CN106604097A - Method and system for transmitting multipath video signals - Google Patents
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
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Abstract
本发明涉及一种多路视频信号的传输方法和系统。上述多路视频信号的传输方法，包括如下步骤：分别对各路待传输的视频信号进行数字化处理，得到多路数字视频数据；获取各路数字视频数据的帧数比；根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号；将所述合成视频信号传输至解码单元，在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据；分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口；其有效降低了智能显示设备同时传输多路视频信号的成本。
The invention relates to a transmission method and system for multi-channel video signals. The transmission method of the above-mentioned multi-channel video signal comprises the steps of: digitally processing each video signal to be transmitted respectively to obtain multi-channel digital video data; obtaining the frame number ratio of each channel digital video data; according to the frame number ratio Alternately sample frame data from each road digital video data to fill the time slots of the transmission link to obtain a composite video signal corresponding to each road digital video data; transmit the composite video signal to a decoding unit, and synthesize video in the decoding unit The signal is decomplexed, and the composite video signal is decomposed into various digital video data; each digital video data is sent to the display window corresponding to each digital video data in the display interface; it effectively reduces the simultaneous The cost of transmitting multiple video signals.
Description
技术领域technical field
本发明涉及视频信号处理技术领域，特别是涉及一种多路视频信号的传输方法和系统。The present invention relates to the technical field of video signal processing, in particular to a method and system for transmitting multi-channel video signals.
背景技术Background technique
智能显示设备，尤其是多屏显示设备通常具有视频信号的回显功能和与预览功能等多种信号显示的功能；即智能显示设备的处理器(如Ark5000等)可以控制某个信号在其显示界面进行预览，控制某信号在相应的显示界面进行回显，上述处理器还可以控制其他信号在该显示界面进行其他显示工作。由于智能显示设备的处理器每套流媒体设备(受限显卡线路数量)通常只传输一路视频码流，这种情况下，上述智能显示设备便难以在其显示界面同时分别针对多路视频信号进行相应的显示(比如实现不同视频信号的回显和预览等)；例如，Ark5000虽然有回显和模式预览两个功能，但受限硬件设备限制，Ark5000处理器同一时间只能输出回显视频信号或者预览视频信号至相应的显示，这样会导致如果A用户正在观看桌面回显，此时B用户向处理器请求模式预览，会导致A用户视频流错乱。Smart display devices, especially multi-screen display devices, usually have video signal echo function and multiple signal display functions such as preview function; that is, the processor of the smart display device (such as Ark5000, etc.) can control a certain signal on its display The interface is previewed, and a certain signal is controlled to be echoed on the corresponding display interface. The processor can also control other signals to perform other display work on the display interface. Since the processor of the smart display device usually only transmits one video code stream per set of streaming media devices (limited number of graphics card lines), in this case, it is difficult for the above-mentioned smart display device to perform multi-channel video signals on its display interface at the same time. Corresponding display (such as realizing echo and preview of different video signals, etc.); for example, although Ark5000 has two functions of echo and mode preview, but limited by hardware devices, the Ark5000 processor can only output echo video signals at the same time Or preview the video signal to the corresponding display, which will cause if user A is watching the desktop echo, and user B requests a mode preview from the processor at this time, which will cause the video stream of user A to be disordered.
传统方案在智能设备的处理器增设流媒体设备(例如增加处理器显卡数量)，通过多个流媒体设备在同一时间实现多路视频信号的传输，进而使相应的智能处理设备可以同时对不同视频信号进行多种显示，然而智能显示设备的流媒体设备造价昂贵，使利用多个流媒体设备在同一时间实现多路视频信号的传输方案成本高。The traditional solution is to add a streaming media device to the processor of the smart device (such as increasing the number of processor graphics cards), and realize the transmission of multiple video signals at the same time through multiple streaming media devices, so that the corresponding intelligent processing device can simultaneously process different video signals. The signal can be displayed in multiple ways, but the streaming media equipment of the intelligent display device is expensive, which makes the transmission scheme of using multiple streaming media devices to realize the transmission of multiple video signals at the same time costly.
发明内容Contents of the invention
基于此，有必要针对传统方案利用多个流媒体设备在同一时间实现多路视频信号的传输方案成本高的技术问题，提供一种多路视频信号的传输方法和系统。Based on this, it is necessary to provide a multi-channel video signal transmission method and system to address the technical problem of high cost in the traditional solution of using multiple streaming media devices to realize the transmission of multiple video signals at the same time.
