CN115150286B - Transmission node changing method, device, computer equipment and storage medium - Google Patents
Transmission node changing method, device, computer equipment and storage medium Download PDFInfo
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- CN115150286B CN115150286B CN202210766408.4A CN202210766408A CN115150286B CN 115150286 B CN115150286 B CN 115150286B CN 202210766408 A CN202210766408 A CN 202210766408A CN 115150286 B CN115150286 B CN 115150286B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
Abstract
The disclosure relates to a transmission node changing method, a transmission node changing device, computer equipment and a storage medium. The method comprises the following steps: under the condition that transmission conditions or the topology structure of a transmission link is changed, determining a transmission node to be changed; under the condition that a change enabling time slot in a change frame structure is enabled, according to a link topology adjustment time slot in the change frame structure, adjusting the transmission link topology of a transmission node to be changed, and adjusting resources occupied by the transmission node to be changed through the change frame structure, wherein the change frame structure is obtained by adding a newly enabled time slot into a placement time slot in a standard data frame structure, and the placement time slot comprises: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame; and determining a change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure. By adopting the method, the signaling interaction can be carried out only once, and the resources occupied by the nodes and/or the video terminal and the link topology structure can be adjusted.
Description
Technical Field
The disclosure relates to the technical field of data processing, and in particular relates to a transmission node changing method, a transmission node changing device, computer equipment and a storage medium.
Background
Currently, a video image system, especially, relates to a video image processing system with VESA (Video Electronics Standards Association, video electronic standard association) DisplayPort (DP, digital video interface standard), MIPI (Mobile Industry Processor Interface, mobile industry processor interface standard), HDMI (High Definition Multimedia Interface, high definition multimedia interface standard), etc. to drive and display a display panel and a terminal such as a liquid crystal (LCD, liquid Crystal Display), an Organic Light-Emitting Diode (OLED), etc., when supporting multi-channel display, when a transmission condition or a topology structure of a video transmission link is changed, a number of nodes and/or transmission states of the video terminal itself are changed, and then the video source needs to perform multiple signaling interactions on each node and/or the video terminal, so as to change and adjust resources occupied by each node and/or the video terminal and a link topology, thereby increasing an overhead of the video image processing system.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a transmission node changing method, apparatus, computer device, and storage medium capable of adjusting resources and link topology occupied by a node and/or video terminal by performing only one signaling interaction.
In a first aspect, the present disclosure provides a transmission node changing method. The method is applied to a video source in a video image processing system, the video source changes a transmission node to be changed through changing a frame structure, and the method comprises the following steps:
under the condition that transmission conditions or the topology structure of a transmission link is changed, determining a transmission node to be changed;
under the condition that a change enabling time slot in a change frame structure is enabled, according to a link topology adjustment time slot in the change frame structure, adjusting the transmission link topology of the transmission node to be changed, and adjusting resources occupied by the transmission node to be changed through the change frame structure, wherein the change frame structure is obtained by adding a newly enabled time slot into a placement time slot in a standard data frame structure, and the placement time slot comprises: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame;
And determining a change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure, wherein the change confirmation time slot is fed back by the transmission node to be changed and is used for determining the change result.
In one embodiment, the newly enabled time slot in the change frame structure includes: change enable slot, link topology adjust slot, change slot, and change acknowledge slot:
the change enabling time slot is used for determining whether to enable the change frame structure;
the link topology adjustment time slot is used for determining whether to adjust the topology structure of the transmission link and determining a topology table, wherein the topology table comprises the connection relation of all transmission nodes in the video transmission link;
the change time slot is used for distributing a change allocation table of the transmission node to be changed, and the change allocation table is used for indicating the resources used by the transmission node to be changed;
and the change confirmation time slot is used for determining a change result of the transmission node to be changed.
In one embodiment, the process of obtaining the modified frame structure includes:
under the condition that the virtual video time slot or the filling video time slot meets the newly-started time slot, the placing time slot comprises the virtual video time slot or the filling video time slot, and the newly-started time slot is added in the virtual video time slot or the filling video time slot to obtain a changed frame structure;
Under the condition that the virtual video time slot or the filling video time slot does not meet the newly-started time slot, the placing time slot comprises a virtual video time slot and a filling video time slot, and newly-started time slots are added into the virtual video time slot and the filling video time slot to obtain a changed frame structure;
and under the condition that the virtual video time slot and the filling video time slot do not meet the newly started time slot, the placing time slot comprises a pre-allocated time slot, a virtual video time slot and a filling video time slot in a standard data frame, and the newly started time slot is added in the pre-allocated time slot, the virtual video time slot and the filling video time slot to obtain a changed frame structure.
In one embodiment, the adjusting the transmission link topology of the transmission node to be changed according to the link topology adjustment time slot in the change frame structure includes:
and under the condition that the transmission link topology is determined and regulated according to the link topology regulation time slot, determining the connection relation of the transmission node to be changed in the video transmission link, and regulating the transmission link topology of the transmission node to be changed according to the connection relation.
In one embodiment, the determining the transmission node to be changed in the case that the transmission condition or the topology structure of the transmission link is changed includes:
Under the condition that transmission conditions or the topology structure of a transmission link is changed, determining the transmission state of each transmission node;
and determining the transmission node to be changed according to the transmission node with the changed transmission state.
