A simple way to transmit information via video
Fujitsu offers a simple way to add interactivity to a regular TV broadcast so that smartphone users without any additional technical devices (like all kinds of set-top boxes) can easily get additional information on the screen of their gadget.
The idea of transferring information is quite simple and somewhat similar to the well-known QR-scan - that is, on a smartphone you need to launch a special application and send the device to the TV. In a special way, the prepared program will contain video frames in which the TV screen becomes slightly brighter (or slightly darker): in other words, a sequence of successive video frames with varying degrees of brightness and will encode the binary information in the video signal — every second will contain 16 bits.
What are the benefits for such an offer? First of all, it is cheap because relatively simple software is required for proper editing of video files, and it can be easily integrated into existing editors.
Secondly, for the final consumer of a TV broadcast, there is also no need to buy anything in order to receive information of interest to him, if he needs it. Thirdly, the introduction of the coding described above does not affect the quality of the transmission (or rather, it is not noticeable to the eye), so the quality of the picture will remain the same.
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And finally, since, for example, in a news release, information can be transmitted for an arbitrarily long time (which may be indicated by a special marker), there is no longer a need to catch smartphone to read the QR code, which serves for similar purposes, which, however, can not be shown for a long time and which takes place in the picture of the video broadcast.
The original technology was designed by the Japanese to transmit video frames of video checksum to ensure that no one intervened in the broadcast and the consumer receives the original version of the picture, but the advertising idea again intervened, and the new technology will begin to be applied next year.
What the encoding looks like is shown in the video below:
[ Source ]
The idea of transferring information is quite simple and somewhat similar to the well-known QR-scan - that is, on a smartphone you need to launch a special application and send the device to the TV. In a special way, the prepared program will contain video frames in which the TV screen becomes slightly brighter (or slightly darker): in other words, a sequence of successive video frames with varying degrees of brightness and will encode the binary information in the video signal — every second will contain 16 bits.
What are the benefits for such an offer? First of all, it is cheap because relatively simple software is required for proper editing of video files, and it can be easily integrated into existing editors.
Secondly, for the final consumer of a TV broadcast, there is also no need to buy anything in order to receive information of interest to him, if he needs it. Thirdly, the introduction of the coding described above does not affect the quality of the transmission (or rather, it is not noticeable to the eye), so the quality of the picture will remain the same.
')
And finally, since, for example, in a news release, information can be transmitted for an arbitrarily long time (which may be indicated by a special marker), there is no longer a need to catch smartphone to read the QR code, which serves for similar purposes, which, however, can not be shown for a long time and which takes place in the picture of the video broadcast.
The original technology was designed by the Japanese to transmit video frames of video checksum to ensure that no one intervened in the broadcast and the consumer receives the original version of the picture, but the advertising idea again intervened, and the new technology will begin to be applied next year.
What the encoding looks like is shown in the video below:
[ Source ]
Source: https://habr.com/ru/post/155061/
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