CN113119866B - Rearview mirror display method and device based on streaming media - Google Patents
Rearview mirror display method and device based on streaming media Download PDFInfo
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- CN113119866B CN113119866B CN202110519123.6A CN202110519123A CN113119866B CN 113119866 B CN113119866 B CN 113119866B CN 202110519123 A CN202110519123 A CN 202110519123A CN 113119866 B CN113119866 B CN 113119866B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/60—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by monitoring and displaying vehicle exterior scenes from a transformed perspective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/8046—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for replacing a rear-view mirror system
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Abstract
The embodiment of the invention discloses a rearview mirror display method and device based on streaming media. The rear view mirror display method is performed by a streaming-based rear view mirror display device, the display device comprises a rearview mirror camera module and a streaming media platform; the display method comprises the following steps: after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and is switched from the current frame of picture to the target visual angle; when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module; after receiving the visual angle switching instruction, the rearview mirror camera module resets the memory in the gap time of the current frame and the next frame and switches the current display visual angle to the target visual angle. Therefore, the switching of the view pictures can be smooth when the view is switched, so that the unstable video stream output is eliminated.
Description
Technical Field
The embodiment of the invention relates to a rearview mirror display technology, in particular to a rearview mirror display method and a display device based on streaming media.
Background
In the vehicle-mounted rearview mirror display technology, a rearview mirror acquires a vehicle rearview mirror picture signal and then transmits the vehicle rearview mirror picture signal to a vehicle-mounted display terminal through a streaming media for displaying. Generally, the view angle of the rearview mirror includes an upper view angle, a middle view angle and a lower view angle, and a user can acquire the picture information of each view angle of the rearview mirror according to needs.
However, when the upper, middle and lower viewing angles are switched, there is a need for changing the display image, for example, when the viewing angles are switched, the rear view mirror sensor needs to reset the register first and then the viewing angles are switched, and due to the time difference caused by the reset of the register of the rear view mirror sensor, the video stream is interrupted briefly and captured by human eyes, so that image flicker or even a black image appears when the viewing angles are switched, which is easily regarded as an abnormal image complaint by customers.
Disclosure of Invention
The invention provides a rearview mirror display method and a rearview mirror display device based on streaming media, which are used for realizing smooth switching of display pictures and avoiding the situation of picture flicker and even black pictures when the view angles of the pictures are switched.
In a first aspect, an embodiment of the present invention provides a rearview mirror display method based on streaming media, where the display method is executed by a rearview mirror display device based on streaming media, and the display device includes a rearview mirror camera module and a streaming media platform; the display method comprises the following steps:
after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and is switched from the current frame of picture to a target visual angle;
when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module;
and after receiving the visual angle switching instruction, the rearview mirror camera module resets the memory in the gap time of the current frame picture and the next frame picture and switches the current display visual angle to the target visual angle.
Optionally, the length of time for resetting the memory of the rearview mirror camera module is less than the length of time of the gap time between the current frame of picture and the next frame of picture.
Optionally, the length of time for resetting the memory of the rearview mirror camera module is less than or equal to 15 milliseconds.
Optionally, before and/or while the streaming media platform receives a user-input view switching command;
the rearview mirror camera module sends a video stream picture signal and a field synchronizing signal to the streaming media platform; wherein the video stream picture signal comprises a multi-frame picture effective signal and a gap ineffective signal between adjacent frame picture effective signals; the field synchronizing signal comprises an effective field signal corresponding to each frame of picture effective signal and a gap ineffective field signal adjacent to the effective field signal;
after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under a current visual angle and is switched from a current frame of picture to a target visual angle, and the picture switching signal comprises:
and after receiving a visual angle switching command input by a user, the streaming media platform acquires the gap invalid signal at the moment when the effective field signal corresponding to the current frame transmitted under the current visual angle of the rearview mirror camera module jumps to the gap invalid signal as the frame switching signal.
Optionally, the picture switching signal is a rising edge signal or a falling edge signal.
Optionally, the video stream sent by the rearview mirror camera module to the streaming media platform has a picture size of 1920 × 384.
