CN213094282U - On-cloud director - Google Patents
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- CN213094282U CN213094282U CN202120444423.8U CN202120444423U CN213094282U CN 213094282 U CN213094282 U CN 213094282U CN 202120444423 U CN202120444423 U CN 202120444423U CN 213094282 U CN213094282 U CN 213094282U
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Abstract
The utility model provides a device of directing a broadcast on cloud, including encoder, first cloud directing a broadcast platform and second cloud directing a broadcast platform, the video signal that every camera was received to the encoder carries out different resolution ratios and code rate coding back and exports first way coded signal and second way coded signal respectively, the time delay of second way coded signal is less than first way coded signal, the resolution ratio of second way coded signal is less than the resolution ratio of first way coded signal, first way coded signal transmits for first cloud directing a broadcast platform, second way coded signal transmits for second cloud directing a broadcast platform, and second cloud directing a broadcast platform carries out the directing a broadcast preparation to second way coded signal, and the preparation information that generates to correspond transmits for first cloud directing a broadcast platform, and first cloud directing a broadcast platform basis preparation information makes first way coded signal. The on-cloud broadcasting guide device not only ensures the continuity of camera lens switching, but also can guide broadcasting with high quality.
Description
Technical Field
The utility model relates to a cloud directing technical field, more specifically relates to a broadcasting device on cloud.
Background
The rebroadcasting vehicle is manufactured by field broadcasting, and is used for switching or mixing multiple paths of video live broadcast input into one path of video stream output according to needs. The existing broadcasting guide scene is made by a baseband signal without delay or with extremely low delay (< 10 ms) on site. And the director instructs the camera personnel to shoot (tune) according to the seen non-delay or extremely-low-delay (< 10 ms) video signals, and performs director switching to complete the production of rebroadcast signals. Therefore, the director must see the picture as a non-delayed or very low-delayed (< 10 ms) picture taken by the camera to direct the broadcast.
Along with the development of cloud technology, the cloud director technology is mature day by day, and the camera outputs baseband signals such as HDMI/SDI, and the 4K signal code rate is about 12G, and the high definition signal code rate is about 3G, and the signal code rate is too big, unable direct transmission, must pass through the code compression just can transmit the cloud, that is to say, rebroadcast signal transmission carries out the director preparation to the cloud, just must compress the code and can transmit. Only the baseband signal can be generated in the cloud, and therefore the transmitted signal must be decoded first to obtain the baseband signal. Encoding and decoding are indispensable steps in the cloud transmission process, but the encoding and decoding can generate time delay, the higher the quality of the video, the more complex the algorithm is, and the more serious the time delay generated by encoding and decoding is at the expense of calculation time. And the received signal is restored to be a baseband signal for broadcasting and manufacturing. Due to the codec and transmission process, the retransmitted signal will have a delay. At present, after 4K codes are transmitted to a cloud terminal for decoding, the basic delay is about 800 ms. If the signal delay is greater than 200ms, the picture to be shot by the director tuner may be lost, and the influence is larger if the delay is larger, so that the director cannot complete the production of the director signal according to the own idea.
The delay time is related to video quality coding, and the higher the quality of video, the more serious the delay generated by coding and decoding is at the cost of computation time. At present, 4K coding and decoding (including coding of HDR and BT2020 color gamut) is about 600-700 ms at 40Mbps, and the delay of a video signal coded and transmitted to a cloud broadcasting guide station for decoding and manufacturing is 1-3 seconds.
In summary, to ensure the normal use of the cloud director, a device must be found that not only meets the low-latency (< 200 ms) requirement of the director tuner, but also ensures the quality of signal output (4K, >40 Mbps).
Disclosure of Invention
In view of the above, the present invention provides a broadcasting device on the cloud capable of ensuring the continuity of lens switching of the camera and high quality broadcasting.
According to an aspect of the utility model provides a device of broadcasting a director on cloud, including encoder, first cloud broadcasting guide platform and second cloud broadcasting guide platform, the video signal that every camera was received to the encoder carries out different resolution ratios and code rate coding back and exports first way coded signal and second way coded signal respectively, the time delay of second way coded signal is less than first way coded signal, the resolution ratio of second way coded signal is less than the resolution ratio of first way coded signal, first way coded signal transmits for first cloud broadcasting guide platform, second way coded signal transmits for second cloud broadcasting guide platform, and second cloud broadcasting guide platform carries out the broadcasting preparation to second way coded signal, generates corresponding preparation information transmission and gives first cloud broadcasting guide platform, and first cloud broadcasting guide platform basis preparation information makes first way coded signal.
The on-cloud director device further comprises a synchronizer for carrying out clock time service on the first path of coded signals and the second path of coded signals output by the encoder.
The cloud broadcasting directing device comprises a first encoder and a second encoder, wherein the first encoder and the second encoder receive video signals of the same camera and respectively encode the video signals, the first encoder outputs a first path of encoded signals, and the second encoder outputs a second path of encoded signals.
The cloud director device comprises a synchronizer, a first channel encoder, a second channel encoder, a third channel encoder, a fourth channel encoder, a fifth channel encoder, a sixth channel encoder.
The on-cloud director device, wherein the synchronizer comprises one or more of a GPS and an NTP server.
The on-cloud director device is configured to, where a delay of the second encoded signal is less than <200 ms.
The second cloud broadcasting guide platform sends a control signal to the camera to switch the camera lens.
