Method and system for realizing Android intelligent mobile terminal voice communication

Abstract

The invention provides a method and system for realizing Android intelligent mobile terminal voice communication. The method comprises the steps of: a, creating a PCM (Pulse Code Modulation) voice transmission channel and a command control channel from an application layer to a communication module; b, reading downlink voice data of the communication module by the PCM voice module, after carrying out coding format transformation, playing through an Android system audio output interface; and c, acquiring voice data by the PCM voice module through the Android system audio input port, after carrying out coding format transformation, sending to the communication module and realizing sending of uplink voice data. The invention is simple and rapid in realization, has high modularization degree, greatly saves hardware cost and development resources, and has good system compatibility so as to be convenient for popularization of the voice call function of the communication module under Android.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for realizing voice calls of Android smart mobile terminals. Background technique [0002] PCM (pulse code modulation), that is, pulse code modulation. It is a digital signal representation generated after the audio analog signal is sampled, quantized, and encoded. Pulse code modulation was developed in the late 1970s. CD, one of the recording media, was jointly launched by Philips and Sony in the early 1980s. The audio format of pulse code modulation is also adopted by DVD-A, which supports stereo and 5.1 surround sound, and was released and introduced by the DVD Symposium in 1999. The bit rate of pulse code modulation develops from 14-bit to 16-bit, 18-bit, 20-bit until 24-bit; the sampling frequency develops from 44.1kHz to 192kHz. [0003] The original meaning of the word Android refers to "robot", and it is also the name of the open source mobil...

AI Technical Summary

Problems solved by technology

This makes the solution not universal, or some design schemes simply give up the realization of the voice function, and the customer modifies it by himself for secondary development

Difficult to develop

[0008] 2. Due to the different audio codecs of the communication modules, modulator / demodulator (Codec) devices from different manufacturers need to be used, as well as the driver development of the device and the debugging of input / output devices, making development difficult

[0009] 3. Due to the use of hardware connections, it is necessary to process the audio data of different input / output devices and the mutual transmission between communication modules, and it also needs to support the software implementation of functions such as system sound volume control, which increases the need for software / hardware. design difficulty

[0010] 4. Due to the adoption of the above implementation scheme, the management of audio devices supported by the Android system, multiplexing, routing of audio streams, sound policy control, dynamic switching of input / output devices, multi-channel audio parallel processing, etc. are lost. A series of new features; reduced system compatibility and system friendliness

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