In one embodiment, the transmission state at least includes:
a silence state, which characterizes that the transmission node does not display video data and transmits the video data to other transmission nodes;
the physical channel changes state, and the representation increases or decreases the number of physical channels used by the transmission node;
the physical channel grouping state is used for representing grouping physical channels used by the transmission nodes, and the grouped physical channels are respectively used for displaying video data and transmitting other transmission nodes of the video data value;
caching transmission states, representing that the transmission nodes cannot normally display received video data, displaying the video data by using the cached video data, and transmitting the video data to other transmission nodes;
the normal display state is characterized in that the transmission node uses the resources pre-allocated by the video source to normally display video data;
the dormant state represents that the physical link of the transmission node is completely closed;
and in an energy-saving state, the representation transmission node performs normal display according to the lowest performance index, wherein the performance index comprises: resolution, frame rate, number of physical channels, and link rate;
And in the no video state, the transmission node is used for displaying the cached video data in a preset time.
In one embodiment, the method further comprises: and in the case that the state of the transmission node is in a dormant state or a video-free state, or in the case that the video source cannot communicate with the transmission node through signaling, communicating with the transmission node through a special sequence field.
In a second aspect, the present disclosure further provides a transmission node changing apparatus. The device is applied to a video source in a video image processing system, the video source changes a transmission node to be changed through a transmission link and a change frame structure, and the device comprises:
the node to be changed determining module is used for determining the transmission node to be changed under the condition that the transmission condition or the topology structure of the transmission link is changed;
a changing module, configured to adjust a transmission link topology of the transmission node to be changed according to a link topology adjustment time slot in a changing frame structure when a changing enabling time slot is enabled in the changing frame structure, and send video data to the transmission node to be changed through the changing frame structure, where the changing frame structure is obtained by placing a time slot filling a newly enabled time slot in a standard data frame structure, and the placing time slot includes: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame;
And the feedback module is used for determining the change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure, wherein the change confirmation time slot is obtained by feeding back the transmission node to be changed and is used for determining the change result.
In a third aspect, the present disclosure also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the steps of the above method when the processor executes the computer program.
In a fourth aspect, the present disclosure also provides a computer-readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the above method.
In a fifth aspect, the present disclosure also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of the above method.
In the above embodiments, the transmission node to be changed is determined under the condition that the transmission condition or the topology structure of the transmission link is changed. The method can only process the transmission node to be changed without changing all the transmission nodes in the transmission link, can improve the processing speed of the system and does not influence other transmission nodes. When a transmission node to be changed needs to be changed, a change frame structure is started, when a change enabling time slot in the change frame structure is started, a time slot is adjusted according to a link topology in the change frame structure, the transmission link topology of the transmission node to be changed is adjusted, resources occupied by the transmission node to be changed are adjusted through the change frame structure, and the change frame structure is obtained by placing a time slot in a standard data frame structure and adding a newly started time slot. Therefore, no extra time slot is occupied, and the overhead of the system can be reduced. And the video source and the transmission node to be changed perform signaling interaction only once through changing the frame structure, namely, the transmission is performed through changing the frame structure. Multiple interactions are not needed, and the overhead of a video image processing system can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a video image processing system in one embodiment;
FIG. 2 is a schematic diagram of a transmission link topology in one embodiment;
FIG. 3 is a flow chart of a method of transmitting node change in one embodiment;
FIG. 4 is a schematic diagram of a modified frame structure in one embodiment;
FIG. 5 is a schematic diagram of a standard data frame structure in one embodiment;
FIG. 6 is a flow diagram of a process change frame structure in one embodiment;
FIG. 7 is a flow chart of step S202 in one embodiment;
FIG. 8 is a block diagram schematically illustrating the structure of a transmission node changing apparatus in one embodiment;
fig. 9 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims herein and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
In this document, the term "and/or" is merely one association relationship describing the associated object, meaning that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
As described in the background art, when nodes and/or video terminals with different capabilities in the multi-channel video data transmission link topology perform video data image data transmission, due to the change of transmission conditions or the link topology structure, the transmission states of a large number of nodes and/or video terminals themselves dynamically change. The video source can change and adjust the state of the node and/or the video terminal with dynamic change, and update the resources (time slots) occupied by the node and/or the video terminal after the state adjustment. However, in the process of adjusting or updating the video source, the signaling interaction when the video data transmission state changes dynamically can obviously increase the overhead of the video image processing system, thereby reducing the effective load of the system and further reducing the throughput. Typically, if a large number of nodes and/or video terminals need to be changed and adjusted, the video source needs to perform signaling interaction once for each node and/or video terminal, and change and adjustment are completed, thus increasing the overhead of the whole video image processing system. Wherein the change in transmission conditions may include: the transmission distance changes, the bit error rate changes, the performance of the node and/or the video terminal changes, the link topology changes, etc. The transmission state may include retransmission, error correction, change in pixel data, lane number change, link rate change, frame change, etc.
Accordingly, to solve the above-mentioned problems, embodiments of the present disclosure provide a transmission node changing method, apparatus, computer device, and storage medium.
First, a video image processing system according to the present disclosure is shown in fig. 1. The video image processing system includes: the system comprises an embedded control module, an FPGA module, an external storage module, a rapid storage module, a peripheral module, a video interface physical layer realization module and a video transmission link.
