Multimedia file playing method and playing device
A technology of a multimedia file and a playback method, which is applied in the field of multimedia file playback and playback devices, can solve the problems of low system compatibility, improper filtering of hidden data, and inability to apply files.
Active Publication Date: 2019-01-25
VIA TECH CHINA
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Problems solved by technology
However, the former proposal requires the use of software and hardware to detect files in advance and then synthesize the files, and the synthesized files must be stored in a specific file format, so the playback system for multimedia files must be able to support this file playback, but this has the inconvenience of synthesis and low system compatibility, because multiple file formats must be synthesized for users to choose according to the decoding capabilities of their systems, and the same file cannot be applied to various playback system
In addition, in the process of transmission or decoding, the embedded hidden data may be improperly filtered out due to the signal processing of high-pass filtering or low-pass filtering.
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[0017] Some typical embodiments that can realize the features and advantages of the present application will be described in detail in the description in the following paragraphs. It should be understood that this application can have various changes in different aspects, none of which departs from the scope of protection of the claims of the application, and the description and drawings therein are used for illustration in nature , but not to limit the application.
[0018] See figure 1 , which is a schematic functional block diagram of a multimedia file playing device developed in the present application, which includes a decoder 11 that decodes a multimedia file 100 to generate a piece of original digital audio data 101 . For example, the multimedia file 100 can be any common audio-visual file, such as MPG video, AVI video, RM / RMVB video, WMV video, MOV video or 3GP video, etc., and the corresponding decoder 11 can convert the The multimedia file 100 received in any form ...
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The present application is a multimedia file playback method and playback device. The method includes the following steps: decoding a multimedia file to generate a decoded original digital audio data; temporarily storing the decoded original digital audio data in a buffer. in the space; place a hidden data in the original digital audio data to form a piece of original digital audio data embedded with hidden data; perform digital-to-analog processing on the original digital audio data embedded with hidden data to generate a Analog sound signals; and use the analog sound signals to drive a speaker to emit sounds containing the hidden data.
Description
technical field [0001] The present application relates to a playing method and a playing device of a multimedia file, in particular to a playing method and a playing device of a multimedia file which can be applied to broadcast information by using hidden data. Background technique [0002] With the popularization and parity of audio-visual playback systems, many flat-screen advertising billboards in public places have been replaced by flat-panel displays and related sound playback devices with variable content that can be switched at any time, and then advertisements are presented in the form of multimedia. In order to be able to receive relevant advertising information (such as product introduction URLs, online shopping webpages, etc.) In the original audio file, when the multimedia file is played, the user's smart phone, tablet computer and other devices can directly receive the relevant advertising information played in the form of sound. [0003] The known synthesis me...
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IPC IPC(8): G11C7/16
CPCG11C7/16
Inventor 常祥彭子谨黄宗庆陈咏旻
Owner VIA TECH CHINA