CN108024149B - Method for transmitting signal to SoC chip by TCON board through single connecting line, TCON board and television - Google Patents
Method for transmitting signal to SoC chip by TCON board through single connecting line, TCON board and television Download PDFInfo
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- CN108024149B CN108024149B CN201711368268.0A CN201711368268A CN108024149B CN 108024149 B CN108024149 B CN 108024149B CN 201711368268 A CN201711368268 A CN 201711368268A CN 108024149 B CN108024149 B CN 108024149B
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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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
- H04N17/045—Self-contained testing apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
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Abstract
The invention discloses a TCON board, a method for transmitting signals to an SoC chip by the TCON board and a television. The method for transmitting the signal to the SoC chip by the TCON board through the single connecting line comprises the following steps: analyzing the video signal transmitted by the SoC chip to obtain video data; if the video data are normal, transmitting a first level signal to the SoC chip; if the video data is abnormal, searching an abnormal code corresponding to the abnormal information of the video data from a preset table; generating an indication signal for indicating the abnormal code according to a protocol between the SoC chip and the chip; and transmitting an indication signal to the SoC chip. Compared with the prior art, the invention can realize the transmission of more effective information to the SoC chip by using the single connecting wire between the TCON board and the SoC chip on the basis of not changing the hardware structure, thereby ensuring the effective information interaction between the TCON board and the SoC chip and improving the reliability of the system.
Description
Technical Field
The invention relates to the field of televisions, in particular to a TCON board and a method for transmitting signals to an SoC chip by the TCON board, and further relates to a television.
Background
serdes is an acronym for SERializer/DESerializer. It is a mainstream time division multiplexing and point-to-point serial communication technology, i.e. a plurality of low-speed parallel signals are converted into high-speed serial signals at a sending end, and the high-speed serial signals are converted into low-speed parallel signals again at a receiving end through a transmission medium (an optical cable or a copper wire). The point-to-point serial communication technology fully utilizes the channel capacity of a transmission medium, reduces the number of required transmission channels and device pins, and improves the transmission speed of signals, thereby greatly reducing the communication cost.
At present, a high-speed serial serdes interface is mostly adopted between a common digital television SoC chip (system on chip) and a TCON board (logic board or screen driving board) on a display screen to complete transmission of video data, wherein transmission of these signals is unidirectional. The digital television SoC chip is used as a sending end, and the TCON board is used as a receiving end. As shown in fig. 1, a transmitting end transmits a video signal to a receiving end through a high-speed serdes line. In the current prior art, a receiving end feeds back a state of received video data to a transmitting end through a single connection line. Specifically, the receiving end transmits a high level or low level signal to the transmitting end through a single connection line, which is used to indicate that the received video data is normal or abnormal, and then the transmitting end responds according to the received level signal. For example, when the sending end receives a high level signal, if the video data received by the receiving end is normal, the video data is continuously transmitted to the receiving end; when the sending end receives the low level signal, the video data received by the receiving end is considered to be abnormal, and the video data transmission to the receiving end is stopped. However, in the practical application process, the receiving end is often abnormal, and the low level signal (or the high level signal) transmitted through the single connection line cannot transmit the specific abnormal information of the video data to the transmitting end, which may cause that the transmitting end may only make a single response, for example, stop transmitting the video data to the receiving end, and cannot make a corresponding response according to the specific abnormal information of the video data.
Disclosure of Invention
The invention provides a TCON board, a method for transmitting signals to an SoC chip and a television thereof, and aims to overcome the defect that in the prior art, a TCON board can only feed back the normal or abnormal state of video data to the SoC chip through a single connecting wire and cannot feed back specific abnormal information of the video data, so that information interaction between the SoC chip and the TCON board is simplified.
