CN111163312A - Signal source synchronous detection method - Google Patents
Signal source synchronous detection method Download PDFInfo
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- CN111163312A CN111163312A CN202010102886.6A CN202010102886A CN111163312A CN 111163312 A CN111163312 A CN 111163312A CN 202010102886 A CN202010102886 A CN 202010102886A CN 111163312 A CN111163312 A CN 111163312A
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- H04N17/00—Diagnosis, testing or measuring for television systems or their details
Abstract
The invention relates to a signal source synchronous detection method, which is used for detecting the synchronism of each part of a signal source in a distributed spliced display picture, and comprises the following steps: generating a plurality of original signal frames successively, each frame comprising n portions, each portion comprising a common feature; the number of n is the same as that of the decoders, and n is larger than 1; continuously inputting the plurality of original signal frames to an encoder; the encoder encodes the received original signal frame into n portions, each portion containing the common characteristic; sequentially transmitting data to each decoder, wherein the data comprises one coding part; each decoder decodes the received data, outputs the decoded content to the corresponding screen, and displays the decoded content on the corresponding screen. The invention can intuitively and effectively solve the problem of synchronous detection of the synchronism of each part of the signal source in the distributed spliced display picture in the prior art.
Description
Technical Field
The invention relates to a signal source synchronous detection method and a signal source synchronous detection system, which are used for detecting the synchronism of each part of a signal source in a distributed spliced display picture.
Background
In the existing distributed tiled display technology, as shown in fig. 1, an encoder divides an x-th frame original signal into 4 parts for encoding, that is, encodes the x-th frame original signal into 4 parts, each part is respectively sent to a corresponding decoder for decoding, the decoded content is sent to each screen, and each screen is tiled together to display the whole x-th frame original signal. The encoder may encode the original signal of the xth frame into the same number of parts as the number of decoders according to the number of decoders.
However, when the original signal needs to be displayed on the screen 2 × 2 in the figure, the sequence of each encoded part sent by the encoder, the fluctuation of the network, and the difference of the decoder performance all cause the decoder to receive the corresponding part of the same frame of picture of the original signal, and the time is not consistent or not necessary, but the prior art lacks a method for intuitively and effectively detecting whether the pictures of the decoders are synchronized.
Disclosure of Invention
In view of the above problems, an aspect of the present invention provides a signal source synchronization detection method, which can detect synchronicity of each part of a signal source in a distributed tiled display screen, where the method includes:
generating a plurality of original signal frames successively, each frame comprising n portions, each portion comprising a common feature; the number of n is the same as that of the decoders, and n is larger than 1;
continuously inputting the plurality of original signal frames to an encoder;
the encoder encodes the received original signal frame into n portions, each portion containing the common characteristic;
sequentially transmitting data to each decoder, wherein the data comprises one coding part;
each decoder decodes the received data, outputs the decoded content to the corresponding screen, and displays the decoded content on the corresponding screen.
A second aspect of the present invention provides a signal source synchronous detection system, which can detect synchronicity of each part of a signal source in a distributed tiled display screen, the signal source synchronous detection system including: a signal generator, an encoder and n decoders, n being greater than 1;
the signal generator is used for continuously generating a plurality of original signal frames, enabling each frame to comprise n parts, enabling each part to contain a common characteristic, and continuously inputting the original signal frames to the encoder;
the encoder is configured to encode a received original signal frame into n parts, each part including the common feature, and to transmit data to each decoder in turn, the data including one of the encoded parts;
each decoder is used for decoding the received data, outputting the decoded content to the corresponding screen and displaying the decoded content by the corresponding screen.
The invention can intuitively and effectively solve the problem of synchronous detection of all parts of the signal source in the distributed spliced display picture in the prior art.
Drawings
FIG. 1 illustrates a schematic diagram of a signal source synchronization detection system according to some embodiments of the invention;
FIG. 2 shows a plurality of original signal frames generated successively by a signal generator;
fig. 3 illustrates a flow diagram of a signal source synchronization detection method according to some embodiments of the invention.
Detailed Description
The invention will now be described, by way of example, with reference to the accompanying drawings, in connection with which it is to be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Additionally, the described embodiments are intended to be illustrative of some, but not all embodiments of the invention.
Fig. 1 illustrates a signal source synchronization detection system that can detect synchronicity of portions of a signal source in a distributed tiled display according to some embodiments of the present invention, the signal source synchronization detection system comprising: a signal generator 10, an encoder 11 and n decoders (21-24), n being greater than 1.
