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Device-initiated codec rate changes during voice calls

A codec rate and encoding technology, which is applied in the field of codec rate change, can solve problems such as call loss, channel condition fluctuation, and failure to successfully send vocoder packets

Active Publication Date: 2018-12-28
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, channel conditions may fluctuate over time, and a wireless communication device may experience a variety of different conditions during a communication session
For example, a wireless communication device participating in a call may enter an area with poor RF conditions during the call and may be unable to successfully transmit encapsulated vocoder packets encoded at the codec rate selected during the call setup phase
This failure to successfully send the encapsulated vocoder packet can lead to call interruption and in some cases even loss of the call, thus negatively impacting the user experience

Method used

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  • Device-initiated codec rate changes during voice calls
  • Device-initiated codec rate changes during voice calls
  • Device-initiated codec rate changes during voice calls

Examples

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Embodiment Construction

[0023] Various exemplary embodiments disclosed herein may enable a wireless communication device to more easily adapt to changing channel conditions during a VoIP call, such as a VoLTE call, thereby improving user experience. In this regard, some exemplary embodiments provide a wireless communication device configured to respond to a determination that a channel quality observed by the wireless communication device satisfies a defined threshold for requesting a codec rate change to request a codec rate change during a call. For example, if channel conditions drop during a call, the wireless communication device of some example embodiments may initiate a codec rate change to a lower codec rate to enable successful transmission of encoded speech data under reduced channel conditions. Thus, user experience can be improved by reducing audio interference and call drops. Additionally, in some exemplary embodiments, if channel conditions improve to the point where a higher codec rat...

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Abstract

The present invention discloses a method for initiating a codec rate change by a wireless communication device during a VoIP call. The method may include the wireless communication device establishing a first codec rate for the VoIP call during a call setup phase; encoding voice data for transmission using the first codec rate during a first portion of the VoIP call; determining to use Channel quality at the first codec rate; determining that the channel quality satisfies a threshold for requesting a codec rate change; requesting a codec rate change from the first codec rate to a second codec rate in response to the channel quality satisfying the threshold; and encoding the voice data for transmission using the second codec rate during a second portion of the VoIP call.

Description

technical field [0001] The described embodiments relate generally to communication technologies, and more particularly to codec rate changes initiated by wireless communication devices during Voice over Internet Protocol (VoIP) calls. Background technique [0002] Wireless communication devices participating in a VoIP call, such as a Voice over Long Term Evolution (VoLTE) call, may use an audio codec to encode and decode audio data exchanged during the call. An audio codec may have a codec rate, which may define the bit rate used to encode the audio data, and thus define the rate at which audio data samples (typically 20 milliseconds of audio data in a VoLTE call) are encoded at the codec rate. ) is the size of the audio data packet obtained by encoding. [0003] The amount of data that a wireless communication device can transmit and / or receive over a wireless link available to support a VoIP call may depend on radio frequency (RF) channel conditions. Likewise, the codec ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/811
CPCH04L65/80H04L47/38H04L65/764H04L65/65H04W24/08H04W28/0236H04L65/75H04L65/762
Inventor S·肯-以巴特S·V·万格拉S·瓦拉斯T·塔贝特
Owner APPLE INC