Voice broadcasting method and device based on DAC (Digital-to-Analog Converter)
A voice broadcasting and playback device technology, which is applied in audio data retrieval, audio data indexing, digital recording/reproduction, etc., can solve the problems of high price, inability to realize voice broadcasting, difficulty in chip selection, etc., so as to reduce development costs, voice Smooth broadcasting and resource-rich effects
Inactive Publication Date: 2021-10-08
SHENZHEN TRENDIT CO LTD
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Problems solved by technology
[0004] In the prior art, most of the 4G communication modules support the voice broadcast function, but when the product is a single WIFI version, the voice broadcast cannot be realized without using the 4G communication module; there are not many security master chips that support the voice broadcast function in the POS machine field , and the price is relatively expensive, it is very difficult to select the chip type during product development
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[0042] In order to make the purpose, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0043] refer to figure 1 , which shows a DAC-based voice broadcast method provided by an embodiment of the present application, the method is used for voice broadcast of a POS machine, wherein a DAC converter is provided in the POS machine;
[0044] The methods include:
[0045] S110. Obtain the file index number and file data address of the target audio file;
[0046] S120. Read the target audio file ...
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Abstract
The invention provides a voice broadcasting method based on DAC. The method comprises the following steps: acquiring a file index number and a file data address of a target audio file; reading a target audio file from a sound source library according to the file index number and the file data address, and storing target audio file data in a cache queue; reading audio data with a preset length from the cache queue in a direct memory access mode; and converting the read audio data with the preset length into an analog signal through a DAC converter, and sending the analog signal to a playing device for voice broadcasting. The audio data is read from the cache queue in a direct memory access mode, so that the problem of playing lagging is avoided, and voice broadcasting is smoother; and voice broadcasting is carried out through the DAC converter in the POS machine, automatic transmission of audio data in the POS machine is realized, a voice broadcasting function independent of a 4G communication module is realized, a main control chip which supports the voice broadcasting function and is richer in resource does not need to be used, and the development cost of the POS machine can be effectively reduced.
Description
technical field [0001] The present application relates to the technical field of voice broadcasting, in particular to a DAC-based voice broadcasting method and device. Background technique [0002] With the rapid development of mobile payment, traditional POS is also being upgraded. Supporting mobile payment on WeChat and Alipay platforms is the focus of upgrading. In order to enable merchants and customers to obtain a better experience, live voice broadcast is undoubtedly a must-have function. When merchants and customers make transactions, with live voice broadcast, they can know more intuitively whether the transaction is successful or not, without waiting for the transaction result returned by the mobile phone. [0003] At present, the more common method is to use the voice broadcast function of the main control chip or 4G communication module. We burn the audio source file to be broadcast into Flash, find the audio file to be played in Flash, and then issue the playbac...
Claims
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Login to View More IPC IPC(8): G06F16/61G11B20/10
CPCG06F16/61G11B20/10527
Inventor 胡伟胡圣彭学斌
Owner SHENZHEN TRENDIT CO LTD