The invention solves the technical problems through the following technical scheme:
the first aspect of the present invention provides a method for transmitting a signal to an SoC chip through a single connection line by a TCON board, comprising the steps of:
analyzing the video signal transmitted by the SoC chip to obtain video data;
if the video data are normal, transmitting a first level signal to the SoC chip;
if the video data is abnormal, executing the following steps:
searching an abnormal code corresponding to the abnormal information of the video data from a preset table;
generating an indication signal for indicating the abnormal code according to a protocol with the SoC chip, wherein the indication signal comprises a pulse signal;
and transmitting the indication signal to the SoC chip.
Optionally, the indication signal is further used for carrying a data packet header recognizable by the SoC chip.
Optionally, the abnormal information is timing information (information reflecting the number of pixels of the video signal) error, bit decoding error, critical codeword abnormality, PLL (phase locked loop) loss of lock or data loss.
A second aspect of the present invention provides a method for a TCON board to transmit a signal to an SoC chip through a single connection line, including the steps of:
analyzing the video signal transmitted by the SoC chip to obtain video data;
if the error rate of the video data is zero, transmitting a first level signal to the SoC chip;
if the error rate of the video data is larger than zero and smaller than a preset error rate, executing the following steps:
searching an abnormal code corresponding to the abnormal information of the video data from a preset table;
generating an indication signal for indicating the abnormal code according to a protocol with the SoC chip, wherein the indication signal comprises a pulse signal;
and transmitting the indication signal to the SoC chip.
Optionally, after the step of analyzing the video signal transmitted by the SoC chip to obtain the video data, the method further includes:
and if the error rate of the video data is greater than or equal to the preset error rate, transmitting a second level signal to the SoC chip.
Optionally, the indication signal is further used for carrying a data packet header recognizable by the SoC chip.
Optionally, the abnormal information is timing information error, bit decoding error, critical code word abnormality or PLL loss-of-lock.
A third aspect of the present invention provides a TCON board comprising:
a memory for storing a computer program;
and a processor for executing the computer program to implement the method as described above.
A fourth aspect of the present invention provides a television set, including an SoC chip and the TCON board as described above.
Optionally, the SoC chip is configured to transmit a video signal to the TCON board in a unidirectional manner through a serdes line.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: compared with the prior art, the invention can realize the transmission of more effective information to the SoC chip by using a single connecting line between the TCON board and the SoC chip on the basis of not changing a hardware structure, and particularly, when the video data received by the TCON board is abnormal, an abnormal code corresponding to the abnormal information of the video data is searched from a preset table, and an indicating signal for indicating the abnormal code is generated; because the indication signal comprises a pulse signal, different indication signals can be generated according to a protocol between the TCON board and the SoC chip, and further more effective information can be transmitted to the SoC chip by the TCON board, so that the SoC chip can make corresponding response according to specific abnormal information fed back by the TCON board, effective information interaction between the TCON board and the SoC chip is ensured, and the reliability of the system is improved.
Drawings
Fig. 1 is a block diagram of a connection structure between a transmitting end and a receiving end in the prior art.
Fig. 2 is a flowchart of a method for transmitting a signal to an SoC chip through a single connection line by a TCON board according to an embodiment of the present invention.
Fig. 3 is an indication signal for indicating an exception code "3" according to an embodiment of the present invention.
Fig. 4 is another indication signal for indicating an exception code "3" according to an embodiment of the present invention.
Fig. 5 is an indication signal for indicating an exception code "101" according to an embodiment of the present invention.
Fig. 6 is another indication signal for indicating an exception code "101" according to an embodiment of the present invention.
Fig. 7 is a signal for carrying a packet header "10101100" and an indication of an exception code "101" according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The embodiment is applied to a television comprising an SoC chip and a TCON board, and specifically, the SoC chip transmits a digitally processed video signal to the TCON board, and the video signal is processed by the TCON board and then converted into a signal capable of driving a display screen to display an image.
In the prior art, as shown in fig. 1, a SoC chip (sending end) transmits a video signal to a TCON board (receiving end) through a serdes line, and if the serdes line is disturbed, the video signal received by the TCON board is inconsistent with the video signal actually transmitted by the SoC chip. Currently, the TCON board feeds back the state of the received video data to the SoC chip through a single connection line, which includes two states, i.e., normal and abnormal, for example, a high-level signal is fed back to indicate normal, and a low-level signal is fed back to indicate abnormal.