The signal generator 10 is configured to successively generate a plurality of original signal frames such that each frame includes n parts each including a common feature, and successively input the plurality of original signal frames to the encoder 11. As shown in fig. 2, three consecutive frames of the original signal are shown (x, x +1 and x +2 frames), each frame comprising 4 parts, each part containing the same number (1, 2 or 3). Furthermore, according to some embodiments of the invention, the common feature may be a common color or a common symbol, or any two-by-two combination or three combination of colors, symbols or numbers.
The encoder 11 is configured to encode the received original signal frame into n parts, each part including the common characteristic, and to transmit data to each decoder in turn, the data including one of the encoded parts. As shown in fig. 2, the encoder encodes the original signal frame containing 4 1 s into 4 parts, each part containing the common feature 1. The encoder sends data to each decoder in turn, the data comprising one of the encoded portions, one of which is previously encoded into one of 4 portions.
Each decoder is used for decoding the received data, outputting the decoded content to the corresponding screen and displaying the decoded content by the corresponding screen. As shown in fig. 1 and 2, under normal synchronization, the output content of each decoder is a portion containing the common features, and the screen output of fig. 1 contains the picture content of 1. In the asynchronous case, the picture contents output by the screens are inconsistent. For example, in the asynchronous case, when three screens all receive a part of the x +1 th frame signal, that is, all receive the picture content containing 2, one of the screens may still stay in the original x-th frame image, that is, still receive signal 1, and at this time, it can be intuitively and effectively determined that the screens are asynchronous.
According to some embodiments of the present invention, the signal source synchronous detection system may further include a camera and an image recognition device; the camera shoots photos containing all screens and sends the photos to the image recognition equipment, the image recognition equipment recognizes the content displayed on each screen from the photos, compares the content displayed on each screen, and if the content displayed on each screen is different from the content displayed on each screen, makes asynchronous judgment, and if the content displayed on each screen is the same as the content displayed on each screen, makes synchronous judgment. The camera may be a web camera.
According to some embodiments of the present invention, the image recognition apparatus stores in advance a relative distribution range of each screen, and determines a correspondence relationship between each portion on the photograph and the screen based on the distribution range, thereby recognizing the content displayed on each screen from the photograph.
Fig. 3 illustrates a flow diagram of a signal source synchronization detection method that can detect synchronicity of portions of a signal source in a distributed tiled display according to some embodiments of the present invention. The synchronous detection method comprises S1, S2, S3, S4 and S5:
s1, continuously generating a plurality of original signal frames to enable each frame to comprise n parts, wherein each part comprises a common characteristic; the number of n is the same as that of the decoders, and n is larger than 1.
For example, a plurality of original signal frames may be generated in succession by the signal generator 10, such that each frame comprises n portions, each portion containing a common feature, which may be a common color or a common sign, or any two-by-two or three combination of colors, signs or numbers.
And S2, continuously inputting the plurality of original signal frames to an encoder.
The plurality of frames (x, x +1 and x +2 frames) shown in FIG. 2 are generated as input continuously to the encoder
And S3, the encoder encodes the received original signal frame into n parts, so that each part contains the common characteristics.
As shown in fig. 1, the encoder encodes an original signal frame containing 4 1 s into 4 parts, each part containing the common feature 1.
S4, the encoder sequentially sends data to each decoder, wherein the data comprises one coding part;
the one of the encoded portions is one of the n portions encoded in step S3.
And S5, each decoder decodes the received data, outputs the decoded content to a corresponding screen and displays the decoded content on the corresponding screen.
As shown in fig. 1 and 2, under normal synchronization, the output content of each decoder is a portion containing the common features, and the screen output of fig. 1 contains the picture content of 1. In the asynchronous case, the picture contents output by the screens are inconsistent. For example, in the asynchronous case, when three screens all receive a part of the x +1 th frame signal, that is, all receive the picture content containing 2, one of the screens may still stay in the original x-th frame image, that is, still receive signal 1, and at this time, it can be intuitively and effectively determined that the screens are asynchronous.
According to some embodiments of the invention, the common characteristic comprises the same color. Therefore, the visual synchronous or asynchronous judgment effect can be visually provided for people.
According to some embodiments of the invention, the common characteristic comprises the same color.
According to some embodiments of the invention, the common features comprise the same number.
According to some embodiments of the invention, the common features comprise the same symbol.
According to some embodiments of the present invention, common features between a plurality of raw signal frames generated consecutively vary regularly. For example, for the common feature being color, it may be changed by the wavelength of the color, and by the difference between the colors, it may be judged how much the content displayed on one of the screens lags behind the other screen.
According to some embodiments of the invention, for the case where the common features are the same number; the number between a plurality of original signal frames generated consecutively may be incremented or decremented. Therefore, the asynchronous condition can be judged through the difference of the numbers.
