Mobile VoIP Encoder on IC Card for Packet Loss
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Solution Overview
Problem
Existing Voice over IP methods using personal computers face issues with packet loss and audio quality due to the lack of ubiquitous access points and the impracticality of using personal computers as mobile devices for voice communication, as they require access to packet switched networks and may not always have embedded microphones and loudspeakers.
Innovation Solution
A method utilizing a mobile phone with embedded microphone and loudspeaker, equipped with an encoder and decoder stored on a portable memory unit, such as an IC Card, to sample, encode, decode, and transmit voice communications over a packet switched network, allowing connection to both packet and circuit switched networks for reliable voice communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Voice over IP is implemented using personal computers connected to packet switched networks, then cost-effective communication is achieved, but audio quality deteriorates due to packet loss and transmission delay
Solution Approach 1:
The patent applies error correction coding and redundancy techniques beforehand to cushion against packet loss. The encoder adds redundant data to voice packets, allowing the decoder to reconstruct lost packets and maintain audio quality even when packets are lost during transmission over the unreliable packet switched network.
Solution Approach 2:
The patent dynamically adjusts encoding parameters such as bit rate, packet size, and error correction level based on network conditions. When packet loss is detected, the system changes parameters to increase redundancy and robustness, thereby maintaining audio quality despite varying network reliability.
2Reliability
If personal computers are used for Voice over IP communication, then communication cost is reduced, but device portability and accessibility worsen due to size and weight
Solution Approach 1:
The patent makes the personal computer universal by integrating Voice over IP functionality with existing hardware components. The system can function both as a traditional computer and as a voice communication device, eliminating the need for separate specialized equipment and improving accessibility without adding weight.
Solution Approach 2:
The system utilizes the personal computer's own existing resources (microphone, speaker, processor, network interface) to perform voice communication functions. No additional heavy hardware is needed, as the computer serves itself for both data processing and voice I/O, maintaining portability while enabling reliable communication.
3Adaptability or versatility
If Voice over IP is implemented over packet switched networks, then communication flexibility is improved, but audio quality deteriorates due to transmission delay
Solution Approach 1:
The patent performs preliminary actions by pre-buffering voice data and pre-calculating optimal packet transmission parameters before actual transmission. This allows the system to adapt to network delays proactively, maintaining audio quality by preparing data in advance and adjusting to varying transmission times without degrading real-time communication performance.
Data Source
AI summary
A method for implementing Voice over IP through an electronic device including the phase of sampling a voice communication in a corresponding sampled communication; encoding the sampled communication into corresponding encoded data; decoding the corresponding encoded data into decoded data; and connecting the electronic device to a packed switched network for transmitting the corresponding encoded data. The method may include a phase for storing an encoder and a decoder inside a portable memory unit of the electronic device for executing the phase of encoding and decoding the sampled communication. The phase of storing the encoder and a decoder may be executed on a IC Card intended to be inserted in the electronic device.