The embodiment provides a method for transmitting a signal to an SoC chip by a TCON board through a single connection line, as shown in fig. 2, including the following steps:
step 201, analyzing the video signal transmitted by the SoC chip to obtain video data. In this embodiment, the TCON board receives the video signal transmitted by the SoC chip and analyzes the video signal to obtain video data. The format of the video signal may be a V-by-One signal (a digital interface standard developed specifically for image transmission), or may be an LVDS signal, and the specific format is not limited.
And step 203, transmitting the first level signal to the SoC chip. The first level signal may be a high level signal or a low level signal, and is not limited specifically.
And step 204, searching an abnormal code corresponding to the abnormal information of the video data from a preset table. In this embodiment, the preset table stores a one-to-one correspondence relationship between the abnormal information of the video data and the abnormal code. The abnormal information of the video data may be timing information error, bit decoding error (for example, 8-bit to 10-bit decoding), key codeword (Kcode) abnormality, PLL loss of lock or data loss, etc. For example, the exception code corresponding to the timing information error is "101", and the exception code corresponding to the bit decoding error is "011".
In an optional implementation manner, four kinds of abnormal information, namely timing information error, bit decoding error, key codeword abnormality and PLL lock loss, are common abnormal information, and if the SoC chip receives any one of the abnormal information, only an intermediate operation after the SoC chip is connected to the TCON board needs to be performed. And if the SoC chip receives the abnormal information, the SoC chip needs to be reconnected with the TCON board.
And step 205, generating an indication signal for indicating the abnormal code according to a protocol between the abnormal code and the SoC chip. Wherein the indication signal comprises a pulse signal. Specifically, the pulse signal may be a square wave, a triangular wave, or a sine wave.
In this embodiment, an agreement is required between the TCON board and the SoC chip for the exception code represented by the indication signal and the exception information represented by the exception code. In addition, it should be noted that the indication signal generated in step 205 is not related to the first level signal in step 203 in this embodiment.
In an alternative embodiment, the number of pulse signals is used to characterize the abnormal code according to a protocol between the TCON board and the SoC chip. For example, the abnormal code corresponding to the timing information error is "3", then the indication signal for indicating the abnormal code "3" may include 3 pulse signals as shown in fig. 3 or fig. 4, which are not limited by whether the first level signal is a high level signal or a low level signal. The frequency of the pulse signal can be set according to specific needs, as long as the pulse signal can be counted inside the SoC chip, for example, the frequency can be 40 KHz.
In an alternative embodiment, the exception code is characterized by both a pulse signal and a fixed level signal according to a protocol between the TCON board and the SoC chip. For example, if the abnormal code corresponding to the timing information error is "101", the indication signal for indicating the abnormal code "101" may be as shown in fig. 5, 5 pulse signals represent "0", and a high level signal having the same period as that of the 5 pulse signals represents "1", where the specific several pulse signals represent "0" is determined by the protocol between the TCON board and the SoC chip; the indication signal for indicating the abnormal code "101" may be also as shown in fig. 6, 5 pulse signals represent "1", and a low level signal having the same period as that of the 5 pulse signals represents "0", and similarly, the specific several pulse signals represent "1" is determined by the protocol between the TCON board and the SoC chip.
In an optional implementation manner, according to a protocol between the TCON board and the SoC chip, the indication signal is further used for carrying a data packet header recognizable by the SoC chip. For example, it may be agreed between the TCON board and the SoC chip that "10101100" is used as a data header at the beginning of each feedback signal, and the following data is payload data for indicating an exception code "101", and a specific indication signal may be as shown in fig. 7.
And step 206, transmitting the indication signal to the SoC chip.