According to some embodiments of the invention, the common feature comprises any two-by-two combination of numbers, symbols or colours, or the common feature comprises a combination of numbers, symbols and colours. Therefore, different users can conveniently observe the asynchronism in time according to the sensitivity of the users to the information.
According to some embodiments of the present invention, the signal source synchronization detection method may further include taking a picture including the screens and recognizing contents displayed on each screen from the picture, and comparing the contents displayed on each screen, and if the contents are found to be different from each other, making an asynchronous determination, and if the contents are found to be the same, making a synchronous determination.
According to some embodiments of the present invention, the signal source synchronous detection method further includes pre-storing a relative distribution range of each screen, and determining a correspondence between each portion on the photo and the screen according to the distribution range, so as to identify the content displayed on each screen from the photo.
The details of the signal source synchronous detection process or method involved in the signal source synchronous detection system of the present invention described above with reference to fig. 1-2 are also within the scope of the present invention and are not repeated herein for the sake of simplicity.
The invention can effectively solve the problem of synchronous detection of each part of the signal source in the distributed splicing display picture in the prior art, and a user can intuitively judge the synchronous condition of the picture on each screen by observing the screen or automatically judge the synchronous condition by the camera and the image recognition equipment. By setting a common feature, for example, as a number that is successively incremented, it is also possible to judge the specific asynchronous case of the pictures on the respective screens.
Claims (10)
1. A signal source synchronization detection method is used for detecting the synchronization of each part of a signal source in a distributed tiled display picture, and is characterized in that the method comprises the following steps:
generating a plurality of original signal frames successively, each frame comprising n portions, each portion comprising a common feature; the number of n is the same as that of the decoders, and n is larger than 1;
continuously inputting the plurality of original signal frames to an encoder;
the encoder encodes the received original signal frame into n portions, each portion containing the common characteristic;
sequentially transmitting data to each decoder, wherein the data comprises one coding part;
each decoder decodes the received data, outputs the decoded content to the corresponding screen, and displays the decoded content on the corresponding screen.
2. The method of claim 1, wherein the common characteristic comprises a same color; alternatively, the common features include the same number; alternatively, the common features comprise the same symbol; alternatively, the common features include any two-by-two combination of numbers, symbols, or colors; alternatively, the common features include a combination of numbers, symbols, and colors.
3. The method of claim 1, wherein common features between a plurality of raw signal frames generated in succession vary regularly.
4. The method of claim 1, wherein the common features comprise the same number; digital increments or decrements between a plurality of raw signal frames generated consecutively.
5. The method according to any one of claims 1 to 4, further comprising taking a photograph containing the respective screens and identifying from the photograph the content displayed on each screen and comparing the content displayed on each screen, and if found to be different from each other, making a determination of non-synchronization, and if found to be the same, making a determination of synchronization.
6. The method according to claim 5, further comprising previously storing a relative distribution range of each screen, and determining a correspondence between each portion on the photograph and the screen based on the distribution range, thereby recognizing the content displayed on each screen from the photograph.
7. A signal source synchronous detection system is used for detecting the synchronism of each part of a signal source in a distributed spliced display picture, and is characterized by comprising: a signal generator, an encoder and n decoders, n being greater than 1;
the signal generator is used for continuously generating a plurality of original signal frames, enabling each frame to comprise n parts, enabling each part to contain a common characteristic, and continuously inputting the original signal frames to the encoder;
the encoder is configured to encode a received original signal frame into n parts, each part including the common feature, and to transmit data to each decoder in turn, the data including one of the encoded parts;
each decoder is used for decoding the received data, outputting the decoded content to the corresponding screen and displaying the decoded content by the corresponding screen.
8. The system of claim 7, wherein common features between a plurality of raw signal frames generated in succession vary regularly.
9. The system of claim 7 or 8, further comprising a camera and an image recognition device; the camera shoots photos containing all screens and sends the photos to the image recognition equipment, the image recognition equipment recognizes the content displayed on each screen from the photos, compares the content displayed on each screen, and if the content displayed on each screen is different from the content displayed on each screen, makes asynchronous judgment, and if the content displayed on each screen is the same as the content displayed on each screen, makes synchronous judgment.
10. The system according to claim 9, wherein the image recognition device stores in advance a relative distribution range of each screen, and determines correspondence between each part on the photograph and the screen based on the distribution range, thereby recognizing the content displayed on each screen from the photograph.
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| CN113676722A (en) * | 2021-07-21 | 2021-11-19 | 南京巨鲨显示科技有限公司 | Video equipment image frame testing method and time delay measuring method |
| CN114143533A (en) * | 2021-11-24 | 2022-03-04 | 威创集团股份有限公司 | Testing method, device, equipment and storage medium for synchronous display of spliced screen |
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Application publication date: 20200515 |