CN104735410A - Narrow bandwidth lower than 4 K/S video transmission method and system - Google Patents
Narrow bandwidth lower than 4 K/S video transmission method and system Download PDFInfo
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Abstract
The invention discloses a narrow bandwidth lower than 4 K/S video transmission method and system. The narrow bandwidth lower than 4 K/S video transmission method comprises the steps that a video is captured; a USDC coding technology is adopted to perform high power compression on video streaming media files with low damage; the sending of video frames is adjusted according to the network environment; a video server receives and distributes video streaming; a video receiving end receives, decodes and plays the video. By the adoption of the technical scheme of the narrow bandwidth lower than 4 K/S video transmission method and system, the bandwidth occupied by transferring high-definition images is minimal, the image quality is clear and smooth, the image delay is small, the operating cost is reduced, and therefore, the bottleneck problem between the high definition high code streaming and lack of bandwidth is solved.
Description
Technical field
The present invention relates to video compression and transmission field, be specifically related to a kind of narrow bandwidth video transmission method lower than 4K/S and system.
Background technology
CIF is conventional standard image format, means public intermediate form (Common Intermediate Format).Several resolution such as CIF (352-288), D1 (704 × 576), 720P (1280*720), 1080P (1920*1080) are mainly used in current monitoring trade, wherein CIF video recording resolution is main flow resolution, and most product all adopts CIF resolution.Existing market accepts CIF resolution, and main reason has following 4 points:
1, current digital monitoring requirement video code flow can not be too high;
2, video transmission bandwidth is also restricted;
3, use HALF D1, D1 resolution to promote clearness, meet high-quality requirement, but take high code stream as cost;
4, adopt CIF resolution, signal to noise ratio is at more than 32db, and general user is acceptable, but is not desirable video image quality.
D1 memory space is high, price is high, static playback resolution reaches as high as the picture quality of 360TVline in theory, exceed the image level of simulation monitoring Plays VHS video tape recorder 280TVline, reach the definition requirement of Ministry of Public Security's security protection industry video standard secondary and three grades of projects, meet the requirement of most video monitoring.
Current insider is attempting the balance of seeking between CIF, D1 with HALF D1.But the capacity along with monolithic hard disk reaches 750GB even 1000GB, and domestic most of DVR can accomplish the hard disk of connection 8 pieces of 1000GB, therefore D1 can become main flow often gradually.Through testing multitude of video signal, based on current video compression algorithm, DCIF resolution can better solve the shortcoming that CIF definition is not high enough He D1 memory space is high, price is high than Half D1, with solving CIF and 4CIF, particularly between 512Kbps code check, can stable high quality graphic be obtained, meet the requirement of user to higher image quality, for Video coding provides better selection.
Along with the definition of headend equipment is more and more higher, corresponding collection code stream is also increasing, and transmission becomes bottleneck, and a lot of supervisory control system collocation present the scene of " powerful and well-equipped army squeezes single-plank bridge ", and high price apparatus poor efficiency uses, and this is the difficult problem always perplexing industry.
Summary of the invention
The present invention is for solving the problem, provide a kind of narrow bandwidth Video transmission system lower than 4K/S, this system comprises video source, transmission network, video receiver, wherein the video data encoder through coding is sent to transmission network by video source, video data encoder is distributed at least one video receiver by transmission network, and the video data encoder received is decoded by video receiver, and displaying video;
Described video source comprises video recording equipment, coding controller and bite rate control device, wherein said coding controller adopts USDC coding techniques, can by low for video stream media file damage high power compression, original image resolution is higher, compression ratio is higher, and transmission high-definition image occupied bandwidth is minimum, image quality clear and smooth, picture postpone little, saving memory space; Described bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides received video requency frame data stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, abandon frame of video selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensure that video can be sent to recipient in real time and steadily play;
Described transmission network comprises routing device, video server, wherein said video server takes scheduling strategy flexibly, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less can prioritizing selection video server to the direct-connected mode of client, under the network condition of complexity, reach best service efficiency;
Described video receiver is used for realizing video reception, video decode, video playback capability.
Wherein, video recording equipment is web camera+NVR, or analog video camera+capture card, or analog video camera+DVR.
Preferably, video server adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
Wherein, video receiver is PC or mobile phone or notebook computer or PAD.
