CN104735410B - A kind of narrow bandwidth video transmission method and system lower than 4K/S - Google Patents

A kind of narrow bandwidth video transmission method and system lower than 4K/S Download PDF

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Publication number
CN104735410B
CN104735410B CN201510071756.XA CN201510071756A CN104735410B CN 104735410 B CN104735410 B CN 104735410B CN 201510071756 A CN201510071756 A CN 201510071756A CN 104735410 B CN104735410 B CN 104735410B
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China
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video
transmission
network
according
caching
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CN201510071756.XA
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Chinese (zh)
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CN104735410A (en
Inventor
李洋
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东电创新(北京)科技发展股份有限公司
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Abstract

The narrow bandwidth video transmission method and system that the invention discloses a kind of lower than 4K/S, the method includes video acquisitions;The low damage high power of video stream media file is compressed using USDC coding techniques;The transmission of video frame is adjusted according to network environment;Video server receives and distributes video flowing;Video receiver receives, decoding, plays video.Using technical solution disclosed by the invention, it is small to transmit minimum high-definition image occupied bandwidth, image quality clear and smooth, picture delay, operation cost is reduced, to solve the bottleneck problem between fine definition high code stream and bandwidth deficiency.

Description

A kind of narrow bandwidth video transmission method and system lower than 4K/S

Technical field

The present invention relates to video compress and transmission field, and in particular to a kind of narrow bandwidth video transmission method lower than 4K/S And system.

Background technique

CIF is common standard image format, means public intermediate form (Common Intermediate Format).CIF (352 × 288), D1 (704 × 576), 720P (1280*720), 1080P are mainly used in monitoring trade at present Several resolution ratio such as (1920*1080), wherein CIF video recording resolution ratio is mainstream resolution ratio, and most products are all using CIF points Resolution.Existing market receives CIF resolution ratio, and main reason has at following 4 points:

1, digital monitoring requirement video code flow cannot be too high at present;

2, video transmission bandwidth is also restricted;

3, clarity can be improved using HALF D1, D1 resolution ratio, meets the requirement of high quality, but be with high code stream Cost;

4, using CIF resolution ratio, for signal-to-noise ratio in 32db or more, general user is acceptable, but is not preferably to regard Frequency picture quality.

D1 amount of storage is high, at high price, and static state playback resolution ratio theoretically reaches as high as the picture quality of 360TVline, More than the image level of simulation monitoring Plays VHS video tape recorder 280TVline, reach Ministry of Public Security's security industry video standard The requirement of the clarity of second level and three-level project meets the requirement of most video monitorings.

Insider is try to the balance sought between CIF, D1 with HALF D1 at present.But with monolithic hard disk Capacity reaches 750GB even 10000B, and domestic most of DVR can accomplish to connect the hard disk of 8 pieces of 1000GB, therefore D1 It gradually will become mainstream often.By testing multitude of video signal, based on current video compression algorithm, DCIF divides Resolution ratio Half D1 can more preferably solve that CIF clarity is not high enough and high, the at high price disadvantage of D1 amount of storage, for solving CIF And 4CIF can obtain stable high quality graphic, meet user to higher image quality especially between 512Kbps code rate Requirement, provide better choice for Video coding.

As the clarity of headend equipment is higher and higher, the corresponding code stream that acquires is also increasing, and transmission becomes bottleneck, very much The scene of " powerful and well-equipped army squeezes single-plank bridge " is presented in monitoring system collocation, and the inefficient use of high price apparatus, this is to perplex industry always Problem.