一种多路视频信号的传输方法，包括如下步骤：A method for transmitting multiplexed video signals, comprising the steps of:
分别对各路待传输的视频信号进行数字化处理，得到多路数字视频数据；Digitally process each video signal to be transmitted to obtain multiple channels of digital video data;
获取各路数字视频数据的帧数比；Obtain the frame number ratio of each channel of digital video data;
根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号；Alternately sampling frame data from each channel of digital video data to fill the time slots of the transmission link according to the frame number ratio, to obtain a synthetic video signal corresponding to each channel of digital video data;
将所述合成视频信号传输至解码单元，在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据；The composite video signal is transmitted to a decoding unit, and the composite video signal is decomplexed in the decoding unit, and the composite video signal is decomposed into various digital video data;
分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口。Sending each channel of digital video data to a display window corresponding to each channel of digital video data in the display interface.
一种多路视频信号的传输系统，包括：A transmission system for multiple video signals, comprising:
数字化处理模块，用于分别对各路待传输的视频信号进行数字化处理，得到多路数字视频数据；The digital processing module is used to digitally process each video signal to be transmitted respectively to obtain multi-channel digital video data;
获取模块，用于获取各路数字视频数据的帧数比；An acquisition module, configured to acquire the frame number ratio of each channel of digital video data;
填充模块，用于根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号；A filling module, used to alternately sample frame data from each channel of digital video data to fill the time slots of the transmission link according to the frame number ratio, to obtain a composite video signal corresponding to each channel of digital video data;
分解模块，用于将所述合成视频信号传输至解码单元，在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据；A decomposition module, configured to transmit the composite video signal to a decoding unit, perform demultiplexing processing on the composite video signal in the decoding unit, and decompose the composite video signal into various digital video data;
发送模块，用于分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口。The sending module is used to send each channel of digital video data to the display window corresponding to each channel of digital video data in the display interface.
上述多路视频信号的传输方法和系统，可以将视频信号转换为相应的数字视频数据，根据各路数字视频数据之间的帧数比交替从数字视频数据中采样帧数据填充传输链路的时隙，使各路数字视频数据合并为一路合成视频信号，再将该路合成视频信号通过智能显示设备中有限的流媒体设备传输至解码单元，这样，上述合成视频信号可以在所述解码单元解复为相应的数字视频数据，从而实现上述多路数字视频数据同时在智能显示设备中有限的流媒体设备上的传输，有效降低了智能显示设备同时传输多路视频信号的成本。The above method and system for transmitting multi-channel video signals can convert video signals into corresponding digital video data, and alternately sample frame data from digital video data to fill the transmission link according to the frame number ratio between digital video data of various channels. gap, so that the digital video data of each channel is combined into one composite video signal, and then the composite video signal is transmitted to the decoding unit through the limited streaming media device in the intelligent display device, so that the above composite video signal can be decoded in the decoding unit complex to corresponding digital video data, so as to realize the simultaneous transmission of the above-mentioned multi-channel digital video data on the limited streaming media devices in the smart display device, effectively reducing the cost of simultaneous transmission of multiple video signals by the smart display device.
附图说明Description of drawings
图1为一个实施例的多路视频信号的传输方法流程图；Fig. 1 is a flow chart of a transmission method of a multi-channel video signal of an embodiment;
图2为一个实施例的帧数据的交替采样和解复处理示意图；Fig. 2 is a schematic diagram of alternate sampling and demultiplexing of frame data in an embodiment;
图3为一个实施例的帧数据的交替采样和解复处理示意图；Fig. 3 is a schematic diagram of alternate sampling and demultiplexing of frame data in an embodiment;
图4为一个实施例的多路视频信号的传输系统结构示意图。FIG. 4 is a schematic structural diagram of a transmission system for multiple video signals according to an embodiment.
具体实施方式detailed description
下面结合附图对本发明的多路视频信号的传输方法和系统的具体实施方式作详细描述。The specific implementation manners of the multi-channel video signal transmission method and system of the present invention will be described in detail below with reference to the accompanying drawings.
参考图1，图1所示为一个实施例的多路视频信号的传输方法流程图，包括如下步骤：With reference to Fig. 1, Fig. 1 shows the flow chart of the transmission method of the multi-channel video signal of an embodiment, comprises the following steps:
S10，分别对各路待传输的视频信号进行数字化处理，得到多路数字视频数据；S10, respectively digitally processing each channel of video signals to be transmitted to obtain multiple channels of digital video data;
上述视频信号可以包括用户向智能显示设备输入某一显示指令，上述智能显示设备根据用户输入的显示指令所生成的待显示的视频信号(如待预览的视频信号或者带回显得视频信号等)，还可以包括用户通过外部存储设备向上述智能显示设备输入的视频信号等。上述步骤可以对各路视频信号中的亮度信号(Y)、红色差信号(R-Y)和蓝色差信号(B-Y)等信号分量分别进行数字化处理，以得到相应视频信号对应的数字视频数据。The above-mentioned video signal may include the user inputting a certain display instruction to the smart display device, and the above-mentioned smart display device generates a video signal to be displayed according to the display instruction input by the user (such as a video signal to be previewed or a video signal brought back to display, etc.), It may also include video signals input by the user to the above-mentioned smart display device through an external storage device. The above steps can digitize signal components such as the luminance signal (Y), the red difference signal (R-Y) and the blue difference signal (B-Y) in each channel of video signals to obtain digital video data corresponding to the corresponding video signals.