Preferably, in addition management and control equipment is set separately, or at video receiver integrated management controlling functions.
Present invention also offers a kind of narrow bandwidth video transmission method lower than 4K/S, the method comprises the steps:
Step 1: video acquisition;
Step poly-2: coding controller adopts USDC coding techniques low for video stream media file damage high power to be compressed, and original image resolution is higher, and compression ratio is higher;
Step poly-3: bite rate control device regulates the transmission of frame of video according to network environment, this bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides the video requency frame data newly received stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, abandon frame of video selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensure that video can be sent to recipient in real time and steadily play;
Step 4: video server receives and distribution of video stream, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less, prioritizing selection video server is to the direct-connected mode of client, under the network condition of complexity, reaches best service efficiency;
Step 5: video receiver reception, decoding, displaying video.
Wherein, in step 1, video acquisition uses web camera+NVR, or analog video camera+capture card, or analog video camera+DVR.
Preferably, in step 4, video server adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
Wherein, video receiver is PC or mobile phone or notebook computer or PAD.
Preferably, management and control equipment is set separately management control is realized to transmission of video, or at video receiver integrated management controlling functions, control to carry out management to transmission of video.
The present invention has the following advantages compared to prior art tool: transmission high-definition image occupied bandwidth is minimum, image quality clear and smooth, picture postpone little, reduces operation cost, thus thoroughly solves the bottleneck problem of asking of high definition high code stream and bandwidth deficiency.
Accompanying drawing explanation
The network environment structural representation that Fig. 1 applies for the present invention;
Fig. 2 is the structural representation of the narrow bandwidth Video transmission system of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the narrow bandwidth video transmission method of the embodiment of the present invention.
Embodiment
Hereafter describe the preferred embodiments of the present invention with detailed reference to accompanying drawing, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.In order to complete understanding the present invention, refer to many details in the following detailed description, but it should be appreciated by those skilled in the art that the present invention can realize without the need to these details.
As shown in Figure 1, the network architecture that the present invention applies comprises video source, transmission network, video receiver, wherein the video data encoder through coding is sent to transmission network by video source, video data encoder is distributed at least one video receiver by transmission network, the video data encoder received is decoded by video receiver, and displaying video.
As shown in Figure 2, video source comprises video recording equipment, coding controller and bite rate control device, and wherein video recording equipment is such as web camera+NVR, analog video camera+capture card, analog video camera+DVR etc.; Described coding controller adopts USDC coding techniques, can by low for video stream media file damage high power compression, original image resolution is higher, compression ratio is higher, and transmission high-definition image occupied bandwidth minimum (being equivalent to the 1|4 of H.264 compression algorithm popular at present), image quality clear and smooth, picture postpone little, saving memory space; Described bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides the video requency frame data newly received stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, frame of video is abandoned selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensureing that video can be sent to recipient in real time and steadily play, the method can be effectively applied to real-time transmission of video and monitor under narrow bandwidth network environment.Video source also can have recording or store video function and have equipment video being carried out to USDC encoding function for other.
Transmission network comprises routing device, video server etc., wherein video server is such as cloud video server, stream media distribution server etc., this video server can take scheduling strategy flexibly, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less can prioritizing selection video server to the direct-connected mode of client, under the network condition of complexity, reach best service efficiency.In addition, video server adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
Video receiver is used for realizing video reception, video decode, video playback capability, such as, be PC, mobile phone, notebook computer, PAD etc.
In addition, management and control equipment can be set separately, also can at video receiver integrated management controlling functions.
This system, under identical network environment, only needs the ultralow code stream of 2KB to 8KB, and the audio frequency and video of transmission CIF (352X288) image quality that can be smooth, preferably with the bit stream lower than 4K/S; Only need the ultralow code stream of 8KB to 15KB, the audio frequency and video of transmission D1 (704X576) image quality that can be smooth; Only need the ultralow code stream of 12KB to 20KB can transmit the audio frequency and video of 720P (1280X720) image quality; And remote image real-time Transmission postpones to be less than 1 second.
