CN113747201B - Image playing system and image data transmission device and method with synchronous data transmission mechanism - Google Patents
Image playing system and image data transmission device and method with synchronous data transmission mechanism Download PDFInfo
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- CN113747201B CN113747201B CN202010461164.XA CN202010461164A CN113747201B CN 113747201 B CN113747201 B CN 113747201B CN 202010461164 A CN202010461164 A CN 202010461164A CN 113747201 B CN113747201 B CN 113747201B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 253
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 20
- 208000032370 Secondary transmission Diseases 0.000 claims abstract description 25
- 208000032369 Primary transmission Diseases 0.000 claims description 22
- 238000010586 diagram Methods 0.000 description 8
- 230000008054 signal transmission Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23602—Multiplexing isochronously with the video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
An image data transmission device with synchronous data transmission mechanism. The main image data transmission circuit transmits a main alignment signal and receives a secondary alignment signal at main transmission and reception time points respectively to calculate a main time difference, and enables a main timing of the main alignment signal as a main data transmission timing. The secondary image data transmission circuit respectively transmits a secondary alignment signal and receives a primary alignment signal at secondary transmission time points and receiving time points so as to calculate a secondary time difference, and the secondary time sequence of the secondary alignment signal is used as a secondary data transmission time sequence after being adjusted by a time sequence adjustment quantity, wherein the time sequence adjustment quantity adjusts the primary time difference and the secondary time difference to be equal. The primary and secondary image data transmission circuits perform synchronous image data transmission with the image data receiving device according to the primary and secondary data transmission time sequences.
Description
Technical Field
The present invention relates to image transmission technology, and more particularly, to an image playing system and an image data transmission device and method with a synchronous data transmission mechanism.
Background
Some consumer electronic products such as televisions and smart phones are becoming popular with consumers due to their entertainment properties, and therefore have ever increasing specifications. Taking liquid crystal electricity as an example, since televisions with large screens can provide better viewing experience, television sizes in recent years are gradually evolving from 50 inches to over 70 inches.
In such large-sized televisions, a plurality of image data transmission chips are often required to provide image data corresponding to different panel areas to the panel for playing. However, such a design requires that the image data transmission chip transmit the synchronized image data to the panel for playing. Therefore, an accurate synchronous data transmission mechanism must be provided between the image data transmission chips, so that the panel can correctly receive and play the image data transmitted by the image data transmission chips.
Disclosure of Invention
In view of the foregoing problems, the present invention is directed to an image playing system and an image data transmission device and method with a synchronous data transmission mechanism, so as to improve the prior art.
An object of the present invention is to provide an image data transmission device with a synchronous data transmission mechanism, which includes: a primary image data transmission circuit and a secondary image data transmission circuit. The main image data transmission circuit is configured to: generating and transmitting a primary alignment signal at a primary transmission time point and receiving a secondary alignment signal at a primary reception time point; calculating a primary time difference between primary transmission time points and primary reception time points; and making the main timing of the main alignment signal the main data transfer timing. The secondary image data transmission circuit is coupled to the primary image data transmission circuit and is configured to: generating and transmitting a secondary alignment signal at a secondary transmission time point and receiving a primary alignment signal at a secondary reception time point; calculating a secondary time difference between the secondary transmission time points and the secondary reception time points; and adjusting the secondary timing of the secondary alignment signal by a timing adjustment amount to serve as a secondary data transmission timing, wherein the timing adjustment amount is configured to adjust the primary time difference and the secondary time difference to be equal. The main image data transmission circuit and the secondary image data transmission circuit respectively perform synchronous image data transmission with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence so that the image data receiving device plays images accordingly.
Another embodiment of the present invention provides an image playing system, which includes: image data receiving device and image data transmitting device. The image data transmission device is coupled to the image data receiving device and comprises: a primary image data transmission circuit and a secondary image data transmission circuit. The main image data transmission circuit is configured to: generating and transmitting a primary alignment signal at a primary transmission time point and receiving a secondary alignment signal at a primary reception time point; calculating a primary time difference between primary transmission time points and primary reception time points; and making the main timing of the main alignment signal the main data transfer timing. The secondary image data transmission circuit is coupled to the primary image data transmission circuit and is configured to: generating and transmitting a secondary alignment signal at a secondary transmission time point and receiving a primary alignment signal at a secondary reception time point; calculating a secondary time difference between the secondary transmission time points and the secondary reception time points; and adjusting the secondary timing of the secondary alignment signal by a timing adjustment amount to serve as a secondary data transmission timing, wherein the timing adjustment amount is configured to adjust the primary time difference and the secondary time difference to be equal. The main image data transmission circuit and the secondary image data transmission circuit respectively perform synchronous image data transmission with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence so that the image data receiving device plays images accordingly.