Compared with the prior art, the embodiment can realize the transmission of more effective information to the SoC chip by using a single connecting line between the TCON board and the SoC chip on the basis of not changing a hardware structure, and specifically, when video data received by the TCON board is abnormal, an abnormal code corresponding to the abnormal information of the video data is searched from a preset table, and an indication signal for indicating the abnormal code is generated; because the indication signal comprises a pulse signal, different indication signals can be generated according to a protocol between the TCON board and the SoC chip, and further more effective information can be transmitted to the SoC chip by the TCON board, so that the SoC chip can make corresponding response according to specific abnormal information fed back by the TCON board, effective information interaction between the TCON board and the SoC chip is ensured, and the reliability of the system is improved.
In an optional implementation manner, when the SoC chip receives the indication signal transmitted by the TCON board, the indication signal is analyzed according to a protocol between the SoC chip and the TCON board to obtain an abnormal code, specific abnormal information of the video data is obtained according to the abnormal code, and finally a corresponding response is made. The SoC chip also stores the same preset table, and the abnormal information of the video data corresponding to the abnormal code can be found from the preset table. For example, when the abnormal information of the video data is timing information error, the SoC chip performs an operation of resetting and transmitting the PLL; when the abnormal information of the video data is a bit decoding error, the SoC chip executes the operation of resending the CDR pattern; when the abnormal information of the video data is that the keyword is abnormal, the SoC chip executes the operation of resending the align pattern; when the abnormal information of the video data is PLL lock losing, the SoC chip executes the operation of reconfiguring TX data; when the abnormal information of the video data is data loss, the SoC chip executes the operation of reconnection with the TCON board.
The embodiment also provides a method for transmitting a signal to an SoC chip by the TCON board through a single connection line, which includes the following steps:
step 301, analyzing the video signal transmitted by the SoC chip to obtain video data.
Step 302, if the error rate of the video data is zero, executing step 303; and if the error rate of the video data is larger than zero and smaller than the preset error rate, executing steps 304-306. The preset error rate may be set according to a specific abnormal condition of the video data, and may be set to 80%, for example.
And step 303, transmitting the first level signal to the SoC chip.
And step 304, searching an abnormal code corresponding to the abnormal information of the video data from a preset table. Wherein, the abnormal information is timing information error, bit decoding error, key code word abnormality or PLL loss-of-lock.
And 305, generating an indication signal for indicating the abnormal code according to a protocol between the abnormal code and the SoC chip. Wherein the indication signal comprises a pulse signal.
In an optional implementation manner, the indication signal is further used for carrying a data packet header recognizable by the SoC chip.
And step 306, transmitting the indication signal to the SoC chip.
In an optional embodiment, step 302 further includes: if the error rate of the video data is greater than or equal to the predetermined error rate, step 307 is executed.
And 307, transmitting the second level signal to the SoC chip. In this embodiment, the first level signal in step 303 is opposite to the second level signal in step 307, for example, if the first level signal is a high level signal, the second level signal is a low level signal; if the first level signal is a low level signal, the second level signal is a high level signal.
In this embodiment, if the error rate of the video data is greater than the preset error rate, it indicates that the video data analyzed by the TCON board has a serious error, and at this time, the second level signal opposite to the first level signal is directly transmitted to the SoC chip, and steps of searching for an abnormal code, generating an indication signal, and the like do not need to be performed, so that the efficiency is improved.
The present embodiment divides the abnormal degree of the video data, specifically: if the error rate of the video data is zero, the video data is normal; if the error rate of the video data is larger than zero and smaller than the preset error rate, the video data is normal and abnormal, namely the error rate is low; if the error rate of the video data is greater than the preset error rate, the video data is seriously abnormal, namely the error rate is high. The TCON board transmits different signals to the SoC chip according to different abnormal degrees of the video data, specifically, if the video data is normal, a first level signal is transmitted, if the video data is normal, an indication signal including a pulse signal is transmitted, and if the video data is seriously abnormal, a second level signal is transmitted.