S20，获取各路数字视频数据的帧数比；S20, acquiring the frame number ratio of each channel of digital video data;
上述步骤可以通过获取各路数字视频数据分别包括多少帧帧数据(图像帧数据)，根据各路数字视频数据所含帧数据的帧数，计算各路数字视频数据的帧数比。若上述数字视频数据为2路，各路数字视频数据所含帧数据的帧数相等，则各路数字视频数据的帧数比为1:1；若上述数字视频数据为2路，第一路数字视频数据所含帧数据的帧数是第二路数字视频数据所含帧数据的帧数的2倍，则各路数字视频数据的帧数比为2:1。The above steps can calculate the frame number ratio of each channel of digital video data according to the number of frames of frame data contained in each channel of digital video data by acquiring how many frames of data (image frame data) each channel of digital video data respectively includes. If the above-mentioned digital video data is 2 channels, and the frame numbers of frame data contained in each channel digital video data are equal, then the frame number ratio of each channel digital video data is 1:1; if the above-mentioned digital video data is 2 channels, the first channel The frame number of the frame data contained in the digital video data is twice the frame number of the frame data contained in the second channel of digital video data, so the frame number ratio of each channel of digital video data is 2:1.
S30，根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号；S30, alternately sampling frame data from each channel of digital video data to fill time slots of the transmission link according to the frame number ratio, to obtain a composite video signal corresponding to each channel of digital video data;
上述步骤中，一次从数字视频数据中采样一帧帧数据填充传输链路的一个时隙。对于一路数字视频数据而言，可以根据各帧帧数据在上述数字视频数据中的时钟顺序进行采集，例如，若需要采样第一路数字视频数据中的帧数据，则先采样其第一帧帧数据，之后对该路数字视频数据的采样过程中，按照相应的时钟顺序，依次采样其中的第二帧帧数据、第三帧帧数据等等。In the above steps, one frame of frame data is sampled from the digital video data at a time to fill one time slot of the transmission link. For one channel of digital video data, it can be collected according to the clock sequence of each frame data in the above digital video data. For example, if the frame data in the first channel of digital video data needs to be sampled, the first frame of the frame is first sampled. Afterwards, during the sampling process of the channel of digital video data, the second frame frame data, the third frame frame data and so on are sequentially sampled according to the corresponding clock sequence.
上述步骤还需要根据各路数字视频数据的帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙。如图2所示，图2示出了3路数字视频数据：数字视频数据A(A1A2A3…)，数字视频数据B(B1B2B3…)，数字视频数据C(C1C2C3…)，各路数字视频数据分别所含帧数据的帧数相等，相应的帧数比为1:1:1，在交替从各路数字视频数据中采样帧数据填充传输链路的时隙的过程中，可以分别采样获取各路数字视频数据中的第一帧帧数据以填充相应的时隙，再对各路数字视频数据中的第二帧帧数据进行采样以及填充，以此循环，直至各路数字视频数据中的所有帧数据全部填入传输链路的时隙；如图2所示，可以先从数字视频数据A中采样第一帧帧数据A1填充传输链路的第一个时隙，从数字视频数据B中采样第一帧帧数据B1填充传输链路的第二个时隙，从数字视频数据C中采样第一帧帧数据C1填充传输链路的第三个时隙，再对各路数字视频数据中的第二帧帧数据进行采样(依次从数字视频数据A、数字视频数据B和数字视频数据C中采用第二帧数据A2、B2和C2)以及填充，以此循环，直至3路数字视频数据中的所有帧数据全部填入传输链路的时隙，得到合成视频信号A1B1C1A2B2C2…。图3示出了2路数字视频数据：数字视频数据D(D1D2D3D4)和数字视频数据E(E1E2)，其中，数字视频数据D包括4帧帧数据D1、D2、D3和D4，数字视频数据E包括2帧帧数据E1和E2，数字视频数据D和数字视频数据E的帧数比为2:1，在交替从各路数字视频数据中采样帧数据填充传输链路的时隙的过程中，可以先从数字视频数据D中采样第一帧帧数据A1填充传输链路的第一个时隙，从数字视频数据D中采样第二帧帧数据D2填充传输链路的第二个时隙，再数字视频数据E中采样第一帧帧数据E1填充传输链路的第三个时隙，完成对上述数字视频数据D和数字视频数据E的第一轮采样，再开始对上述数字视频数据D和数字视频数据E进行下一轮采用(先从数字视频数据D种采样两帧帧数据，再从数字视频数据E中采样第一帧帧数据)，以此循环，直至数字视频数据D和数字视频数据E中的所有帧数据全部填入传输链路的时隙，得到合成视频信号D1D2E1D3D4E2。The above steps also need to alternately sample frame data from each channel of digital video data to fill the time slots of the transmission link according to the frame number ratio of each channel of digital video data. As shown in Figure 2, Figure 2 shows 3 channels of digital video data: digital video data A (A1A2A3...), digital video data B (B1B2B3...), digital video data C (C1C2C3...), each channel of digital video data is The frame numbers of the contained frame data are equal, and the corresponding frame number ratio is 1:1:1. In the process of alternately sampling frame data from each channel of digital video data to fill the time slots of the transmission link, each channel can be sampled and obtained separately. The first frame frame data in the digital video data is used to fill the corresponding time slot, and then the second frame frame data in each channel of digital video data is sampled and filled, and the cycle is repeated until all frames in each channel of digital video