Summary of the invention

The present invention is to solve the above problems, provide a kind of narrow bandwidth Video transmission system lower than 4K/S, the system packet Video source, transmission network, video receiver are included, wherein video source will be sent to transmission by the video data encoder of coding Video data encoder is distributed at least one video receiver, the video that video receiver will receive by network, transmission network Coded data is decoded, and plays video;

The video source includes video recording equipment, coding controller and bite rate control device, wherein the coding controller is adopted With USDC coding techniques, the low damage high power of video stream media file can be compressed, original image resolution is higher, and compression ratio is higher, It transmits minimum high-definition image occupied bandwidth, image quality clear and smooth, picture and postpones small, saving memory space;The bite rate control device It is cached including two, one is video frame buffer, for storing the video requency frame data from coding controller, the video frame buffer According to free space size in caching and receive whether be key frame determine it is the video requency frame data that will newly receive It is stored in the caching or abandons;Another, for keeping in the video data from video frame buffer, is waited pending to send caching It send, is selectively lost according to the size of the network transmission speed dynamic regulation caching calculated in real time and in network congestion Video frame is abandoned, to guarantee that video can be sent in real time recipient and steadily play;

The transmission network includes routing device, video server, wherein the video server takes flexible scheduling Strategy reasonably selects the distribution path of video flowing according to network broadband, can preferentially select video server when loading smaller Reach optimal service efficiency under complicated network condition to the direct-connected mode of client;

The video receiver is for realizing video reception, video decoding, video playback capability.

Wherein, video recording equipment is web camera+NVR or analog video camera+capture card or analog video camera+hard disk record Camera.

Preferably, video server uses pole distribution mechanisms, i.e., accesses according to video server by multipole distribution mechanisms, It solves the problems, such as multiple users while accessing a camera.

Wherein, video receiver is PC machine or mobile phone or laptop or PAD.

Preferably, management and control equipment is in addition separately provided, or in video receiver integrated management control function.

The narrow bandwidth video transmission method that the present invention also provides a kind of lower than 4K/s, this method comprises the following steps:

Step 1: video acquisition;

Step 2;Coding controller is compressed the low damage high power of video stream media file using USDC coding techniques, original image point Resolution is higher, and compression ratio is higher;

Step 3: bite rate control device adjusts the transmission of video frame according to network environment, which includes two slow It deposits, one is video frame buffer, and for storing the video requency frame data from coding controller, the video frame buffer is according in caching Free space size and receive whether be key frame determine be the video requency frame data that will newly receive be stored in the caching, Or it abandons;Another for send caching, for keep in the video data from video frame buffer, wait it is to be sent, according to real-time The size of the network transmission speed dynamic regulation of the calculating caching and video frame is selectively abandoned in network congestion, from And recipient can be sent in real time and steadily play by guaranteeing video;

Step 4: video server receives and distributes video flowing, i.e., the distribution road of video flowing is reasonably selected according to network broadband Diameter preferentially selects video server to reach most under complicated network condition to the direct-connected mode of client when loading smaller Good service efficiency;

Step 5: video receiver receives, decoding, plays video.

Wherein, video acquisition uses web camera+NVR or analog video camera+capture card, or simulation camera shooting in step 1 Machine+hard disk video recorder.

Preferably, video server uses pole distribution mechanisms in step 4, i.e., according to video server access by multipole point Hair mechanism solves the problems, such as multiple users while accessing a camera.

Wherein, video receiver is PC machine or mobile phone or laptop or PAD.

Preferably, management and control equipment is separately provided, management control is realized to transmission of video, or in video receiver collection At management control function, to be managed control to transmission of video.

The present invention has the advantages that transmission compared to the prior art, and high-definition image occupied bandwidth is minimum, image quality clearly flows Freely, picture delay is small, reduces operation cost, to thoroughly solve the bottleneck between fine definition high code stream and bandwidth deficiency Problem.

Detailed description of the invention

Fig. 1 is network environment structural schematic diagram applied by the present invention;

Fig. 2 is the structural schematic diagram of the narrow bandwidth Video transmission system of the embodiment of the present invention;

Fig. 3 is the unkind figure of process of the narrow bandwidth video transmission method of the embodiment of the present invention.

Specific embodiment

The preferred embodiment of the present invention hereafter is described with detailed reference to attached drawing, whereby to the present invention how applied technology method Technical problem is solved, and the realization process for reaching technical effect can fully understand and implement.For this hair of comprehensive understanding It is bright, many details are referred in the following detailed description, it will be understood by those skilled in the art that the present invention may not need these Detail and realize.