The embedded control module can use any embedded chip and system, and is mainly responsible for initiating signaling interaction, such as reading/writing registers, starting/closing a video display module, peripheral control, setting parameters of the video display module and the like. The FPGA module is mainly responsible for realizing the implementation parts which need a large amount of data processing and low round trip delay (latency), such as storage control, peripheral control, video interface IP core implementation and the like. The external storage module is mainly responsible for storing the original data stream of the video image to be displayed in the video image processing system, and storage media such as NandFlash, SSD are applied to the part, but not limited to the part. The fast memory module is used in the implementation process of the FPGA module requiring a large amount of data processing and low round trip delay (latency), and the module for storing the latency for reducing the latency is applied to a fast and low latency physical device, such as DDR3, but not limited thereto. Peripheral modules including, but not limited to, GPIO (General-purpose input/output), UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiver Transmitter), USB (Universal Serial Bus ), network ports, and the like. The video interface physical layer implementation module is mainly responsible for the physical layer implementation required for driving the display module, such as, but not limited to, TX/RX (Transmitter/Receiver) -PHY of DisplayPort, DPHY of MIPI, etc.
Further, the FPGA module comprises a bus interaction module, an MCU (Microcontroller Unit, micro control module) video stream preprocessing module, a video data stream transmission control module, a clock control module, an embedded soft core control module, a bus controller module, an internal storage controller module, an external control module, a display clock generator module, a video time sequence controller module and a video interface IP core module. The bus interaction module is mainly responsible for the functions of selection, decision and the like of all other modules connected to the bus interaction module. The MCU video stream preprocessing module is mainly responsible for preprocessing and converting the video data stream input from the external storage module according to the format and the parameter type set by the system so as to facilitate the processing of the later stage. The video data stream transmission control module is mainly responsible for controlling the time sequence, parameters and the like of the data stream after the data stream pretreatment and conversion. The clock control module is mainly responsible for generating and controlling a global clock in the video image processing system. The embedded soft core control module is a control core of the FPGA module and is mainly responsible for the core functions of time sequence control, parameter configuration, physical process realization and the like of all modules in the FPGA module, and the embedded soft core control module can be used in the realization of the time sequence control, parameter configuration, physical process realization and the like, such as Xilinx MicroBlaze and the like, but is not limited to the realization of the time sequence control, parameter configuration, physical process realization and the like. The bus controller module is mainly responsible for controlling all modules connected with the bus interaction module, but is not limited to the bus interaction module. The video pattern processing module is mainly responsible for mode conversion, time sequence control and the like of the video image data stream corresponding to the video interface IP core module, but is not limited to the video pattern processing module. The internal memory controller module is mainly responsible for controlling the flash memory module, including writing/reading of data stream, frame control, etc., but not limited thereto. The peripheral control module is mainly responsible for controlling all peripheral modules, including the starting/closing of peripheral, the control of working mode and the like, but is not limited thereto. The display clock generator module is mainly responsible for time sequence control of all the IP core modules and the physical layer realization modules of the video interface, but is not limited to the time sequence control. The video timing controller module is mainly responsible for processing such as data conversion and timing control when the data input from the video pattern processing module is transmitted to the video interface IP core module, but is not limited to the video timing controller module.
The transmission link (video transmission link) includes: video source (video transmission source), transmission node (embedded physical repeater, cable with active ID, detachable physical repeater, video receiving end, etc.), but is not limited thereto. And the video source changes the transmission node to be changed through changing the frame structure.
Fig. 2 shows a transmission link topology structure diagram of the present disclosure, including a video source, corresponding to a centralized control node. As shown in fig. 2, most transmission link topologies referred to by the present disclosure may include the following four classes: video source→node 1→video device 1, video device 2, and video device 3. Wherein the video apparatus 3 can also be connected directly to the video source. I.e. video source→video apparatus 3. Video source→node 2→video device 4 and video device 5. Video source→node 3→video device 6, video device 7, video device 8, and video device 9. Video source→video device 6. Video source→node 4→node 5→video device 11. The data transmission process involved in this embodiment may send video data to various nodes or video devices for a video source. Each node transmits video data to each video device. Each video device displays video data. In the embodiments of the present disclosure, the video source may transmit video data through the altered frame structure in the embodiments of the present disclosure.
In one embodiment, as shown in fig. 3, a transmission node changing method is provided, and the method is applied to a video source in the video image processing system in fig. 1 for illustration. It will be appreciated that the method may also be applied to video sources in other video image processing systems, where the video source alters a transmission node to be altered by altering a frame structure, the method comprising the steps of:
s202, determining a transmission node to be changed under the condition that transmission conditions or the topology structure of a transmission link are changed.
The transmission conditions may include, among other things, transmission conditions between the video source and each of the transmission nodes, and transmission conditions between the respective transmission nodes. The transmission node in the present embodiment may include: nodes and/or video devices. The change in transmission conditions may include: a change in bit error rate caused by a change in transmission distance; the change in performance parameters of the node and/or video device, such as currently supportable resolution parameters, refresh rate parameters, etc. The topology change in the transmission link may cause the node and/or video device to change topology throughout the transmission link. For example, the topology of the previous video device a was: video source→node a→video device a. The modification is as follows: video source→video device a, whereby it can be determined that the topology of the video device a in the transmission link changes. The change may include an operation of adjusting the resources occupied by the node to be changed, its link topology, or some other state corresponding thereto.
Specifically, in the case where transmission conditions or a topology of a transmission link changes, a transmission node that needs to adjust resources or change the topology of the link is determined. The transmission node may be a transmission node to be changed. The transmission node to be changed can be one or more.
