CN112383732B - Resolution adaptive signal transmission system and method - Google Patents
Resolution adaptive signal transmission system and method Download PDFInfo
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- CN112383732B CN112383732B CN202011451282.9A CN202011451282A CN112383732B CN 112383732 B CN112383732 B CN 112383732B CN 202011451282 A CN202011451282 A CN 202011451282A CN 112383732 B CN112383732 B CN 112383732B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Controls And Circuits For Display Device (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a resolution self-adaptive signal transmission system and a resolution self-adaptive signal transmission method, wherein the signal transmission system comprises a control module and a transmission module, and the control module comprises a data acquisition unit and a switching unit; the data acquisition unit is used for acquiring resolution data of external display equipment; the switching unit is used for selecting a signal transmission channel corresponding to the communication according to the resolution data; the transmission module is used for transmitting a display signal to the display equipment for display through the communicated signal output channel. The signal transmission system can automatically switch and communicate different transmission channels according to the resolution of external equipment so as to realize the transmission of signals with the same resolution. Preferably, by setting two groups of transmission channels, when the external device is of low resolution, one transmission channel is used for data transmission, and when the external device is of high resolution, two transmission channels are used for data transmission.
Description
Technical Field
The invention belongs to the field of signal processing, and particularly relates to a resolution self-adaptive signal transmission system and method.
Background
The MIPI interface is a display output interface on an android mobile device, and most of the commonly used interfaces of displays or televisions in the current home are HDMI interface types, so that a MIPI-to-HDMI device is needed when MIPI data on the android device needs to be displayed on the display of the HDMI interface.
The existing MIPI-to-HDMI method only can realize output with a single resolution when converting a group of MIPI signals into HDMI signals by using a video signal conversion chip, that is, if the resolution of an external display is 1080P, it can only realize data transmission with the resolution of 1080P to an external display device with the resolution of 1080P, and when the method is applied to an external display device with the resolution higher than 1080P, such as 4K resolution, the signal transmission device cannot be adapted.
Disclosure of Invention
The invention aims to overcome the defect that a signal transmission device in the prior art cannot be adapted according to the resolution of external display equipment, and provides a resolution self-adaptive signal transmission system and a resolution self-adaptive signal transmission method.
The invention solves the technical problems by the following technical scheme:
the signal transmission system with the self-adaptive resolution comprises a control module and a transmission module, wherein the control module comprises a data acquisition unit and a switching unit;
the data acquisition unit is used for acquiring resolution data of external display equipment;
the switching unit is used for selecting a signal transmission channel corresponding to the communication according to the resolution data;
the transmission module is used for transmitting a display signal to the display equipment for display through the communicated signal output channel.
Preferably, the signal transmission channel comprises a main transmission channel and an auxiliary transmission channel, and the control module further comprises a data detection unit;
the data detection unit is used for detecting whether the resolution data is larger than a preset threshold value, if yes, the switching unit is called to communicate the main transmission channel and the auxiliary transmission channel, and if no, the switching unit is called to communicate the main transmission channel.
Preferably, the signal transmission system further comprises a signal conversion chip, wherein the signal conversion chip comprises a DET pin;
the signal conversion chip is used for detecting whether the display equipment is accessed, if yes, the DET pin is switched from a preset low level to a high level;
the signal conversion chip is also used for acquiring and storing resolution data of the display device after the DET pin is switched to a high level;
the data acquisition unit is used for acquiring the resolution data stored by the signal conversion chip.
Preferably, the signal conversion chip further comprises an INT pin, and the control module further comprises a signal detection unit;
the signal conversion chip is used for switching the INT pin from a preset low level to a high level after the resolution data are stored;
the signal detection unit is used for calling the data acquisition unit to acquire the resolution data stored by the signal conversion chip after detecting that the INT pin is switched to a high level.