data All the data is filled in the time slot of the transmission link; as shown in Figure 2, the first frame data A1 can be sampled from the digital video data A to fill the first time slot of the transmission link, and the first frame data A1 can be sampled from the digital video data B The first frame frame data B1 fills the second time slot of the transmission link, samples the first frame frame data C1 from the digital video data C and fills the third time slot of the transmission link, and then the digital video data of each path The second frame frame data is sampled (successively adopts the second frame data A2, B2 and C2 from digital video data A, digital video data B and digital video data C) and filling, and thus circulates until the 3-way digital video data All the frame data of all are filled into the time slots of the transmission link to obtain the composite video signal A1B1C1A2B2C2.... Fig. 3 shows 2 road digital video data: digital video data D (D1D2D3D4) and digital video data E (E1E2), wherein, digital video data D comprises 4 frame data D1, D2, D3 and D4, digital video data E Including 2 frames of frame data E1 and E2, the frame number ratio of digital video data D and digital video data E is 2:1, during the process of alternately sampling frame data from various digital video data to fill the time slots of the transmission link, The first frame data A1 can be sampled from the digital video data D to fill the first time slot of the transmission link, and the second frame frame data D2 can be sampled from the digital video data D to fill the second time slot of the transmission link. Sampling the first frame frame data E1 in the digital video data E fills the third time slot of the transmission link, completes the first round of sampling of the above-mentioned digital video data D and digital video data E, and then starts to the above-mentioned digital video data D Carry out the next round of adoption with digital video data E (first sample two frames of frame data from digital video data D, then sample the first frame of frame data from digital video data E), and cycle like this until digital video data D and digital All the frame data in the video data E are filled into the time slots of the transmission link to obtain the synthesized video signal D1D2E1D3D4E2.
S40，将所述合成视频信号传输至解码单元，在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据；S40, transmit the composite video signal to a decoding unit, perform demultiplexing processing on the composite video signal in the decoding unit, and decompose the composite video signal into various channels of digital video data;
上述步骤将所述合成视频信号传输至解码单元，通过传输一路合成视频信号，实现了其对应的多路数字视频数据的传输，在将上述合成视频信号传输至解码单元后，可以在解码单元对合成视频信号进行解复处理，得到各路数字视频数据。如图2所示，对合成视频信号A1B1C1A2B2C2…进行解复处理，便可以得到其对应的3路数字视频数据：数字视频数据A(A1A2A3…)，数字视频数据B(B1B2B3…)，数字视频数据C(C1C2C3…)，以便将上述3路数字视频数据：数字视频数据A，数字视频数据B和数字视频数据C分别发送至显示界面实现相应的显示。如图3所示，对合成视频信号D1D2E1D3D4E2进行解复处理，便可以得到其对应的2路数字视频数据：数字视频数据D(D1D2D3D4)和数字视频数据E(E1E2)，再对上述数字视频数据D(D1D2D3D4)和数字视频数据E(E1E2)进行后续的传输和处理。The above steps transmit the composite video signal to the decoding unit, and realize the transmission of its corresponding multi-channel digital video data by transmitting one composite video signal. After the above composite video signal is transmitted to the decoding unit, the decoding unit can The synthesized video signal is demultiplexed to obtain digital video data of various channels. As shown in Figure 2, by demultiplexing the composite video signal A1B1C1A2B2C2..., the corresponding three channels of digital video data can be obtained: digital video data A (A1A2A3...), digital video data B (B1B2B3...), digital video data C(C1C2C3...), so as to send the above three channels of digital video data: digital video data A, digital video data B and digital video data C to the display interface for corresponding display. As shown in Figure 3, the composite video signal D1D2E1D3D4E2 is demultiplexed to obtain its corresponding 2-way digital video data: digital video data D (D1D2D3D4) and digital video data E (E1E2), and then the above digital video data D(D1D2D3D4) and digital video data E(E1E2) are subsequently transmitted and processed.