S204, when a change enabling time slot is enabled in a change frame structure, adjusting a transmission link topology of the transmission node to be changed according to a link topology adjustment time slot in the change frame structure, and adjusting resources occupied by the transmission node to be changed through the change frame structure, wherein the change frame structure is obtained by adding a newly enabled time slot to a placement time slot in a standard data frame structure, and the placement time slot comprises: at least one of a pre-allocated slot, a virtual video slot, and a filler video slot in a standard frame.
The change frame structure may be a frame structure for controlling a transmission node to be changed in the embodiment of the present disclosure. It may be a frame structure obtained by placing slots, which may be newly enabled slots, in a standard data frame structure, adding various slots preset to control the transmission node to be changed. The placement time slots may typically be time slots that result from adding newly enabled time slots to the standard data frame structure. Which may generally include at least one of pre-allocated slots, virtual video slots, and filler video slots in a standard frame. The virtual Video slots may typically be Dummy Video in a standard data frame structure. The filler Video slots may typically be Fill Video in a standard data frame structure. The resources occupied by the transmission node to be changed can be the resources in the whole transmission link which the transmission node to be changed needs to occupy after being changed.
Specifically, in the case where the change enable slot is enabled in the change frame structure, it may be determined that the transmission node to be changed is controlled using the change frame structure. And adjusting the transmission link topology of the transmission node to be changed in the whole transmission link according to the link topology adjustment time slot in the frame structure, and transmitting the video data to the transmission node to be changed by changing the frame structure under the condition that the transmission node to be changed needs to receive the video data, so as to finish the transmission of the video data. And the resources occupied by the transmission node to be changed can be adjusted through the change frame structure. The resources occupied by the transmission node to be changed can be increased, reduced or do not occupy any resources, i.e. the transmission node to be changed does not display and occupies resources of 0.
S206, determining a change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure, wherein the change confirmation time slot is fed back by the transmission node to be changed and is used for determining the change result.
The change result may include a result of receiving video data by the transmission node to be changed, a result of changing into which transmission state, a result of resources occupied after the transmission state is adjusted, and the like, and may also include other results fed back by the transmission node to be changed, and in this embodiment, a specific change result type is not limited.
Specifically, when the video source changes the transmission node to be changed through the change frame structure, the transmission node to be changed is changed. Because the transmission node to be changed may not be able to communicate with the video source, the video source cannot determine whether the transmission node to be changed is changed, i.e. cannot obtain a change result. Therefore, the transmission node to be changed can feed back the change confirmation time slot to the video source, and the video source determines the change result of the transmission node to be changed according to the received change confirmation time slot. In this way, whether the transmission node to be changed is completed can be determined.
In the transmission node changing method, the transmission node to be changed is determined under the condition that the transmission condition or the topology structure of the transmission link is changed. The method can only process the transmission node to be changed without changing all the transmission nodes in the transmission link, can improve the processing speed of the system and does not influence other transmission nodes. When a transmission node to be changed needs to be changed, a change frame structure is started, when a change enabling time slot in the change frame structure is started, a time slot is adjusted according to a link topology in the change frame structure, the transmission link topology of the transmission node to be changed is adjusted, resources occupied by the transmission node to be changed are adjusted through the change frame structure, and the change frame structure is obtained by placing a time slot in a standard data frame structure and adding a newly started time slot. Therefore, no extra time slot is occupied, and the overhead of the system can be reduced. And the video source and the transmission node to be changed perform signaling interaction only once through changing the frame structure, namely, the transmission is performed through changing the frame structure. Multiple interactions are not needed, and the overhead of a video image processing system can be reduced.
In one embodiment, as shown in fig. 4, the newly enabled time slot in the modified frame structure includes: change enable slot, link topology adjust slot, change slot, and change acknowledge slot:
the change enabling time slot is used for determining whether to enable the change frame structure;
the link topology adjustment time slot is used for determining whether to adjust the topology structure of the transmission link and determining a topology table, wherein the topology table comprises the connection relation of all transmission nodes in the video transmission link;
the change time slot is used for distributing a change allocation table of the transmission node to be changed, and the change allocation table is used for indicating the resources used by the transmission node to be changed;
and the change confirmation time slot is used for determining a change result of the transmission node to be changed.
As shown in fig. 5, fig. 5 shows a schematic diagram of a standard data frame structure, which may include: BS (Blanking Start), VB-ID (Vertical Blanking Identifier, field Blanking flag), mvid (timer value of Video data), naud (timer value of audio data), dummy Video (for Dummy data padding), BE (Blanking End), pixel data (for transmission of Video data), FS (Fill Start), fill Video (padding data for padding when data is not sufficient), FE (Fill End).
The change frame structure may be a frame structure obtained by adding a change enable slot, a link topology adjustment slot, a change slot, and a change acknowledgement slot to a standard data frame structure.
A change enabled time slot for determining whether to enable a change frame structure, when enabled, may determine to change a transmission node to be changed using the methods of the present disclosure. When the change frame structure is not enabled, then the standard data frame structure will be used for video data transmission.
A link topology adjustment time slot, which may generally include a link topology modification enable field for enabling/disabling adjustment of the transmission link topology; and a link topology adjustment update field, configured to determine a topology table after adjusting the transmission link topology. The topology table refers to all transmission node connection relations in all transmission link topologies determined by the video source; once the video source determines the topology structure of the transmission link, the connection relation of the transmission nodes is determined, and then a topology table can be obtained.
And the change time slot is used for distributing a change distribution table of the transmission node to be changed when the transmission node to be changed is changed. The change allocation table refers to the details of occupation of resources (time slots) allocated by the video source to all transmission nodes in the link topology structure, if the table is not available, the transmission nodes cannot know the resources (time slots) of the transmission nodes, and cannot acquire the data of the transmission nodes from the corresponding pixel data.
