CN113411556B - Asymmetric image transmission method and electronic device thereof - Google Patents
Asymmetric image transmission method and electronic device thereof Download PDFInfo
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- CN113411556B CN113411556B CN202010187033.7A CN202010187033A CN113411556B CN 113411556 B CN113411556 B CN 113411556B CN 202010187033 A CN202010187033 A CN 202010187033A CN 113411556 B CN113411556 B CN 113411556B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application provides an asymmetric image transmission method and an electronic device thereof. The asymmetric image transmission method is suitable for transmitting an image signal between a transmitting end and a receiving end, and comprises the step that the transmitting end modifies the length of a first image pixel which accords with a four-byte mode in the image signal into the length of a second image pixel which accords with a three-byte mode. In the three-byte mode, a plurality of image pixels with the respective second image pixel lengths are respectively transmitted through three transmission channels of the transmission interface. The receiving end modifies the second image pixel length of the image pixels into the first image pixel length of the four-byte mode so as to obtain an image signal.
Description
Technical Field
The present application relates to an image transmission technology, and more particularly, to an asymmetric image transmission method and an electronic device thereof.
Background
The V-by-One data transmission interface is a new mobile equipment display interface capable of supporting 4K, even 8K, 1K resolution, and the interface is composed of main channel (lane) data signals for transmitting image data and auxiliary channel signals for transmitting image related state and control information (HDP hot plug information, LOCK information, etc.). When the transmitting end and the receiving end transmit the image data through the V-by-One interface, the image formats of the transmitting end and the receiving end are the same because of symmetric transmission. When the data transmission interface is used for transmitting based on a three-byte mode (three-byte mode), the corresponding display channel is only an RGB channel, so that the transmitting end can only transmit RGB format images and cannot transmit ARGB format images, and the receiving end can only receive RGB format images and the ARGB format images cannot be transmitted on the hardware design.
However, the advantage of the receiving end being able to receive the image in the ARGB format is that the image can have a gradual effect, so as to meet the requirement of the user interface design of the client. And because the alpha channel (a channel) in the image has been widely used in the image, the limitation that the image of the ARGB format cannot be transmitted in the three-byte mode must be broken.
Disclosure of Invention
In view of this, the present application provides an asymmetric image transmission method, which is suitable for transmitting an image signal between a transmitting end and a receiving end. The asymmetric image transmission method comprises the following steps: the transmitting end modifies a first image pixel length conforming to a four-byte mode (four-byte mode) in the image signal to a second image pixel length conforming to a three-byte mode (three-byte mode). In the three-byte mode, a plurality of image pixels with the respective second image pixel lengths are respectively transmitted through three transmission channels of the transmission interface. The receiving end modifies the second image pixel length of the image pixels into the first image pixel length of the four-byte mode so as to obtain an image signal.
The application also provides an electronic device for asymmetric image transmission, which comprises a transmitting end, a transmitting interface and a receiving end. The transmitting end modifies the first image pixel length conforming to the four-byte mode in the image signal to the second image pixel length conforming to the three-byte mode. The transmission interface is electrically connected with the transmission end, and the transmission interface is used for respectively transmitting a plurality of image pixels with the respective second image pixel length through three transmission channels in a three-byte mode. The receiving end is electrically connected with the transmission interface, and the receiving end modifies the second image pixel length of the image pixels into the first image pixel length of the four-byte mode so as to obtain an image signal.
According to some embodiments, the four byte mode is an ARGB mode and the three byte mode is an RGB mode.
According to some embodiments, the three transmission channels further comprise an R channel, a G channel, and a B channel.
According to some embodiments, the number of pixels of the first image pixel length x 4 is equal to the number of pixels of the second image pixel length x 3.
According to some embodiments, the transport interface is a V-by-One transport interface.
In summary, on the premise of not changing the hardware design, the application applies for modifying the image pixel length, so that the image signal can be transmitted asymmetrically, and the ARGB format image can be transmitted in the three-byte mode to display diversified image effects, thereby effectively solving the limitation of asymmetric transmission and saving the cost of modifying hardware.
Drawings
The foregoing and other objects, features, advantages and embodiments of the application will be apparent from the following description taken in conjunction with the accompanying drawings in which:
fig. 1 is a block diagram of an electronic device according to an embodiment of the present application.
Fig. 2 is a flow chart of an asymmetric image transmission method according to an embodiment of the present application.
Fig. 3 is a transmission schematic diagram of transmitting RGB format images according to an embodiment of the present application.
Fig. 4 is a transmission schematic diagram of transmitting an image in an ARGB format according to an embodiment of the present application.
Symbol description:
10: electronic device
12: transmitting end
122: first conversion unit
14: transmission interface
16: receiving terminal
162: second conversion unit
S10-S14: step (a)
Detailed Description
The color used for the ARGB format image is RGB plus an opacity parameter, which can be any RGB color space, the opacity parameter is denoted as alpha channel (A channel), if the A channel value of a pixel is 0%, it is completely transparent (i.e. invisible), and the A channel value is 100% it means a completely opaque pixel, so that the pixel can be displayed through the background by using a value between 0% and 100%, and the image has a gradient display effect (translucency). Therefore, in order to display diversified image effects, the application breaks the limitation that the RGB channel in the three-byte mode cannot transmit the ARGB format image, improves the compatibility of the transmission interface, and can transmit the RGB format image and the ARGB format image.