Preferably, the signal conversion chip further comprises a first I2C interface and a second I2C interface;
the first I2C interface is connected with the display device, and the second I2C interface is connected with the control module;
the signal conversion chip is used for acquiring resolution data of the display equipment through the first I2C interface;
the data acquisition unit is used for acquiring the resolution data stored by the signal conversion chip through the second I2C interface;
and/or, the signal transmission system further comprises an HDMI interface;
the HDMI interface is respectively connected with the display device and the signal conversion chip;
the transmission module is used for transmitting the display signal to the signal conversion chip;
the signal conversion chip is also used for converting the display signal into an HDMI format and transmitting the converted display signal to the display device through the HDMI interface.
A method of resolution-adaptive signal transmission, the method comprising:
acquiring resolution data of external display equipment;
selecting a signal transmission channel corresponding to communication according to the resolution data;
and transmitting a display signal to the display equipment for display through the communicated signal output channel.
Preferably, the signal transmission channel includes a main transmission channel and an auxiliary transmission channel, and the step of selecting to connect the corresponding signal transmission channel according to the resolution data specifically includes:
and detecting whether the resolution data is larger than a preset threshold value, if so, communicating the main transmission channel with the auxiliary transmission channel, and if not, communicating the main transmission channel.
Preferably, the signal transmission method is implemented by a signal conversion chip, the signal conversion chip includes a DET pin, and the step of obtaining resolution data of the external display device specifically includes:
detecting whether the display equipment is accessed, if so, switching the DET pin from a preset low level to a high level;
the signal conversion chip acquires and stores resolution data of the display equipment;
and acquiring the resolution data stored by the signal conversion chip.
Preferably, the signal conversion chip further includes an INT pin, and after the step of obtaining and storing the resolution data, the signal transmission method further includes:
switching the INT pin from a preset low level to a high level;
the step of obtaining the resolution data stored in the signal conversion chip specifically includes:
and after the INT pin is detected to be switched to the high level, acquiring the resolution data stored by the signal conversion chip.
Preferably, the signal conversion chip further comprises a first I2C interface and a second I2C interface;
the step of the signal conversion chip obtaining and storing the resolution data of the display device specifically comprises the following steps:
the signal conversion chip acquires and stores resolution data of the display equipment through the first I2C interface;
the step of obtaining the resolution data stored in the signal conversion chip specifically includes:
acquiring and storing the resolution data stored by the signal conversion chip through the second I2C interface;
and/or, the step of transmitting a display signal to the display device for display through the connected signal output channel specifically includes:
transmitting the display signal to the signal conversion chip;
the signal conversion chip converts the display signal into an HDMI format;
and transmitting the converted display signal to the display equipment.
The invention has the positive progress effects that: the signal transmission system can automatically switch and communicate different transmission channels according to the resolution of external equipment so as to realize the transmission of signals with the same resolution. Preferably, by setting two groups of transmission channels, when the external device is of low resolution, one transmission channel is used for data transmission, and when the external device is of high resolution, two transmission channels are used for data transmission.
Drawings
Fig. 1 is a block diagram of a resolution adaptive signal transmission system according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of a resolution adaptive signal transmission system according to embodiment 2 of the present invention.
Fig. 3 is a flowchart of a method for resolution adaptive signaling according to embodiment 3 of the present invention.
Fig. 4 is a flowchart of step 20 in the resolution adaptive signal transmission method of embodiment 3 of the present invention.
Fig. 5 is a flowchart of step 10 in the resolution adaptive signal transmission method of embodiment 4 of the present invention.
Fig. 6 is a flowchart of another implementation of step 10 in the resolution adaptive signaling method of embodiment 4 of the present invention.
Fig. 7 is a flowchart of step 30 in the resolution adaptive signal transmission method of embodiment 4 of the present invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
A resolution-adaptive signal transmission system, as shown in fig. 1, the signal transmission system includes a control module 1 and a transmission module 2, the control module 1 includes a data acquisition unit 11 and a switching unit 12;
the data acquisition unit 11 is used for acquiring resolution data of the external display device 3;
the switching unit 12 is configured to select a signal transmission channel corresponding to the communication according to the resolution data;
the transmission module 2 is configured to transmit a display signal to the display device 3 for display through the connected signal output channel.