And the change confirmation time slot is used for determining a change result of the transmission node to be changed by the video source. When the video source cannot determine the transmission state of the transmission node to be changed, if the transmission node to be changed is closed or data sent by the video source is not received, the video source cannot locate the final change condition of the transmission node to be changed at this time, and the feedback to the video source can only be completed through the time slot.
In this embodiment, the transmission node to be changed may be changed by adding a newly enabled time slot to the standard data frame structure and by the newly enabled time slot. The transmission node to be changed can be changed only by changing the frame structure, so that the overhead of the system is reduced.
In one embodiment, as shown in fig. 6, the process of obtaining the modified frame structure includes:
s302, in the case that the virtual video time slot or the filling video time slot meets the newly enabled time slot, the placing time slot comprises a virtual video time slot or a filling video time slot;
s304, adding a newly started time slot in the virtual video time slot or the filling video time slot to obtain a changed frame structure.
Specifically, in the case that either a virtual video slot or the filler video slot can be placed in a newly enabled slot. The newly enabled time slot may be placed in either the virtual video time slot or the filler video time slot to obtain a modified frame structure. When the newly-started time slot is put into any one of the virtual video time slot or the filling video time slot, the remaining time slots exist in the virtual video time slot or the filling video time slot, and the remaining time slots can be used as the virtual video time slot or the filling video time slot so as to ensure the compatibility with the standard data frame structure. Meanwhile, occupation of single time slots is avoided, effective load is improved, and throughput is further improved.
S306, in the case that the virtual video time slot or the filling video time slot does not meet the newly enabled time slot, the placing time slot comprises a virtual video time slot and a filling video time slot;
s308, adding newly-started time slots into the virtual video time slots and the filling video time slots to obtain a changed frame structure.
Specifically, when neither the virtual video time slot nor the filler video time slot satisfies the newly enabled time slot, the virtual video time slot and the filler video time slot may be combined, and the newly enabled time slot is added in the virtual video time slot and the filler video time slot, to obtain the modified frame structure.
In some exemplary embodiments, change enable slots and link topology adjustment slots may be added to the virtual video slots. The change slots and change acknowledge slots may be added to the filler video slots. It will be appreciated that the above mentioned newly enabled time slots may be added in any combination in the virtual video time slots and the filler video time slots, respectively, in a manner that does not define the combination of newly enabled time slots in this embodiment.
S310, in the case that the virtual video time slot and the filling video time slot do not meet the newly enabled time slot, the placing video time slot comprises a time slot, a virtual video time slot and a filling video time slot which are pre-allocated in a standard data frame;
And S312, adding a newly-started time slot into the pre-allocated time slot, the virtual video time slot and the filling video time slot to obtain a changed frame structure.
Specifically, after the virtual video time slot and the filling video time slot are combined, there is a situation that the newly-started time slot is not added, for example, when any one of the change enabling time slot, the link topology adjustment time slot, the change time slot and the change confirmation time slot is not added into the virtual video time slot and the filling video time slot, a pre-allocated time slot can be set in a standard data frame, and the newly-started time slot which is not added into the virtual video time slot and the filling video time slot is placed in the pre-allocated time slot. The video source can dynamically allocate the newly-started time slot according to the actual situation, and can place the newly-started time slot into the pre-allocated time slot, the virtual video time slot and the filling video time slot. The pre-allocated time slots may include: one or more of the Mvid slots, naud slots, BE slots, pixel data slots, FS slots, etc. in the standard data frame structure.
In this embodiment, when adding a newly enabled slot to a virtual video slot and/or the filler video slot, it may be compatible with a standard frame structure to avoid further handover requests; the switching between the two frame structures does not require excessive signalling interactions. And in order to further satisfy the occupation space of the newly activated time slot, a pre-allocated time slot can be set to satisfy the occupation space requirement of different time slots.
In one embodiment, the adjusting the transmission link topology of the transmission node to be changed according to the link topology adjustment time slot in the change frame structure includes:
and under the condition that the transmission link topology is determined and regulated according to the link topology regulation time slot, determining the connection relation of the transmission node to be changed in the video transmission link, and regulating the transmission link topology of the transmission node to be changed according to the connection relation.
Specifically, after the video source determines the transmission state of the transmission node to be changed, the link topology correction enabling field in the link topology adjustment time slot can be adjusted, so as to adjust the transmission link topology of the transmission node to be changed. The transmission node to be changed can also actively send a request for adjusting the transmission link topology to the video source according to the transmission state of the node to be changed, and the video source adjusts the link topology correction enabling field in the link topology adjustment time slot. Under the condition that the topology of the transmission link needs to be adjusted according to the link topology correction enabling field, the video source determines the connection relation of the transmission node to be changed in the transmission link, and changes the topology structure of the transmission node to be changed in the transmission link according to the connection relation.
In some exemplary embodiments, a transmission node that needs to adjust the link topology may receive the link topology modification enable field in general, and other transmission nodes that do not need to adjust the link topology may simply forward the link topology modification enable field.
In this embodiment, it is possible to determine when the link topology of the transmission node to be changed needs to be adjusted according to the link topology modification enable field. The link topology modification enabling field may be active modification of the video source or signaling sent by the transmission node to be modified to the video source to indicate passive modification of the video source. Adjustment of the link topology can be accomplished according to different requirements.