Another object of the present invention is to provide an image data transmission method with a synchronous data transmission mechanism, which is applied to an image data transmission device, and an embodiment of the present invention includes: the main image data transmission circuit generates and transmits a main alignment signal at a main transmission time point and receives a secondary alignment signal at a main receiving time point; causing the primary image data transmission circuit to calculate a primary time difference between the primary transmission time point and the primary reception time point; the main image data transmission circuit is used for enabling the main time sequence of the main alignment signal to be used as the main data transmission time sequence; the secondary image data transmission circuit generates and transmits a secondary alignment signal at a secondary transmission time point and receives a primary alignment signal at a secondary receiving time point; causing the secondary image data transmission circuit to calculate a secondary time difference between the secondary transmission time point and the secondary reception time point; the secondary image data transmission circuit is used for adjusting the secondary time sequence of the secondary alignment signal by a time sequence adjustment amount to be used as a secondary data transmission time sequence, wherein the time sequence adjustment amount is configured to adjust the primary time difference and the secondary time difference to be equal; and enabling the main image data transmission circuit and the secondary image data transmission circuit to synchronously transmit the image data with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence respectively so that the image data receiving device plays the image accordingly.
The features, operation and effects of the present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an image playing system according to an embodiment of the invention;
FIG. 2A is a timing diagram showing the transmission of primary and secondary alignment signals between a primary and secondary image data transmission circuit according to one embodiment of the present invention;
FIG. 2B is a timing diagram showing the transmission of the primary alignment signal and the secondary alignment signal between the primary image data transmission circuit and the secondary image data transmission circuit according to another embodiment of the present invention;
FIG. 2C is a timing diagram showing transmission of the primary alignment signal and the secondary alignment signal between the primary image data transmission circuit and the secondary image data transmission circuit according to another embodiment of the present invention; and
fig. 3 is a flowchart of an image data transmission method with a synchronous data transmission mechanism according to an embodiment of the invention.
Symbol description:
100: image playing system
110: image data transmission device
120: image data receiving device
130A-130B: image data transmission circuit
300: image data transmission method
S310 to S370: step (a)
ALA: alignment of signals mainly
ALB: secondary alignment signal
DL: delay time
PD: main time difference
PR: primary reception time point
PT: primary transmission time point
SD: secondary time difference
SR: secondary reception time point
ST: secondary transmission time point
Detailed Description
The following examples are given in conjunction with the accompanying drawings, but the specific embodiments described are merely illustrative of the present invention and are not intended to limit the invention, nor should the description of the structure operate to limit the order in which the components may be rearranged to produce a device with equivalent efficacy, and are within the scope of the present invention.
An objective of the present invention is to provide an image playing system and an image data transmission device and method with a synchronous data transmission mechanism, which can judge the time sequence difference between the primary and secondary image data transmission circuits through the signal transmission and time difference between the primary and secondary image data transmission circuits, and further adjust the time sequence of the secondary image data transmission circuit to align the time sequence of the primary image data transmission circuit, so as to achieve the purpose of synchronous data transmission.
Please refer to fig. 1. Fig. 1 is a schematic diagram of an image playing system 100 according to an embodiment of the invention. The image playing system 100 includes an image data transmission device 110 and an image data receiving device 120.
In one embodiment, the video playback system 100 is, for example and without limitation, a television. The image data transmission device 110 is a circuit configured to provide image data, and the image data receiving device 120 is a panel configured to receive and play the image data.
With the increasing size of the panel, the image data transmission device 110 often transmits a plurality of image data (not shown) to the image data receiving device 120 for display through different circuits and corresponding channels. Wherein, different image data correspond to different panel display areas, and may be received by different circuits and corresponding channels inside the data receiving apparatus 120. Therefore, the image data transmission device 110 needs to have a synchronous data transmission mechanism, so that the image data receiving device 120 can receive and display multiple image data signals according to the correct time sequence to generate a correct image.