Optionally, after the rearview mirror image capturing module receives the view switching instruction, resetting a memory in a gap time between the current frame image and the next frame image, and switching the current display view to a target view, the method further includes:
and the rearview mirror camera module acquires a first frame of picture currently acquired under the target visual angle as the next frame of picture and transmits the next frame of picture to the streaming media platform.
In a second aspect, an embodiment of the present invention further provides a rearview mirror display device based on streaming media, where the display device includes a rearview mirror camera module and a streaming media platform;
the streaming media platform is used for acquiring a picture switching signal of a next frame of picture, which is transmitted under the current visual angle of the rearview mirror camera module and is switched from a current frame of picture to a target visual angle, after receiving a visual angle switching command input by a user;
and the camera module is used for sending a visual angle switching instruction to the rearview mirror camera module when the picture switching signal is detected;
and the rearview mirror camera module is used for resetting the memory in the gap time of the current frame picture and the next frame picture after receiving the visual angle switching instruction and switching the current display visual angle to a target visual angle.
Optionally, the rear view mirror camera module comprises a sensor and a first deserializer, the sensor and the first deserializer being electrically connected.
Optionally, the streaming media platform includes a single chip microcomputer, a second deserializer and a display, and the single chip microcomputer is electrically connected to the second deserializer and the display, respectively.
The invention provides a rearview mirror display method and a display device based on streaming media, wherein the rearview mirror display method is executed by the rearview mirror display device based on the streaming media, and the display device comprises a rearview mirror camera module and a streaming media platform; the display method comprises the following steps: after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and is switched from the current frame of picture to the target visual angle; when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module; after receiving the visual angle switching instruction, the rearview mirror camera module resets the memory in the gap time of the current frame and the next frame and switches the current display visual angle to the target visual angle. Therefore, when the visual angle needs to be switched, after the streaming media platform receives a visual angle switching command input by a user, a visual angle switching instruction is not immediately sent to the rearview mirror camera module, but a visual angle switching instruction is sent to the rearview mirror camera module after a picture switching signal is detected, then the rearview mirror camera module completes memory resetting and visual angle switching in the gap time of the upper frame of picture and the lower frame of picture after receiving the visual angle switching instruction, so that the memory resetting and the visual angle switching action can be controlled to be completed in the gap time of the upper frame of picture and the lower frame of picture, the switching of the visual angle pictures is smooth, the unstable condition of video stream output is eliminated, and the problems that in the prior art, due to the time difference from the time when the resetting instruction is received to the time when the memory is reset, the video stream is temporarily interrupted, captured by human eyes, and the pictures flicker and even black pictures appear when the visual angle is switched are solved.
Drawings
FIG. 1 is a flow chart of a method for displaying a rearview mirror based on streaming media in an embodiment of the invention;
FIG. 2 is a timing diagram of a transmission signal according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for displaying a rearview mirror based on streaming media in an embodiment of the present invention;
FIG. 4 is a timing diagram of another transmission signal in an embodiment of the present invention;
fig. 5 is a block diagram of a rear view mirror display device based on streaming media according to an embodiment of the present invention;
fig. 6 is a block diagram of another rearview mirror display device based on streaming media according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a rearview mirror display method based on streaming media according to an embodiment of the present invention. The present embodiment is applicable to the implementation process of the rearview mirror display method based on streaming media, and the method can be executed by the rearview mirror display device based on streaming media according to the embodiment of the present invention, where the display device includes a rearview mirror camera module and a streaming media platform; referring to fig. 1, the display method specifically includes the following steps:
the rearview mirror can have multiple working visual angles, and is optional, the multiple working visual angles comprise an upper working visual angle, a middle working visual angle and a lower working visual angle, and a user can switch visual angles in the three working visual angles according to needs to display needed visual angle pictures. The visual angle switching command input by the user comprises a command for switching from an upper visual angle to a middle visual angle, a command for switching from the upper visual angle to a lower visual angle, a command for switching from the middle visual angle to the upper visual angle, a command for switching from the lower visual angle to the upper visual angle and a command for switching from the lower visual angle to the middle visual angle. For example, assuming that the current display view angle is an upper view angle, if the user wants to display a picture with a middle view angle, the user directly inputs a command for switching from the upper view angle to the middle view angle to the streaming media platform, and after receiving the command for switching from the upper view angle to the middle view angle, which is input by the user, the streaming media platform acquires a picture switching signal of a next frame of picture, in which a current frame of picture transmitted under the current view angle (e.g., the upper view angle) of the rearview mirror module is switched to a target view angle (e.g., the middle view angle).