In one embodiment, as shown in fig. 7, the determining the transmission node to be changed in the case that the transmission condition or the topology structure of the transmission link is changed includes:
s402, determining the transmission state of each transmission node under the condition that the transmission condition or the topology structure of the transmission link is changed;
s404, determining the transmission node to be changed according to the transmission node with the changed transmission state.
In particular, in the case where transmission conditions or the topology of a transmission link are changed, the transmission states of the respective transmission nodes are generally changed. The transmission state changes, and it can be generally determined that the transmission node with the changed transmission state corresponds to the occupied resource, its own topology structure and the like all need to be adjusted, so that the transmission node can be determined as the transmission node to be changed.
Wherein, the transmission state at least comprises:
and the silence state characterizes that the transmission node does not display video data and transmits the video data to other transmission nodes.
Specifically, the silence state may refer to that the transmitting node does not display, but may transmit valid video data to other transmissions; this state can be used when the resources (time slots) in the video data transmission link topology are insufficient, using such transmission nodes as like repeaters to boost the system's payload.
The physical channel changes state, and the representation increases or decreases the number of physical channels used by the transmission node;
in particular, the physical channel change state may refer to increasing and/or decreasing the number of physical channels being used by the current node transmission node to accommodate the performance change of the transmission node.
And the physical channel grouping state is used for representing grouping of physical channels used by the transmission nodes, and the grouped physical channels are respectively used for displaying video data and transmitting other transmission nodes of the video data value.
In particular, the physical channel grouping state may refer to grouping physical channels of the current transmission node for different purposes, i.e., a portion for the current transmission node to display. Another part is used for transmitting the effective video data to other transmission nodes; this state is used for the video source to fully multiplex the physical channel resources to complete the allocation of resources (time slots) without affecting the normal display of such nodes and/or video terminals.
Caching transmission states, representing that the transmission nodes cannot normally display received video data, displaying the video data by using the cached video data, and transmitting the video data to other transmission nodes;
specifically, the buffered transmission state refers to that the current transmission node does not normally display, and uses the video data buffered in the local frame to display, but its current physical channel and resources except those used in the local buffered display are used to transmit the normal video data to other transmission nodes. Reasons for the non-normal display may include: the performance parameters of the current transmission node are not matched with the video data, the corresponding video data cannot be acquired by the resources (time slots) allocated by the video source, the performance of the transmission node is abnormal, and the like. This state is used for the video source to fully multiplex the local frame buffering capability of such transmission nodes to complete the allocation of resources (time slots) without affecting the normal display of such transmission nodes.
And (3) representing the normal display state, wherein the transmission node uses the resources pre-allocated by the video source to normally display video data.
Specifically, the normal display state may refer to that the current transmission node performs normal display using a resource (time slot) pre-allocated by the video source.
And in a dormant state, the physical link representing the transmission node is completely closed.
Specifically, the dormant state refers to that the physical link of the transmission node is completely closed, and the video source considers that the transmission node is not in the current link topology structure, and does not need to allocate resources (time slots); the dormant state is an ideal method for adjusting the transmission link topology of the video source, and the transmission nodes of the nodes can be enabled or disabled in a signaling mode, so that the purpose that the video source flexibly changes the link topology is achieved, and then the current resource (time slot) allocation is flexibly changed.
And in an energy-saving state, the representation transmission node performs normal display according to the lowest performance index, wherein the performance index comprises: resolution, frame rate, number of physical channels, and link rate;
specifically, the energy-saving state refers to that the transmission node completes normal display with the lowest performance index supported by the transmission node, such as resolution, frame rate, physical channel number, link rate and the like, so as to alleviate the power consumption problem of the data transmission link topology; the energy-saving state is a method for flexibly adjusting the current resource (time slot) allocation by a video source, and the resource (time slot) allocation of the transmission node is flexibly changed under the condition of limited influence on the display of the transmission node.
And in the no video state, the transmission node is used for displaying the cached video data in a preset time.
Specifically, the no-video data state refers to that the video source does not allocate resources (time slots) to such transmission nodes within the frame number determined by the video source, and such transmission nodes can complete normal display by using the local frame buffer, but cannot transmit any valid video data to other transmission nodes; the video source temporarily removes the transmission nodes from the current multi-channel video data transmission link topology, but does not affect the normal display of the transmission nodes, so that the video source can simplify the current link topology, and meanwhile, the video source flexibly changes the allocation of resources (time slots).
It will be appreciated that the various transmission states described above are illustrative, and that in practical applications, one skilled in the art may set more transmission states to correspond to the states of different transmission nodes. Each transmission node may typically correspond to only one of the transmission states described above.
In one embodiment, the method further comprises: and in the case that the state of the transmission node is in a dormant state or a video-free state, or in the case that the video source cannot communicate with the transmission node through signaling, communicating with the transmission node through a special sequence field.
In particular, the special sequence field is used for a special means that the video source can complete communication with the transmission nodes in certain specific transmission states, such as a dormant state, a no video state, etc., or a state that the video source cannot complete communication with the nodes and/or the video terminal through normal signaling can all complete communication by using the special sequence field.
In this embodiment, when communication with the transmission node is impossible through normal signaling, communication may be performed through the feature sequence field, so as to complete interaction.
In one embodiment, communication between the video source and the transmitting node may also be interacted with in the form of read-write fields. For example, the video source may interact with the transmission node by means of change signaling, where the change signaling may include: such as the link topology modification enable field described above and the special sequence field described above, as well as the change field and the change acknowledge field.