The following describes the synchronous data transmission mechanism of the image data transmission device 110 in more detail.
The image data transmission device 110 includes: the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B. The primary image data transmission circuit 130A is configured to generate and transmit a primary alignment signal ALA to the secondary image data transmission circuit 130B. The secondary image data transmission circuit 130B is configured to generate and transmit a secondary alignment signal ALB to the primary image data transmission circuit 130A. It should be understood that references herein to "primary" and "secondary" are intended only to distinguish between different circuits and signals transmitted thereby, and do not refer to differences in importance or quality of the circuits or signals themselves.
Please refer to fig. 2A. Fig. 2A shows a timing diagram of the transmission of the primary alignment signal ALA and the secondary alignment signal ALB between the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B according to an embodiment of the invention.
The primary alignment signal ALA and the secondary alignment signal ALB corresponding to the primary image data transmission circuit 130A are indicated by brackets 130A in fig. 2, and the primary alignment signal ALA and the secondary alignment signal ALB corresponding to the secondary image data transmission circuit 130B are indicated by brackets 130B in fig. 2.
The primary video data transmission circuit 130A is configured to generate and transmit a primary alignment signal ALA at a primary transmission time point PT and to receive a secondary alignment signal ALB at a primary reception time point PR. Therefore, the primary video data transmission circuit 130A can calculate the primary time difference PD between the primary transmission time PT and the primary reception time PR.
Similarly, the secondary video data transmission circuit 130B is configured to generate and transmit the secondary alignment signal ALB at the secondary transmission time point ST and to receive the primary alignment signal ALA at the secondary reception time point SR. Therefore, the secondary image data transmission circuit 130B can calculate the secondary time difference SD between the secondary transmission time point ST and the secondary reception time point SR.
It should be noted that, due to the delay of the signal transmission path between the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B, the delay time DL is provided between the primary transmission time PT of the primary alignment signal ALA transmitted by the primary image data transmission circuit 130A and the secondary reception time SR of the secondary image data transmission circuit 130B. In general, the delay time DL is determined by the distance of the signal transmission path. Similarly, the secondary alignment signal ALB has a delay DL between the secondary transmission time point ST transmitted by the secondary image data transmission circuit 130B and the primary reception time point PR received by the primary image data transmission circuit 130A.
In the present embodiment, as shown in fig. 2A, the time point (primary transmission time point PT) when the primary alignment signal ALA is generated by the primary image data transmission circuit 130A is earlier than the time point (secondary transmission time point ST) when the secondary alignment signal ALB is generated by the secondary image data transmission circuit 130B.
In such a case, the primary time difference PD between the primary transmission time point PT and the primary reception time point PR will be larger than the secondary time difference SD between the secondary transmission time point ST and the secondary reception time point SR.
Therefore, when the primary time difference PD is greater than the secondary time difference SD, it can be determined that the timing (hereinafter referred to as primary timing) of the primary image data transmission circuit 130A for generating the primary alignment signal ALA is earlier than the timing (hereinafter referred to as secondary timing) of the secondary image data transmission circuit 130B for generating the secondary alignment signal ALB. Therefore, the secondary timing corresponding to the secondary alignment signal ALB can be aligned with the primary timing corresponding to the primary alignment signal ALA by a timing adjustment amount adjusted forward. In one embodiment, the timing adjustment is the difference between the primary time difference PD and the delay time DL.
Please refer to fig. 2B. Fig. 2B shows a timing diagram of transmission of the primary alignment signal ALA and the secondary alignment signal ALB between the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B according to another embodiment of the invention.
The reference numerals in fig. 2B and the relationships between the signals and the circuits are the same as those in fig. 2A, and thus are not repeated. In the present embodiment, as shown in fig. 2B, the time point (primary transmission time point PT) when the primary alignment signal ALA is generated by the primary image data transmission circuit 130A is later than the time point (secondary transmission time point ST) when the secondary alignment signal ALB is generated by the secondary image data transmission circuit 130B.
If the signal transmission paths will generate the same delay time DL, the primary time difference PD between the primary transmission time point PT and the primary reception time point PR will be smaller than the secondary time difference SD between the secondary transmission time point ST and the secondary reception time point SR.