And step 120, when the picture switching signal is detected, sending an angle-of-view switching instruction to the rearview mirror camera module.
The view switching command may include a command to switch from an upper view to a middle view, a command to switch from an upper view to a lower view, a command to switch from a middle view to an upper view, a command to switch from a lower view to an upper view, and a command to switch from a lower view to a middle view.
And step 130, after the rearview mirror camera module receives the visual angle switching instruction, resetting the memory in the gap time of the current frame and the next frame, and switching the current display visual angle to the target visual angle.
Compared with the situation that the stream media platform immediately sends the visual angle switching instruction to the rearview mirror camera module after receiving the visual angle switching instruction input by the user, the stream media platform does not immediately send the visual angle switching instruction to the rearview mirror camera module after receiving the visual angle switching instruction input by the user, but only sends the visual angle switching instruction to the rearview mirror camera module when detecting the picture switching signal, and the rearview mirror camera module resets the memory in the gap time of the current frame picture and the next frame picture after receiving the visual angle switching instruction and switches the current display visual angle to the target visual angle, so that the time for the rearview mirror camera module to respond to the visual angle switching instruction to carry out memory resetting and visual angle switching is completed in the gap time of the current frame picture and the next frame picture, and the normal display of the upper frame picture and the lower frame picture cannot be influenced by the time difference caused by the memory resetting, and the time difference caused by the rearview mirror camera module to immediately respond to the visual angle switching instruction at any moment can be avoided, so that the video stream is temporarily interrupted and captured by human eyes and the flicker and even black picture occurs during the visual angle switching.
The time length of the gap time between the current frame picture and the next frame picture can meet the smooth switching of the upper frame picture and the lower frame picture, the pictures observed by human eyes cannot have the situations of picture flicker and transient interruption, the specific time length can be set according to specific situations, and no specific limitation is made herein.
Fig. 2 is a timing diagram of a transmission signal according to an embodiment of the present invention, where fig. 2 shows a viewing angle switching signal S1, a video stream picture signal S2 transmitted from the rear view mirror image capturing module to the streaming media platform, and a memory resetting signal S3 of the rear view mirror image capturing module.
In the technical solution of this embodiment, with reference to fig. 1 and fig. 2, the operation principle of the rearview mirror display method based on streaming media is as follows: fig. 2 shows a current view angle A0, a target view angle B0, a current frame image A1, and a next frame image B1, when a user needs to switch a view angle, a view angle switching command is input to the streaming media platform, and after the streaming media platform receives the view angle switching command input by the user (for example, when a view angle switching signal S1 jumps from a high level to a low level at time t1 in fig. 2, the streaming media platform receives the view angle switching command), the streaming media platform does not immediately send a view angle switching instruction to the rearview mirror image capturing module, but obtains a frame switching signal of the next frame image, which is switched from the current frame image transmitted under the current view angle of the rearview mirror image capturing module to the target view angle, and enters a state waiting to be sent (corresponding to a state of the view angle switching signal S1 at the low level) during the period when the streaming media platform obtains the frame switching signal; when a picture switching signal is detected at time t2 in fig. 2 (when a corresponding video stream picture signal S2 jumps from a high level to a low level), sending a view angle switching instruction to the rearview mirror camera module, that is, when a stream media platform receives a view angle switching command input by a user at time t1, the stream media platform does not immediately send the view angle switching instruction to the rearview mirror camera module but sends the view angle switching instruction when waiting for detecting the picture switching signal, for example, in fig. 2, a view angle switching signal S1 is switched from a high level to a low level at time t1, and the low level jumps to a high level signal until the picture switching signal is detected at time t 2; after receiving the view angle switching instruction, the rearview mirror image capturing module resets the memory (corresponding to the low level stage of the memory reset signal S3) in the gap time (e.g., the T0 time period in fig. 2) between the current frame and the next frame, and switches the current display view angle to the target view angle, for example, in fig. 2, the memory reset signal S3 jumps from the low level to the high level at the time T3 to indicate that the rearview mirror image capturing module switches the current view angle to the target view angle, and the video stream picture signal S2 jumps from the low level to the high level after the T0 time period ends to indicate that the first frame under the target view angle starts to transmit the frame picture signal. Therefore, compared with the situation that the streaming media platform immediately sends the visual angle switching instruction to the rearview mirror camera module after receiving the visual angle switching instruction input by the user, the streaming media platform does not immediately send the visual angle switching instruction to the rearview mirror camera module after receiving the visual angle switching instruction input by the user, but only sends the visual angle switching instruction to the rearview mirror camera module when detecting the picture switching signal, then the rearview mirror camera module completes memory resetting and visual angle switching in the gap time of the two frames of pictures after receiving the visual angle switching instruction, so that the memory resetting and the visual angle switching can be controlled to be completed in the gap time of the two frames of pictures, the switching of the visual angle pictures is smooth, the unstable video stream output condition is eliminated, and the problems that the video stream is momentarily interrupted, captured by human eyes and the pictures flicker or even black pictures occur when the visual angle is switched due to the time difference from the time when the memory resetting instruction is received to the time when the memory is completely reset in the prior art are solved.