The change field is used for the video source to allocate resources to the transmission node to be changed when the change of the node to be changed is started; note that this section only works for the transmission node where the resource change occurs, while only forwarding this field is needed for the transmission node where no resource change is needed.
And the change confirmation field is used for determining a change result of the transmission node to be changed. It will be appreciated that the above fields are for illustration only, and that a person skilled in the art may set up various fields for different types of data interactions with the transmission node during the actual application.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the disclosure further provides a transmission node changing device for implementing the above related transmission node changing method. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the one or more transmission node changing devices provided below may refer to the limitation of the transmission node changing method described above, and will not be repeated here.
In one embodiment, as shown in fig. 8, there is provided a transmission node changing apparatus 800 applied to a video source in a video image processing system, the video source changing a transmission node to be changed through a transmission link and a change frame structure, the apparatus comprising: a node to be changed determination module 802, a change module 804, and a feedback module 806, wherein:
the node to be changed determining module 802 is configured to determine a transmission node to be changed under a transmission condition or a topology structure of a transmission link is changed;
a changing module 804, configured to adjust a transmission link topology of the transmission node to be changed according to a link topology adjustment time slot in a changing frame structure when a changing enabling time slot is enabled in the changing frame structure, and send video data to the transmission node to be changed through the changing frame structure, where the changing frame structure is obtained by placing a time slot filling a newly enabled time slot in a standard data frame structure, and the placing time slot includes: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame;
and a feedback module 806, configured to determine a change result of the transmission node to be changed according to a change acknowledgement time slot in the change frame structure, where the change acknowledgement time slot is obtained by feeding back the transmission node to be changed, and is used to determine the change result.
In one embodiment of the apparatus, the newly enabled time slot in the altered frame structure comprises: change enable slot, link topology adjust slot, change slot, and change acknowledge slot:
the change enabling time slot is used for determining whether to enable the change frame structure;
the link topology adjustment time slot is used for determining whether to adjust the topology structure of the transmission link and determining a topology table, wherein the topology table comprises the connection relation of all transmission nodes in the video transmission link;
the change time slot is used for distributing a change allocation table of the transmission node to be changed, and the change allocation table is used for indicating the resources used by the transmission node to be changed;
and the change confirmation time slot is used for determining a change result of the transmission node to be changed.
In one embodiment of the apparatus, the altering module 804 includes: the first adding module is configured to, when the virtual video time slot or the filling video time slot meets the newly enabled time slot, add the newly enabled time slot to the virtual video time slot or the filling video time slot to obtain a modified frame structure, where the placement time slot includes the virtual video time slot or the filling video time slot.
And the second adding module is used for adding the newly-started time slot into the virtual video time slot and the filling video time slot to obtain a changed frame structure when the virtual video time slot or the filling video time slot does not meet the newly-started time slot.
And a third adding module, configured to, when the virtual video time slot and the filling video time slot do not meet the newly enabled time slot, add a newly enabled time slot to the pre-allocated time slot, the virtual video time slot and the filling video time slot to obtain a modified frame structure, where the placed video time slot includes a pre-allocated time slot, a virtual video time slot and a filling video time slot in a standard data frame.
In one embodiment of the apparatus, the altering module 804 further includes: and the link topology adjustment module is used for determining the connection relation of the transmission nodes to be changed in the video transmission link under the condition that the transmission link topology is determined and adjusted according to the link topology adjustment time slot, and adjusting the transmission link topology of the transmission nodes to be changed according to the connection relation.
In one embodiment of the apparatus, the node to be changed determining module 802 includes: and the transmission state determining module is used for determining the transmission state of each transmission node under the condition that the transmission condition or the topology structure of the transmission link is changed.
And the change determining module is used for determining the transmission node to be changed according to the transmission node with the changed transmission state.
In an embodiment of the apparatus, the transmission state comprises at least:
a silence state, which characterizes that the transmission node does not display video data and transmits the video data to other transmission nodes;
the physical channel changes state, and the representation increases or decreases the number of physical channels used by the transmission node;
the physical channel grouping state is used for representing grouping physical channels used by the transmission nodes, and the grouped physical channels are respectively used for displaying video data and transmitting other transmission nodes of the video data value;
caching transmission states, representing that the transmission nodes cannot normally display received video data, displaying the video data by using the cached video data, and transmitting the video data to other transmission nodes;
the normal display state is characterized in that the transmission node uses the resources pre-allocated by the video source to normally display video data;
the dormant state represents that the physical link of the transmission node is completely closed;
and in an energy-saving state, the representation transmission node performs normal display according to the lowest performance index, wherein the performance index comprises: resolution, frame rate, number of physical channels, and link rate;
And in the no video state, the transmission node is used for displaying the cached video data in a preset time.
In one embodiment of the apparatus, the apparatus further comprises: and the special communication module is used for communicating with the transmission node through a special sequence field under the condition that the state of the transmission node is in a dormant state or a video-free state or the video source cannot communicate with the transmission node through signaling.
The respective modules in the transmission node changing apparatus described above may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a server, and the internal structure of which may be as shown in fig. 9. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used to store video data that the video source needs to transmit. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a transmission node change method.