For example, the video format of a video (video) signal is usually in a three-byte mode, the video format of a User Interface (UI) is usually in a four-byte mode, and in order to transmit the video signal of the user interface to a video signal transmission interface, the video signal of the four-byte mode must be modified into the video signal of the three-byte mode, so as to transmit the video signal without changing the hardware design.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present application, and referring to fig. 1, an electronic device 10 includes a transmitting end 12, a transmitting interface 14, and a receiving end 16. The transmitting end 12 is electrically connected to the transmitting interface 14, and the transmitting interface 14 is electrically connected to the receiving end 16, so that the image is transmitted between the transmitting end 12 and the receiving end 16 by using the transmitting interface 14. In One embodiment, the transmitting end 12 is a graphics direct memory access (Graphic direct memory access, GDMA) chip, the receiving end 16 is a write direct memory access (Write direct memory access, WDMA) chip, and the transmission interface 14 is a V-by-One transmission interface, but is not limited thereto.
Fig. 2 is a flow chart of an asymmetric image transmission method according to an embodiment of the present application, please refer to fig. 1 and 2, wherein the asymmetric image transmission method includes: when the transmitting end 12 receives the image signal in the four-byte mode, the four-byte mode is the ARGB mode, as shown in step S10, the transmitting end 12 modifies the first image pixel length corresponding to the four-byte mode in the image signal to the second image pixel length corresponding to the three-byte mode, the three-byte mode is the RGB mode, wherein the second image pixel length is larger than the first image pixel length. In step S12, in the three-byte mode, the plurality of image pixels with the respective second image pixel lengths are respectively transmitted through the three transmission channels of the transmission interface 14, for example, the transmission interface 14 includes an R channel, a G channel and a B channel, so as to respectively transmit the image pixels with the second image pixel lengths in the R channel, the G channel and the B channel. Finally, as shown in step S14, after receiving the image pixels conforming to the second image pixel length, the receiving end 16 modifies and restores the second image pixel length of the image pixels to the first image pixel length conforming to the four-byte mode to obtain the original image signal, so that the receiving end 16 can display the diversified image effects of the ARGB format image.
Wherein, the four-byte mode has four bits of ARGB, the three-byte mode has three bits of RGB, when the total number of transmitted image pixels is the same, the second image pixel length is larger than the first image pixel length, and the number of pixels of the first image pixel length x 4 is equal to the number of pixels of the second image pixel length x 3.
In one embodiment, the transmitting end 12 further includes a first conversion unit 122, and the transmitting end 12 modifies the first image pixel length of the four-byte mode to the second image pixel length of the three-byte mode by using the first conversion unit 122. The receiving end 16 further includes a second conversion unit 162, and the receiving end 16 uses the second conversion unit 162 to modify the second image pixel length of the image pixels to the first image pixel length corresponding to the four-byte mode so as to restore the original image signal.
In one embodiment, fig. 3 is a schematic diagram of transmission of RGB format images according to an embodiment of the present application, please refer to fig. 1 and 3, in which the transmission end 12 respectively transmits a plurality of image pixels with the same image pixel length by using the transmission channels (R channel, G channel and B channel) of the transmission interface 14 in the RGB mode, and the image pixel length is 1920pixels without modifying the image pixel length. The image pixels of each row are transmitted to the receiving end 16 through the transmission interface 14, and the receiving end 16 also receives the image pixels with the same image pixel length to obtain an image signal with an RGB format image.
In one embodiment, fig. 4 is a transmission schematic diagram of an image in an ARGB format according to an embodiment of the present application, please refer to fig. 1 and fig. 4 at the same time, when the image in the ARGB format is transmitted in the RGB mode, the image signal originally received by the transmitting end 12 is a plurality of rows of image pixels with a first image pixel length, and the first image pixel length is 1920pixels (the total image pixel number is 1920×4=7680 pixels). In order to transmit the image signal on the RGB-mode transmission interface 14, the first conversion unit 122 of the transmitting end 12 modifies all the image pixels from the first image pixel length of the ARGB mode to the second image pixel length of the RGB mode, as shown in table 1, since only the R channel, the G channel and the B channel in the RGB mode are transmitted, the image pixel length is increased, and the second image pixel length is 2560pixels (the total image pixel number is 2560×3=7680 pixels). In the RGB mode, the three transmission channels of the transmission interface 14 are used to transmit the image pixels with the second image pixel length to the receiving end 16, that is, the image pixels with the second image pixel length (abgragr …) are transmitted in the R channel, the image pixels with the second image pixel length (rabgarg …) are transmitted in the G channel, and the image pixels with the second image pixel length (gragragrab …) are transmitted in the B channel, so as to transmit the image pixels of the complete row. After the receiving end 16 receives the image pixels having the second image pixel length, the second converting unit 162 of the receiving end 16 modifies all the image pixels from the second image pixel length of the RGB mode to the first image pixel length of the ARGB mode, as shown in table 2, at this time, the second image pixel length of 2560pixels is modified to the first image pixel length of 1920pixels, and the image signal obtained by the receiving end 16 is an ARGB format image. Therefore, the image signal with the image in the ARGB format can be smoothly transmitted from the transmitting end 12 to the receiving end 16 through the RGB mode transmission interface 14 by means of modifying the pixel length of the image, so that the image in the ARGB format can be transmitted under the hardware with fewer display channels, and the image in the ARGB format can be displayed on the receiving end 16.