S50，分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口。S50. Send each channel of digital video data to a display window corresponding to each channel of digital video data in the display interface.
本发明提供的多路视频信号的传输方法，可以将视频信号转换为相应的数字视频数据，根据各路数字视频数据之间的帧数比交替从数字视频数据中采样帧数据填充传输链路的时隙，使各路数字视频数据合并为一路合成视频信号，再将该路合成视频信号通过智能显示设备中有限的流媒体设备传输至解码单元，这样，上述合成视频信号可以在所述解码单元解复为相应的数字视频数据，从而实现上述多路数字视频数据同时在智能显示设备中有限的流媒体设备上的传输，有效降低了智能显示设备同时传输多路视频信号的成本。The multi-channel video signal transmission method provided by the present invention can convert the video signal into corresponding digital video data, and alternately sample frame data from the digital video data to fill the transmission link according to the frame number ratio between the digital video data of each channel. Time slots, so that each channel of digital video data is merged into a composite video signal, and then the composite video signal is transmitted to the decoding unit through the limited streaming media equipment in the intelligent display device, so that the above composite video signal can be displayed in the decoding unit Decomplexing into corresponding digital video data, so as to realize the simultaneous transmission of the above-mentioned multi-channel digital video data on the limited streaming media devices in the intelligent display device, effectively reducing the cost of simultaneous transmission of multiple video signals by the intelligent display device.
在一个实施例中，上述根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号的过程可以包括：In one embodiment, the above-mentioned process of alternately sampling frame data from each channel of digital video data to fill the time slots of the transmission link according to the frame number ratio to obtain a composite video signal corresponding to each channel of digital video data may include:
根据所述帧数比设置各路数字视频数据的采集顺序；其中，一轮采集中对各路数字视频数据的采集次数之比等于所述帧数比；According to the frame number ratio, the collection order of each channel digital video data is set; wherein, the ratio of the number of acquisition times of each channel digital video data in one round of collection is equal to the frame number ratio;
按照所述采集顺序依次从各路数字视频数据中采集帧数据填入传输链路的时隙；其中，一次采集数字视频数据中的一帧帧数据，所述数字视频数据中的各帧数据按照其在该数字视频数据中的时间顺序被采集；Acquire frame data from each channel of digital video data sequentially according to the acquisition order and fill in the time slot of the transmission link; its temporal sequence in the digital video data is captured;
在按照所述采集顺序在各路数字视频数据中采集完一轮帧数据后，重复执行按照所述采集顺序依次从各路数字视频数据中采集帧数据填入传输链路的时隙的过程，直至各路数字视频数据中的所有帧数据全部填入传输链路的时隙。After collecting a round of frame data in each channel of digital video data according to the acquisition sequence, repeat the process of sequentially collecting frame data from each channel of digital video data in accordance with the acquisition sequence to fill in the time slot of the transmission link, Until all the frame data in each channel of digital video data are completely filled into the time slots of the transmission link.
本实施例中，对各路数字视频数据的一轮帧数据采集需要对各路数字视频数据的帧数据进行采集，如分别采集各路数字视频数据的一帧帧数据，或者先采集第一路数字视频数据的几帧帧数据，再分别采集其他各路数字视频数据的一帧帧数据等等。在对各路数字视频数据的任一轮采集过程中，对各路数字视频数据的采集次数之比等于所述帧数比。In this embodiment, a round of frame data collection of digital video data from various channels needs to collect frame data of digital video data from various channels, such as collecting one frame data of digital video data from various channels respectively, or collecting the first channel of digital video data first Several frames of digital video data, and then collect one frame of other digital video data and so on. During any round of acquisition of digital video data from various channels, the ratio of the acquisition times of digital video data from various channels is equal to the frame number ratio.
在一个实施例中，上述根据所述帧数比和传输帧率交替从各路数字视频数据中采样帧数据填充传输链路的时隙的过程可以包括：In one embodiment, the above-mentioned process of alternately sampling frame data from various channels of digital video data according to the frame number ratio and the transmission frame rate to fill the time slots of the transmission link may include:
若各路数字视频数据的帧数相等，则设置各路数字视频数据的采集顺序；If the number of frames of the digital video data of each path is equal, the acquisition order of the digital video data of each path is set;
按照所述采集顺序采集各路数字视频数据的第一帧帧数据依次填入传输链路的时隙；Collect the first frame frame data of each digital video data according to the collection order and fill in the time slots of the transmission link in turn;
在采集完各路数字视频数据的第一帧帧数据后，再按照所述采集顺序分别在各路数字视频数据中采集下一帧帧数据依次填入传输链路的时隙；After collecting the first frame frame data of each road digital video data, collect the next frame frame data respectively in each road digital video data according to the collection sequence and fill in the time slots of the transmission link in turn;
重复执行按照所述采集顺序分别在各路数字视频数据中采集下一帧帧数据依次填入传输链路的时隙的过程，直至各路数字视频数据中的所有帧数据全部填入传输链路的时隙。Repeat the process of collecting the next frame of frame data in each channel of digital video data according to the acquisition sequence and filling in the time slots of the transmission link in turn, until all frame data in each channel of digital video data are completely filled in the transmission link time slot.