It will be appreciated by those skilled in the art that the structure shown in fig. 9 is merely a block diagram of a portion of the structure associated with the disclosed aspects and is not limiting of the computer device to which the disclosed aspects apply, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the method embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided by the present disclosure may include at least one of non-volatile and volatile memory, among others. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided by the present disclosure may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors involved in the embodiments provided by the present disclosure may be general-purpose processors, central processing units, graphics processors, digital signal processors, programmable logic, quantum computing-based data processing logic, etc., without limitation thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples have expressed only a few embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the present disclosure. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of the present disclosure should be determined from the following claims.
Claims (10)
1. A transmission node changing method, which is applied to a video source in a video image processing system, wherein the video source changes a transmission node to be changed through a change frame structure, and the method comprises the following steps:
under the condition that transmission conditions or the topology structure of a transmission link is changed, determining a transmission node to be changed;
under the condition that a change enabling time slot in a change frame structure is enabled, according to a link topology adjustment time slot in the change frame structure, adjusting the transmission link topology of the transmission node to be changed, and adjusting resources occupied by the transmission node to be changed through the change frame structure, wherein the change frame structure is obtained by adding a newly enabled time slot into a placement time slot in a standard data frame structure, and the placement time slot comprises: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame;
And determining a change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure, wherein the change confirmation time slot is fed back by the transmission node to be changed and is used for determining the change result.
2. The method of claim 1, wherein the altering the newly enabled time slots in the frame structure comprises: change enable slot, link topology adjust slot, change slot, and change acknowledge slot:
the change enabling time slot is used for determining whether to enable the change frame structure;
the link topology adjustment time slot is used for determining whether to adjust the topology structure of the transmission link and determining a topology table, wherein the topology table comprises the connection relation of all transmission nodes in the transmission link;
the change time slot is used for distributing a change allocation table of the transmission node to be changed, and the change allocation table is used for indicating the resources used by the transmission node to be changed;
and the change confirmation time slot is used for determining a change result of the transmission node to be changed.
3. The method of claim 1, wherein the process of altering the frame structure comprises:
under the condition that the virtual video time slot or the filling video time slot meets the newly-started time slot, the placing time slot comprises the virtual video time slot or the filling video time slot, and the newly-started time slot is added in the virtual video time slot or the filling video time slot to obtain a changed frame structure;
Under the condition that the virtual video time slot or the filling video time slot does not meet the newly-started time slot, the placing time slot comprises a virtual video time slot and a filling video time slot, and newly-started time slots are added into the virtual video time slot and the filling video time slot to obtain a changed frame structure;
and under the condition that the virtual video time slot and the filling video time slot do not meet the newly started time slot, the placing time slot comprises a pre-allocated time slot, a virtual video time slot and a filling video time slot in a standard data frame, and the newly started time slot is added in the pre-allocated time slot, the virtual video time slot and the filling video time slot to obtain a changed frame structure.
4. The method according to claim 2, wherein said adjusting the transmission link topology of the transmission node to be changed according to the link topology adjustment time slot in the change frame structure comprises:
and under the condition that the transmission link topology is determined and regulated according to the link topology regulation time slot, determining the connection relation of the transmission node to be changed in the video transmission link, and regulating the transmission link topology of the transmission node to be changed according to the connection relation.
5. The method according to claim 1, wherein the determining the transmission node to be changed in case of a change in transmission conditions or topology of the transmission link comprises:
Under the condition that transmission conditions or the topology structure of a transmission link is changed, determining the transmission state of each transmission node;
and determining the transmission node to be changed according to the transmission node with the changed transmission state.
6. The method of claim 5, wherein the transmission state comprises at least:
a silence state, which characterizes that the transmission node does not display video data and transmits the video data to other transmission nodes;
the physical channel changes state, and the representation increases or decreases the number of physical channels used by the transmission node;
the physical channel grouping state is used for representing grouping physical channels used by the transmission nodes, and the grouped physical channels are respectively used for displaying video data and transmitting other transmission nodes of the video data value;
caching transmission states, representing that the transmission nodes cannot normally display received video data, displaying the video data by using the cached video data, and transmitting the video data to other transmission nodes;
the normal display state is characterized in that the transmission node uses the resources pre-allocated by the video source to normally display video data;
the dormant state represents that the physical link of the transmission node is completely closed;
and in an energy-saving state, the representation transmission node performs normal display according to the lowest performance index, wherein the performance index comprises: resolution, frame rate, number of physical channels, and link rate;
And in the no video state, the transmission node is used for displaying the cached video data in a preset time.
7. The method of claim 6, wherein the method further comprises: and in the case that the state of the transmission node is in a dormant state or a video-free state, or in the case that the video source cannot communicate with the transmission node through signaling, communicating with the transmission node through a special sequence field.
8. A transmission node changing apparatus, applied to a video source in a video image processing system, the video source changing a transmission node to be changed through a transmission link and a change frame structure, the apparatus comprising:
the node to be changed determining module is used for determining the transmission node to be changed under the condition that the transmission condition or the topology structure of the transmission link is changed;
a changing module, configured to adjust a transmission link topology of the transmission node to be changed according to a link topology adjustment time slot in a changing frame structure when a changing enabling time slot is enabled in the changing frame structure, and send video data to the transmission node to be changed through the changing frame structure, where the changing frame structure is obtained by placing a time slot filling a newly enabled time slot in a standard data frame structure, and the placing time slot includes: at least one of a pre-allocated time slot, a virtual video time slot and a filler video time slot in a standard frame;
And the feedback module is used for determining the change result of the transmission node to be changed according to the change confirmation time slot in the change frame structure, wherein the change confirmation time slot is obtained by feeding back the transmission node to be changed and is used for determining the change result.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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