Optionally, after the rearview mirror image capturing module receives the view switching instruction, resetting the memory within a gap time between the current frame image and the next frame image, and switching the current display view to the target view, the method further includes:
and the rearview mirror camera module acquires the first frame of picture currently acquired at the target visual angle as the next frame of picture and transmits the next frame of picture to the streaming media platform.
After the current display visual angle is switched to the target visual angle by the rearview mirror camera module, the first frame of picture under the target visual angle is taken as the next frame of picture, on one hand, the picture transmission can be more continuous, and the problems that the display picture flickers or even is blacked due to the short interruption of the video stream picture are avoided; on the other hand, the video stream picture under the target visual angle can be timely and effectively transmitted, and the method and the device are convenient for timely and more comprehensively acquiring the image information under the target visual angle.
According to the technical scheme of the embodiment, the rearview mirror display method based on the streaming media is provided, and is executed by a rearview mirror display device based on the streaming media, wherein the display device comprises a rearview mirror camera module and a streaming media platform; the display method comprises the following steps: after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and is switched from the current frame of picture to the target visual angle; when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module; after receiving the visual angle switching instruction, the rearview mirror camera module resets the memory in the gap time of the current frame and the next frame and switches the current display visual angle to the target visual angle. Therefore, when the visual angle needs to be switched, after the streaming media platform receives a visual angle switching command input by a user, a visual angle switching instruction is not immediately sent to the rearview mirror camera module, but a visual angle switching instruction is sent to the rearview mirror camera module after a picture switching signal is detected, then the rearview mirror camera module completes memory resetting and visual angle switching in the gap time of the upper frame of picture and the lower frame of picture after receiving the visual angle switching instruction, so that the memory resetting and the visual angle switching action can be controlled to be completed in the gap time of the upper frame of picture and the lower frame of picture, the switching of the visual angle pictures is smooth, the unstable condition of video stream output is eliminated, and the problems that in the prior art, due to the time difference from the time when the resetting instruction is received to the time when the memory is reset, the video stream is temporarily interrupted, captured by human eyes, and the pictures flicker and even black pictures appear when the visual angle is switched are solved.
Optionally, the duration of the memory reset by the rearview mirror camera module is less than the duration of the gap time between the current frame of picture and the next frame of picture.
Referring to fig. 2, T1 is a time length for resetting the memory of the rearview mirror image pickup module, T0 is a time length of a gap time between a current frame image and a next frame image, and T1 is smaller than T0. By the arrangement, the memory resetting of the rearview mirror camera module can be completed within the time T0, and the normal switching of two adjacent frames of pictures can not be influenced, so that the normal display of the pictures is ensured.
Optionally, the length of time that the rearview mirror camera module resets the memory is less than or equal to 15 milliseconds.
The time length for resetting the memory of the rearview mirror camera module can be 14 milliseconds, 14.5 milliseconds and the like, the specific value can be set according to actual conditions, as long as the time length less than the gap time between the current frame picture and the next frame picture is met, and the specific value is not specifically limited herein.