It should be noted that, the resolution of the display signal in this embodiment is consistent with the resolution of the external display device, and after the resolution of the external display device is detected and obtained, the signal resolution may be adaptively adjusted by the device that provides the signal.
Wherein the signal transmission channel comprises a main transmission channel 21 and an auxiliary transmission channel 22, and the control module 1 further comprises a data detection unit 13;
the data detection unit 13 is configured to detect whether the resolution data is greater than a preset threshold, if yes, call the switching unit 12 to communicate the main transmission channel 21 with the auxiliary transmission channel 22, and if no, call the switching unit 12 to communicate the main transmission channel 21.
In this embodiment, different transmission channels can be automatically switched and connected according to the resolution of the external device so as to realize the transmission of signals with the same resolution. Preferably, by setting two groups of transmission channels, when the external device is of low resolution, one transmission channel is used for data transmission, and when the external device is of high resolution, two transmission channels are used for data transmission.
Example 2
This embodiment is a further improvement on the basis of embodiment 1, as shown in fig. 2, the signal transmission system further includes a signal conversion chip 4, and the signal conversion chip 4 includes a DET pin;
the signal conversion chip 4 is configured to detect whether the display device 3 is connected, and if yes, switch the DET pin from a preset low level to a high level;
the signal conversion chip 4 is further configured to obtain and store resolution data of the display device 3 after the DET pin is switched to a high level;
the data acquisition unit 11 is configured to acquire the resolution data stored in the signal conversion chip 4.
In this embodiment, the signal conversion chip 4 further includes an INT pin, and the control module 1 further includes a signal detection unit 14;
the signal conversion chip 4 is used for switching the INT pin from a preset low level to a high level after the resolution data are stored;
the signal detection unit 14 is configured to invoke the data acquisition unit 11 to acquire the resolution data stored in the signal conversion chip 4 after detecting that the INT pin is switched to a high level.
The signal conversion chip 4 further comprises a first I2C interface and a second I2C interface;
the first I2C interface is connected with the display device 3, and the second I2C interface is connected with the control module 1;
the signal conversion chip 4 is used for acquiring resolution data of the display device 3 through the first I2C interface;
the data acquisition unit 11 is configured to acquire the resolution data stored in the signal conversion chip 4 through the second I2C interface;
in this embodiment, the signal transmission system further includes an HDMI interface 5;
the HDMI 5 is respectively connected with the display device 3 and the signal conversion chip 4;
the transmission module 2 is used for transmitting the display signal to the signal conversion chip 4;
the signal conversion chip 4 is further configured to convert the display signal into an HDMI format, and transmit the converted display signal to the display device 3 through the HDMI interface 5.
In this embodiment, when an external display is plugged into the HDMI interface, the DET pin becomes high level, the signal conversion chip detects that the DET pin becomes high level, and then reads resolution data of the externally accessed display through the first I2C interface, then the INT pin is set to high level, the control module detects that the INT pin is high level, and then reads resolution information stored in the signal conversion chip through the second I2C interface, if the resolution of the external display is greater than the set threshold and is high, for example, 4K, the switching unit of the control module communicates with the main signal transmission channel and the auxiliary signal transmission channel through the CTRL pin, then the control module pulls down the RST pin to reset the signal conversion chip, and thus the signal conversion chip can output a 4K resolution signal to adapt to the external 4K display; if the resolution of the external display is low resolution, such as 1080P, the switching unit of the control module is communicated with the main transmission channel through CTRL, the auxiliary transmission channel is closed, then the control module pulls down the RST pin reset signal conversion chip, and the 1080P resolution signal can be output by the signal conversion chip so as to be suitable for the external 1080P display.
Example 3
A resolution adaptive signal transmission method, as shown in fig. 3, the signal transmission method comprising:
step 10, obtaining resolution data of external display equipment;
step 20, selecting a signal transmission channel corresponding to communication according to the resolution data;
and step 30, transmitting a display signal to display equipment for display through the communicated signal output channel.