As shown in Figure 1, the network architecture applied by the present invention includes video source, transmission network, video receiver, wherein Video source will be sent to transmission network by the video data encoder of coding, transmission network by video data encoder be distributed to A few video receiver, the video data encoder received is decoded by video receiver, and plays video.

As shown in Fig. 2, video source includes video recording equipment, coding controller and bite rate control device, wherein video recording equipment example For example web camera+NVR, analog video camera+capture card, analog video camera+hard disk video recorder etc.;The coding controller is adopted With USDC coding techniques, the low damage high power of video stream media file can be compressed, original image resolution is higher, and compression ratio is higher, Transmission high-definition image occupied bandwidth minimum (be equivalent to the 1 of currently a popular H.264 compression algorithm | 4), is drawn at image quality clear and smooth Face delay is small, saves memory space;The bite rate control device includes two cachings, and one is video frame buffer, is come for storing From the video requency frame data of coding controller, the video frame buffer according to cache in free space size and receive whether be Key frame come determine the video requency frame data that will newly receive be stored in the caching or abandon;Another is used for send caching The temporary video data from video frame buffer, waits to be sent, and according to the network transmission speed dynamic regulation calculated in real time, this is slow The size deposited and video frame is selectively abandoned in network congestion, to guarantee that video can be sent in real time recipient simultaneously Steady to play, this method can be effectively applied to real-time transmission of video monitoring under narrow bandwidth network environment.Video source can also Other are thought with recording or storage video capability and there is the equipment for carrying out USDC encoding function to video.

Transmission network includes routing device, video server etc., and wherein video server is, for example, cloud video server, stream Media delivery server etc., the video server can take flexible scheduling strategy, i.e., reasonably select video according to network broadband The distribution path of stream can preferentially select video server to the direct-connected mode of client, in complicated network when loading smaller Under the conditions of, reach optimal service efficiency.In addition, video server uses pole distribution mechanisms, i.e., accessed according to video server By multipole distribution mechanisms, solves the problems, such as multiple users while accessing a camera.

Video receiver for realizing video reception, video decoding, video playback capability, for example, PC machine, mobile phone, Laptop, PAD etc..

In addition, management and control equipment can be separately provided, it can also be in video receiver integrated management control function.

The system is under identical network environment, it is only necessary to the ultralow code stream of 2KB to 8KB, transmission CIF that can be smooth The audio-video of (352X288) image quality, the preferably bit stream to be lower than 4K/S;Only need the ultralow code stream of 8KB to 15KB The audio-video of smooth transmission D1 (704X576) image quality;720P can be transmitted by only needing the ultralow code stream of 12KB to 20KB The audio-video of (1280X720) image quality;And the delay of remote image real-time Transmission was less than 1 second.

As shown in figure 3, narrow bandwidth video transmission method of the invention the following steps are included:

Step 1: video acquisition, such as use web camera+NVR, analog video camera+capture card, analog video camera+hard Disk video recorder is acquired;

Step 2: coding controller is compressed the low damage high power of video stream media file using USDC coding techniques, original image point Resolution is higher, and compression ratio is higher;

Step 3: bite rate control device adjusts the transmission of video frame according to network environment, which includes two slow It deposits, one is video frame buffer, and for storing the video requency frame data from coding controller, the video frame buffer is according in caching Free space size and receive whether be key frame determine be the video requency frame data that will newly receive be stored in the caching, Or it abandons;Another for send caching, for keep in the video data from video frame buffer, wait it is to be sent, according to real-time The size of the network transmission speed dynamic regulation of the calculating caching and video frame is selectively abandoned in network congestion, from And recipient can be sent in real time and steadily play by guaranteeing video;

Step 4: video server receives and distributes video flowing, i.e., the distribution road of video flowing is reasonably selected according to network broadband Diameter preferentially selects video server to reach most under complicated network condition to the direct-connected mode of client when loading smaller Good service efficiency;In addition, video server uses pole distribution mechanisms, i.e., access according to video server by multipole sorter System solves the problems, such as multiple users while accessing a camera.