Fig. 3 is a flowchart of another method for displaying a rearview mirror based on streaming media according to an embodiment of the present invention. Referring to fig. 3, optionally, the streaming media-based rearview mirror display method includes the following steps:
step 210 the method comprises the steps that a streaming media platform receives a visual angle switching command input by a user;
before and/or while the streaming media platform receives a visual angle switching command input by a user, the rearview mirror camera module sends a video streaming picture signal and a field synchronization signal to the streaming media platform. The rearview mirror camera module sends a video stream picture signal to the streaming media platform and also sends a field synchronization signal, so that the video stream picture signal can be ensured not to be damaged and can be accurately transmitted to the streaming media platform. The video stream picture signal and the field synchronizing signal have the same scanning frequency and the same initial phase, and the signals of the video stream picture signal and the field synchronizing signal are synchronous.
Fig. 4 is a timing diagram of another transmission signal according to an embodiment of the present invention. Fig. 4 shows a field sync signal S4 of a video stream transmitted by the rearview mirror camera module to the streaming media platform, and referring to fig. 4, for example, when the valid signal is at a high level and the invalid signal is at a low level, the video stream picture signal S2 includes a multi-frame picture valid signal (corresponding to the high level signal in the video stream picture signal S2 in fig. 4) and a gap invalid signal between adjacent frame picture valid signals (corresponding to the low level signal in the video stream picture signal S2 in fig. 4); the field sync signal S4 includes a valid field signal corresponding to each frame picture valid signal (corresponding to the middle and high level signal of the field sync signal S4 in fig. 4) and a gap null field signal of adjacent valid field signals (corresponding to the low level signal of the field sync signal S4 in fig. 4).
after receiving a visual angle switching command input by a user, the streaming media platform acquires a gap invalid signal at the moment when an effective field signal corresponding to a current frame image transmitted under the current visual angle of the rearview mirror camera module jumps to the gap invalid signal as an image switching signal.
The method for acquiring the picture switching signal of the next frame of picture switched from the current frame of picture to the target view angle transmitted under the current view angle of the rearview mirror camera module by the streaming media platform after receiving the view angle switching command input by a user comprises the following steps: after receiving a view angle switching command input by a user, the streaming media platform acquires a gap invalid signal at a transition time from an effective field signal corresponding to a current frame picture transmitted by the rearview mirror camera module to the gap invalid signal as a picture switching signal, for example, in fig. 4, a transition of a field synchronization signal S4 from a high level signal to a low level signal at a time t2 indicates a gap invalid signal at a transition time from an effective field signal corresponding to the current frame picture to the gap invalid signal.
And 240, when the picture switching signal is detected, sending an angle-of-view switching instruction to the rearview mirror camera module.
In step 250, after the rearview mirror camera module receives the view switching instruction, the memory is reset in the gap time between the current frame and the next frame, and the current display view is switched to the target view.
Alternatively, the picture switching signal is a rising edge signal or a falling edge signal.
The video stream picture signal comprises a multi-frame picture effective signal and a gap ineffective signal between adjacent frame picture effective signals; the field sync signal includes an active field signal corresponding to each frame picture active signal and a gap null field signal of adjacent active field signals. When the high level is used as an effective signal and the low level is used as an ineffective signal, the picture switching signal is a falling edge signal; when the low level is used as an effective signal and the high level is used as an ineffective signal, the picture switching signal is a rising edge signal.
Alternatively, assuming that the active signal is at a high level and the inactive signal is at a low level as an example, referring to fig. 4, at time t2, a rising edge of the view switching signal S1, a falling edge of the video stream picture signal S2, a falling edge of the memory reset signal S3, and a falling edge of the field sync signal S4 overlap.
Optionally, the video stream pictures sent by the rearview mirror camera module to the streaming media platform have a picture size of 1920 × 384.