本实施例可以保证从各路数字视频数据中采样帧数据填充传输链路的时隙这一过程中的有序性，以提高所生成的合成视频信号的准确性。This embodiment can ensure the orderliness in the process of filling the time slots of the transmission link with sampled frame data from various channels of digital video data, so as to improve the accuracy of the generated synthetic video signal.
在一个实施例中，上述根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号的步骤之前还可以包括：In one embodiment, before the step of obtaining the synthetic video signal corresponding to each channel of digital video data by alternately sampling frame data from each channel of digital video data to fill the time slot of the transmission link according to the frame number ratio may further include:
设置各路数字视频数据中任意一帧帧数据的类型标签；其中，所述类型标签记录所述帧数据所对应的数字视频数据的类型；上述类型标签与数字视频数据一一对应，任一路数字视频数据具有唯一对应的类型标签；Set the type label of any frame data in each digital video data; wherein, the type label records the type of digital video data corresponding to the frame data; the type label corresponds to the digital video data one by one, any digital video Video data has a unique corresponding type label;
所述在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据的过程包括：The process of decomplexing the composite video signal in the decoding unit and decomposing the composite video signal into digital video data of various channels includes:
在所述解码单元对合成视频信号进行解复处理，得到所述合成视频信号包括的各帧帧数据；Decomplexing the composite video signal in the decoding unit to obtain frame data of each frame included in the composite video signal;
分别识别各帧帧数据的类型标签，将类型标签相同的帧数据合成一路数字视频数据。The type tags of the frame data of each frame are identified respectively, and the frame data with the same type tag are synthesized into one channel of digital video data.
本实施例将类型标签相同的帧数据合成该类型标签对应的数字视频数据，保证了所得到的数字视频数据的准确性。In this embodiment, frame data with the same type tag is synthesized into digital video data corresponding to the type tag, thereby ensuring the accuracy of the obtained digital video data.
作为一个实施例，上述帧数据可以携带时钟标签；任意一路数字视频数据中，所述时钟标签的时钟顺序与各帧帧数据在相应数字视频数据中的排列顺序一致。As an embodiment, the above frame data may carry a clock tag; in any channel of digital video data, the clock sequence of the clock tag is consistent with the arrangement sequence of each frame of frame data in the corresponding digital video data.
上述时钟标签可以表征其对应的帧数据在相应数字视频数据中的时钟顺序。The aforementioned clock tag can represent the clock sequence of its corresponding frame data in the corresponding digital video data.
作为一个实施例，上述将类型标签相同的帧数据合成一路数字视频数据的过程可以包括：As an embodiment, the above-mentioned process of synthesizing frame data with the same type tag into one channel of digital video data may include:
分别识别各个类型标签相同的帧数据携带的时钟标签；Respectively identify the clock tags carried by the frame data with the same type of tags;
按照所述时钟标签中的时钟顺序，将所述类型标签相同的帧数据合成一路数字视频数据。According to the clock sequence in the clock tag, the frame data of the same type tag are synthesized into one channel of digital video data.
本实施例按照所述时钟标签中的时钟顺序进行相应数字视频数据的合成，使所合成的数字视频数据中，各帧帧数据在上述数字视频数据中的排列顺序与相应原始视频信号中各帧信号的顺序一致。In this embodiment, the corresponding digital video data is synthesized according to the clock sequence in the clock label, so that in the synthesized digital video data, the arrangement order of each frame frame data in the above-mentioned digital video data is the same as that of each frame in the corresponding original video signal. The order of the signals is consistent.
在一个实施例中，上述分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口的过程可以包括：In one embodiment, the process of sending each channel of digital video data to the display window corresponding to each channel of digital video data in the display interface may include:
在显示界面分别创建各路数字视频数据对应的显示窗口；Create display windows corresponding to each channel of digital video data on the display interface;
分别将各路数字视频数据发送至相应的显示窗口进行显示。The digital video data of each channel are respectively sent to corresponding display windows for display.
本实施例可以实现各路数字视频数据在相应显示界面的显示，具有较低的成本。This embodiment can realize the display of various channels of digital video data on the corresponding display interface, and has a relatively low cost.