It should be noted that, in order to avoid the SoC chip from confusing the indication signal with the second level signal, in this embodiment, the indication signal needs to be generated with reference to the first level signal in step 303 or the second level signal in step 307 according to the protocol between the TCON and the SoC chip.
In an alternative embodiment, the number of pulse signals is used to characterize the abnormal code according to a protocol between the TCON board and the SoC chip. For example, the abnormal code corresponding to the timing information error is "3", then, when the first level signal is a high level signal, the indication signal for indicating the abnormal code "3" may be as shown in fig. 3; when the first level signal is a low level signal, an indication signal for indicating an abnormal code "3" may be as shown in fig. 4.
In an alternative embodiment, the exception code is characterized by both a pulse signal and a fixed level signal according to a protocol between the TCON board and the SoC chip. For example, if the abnormal code corresponding to the timing information error is "101", when the first level signal is a high level signal, the indication signal for indicating the abnormal code "101" may be as shown in fig. 5, 5 pulse signals represent "0", and a high level signal having the same period as that of the 5 pulse signals represents "1", where the specific several pulse signals represent "0" is determined by the protocol between the TCON board and the SoC chip; when the first level signal is a low level signal, the indication signal for indicating the abnormal code "101" may be as shown in fig. 6, 5 pulse signals represent "1", and a low level signal having the same period as that of the 5 pulse signals represents "0", and likewise, the specific several pulse signals represent "1" is determined by a protocol between the TCON board and the SoC chip.
The present embodiment also provides a TCON board, including:
a memory for storing a computer program;
and a processor for executing the computer program to implement the method according to any of the above embodiments.
The present embodiment further provides a television set, which includes an SoC chip and the TCON board according to any one of the above embodiments.
In an alternative embodiment, the SoC chip is configured to transmit the video signal to the TCON board in a single direction through the serdes line.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A method for transmitting signals to an SoC chip by a TCON board through a single connecting line is characterized by comprising the following steps:
analyzing the video signal transmitted by the SoC chip to obtain video data;
if the video data are normal, transmitting a first level signal to the SoC chip;
if the video data is abnormal, executing the following steps:
searching an abnormal code corresponding to the abnormal information of the video data from a preset table;
generating an indication signal for indicating the abnormal code according to a protocol with the SoC chip, wherein the indication signal comprises a pulse signal;
and transmitting the indication signal to the SoC chip.
2. The method of claim 1, wherein the indication signal is further to carry a data packet header recognizable by the SoC chip.
3. The method of claim 1 or 2, wherein the abnormal information is timing information error, bit decoding error, critical code word abnormality, PLL loss of lock, or data loss.
4. A method for transmitting signals to an SoC chip by a TCON board through a single connecting line is characterized by comprising the following steps:
analyzing the video signal transmitted by the SoC chip to obtain video data;
if the error rate of the video data is zero, transmitting a first level signal to the SoC chip;
if the error rate of the video data is larger than zero and smaller than a preset error rate, executing the following steps:
searching an abnormal code corresponding to the abnormal information of the video data from a preset table;
generating an indication signal for indicating the abnormal code according to a protocol with the SoC chip, wherein the indication signal comprises a pulse signal;
and transmitting the indication signal to the SoC chip.
5. The method of claim 4, wherein after the step of parsing the video signal transmitted by the SoC chip to obtain the video data, the method further comprises:
and if the error rate of the video data is greater than or equal to the preset error rate, transmitting a second level signal to the SoC chip.
6. The method of claim 4, wherein the indication signal is further to carry a data packet header recognizable by the SoC chip.
7. The method of any of claims 4-6, wherein the exception information is a timing information error, a bit decoding error, a key codeword exception, or a PLL loss of lock.
8. A TCON board, comprising:
a memory for storing a computer program;
and a processor for executing the computer program to implement the method of any one of claims 1-7.
9. A television set comprising an SoC chip and the TCON board of claim 8.
10. The television set according to claim 9, wherein the SoC chip is configured to transmit video signals unidirectionally to the TCON board over serdes lines.
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