Typically, the size of the frames output by the rearview mirror camera module to the streaming media platform is 1920 × 1080, but due to the limited display space of the streaming media platform, the frames synchronized to 1920 × 1080 need to be cropped to 1920 × 384 frames in real time. In the prior art, the following steps are generally adopted: the camera outputs 1920 × 1080 full-width video stream pictures to the streaming media internal rear-view mirror, and the streaming media internal rear-view mirror cuts the pictures into 1920 × 384 pictures by using image processing and memory built in an on-chip operating System (SoC) and outputs the pictures to a display screen. However, the scheme has a large requirement on the workload of software and hardware, the product development cycle is long, meanwhile, the full-screen transmission scheme has a high requirement on the bandwidth specifications of a transmission cable, a connector, a transmitting chip and a receiving chip, and the overall BOM cost is increased (about 3 to 5 times of a low-cost chip). Therefore, in the solution of this embodiment, the rear view mirror camera module continuously outputs 1920 × 384 frames meeting the frame size requirement to the streaming media platform, so that the display space of the streaming media platform can be reduced, and the streaming media platform can directly display the frames without cutting the frames.
Fig. 5 is a block diagram of a rear view mirror display device based on streaming media according to an embodiment of the present invention. The embodiment of the invention provides a rearview mirror display device based on streaming media, and referring to fig. 5, the display device comprises a rearview mirror camera module 10 and a streaming media platform 20;
the streaming media platform 20 is configured to, after receiving a viewing angle switching command input by a user, acquire a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module 10 at a current viewing angle and is switched from a current frame of picture to a target viewing angle;
when the picture switching signal is detected, sending a view angle switching instruction to the rearview mirror camera module 10;
the rearview mirror camera module 10 is configured to reset the memory within a gap time between a current frame and a next frame after receiving the view switching instruction, and switch the current display view to the target view.
According to the technical scheme of the embodiment, the rearview mirror display device based on the streaming media is provided, and comprises a rearview mirror camera module and a streaming media platform; the system comprises a streaming media platform, a rearview mirror camera module, a target visual angle switching module and a video processing module, wherein the streaming media platform is used for acquiring a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under a current visual angle and is switched from a current frame of picture to the target visual angle, after receiving a visual angle switching command input by a user; when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module; and the rearview mirror camera module is used for resetting the memory in the gap time of the current frame and the next frame after receiving the visual angle switching instruction and switching the current display visual angle to the target visual angle. Therefore, when the visual angle needs to be switched, after the streaming media platform receives a visual angle switching command input by a user, a visual angle switching instruction is not immediately sent to the rearview mirror camera module, but a visual angle switching instruction is sent to the rearview mirror camera module after a picture switching signal is detected, then the rearview mirror camera module completes memory resetting and visual angle switching in the gap time of the upper frame of picture and the lower frame of picture after receiving the visual angle switching instruction, so that the memory resetting and the visual angle switching action can be controlled to be completed in the gap time of the upper frame of picture and the lower frame of picture, the switching of the visual angle pictures is smooth, the unstable condition of video stream output is eliminated, and the problems that in the prior art, due to the time difference from the time when the resetting instruction is received to the time when the memory is reset, the video stream is temporarily interrupted, captured by human eyes, and the pictures flicker and even black pictures appear when the visual angle is switched are solved.
Fig. 6 is a block diagram of another rear view mirror display device based on streaming media according to an embodiment of the present invention. In one embodiment, referring to fig. 6, the rearview mirror camera module 10 includes a sensor 11 and a first deserializer 12, the sensor 11 and the first deserializer 12 being electrically connected.
The sensor 11 is configured to acquire a video stream picture at a current viewing angle (any one of an upper viewing angle, a middle viewing angle, and a lower viewing angle), and continuously output a 1920 × 384 picture to the streaming media platform 20 through the first deserializer 12. Wherein the first deserializer 12 is for transmitting a video stream picture signal.
With continued reference to fig. 6, the streaming media platform 20 includes a single chip 21, a second deserializer 22 and a display 23, and the single chip 21 is electrically connected to the second deserializer 22 and the display 23, respectively.