It should be noted that, the resolution of the display signal in this embodiment is consistent with the resolution of the external display device, and after the resolution of the external display device is detected and obtained, the signal resolution may be adaptively adjusted by the device that provides the signal.
Specifically, referring to fig. 4, the signal transmission channel includes a main transmission channel and an auxiliary transmission channel, and step 20 specifically includes:
step 201, detecting whether the resolution data is greater than a preset threshold, if yes, executing step 202, and if not, executing step 203;
step 202, communicating a main transmission channel and an auxiliary transmission channel;
step 203, the main transmission channel is communicated.
In this embodiment, different transmission channels can be automatically switched and connected according to the resolution of the external device so as to realize the transmission of signals with the same resolution. Preferably, by setting two groups of transmission channels, when the external device is of low resolution, one transmission channel is used for data transmission, and when the external device is of high resolution, two transmission channels are used for data transmission.
Example 4
The present embodiment is a further improvement on the basis of embodiment 3, where the signal transmission method is implemented by using a signal conversion chip, and the signal conversion chip includes a DET pin, as shown in fig. 5, and step 10 specifically includes:
step 101, detecting whether the display equipment is accessed, if yes, executing step 102;
step 102, switching the DET pin from a preset low level to a high level;
step 103, the signal conversion chip acquires and stores resolution data of the display equipment;
step 104, obtaining resolution data stored by the signal conversion chip.
In this embodiment, the signal conversion chip further includes an INT pin, fig. 6 shows another implementation manner of step 10, and after step 103, the signal transmission method further includes:
step 105, switching the INT pin from a preset low level to a high level;
step 104 further specifically includes:
step 1041, obtaining resolution data stored by the signal conversion chip after detecting that the INT pin is switched to a high level.
In this embodiment, the signal conversion chip further includes a first I2C interface and a second I2C interface, and step 103 specifically includes: the signal conversion chip acquires and stores resolution data of the display equipment through a first I2C interface;
step 104 specifically includes: the resolution data stored by the signal conversion chip are acquired through a second I2C interface and stored;
in this embodiment, referring to fig. 7, step 30 specifically includes:
step 301, transmitting a display signal to a signal conversion chip;
step 302, the signal conversion chip converts the display signal into an HDMI format;
step 303, transmitting the converted display signal to a display device.
In this embodiment, when an external display is inserted into the HDMI interface, the DET pin becomes high level, after detecting that the DET pin becomes high level, the signal conversion chip reads resolution data of the externally accessed display through the first I2C interface, then the INT pin is set to high level, after detecting that the INT pin is high level, the control module reads resolution information stored in the signal conversion chip through the second I2C interface, if the resolution of the external display is greater than a set threshold, the resolution is high resolution, for example, 4K, the switching unit of the control module is connected with the main signal transmission channel and the auxiliary signal transmission channel, so that a 4K resolution signal can be output to adapt to the external 4K display; if the resolution of the external display is low resolution such as 1080P, the switching unit of the control module is communicated with the main transmission channel, and the auxiliary transmission channel is closed, so that a 1080P resolution signal can be output to adapt to the external 1080P display.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and 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 principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (8)
1. The resolution adaptive signal transmission system is characterized by comprising a control module and a transmission module, wherein the control module comprises a data acquisition unit and a switching unit;
the data acquisition unit is used for acquiring resolution data of external display equipment;
the switching unit is used for selecting a signal transmission channel corresponding to the communication according to the resolution data;
the transmission module is used for transmitting a display signal to the display equipment for display through the communicated signal output channel;
the signal transmission system also comprises a signal conversion chip, wherein the signal conversion chip comprises a DET pin;
the signal conversion chip is used for detecting whether the display equipment is accessed, if yes, the DET pin is switched from a preset low level to a high level;
the signal conversion chip is also used for acquiring and storing resolution data of the display device after the DET pin is switched to a high level;
the data acquisition unit is used for acquiring the resolution data stored by the signal conversion chip;
the signal conversion chip further comprises an INT pin, and the control module further comprises a signal detection unit;
the signal conversion chip is used for switching the INT pin from a preset low level to a high level after the resolution data are stored.
