. Payload Size ms The voice payload size can also be represented in terms of the codec samples. PPS represents the number of packets that need to be transmitted every second in order to deliver the codec bit rate. AACLD bps. GK bps. Transparent; uses the endpoint codec.