Step 5: video receiver receives, decoding, plays video.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to restrict the invention, all in spirit of that invention and original Any modifications, equivalent replacements, and improvements etc. done within then, is both contained within protection scope of the present invention.

Claims (8)

1. a kind of narrow bandwidth Video transmission system lower than 4K/S, the system include video source, transmission network, video reception End, wherein video source will be sent to transmission network by the video data encoder of coding, and transmission network is by video data encoder It is distributed at least one video receiver, the video data encoder received is decoded by video receiver, and plays video;
The video source includes video recording equipment, coding controller and bite rate control device, wherein the coding controller uses USDC coding techniques can compress the low damage high power of video stream media file, and original image resolution is higher, and compression ratio is higher, passes Defeated high-definition image occupied bandwidth is minimum, image quality clear and smooth, picture delay is small, saves memory space;The bite rate control device packet Two cachings are included, one is video frame buffer, for storing the video requency frame data from coding controller, the video frame buffer root According to free space size in caching and receive whether be key frame determine it is that the video requency frame data that will newly receive is deposited Enter the caching or abandons;Another for send caching, for keep in the video data from video frame buffer, wait it is to be sent, It is selectively abandoned according to the size of the network transmission speed dynamic regulation caching calculated in real time and in network congestion Video frame, to guarantee that video can be sent in real time recipient and steadily play;
The transmission network includes routing device, video server, wherein the video server takes flexible scheduling strategy, The distribution path that video flowing is reasonably selected according to network broadband, selects video server to the straight of client when loading smaller Even mode reaches optimal service efficiency under complicated network condition;
The video receiver is for realizing video reception, video decoding, video playback capability.
2. system according to claim 1, which is characterized in that video recording equipment is web camera+NVR, or simulation camera shooting Machine+capture card or analog video camera+hard disk video recorder.
3. system described in any one of -2 according to claim 1, which is characterized in that video receiver is PC machine or mobile electricity Words or laptop or PAD.
4. system described in any one of -2 according to claim 1, which is characterized in that management and control equipment is in addition separately provided, Or in video receiver integrated management control function.
5. a kind of narrow bandwidth video transmission method lower than 4K/S, this method comprises the following steps:
Step 1: video acquisition;
Step 2: coding controller is compressed the low damage high power of video stream media file using USDC coding techniques, original image resolution Higher, compression ratio is higher;
Step 3: bite rate control device adjusts the transmission of video frame according to network environment, which includes two and cache, and one A is video frame buffer, and for storing the video requency frame data from coding controller, the video frame buffer is according to idle in caching Space size and receive whether be key frame determine the video requency frame data that will newly receive be stored in the caching or It abandons;Another is sends caching, for keeping in the video data from video frame buffer, waits to be sent, is calculated according to real-time The network transmission speed dynamic regulation caching size and selectively abandon video frame in network congestion, to protect Card video can be sent in real time recipient and steadily play;
Step 4: video server receives and distributes video flowing, i.e., the distribution path of video flowing is reasonably selected according to network broadband, When loading smaller, selection video server is to the direct-connected mode of client, and under complicated network condition, reaching optimal makes Use efficiency;
Step 5: video receiver receives, decoding, plays video.
6. according to the method described in claim 5, it is characterized in that, in step 1 video acquisition use web camera+NVR, or Analog video camera+capture card or analog video camera+hard disk video recorder.
7. the method according to any one of claim 5-6, which is characterized in that video receiver is PC machine or mobile electricity Words or laptop or PAD.
8. the method according to any one of claim 5-6, which is characterized in that management and control equipment is separately provided to video Management control is realized in transmission, or in video receiver integrated management control function, to be managed control to transmission of video.
CN201510071756.XA 2015-02-11 2015-02-11 A kind of narrow bandwidth video transmission method and system lower than 4K/S CN104735410B (en)

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CN106534055A (en) * 2015-09-15 2017-03-22 广州世荣电子有限公司 Video transmission method and system

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