2. The resolution-adaptive signal transmission system according to claim 1, wherein the signal transmission channel includes a main transmission channel and a sub transmission channel, and the control module further includes a data detection unit;
the data detection unit is used for detecting whether the resolution data is larger than a preset threshold value, if yes, the switching unit is called to communicate the main transmission channel and the auxiliary transmission channel, and if no, the switching unit is called to communicate the main transmission channel.
3. The resolution-adaptive signal transmission system according to claim 1, wherein the control module further includes a signal detection unit;
the signal detection unit is used for calling the data acquisition unit to acquire the resolution data stored by the signal conversion chip after detecting that the INT pin is switched to a high level.
4. The resolution-adaptive signal transmission system according to claim 1, wherein the signal conversion chip further includes a first I2C interface and a second I2C interface;
the first I2C interface is connected with the display device, and the second I2C interface is connected with the control module;
the signal conversion chip is used for acquiring resolution data of the display equipment through the first I2C interface;
the data acquisition unit is used for acquiring the resolution data stored by the signal conversion chip through the second I2C interface;
and/or, the signal transmission system further comprises an HDMI interface;
the HDMI interface is respectively connected with the display device and the signal conversion chip;
the transmission module is used for transmitting the display signal to the signal conversion chip;
the signal conversion chip is also used for converting the display signal into an HDMI format and transmitting the converted display signal to the display device through the HDMI interface.
5. A method of resolution-adaptive signal transmission, the method comprising:
acquiring resolution data of external display equipment;
selecting a signal transmission channel corresponding to communication according to the resolution data;
transmitting a display signal to the display equipment for display through the communicated signal output channel;
the signal transmission method is realized by a signal conversion chip, the signal conversion chip comprises a DET pin, and the step of acquiring resolution data of external display equipment comprises the following steps:
detecting whether the display equipment is accessed, if so, switching the DET pin from a preset low level to a high level;
the signal conversion chip acquires and stores resolution data of the display equipment;
acquiring the resolution data stored by the signal conversion chip;
the signal conversion chip further comprises an INT pin, and after the step of obtaining and storing the resolution data by the signal conversion chip, the signal transmission method further comprises the following steps:
and switching the INT pin from a preset low level to a high level.
6. The method for adaptive signal transmission according to claim 5, wherein the signal transmission channels include a main transmission channel and an auxiliary transmission channel, and the step of selecting to connect the corresponding signal transmission channels according to the resolution data specifically includes:
and detecting whether the resolution data is larger than a preset threshold value, if so, communicating the main transmission channel with the auxiliary transmission channel, and if not, communicating the main transmission channel.
7. The method for resolution-adaptive signal transmission according to claim 5, wherein,
the step of obtaining the resolution data stored in the signal conversion chip specifically includes:
and after the INT pin is detected to be switched to the high level, acquiring the resolution data stored by the signal conversion chip.
8. The resolution adaptive signal transmission method according to claim 5, wherein the signal conversion chip further comprises a first I2C interface and a second I2C interface;
the step of the signal conversion chip obtaining and storing the resolution data of the display device specifically comprises the following steps:
the signal conversion chip acquires and stores resolution data of the display equipment through the first I2C interface;
the step of obtaining the resolution data stored in the signal conversion chip specifically includes:
acquiring and storing the resolution data stored by the signal conversion chip through the second I2C interface;
and/or, the step of transmitting a display signal to the display device for display through the connected signal output channel specifically includes:
transmitting the display signal to the signal conversion chip;
the signal conversion chip converts the display signal into an HDMI format;
and transmitting the converted display signal to the display equipment.
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| CN116828263A (en) * | 2023-08-30 | 2023-09-29 | 华光影像科技有限公司 | 8K4K film and television making interface switching system |
| CN117676060B (en) * | 2024-02-01 | 2024-06-11 | 深圳市灰度科技有限公司 | Video signal transmission circuit and system |
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| CN112383732A (en) | 2021-02-19 |
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