Therefore, when the primary time difference PD is smaller than the secondary time difference SD, it can be determined that the primary timing of the primary alignment signal ALA is later than the secondary timing of the secondary alignment signal ALB. Therefore, the secondary timing corresponding to the secondary alignment signal ALB can be aligned with the primary timing corresponding to the primary alignment signal ALA by a timing adjustment amount adjusted backward. In one embodiment, the timing adjustment is the difference between the secondary time difference SD and the delay time DL.
Please refer to fig. 2C. Fig. 2C shows a timing diagram of transmission of the primary alignment signal ALA and the secondary alignment signal ALB between the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B according to another embodiment of the invention.
The reference numerals in fig. 2C and the relationships between the signals and the circuits are the same as those in fig. 2A, and thus are not repeated. In this embodiment, as shown in fig. 2C, the time point (primary transmission time point PT) when the primary alignment signal ALA is generated by the primary image data transmission circuit 130A is equal to the time point (secondary transmission time point ST) when the secondary alignment signal ALB is generated by the secondary image data transmission circuit 130B.
If the signal transmission paths will produce the same delay time DL, the primary time difference PD between the primary transmission time point PT and the primary reception time point PR will be equal to the secondary time difference SD between the secondary transmission time point ST and the secondary reception time point SR in such a case.
Therefore, when the primary time difference PD is equal to the secondary time difference SD, it can be determined that the primary timing of the primary alignment signal ALA is equal to the secondary timing of the secondary alignment signal ALB. Therefore, the timing adjustment amount will be 0 without adjusting the secondary timing corresponding to the secondary alignment signal ALB.
In one embodiment, the comparison between the primary time difference PD and the secondary time difference SD is performed by the primary image data transmission circuit 130A.
In more detail, the primary image data transmission circuit 130A is configured to receive the secondary time difference SD from the secondary image data transmission circuit 130B, calculate the timing adjustment amount according to the primary time difference PD and the secondary time difference SD, and control the secondary image data transmission circuit 130B to adjust the secondary timing according to the timing adjustment amount.
In another embodiment, the comparison between the primary time difference PD and the secondary time difference SD is performed by the secondary image data transmission circuit 130B.
In more detail, the secondary image data transmission circuit 130B is configured to receive the primary time difference PD from the primary image data transmission circuit 130A, to calculate the timing adjustment amount according to the primary time difference PD and the secondary time difference SD, and to adjust the secondary timing according to the timing adjustment amount.
Next, the main image data transmission circuit 130A makes the main timing of the main alignment signal ALA as the main data transmission timing. The secondary image data transmission circuit 130B adjusts the secondary timing of the secondary alignment signal ALB by the timing adjustment amount to be used as the secondary data transmission timing.
Therefore, the primary image data transmission circuit 130A and the secondary image data transmission circuit 130B perform synchronous image data transmission with the image data receiving device 120 according to the primary data transmission timing and the secondary data transmission timing, respectively, so that the image data receiving device 120 plays images according to the two synchronous image data.
It should be noted that, in the above embodiment, a secondary image data transmission circuit is taken as an example for illustration. In other embodiments, the image data transmission device 110 may include a plurality of secondary image data transmission circuits, and each secondary image data transmission circuit may exchange alignment signals with the primary image data transmission circuit, and adjust the timing according to the relationship between the primary and secondary time differences after calculating the primary and secondary time differences according to the transmission time point and the reception time point. When the number of the main image data transmission circuit and the plurality of the secondary image data transmission circuits is N, N image data can be transmitted synchronously with the main image data transmission circuit. In the above embodiments, the internal circuit of the image data receiving apparatus 120 is not shown. In other embodiments, the image data receiving device 120 may include a plurality of image data receiving circuits respectively coupled to the plurality of image data transmitting circuits of the image data transmitting device 110 through independent channels, so as to perform synchronous transmission of the image data. In other words, the timing can be aligned between the plurality of image data receiving circuits of the image data receiving apparatus 120 by a similar method to perform synchronous image data receiving.
Therefore, the image data transmission device of the invention can determine the time sequence difference between the primary image data transmission circuit and the secondary image data transmission circuit through signal transmission and time difference calculation between the primary image data transmission circuit and the secondary image data transmission circuit, and further adjust the time sequence of the secondary image data transmission circuit to align the time sequence of the primary image data transmission circuit so as to achieve the aim of synchronous data transmission.