The second deserializer 22 is further electrically connected to the first deserializer 12, the second deserializer 22 is configured to receive the video stream picture signal sent by the first deserializer 12 and send the video stream picture signal to the single chip 21, and the single chip 21 directly outputs the video stream picture signal to the display 23 for displaying after receiving the video stream picture signal. The single chip 21 may be stm32, 51, etc., and has better performance and lower cost compared with the scheme of using an on-chip operating system in the streaming media in the prior art. The display 23 may be a display screen or the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A rearview mirror display method based on streaming media is characterized in that the display method is executed by a rearview mirror display device based on the streaming media, and the display device comprises a rearview mirror camera module and a streaming media platform; the display method comprises the following steps:
after receiving a visual angle switching command input by a user, the streaming media platform does not immediately send a visual angle switching command to the rearview mirror camera module, but acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and switches a current frame of picture to a target visual angle; the visual angle of the rearview mirror camera module comprises an upper working visual angle, a middle working visual angle and a lower working visual angle;
when the picture switching signal is detected, sending a visual angle switching instruction to the rearview mirror camera module;
after receiving the visual angle switching instruction, the rearview mirror camera module resets a memory in the gap time of the current frame picture and the next frame picture and switches the current display visual angle to a target visual angle; after the rearview mirror camera module receives the view switching instruction, resetting a memory in the gap time between the current frame picture and the next frame picture, and switching the current display view to a target view, the method further comprises:
and the rearview mirror camera module acquires a first frame of picture currently acquired under the target visual angle as the next frame of picture and transmits the next frame of picture to the streaming media platform.
2. The method as claimed in claim 1, wherein the time period for resetting the memory of the rearview mirror camera module is less than the time period of the gap between the current frame and the next frame.
3. The streaming-based rearview mirror display method of claim 2, wherein the time period for resetting the memory of the rearview camera module is less than or equal to 15 milliseconds.
4. The streaming-based rearview mirror display method of claim 1, wherein before or while the streaming platform receives a user-input view switching command;
the rearview mirror camera module sends a video stream picture signal and a field synchronizing signal to the streaming media platform; wherein the video stream picture signal comprises a multi-frame picture effective signal and a gap ineffective signal between adjacent frame picture effective signals; the field synchronizing signal comprises an effective field signal corresponding to each frame of picture effective signal and a gap ineffective field signal adjacent to the effective field signal;
after receiving a visual angle switching command input by a user, the streaming media platform acquires a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under a current visual angle and is switched from a current frame of picture to a target visual angle, and the picture switching signal comprises:
and after receiving a visual angle switching command input by a user, the streaming media platform acquires the gap invalid signal at the moment when the effective field signal corresponding to the current frame transmitted under the current visual angle of the rearview mirror camera module jumps to the gap invalid signal as the frame switching signal.
5. The streaming-based rearview mirror display method as claimed in claim 4, wherein the picture switching signal is a rising edge signal or a falling edge signal.
6. The streaming media-based rearview mirror display method of claim 4, wherein a video streaming picture sent by said rearview camera module to said streaming media platform has a picture size of 1920 x 384.
7. A rearview mirror display device based on streaming media is characterized by comprising a rearview mirror camera module and a streaming media platform;
the streaming media platform is used for not immediately sending a visual angle switching instruction to the rearview mirror camera module after receiving a visual angle switching command input by a user, but acquiring a picture switching signal of a next frame of picture, which is transmitted by the rearview mirror camera module under the current visual angle and is switched from a current frame of picture to a target visual angle; and the camera module is used for sending a visual angle switching instruction to the rearview mirror camera module when the picture switching signal is detected; the visual angle of the rearview mirror camera module comprises an upper working visual angle, a middle working visual angle and a lower working visual angle;
the rearview mirror camera module is used for resetting the memory in the gap time of the current frame picture and the next frame picture after receiving the visual angle switching instruction and switching the current display visual angle to a target visual angle; the rearview mirror camera module is further configured to reset a memory in a gap time between the current frame and the next frame after the rearview mirror camera module receives the view switching instruction, and to acquire a first frame of picture currently acquired at the target view as the next frame of picture and transmit the first frame of picture to the streaming media platform after the current display view is switched to the target view.
8. The streaming media-based rearview mirror display device of claim 7, wherein the rearview camera module comprises a sensor and a first deserializer, the sensor and the first deserializer being electrically connected.
9. The rearview mirror display device based on streaming media of claim 7, wherein the streaming media platform comprises a single chip microcomputer, a second deserializer and a display, and the single chip microcomputer is electrically connected with the second deserializer and the display respectively.
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| CN118259862B (en) * | 2024-05-29 | 2024-09-06 | 山东云海国创云计算装备产业创新中心有限公司 | Display screen switching method, device, medium and computer program product |
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