As shown in Figure 3, narrow bandwidth video transmission method of the present invention comprises the following steps:
Step 1: video acquisition, such as, use web camera+NVR, analog video camera+capture card, analog video camera+DVR to gather;
Step 2: coding controller adopts USDC coding techniques low for video stream media file damage high power to be compressed, and original image resolution is higher, and compression ratio is higher;
Step 3: bite rate control device regulates the transmission of frame of video according to network environment, this bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides the video requency frame data newly received stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, abandon frame of video selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensure that video can be sent to recipient in real time and steadily play;
Step 4: video server receives and distribution of video stream, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less, prioritizing selection video server is to the direct-connected mode of client, under the network condition of complexity, reaches best service efficiency; In addition, video encoder adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
Step 5: video receiver reception, decoding, displaying video.
The foregoing is only preferred embodiment of the present invention, be not limited to the present invention, all equivalent modifications, equivalent replacement and improvement etc. done within the present invention's spirit and principle, are all contained within protection scope of the present invention.
Claims (10)
1. the narrow bandwidth Video transmission system lower than 4K/S, this system comprises video source, transmission network, video receiver, wherein the video data encoder through coding is sent to transmission network by video source, video data encoder is distributed at least one video receiver by transmission network, the video data encoder received is decoded by video receiver, and displaying video;
Described video source comprises video recording equipment, coding controller and bite rate control device, wherein said coding controller adopts USDC coding techniques, can by low for video stream media file damage high power compression, original image resolution is higher, compression ratio is higher, and transmission high-definition image occupied bandwidth is minimum, image quality clear and smooth, picture postpone little, saving memory space; Described bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides the video requency frame data newly received stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, abandon frame of video selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensure that video can be sent to recipient in real time and steadily play;
Described transmission network comprises routing device, video server, wherein said video server takes scheduling strategy flexibly, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less can prioritizing selection video server to the direct-connected mode of client, under the network condition of complexity, reach best service efficiency;
Described video receiver is used for realizing video reception, video decode, video playback capability.
2. system according to claim 1, is characterized in that, video recording equipment is web camera+NVR, or analog video camera+capture card, or analog video camera+DVR.
3. system according to claim 1 and 2, is characterized in that, video server adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
4. the system according to any one of claim 1-3, is characterized in that, video receiver is PC or mobile phone or the various terminal equipment such as notebook computer or PAD.
5. the system according to any one of claim 1-4, is characterized in that, arranges management and control equipment separately in addition, or at video receiver integrated management controlling functions.
6., lower than a narrow bandwidth video transmission method of 4K/S, the method comprises the steps:
Step 1: video acquisition;
Step 2: coding controller adopts USDC coding techniques low for video stream media file damage high power to be compressed, and original image resolution is higher, and compression ratio is higher;
Step 3: bite rate control device regulates the transmission of frame of video according to network environment, this bite rate control device comprises two buffer memorys, one is frame of video buffer memory, for storing the video requency frame data from coding controller, this frame of video buffer memory is according to free space size in buffer memory and whether what receive be that key frame decides the video requency frame data newly received stored in this buffer memory or abandon; Another is for sending buffer memory, for the temporary video data from frame of video buffer memory, etc. to be sent, abandon frame of video selectively according to the size of this buffer memory of network transmission speed dynamic adjustments calculated in real time and when network congestion, thus ensure that video can be sent to recipient in real time and steadily play;
Step 4: video server receives and distribution of video stream, namely according to the distribution path of network broadband choose reasonable video flowing, when load is less, prioritizing selection video server is to the direct-connected mode of client, under the network condition of complexity, reaches best service efficiency;
Step 5: video receiver reception, decoding, displaying video.
7. method according to claim 6, is characterized in that, in step 1, video acquisition uses web camera+NVR, or analog video camera+capture card, or analog video camera+DVR.
8. the method according to claim 6 or 7, is characterized in that, in step 4, video server adopts pole distribution mechanisms, namely accesses by multipole distribution mechanisms according to video server, solves the problem that multiple user accesses a camera simultaneously.
9. the method according to any one of claim 6-8, is characterized in that, video receiver is PC or mobile phone or notebook computer or PAD.
10. the method according to any one of claim 6-9, is characterized in that, arranges separately management and control equipment and realizes management control to transmission of video, or at video receiver integrated management controlling functions, controls to carry out management to transmission of video.
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