在一个实施例中，上述视频信号包括回显视频信号和预览视频信号；其中，所述回显视频信号为处理器根据回显指令生成的用于在显示界面进行回显的视频内容；所述预览视频信号为处理器根据预览指令生成的用于在显示界面进行预览的视频内容。In one embodiment, the above-mentioned video signal includes an echo video signal and a preview video signal; wherein, the echo video signal is the video content generated by the processor according to the echo command for echoing on the display interface; the The preview video signal is the video content generated by the processor according to the preview instruction for previewing on the display interface.
本实施例使智能显示设备在不增设流媒体设备时，可以同时实现不同信号的预览和回显，有效降低了智能显示设备同时实现预览和回显这两个显示功能的成本。In this embodiment, the intelligent display device can simultaneously realize the preview and echo of different signals without adding a streaming media device, which effectively reduces the cost of the intelligent display device for realizing the two display functions of preview and echo at the same time.
在一个实施例中，上述分别对各路待传输的视频信号进行数字化处理的过程包括：In one embodiment, the above-mentioned process of digitally processing each video signal to be transmitted includes:
分别对任一路视频信号中的亮度信号、红色差信号和蓝色差信号进行数字化处理，根据数字化处理后的亮度信号、红色差信号和蓝色差信号生成该路视频信号对应的数字视频数据。The luminance signal, red difference signal and blue difference signal in any video signal are digitally processed respectively, and digital video data corresponding to the video signal is generated according to the digitally processed luminance signal, red difference signal and blue difference signal.
本实施例提供的数字化处理过程，可以准确对各路视频信号进行较为完整的数字化处理。The digital processing process provided by this embodiment can accurately perform relatively complete digital processing on each channel of video signals.
在一个实施例中，以Ark5000处理器中的彩色全电视信号为例，可以先对彩色全电视信号中的亮度信号(Y)、红色差信号(R-Y)和蓝色差信号(B-Y)分别进行数字化，然后利用时分复用制(通过一定方式将这三个分别数字化的信号复用起来)进行分量数字化，对亮度信号和两个色差信号分别进行数字化，然后将已经数字化的高度和色差信号编排成一个码流。In one embodiment, taking the color full TV signal in the Ark5000 processor as an example, the luminance signal (Y), the red difference signal (R-Y) and the blue difference signal (B-Y) in the color full TV signal can be digitized respectively , and then use the time division multiplexing system (by multiplexing the three digitized signals in a certain way) to digitize the components, respectively digitize the luminance signal and the two color difference signals, and then arrange the digitized height and color difference signals into a code stream.
在生成合成视频信号的过程中，可以根据回显功能和模式预览功能请求连接数比例动态分配采集帧率，假设Ark5000处理器每套流媒体设备最大的帧率为60fps。如果智能显示设备(如拼接墙)的回显功能请求或者只有模式预览功能请求，那处理器60帧采集都是拼接墙回显或者模式预览。如果这时有一路拼接墙回显功能请求和一路模式预览功能请求，那就平分60帧采集信号(采集卡第1帧采集回显信号，第2帧采集模式预览信号，第3帧采集回显信号….交替采集以此类推…..第59帧采集回显信号，第60帧采集模式预览信号)，如果这时是有两路拼接墙回显功能请求和一路模式预览功能请求(采集卡第1帧采集回显信号，第2帧采集模式回显信号，第3帧采集模式预览信号，第4帧采集回显信号….交替采集以此类推…..第58帧采集回显信号第59帧采集回显信号，第60帧采集模式预览信号)。根据回显功能和模式预览功能请求连接数比例动态分配采集帧率。In the process of generating composite video signals, the acquisition frame rate can be dynamically allocated according to the ratio of the number of connections requested by the echo function and the mode preview function. Assume that the maximum frame rate of each streaming media device of the Ark5000 processor is 60fps. If the echo function of the intelligent display device (such as a video wall) is requested or only the mode preview function is requested, then the 60 frames collected by the processor are all video wall echo or mode preview. If there is a video wall echo function request and a mode preview function request at this time, then divide the 60-frame acquisition signal equally (the first frame of the acquisition card acquires the echo signal, the second frame acquires the mode preview signal, and the third frame acquires the echo Signal... Alternate collection and so on.....The 59th frame collects the echo signal, and the 60th frame collects the mode preview signal), if there are two channels of video wall echo function requests and one mode preview function requests (acquisition card The echo signal is collected in the first frame, the echo signal in the acquisition mode of the second frame, the preview signal in the acquisition mode of the third frame, and the echo signal is collected in the fourth frame... Alternate acquisition and so on... The echo signal is collected in the 58th frame The 59th frame collects the echo signal, and the 60th frame collects the preview signal). Dynamically allocate the acquisition frame rate according to the ratio of the number of connections requested by the echo function and the mode preview function.