Table 1 video pixel format output by the transmitting end
| pixel0 | pixel1 | pixel2 | pixel3 | pixel4 | pixel5 | pixel6 | pixel7 | |
| A channel | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| R channel | A | B | G | R | A | B | G | R |
| G channel | R | A | B | G | R | A | B | G |
| B channel | G | R | A | B | G | R | A | B |
Table 2 image pixel format after receiving end conversion
| pixel0 | pixel1 | pixel2 | pixel3 | pixel4 | pixel5 | |
| A channel | A | A | A | A | A | A |
| R channel | R | R | R | R | R | R |
| G channel | G | G | G | G | G | G |
| B channel | B | B | B | B | B | B |
Therefore, on the premise of not changing the hardware design, the application applies for modifying the length of the image pixels, so that the image signals can be transmitted asymmetrically, and the ARGB format images can be transmitted under the hardware of a three-byte mode to display diversified image effects, thereby effectively solving the limitation of asymmetric transmission and saving the cost of modifying the hardware.
The above-described embodiments are only for illustrating the technical concept and features of the present application, and are intended to enable those skilled in the art to understand the content of the present application and implement the same, and should not be construed as limiting the scope of the present application, i.e. all equivalent changes or modifications made according to the inventive concept disclosed in the present application are still included in the scope of the present application.
Claims (4)
1. An asymmetric image transmission method, wherein the asymmetric image transmission method is suitable for transmitting an image signal between a transmitting end and a receiving end, and the asymmetric image transmission method comprises:
the transmitting end modifies the first image pixel length conforming to the four-byte mode in the image signal into the second image pixel length conforming to the three-byte mode;
in the three-byte mode, respectively transmitting a plurality of image pixels with the respective second image pixel lengths through three transmission channels of a transmission interface; and
the receiving end modifies the second image pixel length to the first image pixel length of the four-byte mode so as to obtain the image signal; the second image pixel length is greater than the first image pixel length, and the number of pixels of the first image pixel length is equal to the number of pixels of the second image pixel length by 4;
wherein the three transmission channels between the transmitting end and the receiving end comprise an R channel, a G channel and a B channel,
the transmitting end modifying the first image pixel length conforming to the four-byte mode to the second image pixel length conforming to the three-byte mode in the image signal comprises:
sequentially corresponding each byte in the four-byte mode to the R channel, the G channel and the B channel according to the arrangement sequence to obtain a second image pixel on each transmission channel in the three-byte mode, wherein the second image pixel of the R channel is a repeated ABGR, the second image pixel of the G channel is a repeated RABG, and the second image pixel of the B channel is a repeated GRAB;
the receiving end modifying the second image pixel length to the first image pixel length of the four-byte mode to obtain the image signal includes:
and sequentially sequencing the second image pixels on the R channel, the G channel and the B channel according to a corresponding mode to obtain the image signal in the four-byte mode of the ARGB.
2. The method of claim 1, wherein the transmission interface is a V-by-One transmission interface.
3. An electronic device for asymmetric image transmission, comprising:
the transmitting end modifies the length of a first image pixel conforming to the four-byte mode in the image signal into the length of a second image pixel conforming to the three-byte mode;
the transmission interface is electrically connected with the transmission end, and is used for respectively transmitting a plurality of image pixels with the respective second image pixel lengths through three transmission channels in the three-byte mode; and
the receiving end is electrically connected with the transmission interface, and the receiving end modifies the second image pixel length into the first image pixel length of the four-byte mode so as to obtain the image signal; the second image pixel length is greater than the first image pixel length, and the number of pixels of the first image pixel length is equal to the number of pixels of the second image pixel length by 4;
wherein the three transmission channels between the transmitting end and the receiving end comprise an R channel, a G channel and a B channel,
the transmitting end is specifically configured to:
sequentially corresponding each byte in the four-byte mode to the R channel, the G channel and the B channel according to the arrangement sequence to obtain a second image pixel on each transmission channel in the three-byte mode, wherein the second image pixel of the R channel is a repeated ABGR, the second image pixel of the G channel is a repeated RABG, and the second image pixel of the B channel is a repeated GRAB;
the receiving end is specifically configured to:
and sequentially sequencing the second image pixels on the R channel, the G channel and the B channel according to a corresponding mode to obtain the image signal in the four-byte mode of the ARGB.
4. The electronic device for asymmetric image transmission as claimed in claim 3, wherein said transmitting end further comprises a first converting unit, said first converting unit modifying said first image pixel length of said four-byte mode to said second image pixel length of said three-byte mode.
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