Please refer to fig. 3. Fig. 3 is a flowchart of an image data transmission method 300 with a synchronous data transmission mechanism according to an embodiment of the invention.
In addition to the above-mentioned devices, the present invention further discloses an image data transmission method 300 with a synchronous data transmission mechanism, which is applied to, for example, but not limited to, the image data transmission device 110 included in the image playing system 100 of fig. 1. One embodiment of the image data transmission method 300 is shown in fig. 3, and includes the following steps:
in step S310: the primary video data transmission circuit 130A is caused to generate and transmit the primary alignment signal ALA at the primary transmission time point PT and receive the secondary alignment signal ALB at the primary reception time point PR.
In step S320: the primary video data transmission circuit 130A is caused to calculate a primary time difference PD between the primary transmission time point PT and the primary reception time point PR.
In step S330: the main image data transmission circuit 130A is configured to make the main timing of the main alignment signal ALA as the main data transmission timing.
In step S340: the secondary video data transmission circuit 130B generates and transmits the secondary alignment signal ALB at the secondary transmission time point ST, and receives the primary alignment signal ALA at the secondary reception time point SR.
In step S350: the secondary image data transmission circuit 130B calculates a secondary time difference SD between the secondary transmission time point ST and the secondary reception time point SR.
In step S360: the secondary image data transmission circuit 130B adjusts the secondary timing of the secondary alignment signal ALB by a timing adjustment amount configured to adjust the primary time difference PD and the secondary time difference SD to be equal as the secondary data transmission timing.
In step S370: the main image data transmission circuit 130A and the secondary image data transmission circuit 130B are respectively synchronized with the image data receiving device 120 according to the main data transmission timing and the secondary data transmission timing, so that the image data receiving device 120 plays an image accordingly.
It should be noted that the above embodiments are only examples. In other embodiments, those of ordinary skill in the art will appreciate that modifications may be made without departing from the spirit of the invention.
In summary, the image playing system and the image data transmission device and method with the synchronous data transmission mechanism of the invention can judge the time sequence difference between the primary image data transmission circuit and the secondary image data transmission circuit through the signal transmission and the time difference between the primary image data transmission circuit and the secondary image data transmission circuit, thereby adjusting the time sequence of the secondary image data transmission circuit to align the time sequence of the primary image data transmission circuit so as to achieve the aim of synchronous data transmission.
Although the embodiments of the present invention have been described above, these embodiments are not intended to limit the present invention, and those skilled in the art may make modifications and adjustments to the technical features of the present invention according to the descriptions or the implicit descriptions of the present invention, but various changes are possible within the protection scope of the present invention, in other words, the protection scope of the present invention should be considered as the scope defined by the claims of the present application.
Claims (10)
1. An image data transmission device with a synchronous data transmission mechanism, wherein the image data transmission device comprises:
a main image data transmission circuit configured to:
generating and transmitting a primary alignment signal at a primary transmission time point and receiving a secondary alignment signal at a primary reception time point;
calculating a primary time difference between the primary transmission time points and the primary reception time points; and
causing a primary timing of the primary alignment signal to be a primary data transfer timing;
a secondary image data transmission circuit, coupled to the primary image data transmission circuit, configured to:
generating and transmitting the secondary alignment signal at a secondary transmission time point and receiving the primary alignment signal at a secondary reception time point;
calculating a secondary time difference between the secondary transmission time points and the secondary reception time points; and
adjusting a secondary timing of the secondary alignment signal by a timing adjustment amount to be a secondary data transmission timing, wherein the timing adjustment amount is configured to adjust the primary time difference and the secondary time difference to be equal;
the main image data transmission circuit and the secondary image data transmission circuit respectively perform synchronous image data transmission with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence so as to enable the image data receiving device to play images accordingly.
2. The image data transmission device according to claim 1, wherein the timing adjustment is to adjust the secondary timing forward as the secondary data transmission timing when the primary time difference is larger than the secondary time difference;
when the primary time difference is smaller than the secondary time difference, the timing adjustment is to adjust the secondary timing backward as the secondary data transfer timing; and
when the primary time difference is equal to the secondary time difference, the timing adjustment amount does not adjust the secondary timing to directly make the secondary timing the secondary data transfer timing.
