Tag: EPG Mosaic
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The business value of EPG is that it is used very frequently, and usually the EPG is set to the boot interface. This high frequency of use allows EPG to generate advertising revenue. But EPG is a kind of text navigation after all, and this kind of text navigation can meet the needs of TV users for navigation for a long time? How to provide users with more intuitive, interactive and more attractive navigation methods?
In addition, from the day when digital TV entered the home, there was a kind of user response that never stopped: changing the station is slower than analog TV... This problem is related to the search frequency of the set-top box, the video encoding frame group structure of digital TV, etc. The change of the time is normal within two seconds, so some people simply turn the eyes to other places first, and then turn back when it appears again. Although the digital TV era offers 500 channels for users, if users really want to browse through the 500 channels, they really need some patience. So how can you help users quickly and intuitively choose to watch programs from hundreds of programs?
solution
The mosaic system can divide multiple small screens on the end user's screen while displaying multiple different TV programs. The user only needs to move the cursor through the remote controller, and can listen to the sound of a certain picture (ie, a certain program), and can switch to the normal viewing of the picture, so that 100 channels can be browsed after 5 times. Operators can also categorize programs in advance, such as placing all CCTV programs on the same screen and placing all entertainment channels on the same screen. It is more convenient for TV viewers to easily select their favorite programs from hundreds of programs, and In the context of EPG text navigation, this multi-screen mosaic-based image browsing and image navigation method is obviously more interactive, intuitive and more attractive.
The mosaic system consists of a multi-picture generator and an EPG, and generates a corresponding video and audio code stream and SI, PSI containing a mosaic descriptor. The plan is as follows:
Digital TV Mosaic System Solution Diagram
The core device in the solution is a multi-picture generator. Taking the NV820 as an example, the front-end user can select 20 programs from the input multiple SPTS or MPTS through the operation interface, and combine with the audio programs corresponding to the program. The Navigator performs demultiplexing, video decoding, segmentation, compositing, background and character superposition, encoding, audio selection, synchronization processing according to the user's settings, and re-multiplexes to generate an output with one video, multiple audios, and containing mosaic SI. flow. The multi-screen generator internal function modules are as follows:
functional module
The EPG is used in the system to cooperate with the multi-picture generator to generate a mosaic descriptor in the PSI, describing the characteristics of each sub-picture and the frequency and channel of the corresponding program.
The output of the NV820 multi-picture generator is 1.5 to 15 Mbps. Usually, a multi-picture takes up about 6-8 Mbps of bandwidth. Therefore, multiple NV820s can be multiplexed and modulated to occupy one frequency point, and can be transferred from one mosaic picture to the next by cascade transfer operation. Mosaic multi-screen to achieve navigation of all programs.
In order to facilitate user monitoring and connection with devices such as analog captioning machines, the NV820 provides a video output interface. Parameters can be configured via TCP/IP network, background changed, and output video effects monitored.
Value added point
The mosaic system not only supports more intuitive and attractive picture navigation, but also allows users to quickly flip through the program, but also has the following added value:
1. The mosaic system supports the display of text and graphics, giving operators a larger application space. Operators can easily introduce various types of business information to users.
2, advertising value-added applications: mosaic screen as a navigation screen, the highest frequency of occurrence, so you can define a larger screen logic unit in the mosaic, used to do professional advertising, high frequency can make the mosaic bring rich advertising revenue
3. Introduction platform for encrypted programs: The mosaic video navigation extracts the unencrypted digital code stream. The user can know the content played through the small mosaic screen without paying the fee, and stimulate the user's desire to purchase, which is convenient for the user to purchase.
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