智能显示设备的处理器可以利用异步时分复用进行视频信号传输，异步时分复用原理让回显信号和模式预览信号合路传输，接收端(例如解码盒、解码单元或者软件解码客户端)对解复用后的各路信号进行数据处理，得到拼接墙回显信息和模式预览信息，实现Ark5000处理器的多点功能实时串联运行监控输出。The processor of the smart display device can use asynchronous time-division multiplexing for video signal transmission. The principle of asynchronous time-division multiplexing allows the echo signal and mode preview signal to be combined for transmission. The receiving end (such as a decoding box, decoding unit or software decoding client) After demultiplexing, the signals of each channel are processed for data, and the echo information and mode preview information of the splicing wall are obtained, and the multi-point function of the Ark5000 processor is realized for real-time serial operation monitoring output.
将整个传输时间分割为互不重叠的时间间隔，又称为时隙。分时复用技术将这些时隙分配给每一个信号源使用，每个时隙只能被一路信号占用。分时复用通过在时间上交叉发送每一路信号的一部分来实现一条电路传送多路信号。电路上的每一短暂时刻只有一路信号存在。异步分时复用是一种根据用户实际需要动态分配信道资源的分时复用技术。异步分时复用技术将用户的数据划分为一个个数据单元，不同用户的数据单元仍按照时分的方式来共享信道，但会根据用户需求动态分配时隙，以避免每帧中出现空闲的时隙。Divide the entire transmission time into non-overlapping time intervals, also called time slots. Time-division multiplexing technology allocates these time slots to each signal source, and each time slot can only be occupied by one signal. Time-division multiplexing enables one circuit to transmit multiple signals by interleaving a part of each signal in time. Only one signal exists at every brief moment on the circuit. Asynchronous time-division multiplexing is a time-division multiplexing technology that dynamically allocates channel resources according to the actual needs of users. Asynchronous time-division multiplexing technology divides user data into data units. Data units of different users still share channels in a time-division manner, but time slots are dynamically allocated according to user needs to avoid idle time in each frame. Gap.
本实施例能在有限硬件设备限制实现Ark5000等智能显示设备的处理器能提供拼接墙回显功能和模式预览功能多功能采集输出。使用多路气复用技术可以降低单个处理器的造价。本实施例利用了一种灵活的动态调帧的方法，能动态有效根据真实用户需求均衡处理信号采集，最大限度发挥处理器媒流体处理功能。This embodiment can realize that the processor of an intelligent display device such as Ark5000 can provide a splicing wall echo function and a mode preview function for multi-functional acquisition and output under the limitation of limited hardware devices. The cost of a single processor can be reduced by using multiplexing technology. This embodiment utilizes a flexible method of dynamic frame adjustment, which can dynamically and effectively balance signal acquisition according to real user needs, and maximize the media flow processing function of the processor.
参考图4所示，图4所示为一个实施例的多路视频信号的传输系统结构示意图，包括：Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a transmission system for multiple video signals of an embodiment, including:
数字化处理模块10，用于分别对各路待传输的视频信号进行数字化处理，得到多路数字视频数据；The digital processing module 10 is used to digitally process each video signal to be transmitted respectively to obtain multi-channel digital video data;
获取模块20，用于获取各路数字视频数据的帧数比；Obtaining module 20, is used for obtaining the frame number ratio of each road digital video data;
填充模块30，用于根据所述帧数比交替从各路数字视频数据中采样帧数据填充传输链路的时隙，得到各路数字视频数据对应的合成视频信号；The filling module 30 is used to alternately sample frame data from each channel of digital video data to fill the time slot of the transmission link according to the frame number ratio, so as to obtain a synthetic video signal corresponding to each channel of digital video data;
分解模块40，用于将所述合成视频信号传输至解码单元，在所述解码单元对合成视频信号进行解复处理，将所述合成视频信号分解为各路数字视频数据；Decomposition module 40, is used for transmitting described synthesized video signal to decoding unit, decomplexes the synthesized video signal in described decoding unit, decomposes described synthesized video signal into various digital video data;
发送模块50，用于分别将各路数字视频数据发送至显示界面中各路数字视频数据对应的显示窗口。The sending module 50 is configured to send each channel of digital video data to a display window corresponding to each channel of digital video data in the display interface.
本发明提供的多路视频信号的传输系统与本发明提供的多路视频信号的传输方法一一对应，在所述多路视频信号的传输方法的实施例阐述的技术特征及其有益效果均适用于多路视频信号的传输系统的实施例中，特此声明。The multi-channel video signal transmission system provided by the present invention corresponds to the multi-channel video signal transmission method provided by the present invention, and the technical features and beneficial effects described in the embodiment of the multi-channel video signal transmission method are applicable In the embodiment of the multi-channel video signal transmission system, hereby declare.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.
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