3. The image data transmission device of claim 1, wherein the image data transmission device comprises a plurality of the secondary image data transmission circuits.
4. The image data transmission device of claim 1, wherein the primary image data transmission circuit is further configured to receive the secondary time difference from the secondary image data transmission circuit, to calculate the timing adjustment based on the primary time difference and the secondary time difference, and to control the secondary image data transmission circuit to adjust the secondary timing based on the timing adjustment.
5. The image data transmission device of claim 1, wherein the secondary image data transmission circuit is further configured to receive the primary time difference from the primary image data transmission circuit to calculate the timing adjustment based on the primary time difference and the secondary time difference to adjust the secondary timing based on the timing adjustment.
6. An image playing system, wherein the image playing system comprises:
an image data receiving device; and
an image data transmission device coupled to the image data receiving device, comprising:
a main image data transmission circuit configured to:
generating and transmitting a primary alignment signal at a primary transmission time point and receiving a secondary alignment signal at a primary reception time point;
calculating a primary time difference between the primary transmission time points and the primary reception time points; and
causing a primary timing of the primary alignment signal to be a primary data transfer timing;
a secondary image data transmission circuit, coupled to the primary image data transmission circuit, configured to:
generating and transmitting the secondary alignment signal at a secondary transmission time point and receiving the primary alignment signal at a secondary reception time point;
calculating a secondary time difference between the secondary transmission time points and the secondary reception time points; and
adjusting a secondary timing of the secondary alignment signal by a timing adjustment amount to be a secondary data transmission timing, wherein the timing adjustment amount is configured to adjust the primary time difference and the secondary time difference to be equal;
the main image data transmission circuit and the secondary image data transmission circuit respectively perform synchronous image data transmission with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence so as to enable the image data receiving device to play images accordingly.
7. An image data transmission method with a synchronous data transmission mechanism is applied to an image data transmission device, and is characterized in that the image data transmission method comprises the following steps:
the main image data transmission circuit generates and transmits a main alignment signal at a main transmission time point and receives a secondary alignment signal at a main receiving time point;
causing the primary image data transmission circuit to calculate a primary time difference between the primary transmission time point and the primary reception time point;
causing the primary image data transmission circuit to cause a primary timing of the primary alignment signal to be a primary data transmission timing;
causing a secondary image data transmission circuit to generate and transmit the secondary alignment signal at a secondary transmission time point and to receive the primary alignment signal at a secondary reception time point;
causing the secondary image data transmission circuit to calculate a secondary time difference between the secondary transmission time point and the secondary reception time point;
causing the secondary image data transmission circuit to adjust a secondary timing of the secondary alignment signal by a timing adjustment amount configured to adjust the primary time difference and the secondary time difference to be equal as a secondary data transmission timing; and
and enabling the main image data transmission circuit and the secondary image data transmission circuit to carry out synchronous image data transmission with the image data receiving device according to the main data transmission time sequence and the secondary data transmission time sequence respectively so as to enable the image data receiving device to play images accordingly.
8. The method of claim 7, wherein the timing adjustment is to adjust the secondary timing as the secondary data transmission timing when the primary time difference is greater than the secondary time difference;
when the primary time difference is smaller than the secondary time difference, the timing adjustment is to adjust the secondary timing backward as the secondary data transfer timing; and
when the primary time difference is equal to the secondary time difference, the timing adjustment amount does not adjust the secondary timing to directly make the secondary timing the secondary data transfer timing.
9. The image data transmission method according to claim 7, wherein the image data transmission method further comprises:
causing the primary image data transmission circuit to receive the secondary time difference from the secondary image data transmission circuit; and
the primary image data transmission circuit calculates the time sequence adjustment amount according to the primary time difference and the secondary time difference, and controls the secondary image data transmission circuit to adjust the secondary time sequence according to the time sequence adjustment amount.
10. The image data transmission method according to claim 7, wherein the image data transmission method further comprises:
causing the secondary image data transmission circuit to receive the primary time difference from the primary image data transmission circuit; and
the secondary image data transmission circuit calculates the time sequence adjustment amount according to the primary time difference and the secondary time difference so as to adjust the secondary time sequence according to the time sequence adjustment amount.
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