According to the utility model discloses a another aspect provides a device of broadcasting a director on cloud, including encoder, first cloud broadcasting guide platform and local broadcasting guide platform, the video signal of every camera is received to the encoder exports first way coded signal and second way coded signal respectively after carrying out different resolution ratios and code rate coding, the time delay of second way coded signal is less than first way coded signal, the resolution ratio of second way coded signal is less than the resolution ratio of first way coded signal, first way coded signal transmits for first cloud broadcasting guide platform, second way coded signal transmits for local broadcasting guide platform through the network, and local broadcasting guide platform carries out the broadcasting preparation to second way coded signal, and the preparation information that generates to correspond transmits for first cloud broadcasting guide platform, and first cloud broadcasting guide platform basis preparation information makes first way coded signal.
The on-cloud director device further comprises a synchronizer for carrying out clock time service on the first path of coded signals and the second path of coded signals output by the encoder.
The cloud broadcasting directing device comprises a first encoder and a second encoder, wherein the first encoder and the second encoder receive video signals of the same camera and respectively encode the video signals, and respectively output a first path of encoded signals and a second path of encoded signals.
The on-cloud broadcasting guide device outputs the second path of low-delay coded signals through the encoder to conduct broadcasting guide manufacturing, can guarantee the continuity of switching of different paths of camera lenses, manufactures the high-quality first path of coded signals output by the encoder according to the manufacturing information of the second path of coded signals, and can conduct broadcasting guide of high-quality signals.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic view of a block diagram of an embodiment of a broadcast director on the cloud according to the present invention;
fig. 2 is a schematic diagram of a block diagram of another embodiment of the on-cloud director apparatus according to the present invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram of a block diagram of an embodiment of a cloud broadcasting guide device according to the present invention, as shown in fig. 1, the cloud broadcasting guide device includes an encoder, a first cloud broadcasting guide platform 2 and a second cloud broadcasting guide platform 3, the encoder receives a video signal of each camera as a baseband signal, performs different resolution and code rate coding, and then outputs a first path of coded signal and a second path of coded signal, respectively, a delay of the second path of coded signal is less than that of the first path of coded signal, a resolution of the second path of coded signal is lower than that of the first path of coded signal, the first path of coded signal is transmitted to the first cloud broadcasting guide platform, the second path of coded signal is transmitted to the second cloud broadcasting guide platform, and the second cloud broadcasting guide platform performs real-time broadcasting guide production on the second path of coded signal (the broadcasting guide production refers to performing lens switching on a video shot by multiple paths of cameras, mixed into one video stream), corresponding production information is generated and transmitted to a first cloud broadcasting guide platform, and the first cloud broadcasting guide platform produces the first channel of coding signals according to the production information.
In one embodiment, the plurality of cameras (the first camera S1, the second camera S2, …, the nth camera Sn) capture images from different angles and/or distances, which may be different from the angle and/or distance of the scene being captured, for example, there are cameras for panoramic shooting, some for close-up shooting, some for far-view shooting, some for left-side shooting, some for right-side shooting, and some for person shooting.
The encoder receives video signals of a plurality of cameras, encodes the video signals of each camera into two paths of encoded signals, namely a first path of encoded signals and a second path of encoded signals, wherein the first path of encoded signals has high quality, the second path of encoded signals has low time delay, and the two paths of encoded compressed signals are simultaneously transmitted to a cloud (respectively transmitted to a first cloud broadcasting guide platform and a second cloud broadcasting guide platform). And the director uses the low-delay signal (the second path of coding signal) of the second cloud director station to carry out cloud director operation and dispatching, synchronizes the production information of the director to the other path of high-quality signal end (the first cloud director station), and outputs a broadcasting signal. The requirements of the director tuner and the high-quality signal making and outputting are met.
In an embodiment, the on-cloud director device further includes a synchronizer 5, which performs clock timing on the first path of encoded signal and the second path of encoded signal output by the encoder.
Optionally, the synchronizer comprises one or more of a GPS and NTP server.
In one embodiment, the encoder includes a first encoder 11 and a second encoder 12, where the first encoder and the second encoder receive video signals of the same camera and respectively encode the video signals, and respectively output a first path of encoded signals and a second path of encoded signals.
Optionally, the synchronizer may enable the first path of encoded signal and the second path of encoded signal to simultaneously obtain time service time as frame synchronization information, that is, the synchronizer may simultaneously clock the first path of encoder and the second path of encoder to serve as frame synchronization information of the first path of encoded signal and the second path of encoded signal.
In one embodiment, the second cloud director station sends a control signal to the camera to perform camera lens switching.
In one embodiment, the video signal source SDI/HDMI is captured and outputted by the camera in real time, and the first encoder generates a high-quality signal (first encoded signal) through the two-way encoder, for example, a high-quality code stream such as 4K (> 40 Mbps) or 8K (> 160 Mbps) is generated. The second encoder generates a very low delay (< 200 ms) code stream (the second path of encoded signal) at the cost of low picture resolution (< 1080P code rate, <8 Mbps). The double-path encoder simultaneously takes a synchronous signal (time service time of a GPS/NTP server and the like) from a synchronizer as frame synchronization information, adds a time code on a Transport Stream (TS), and outputs two paths of encoded signals of the same information source (the same camera) carrying the synchronous information in real time, namely, one path of encoded signal is a first path of encoded signal with high quality and high delay, and the other path of encoded signal is a second path of encoded signal with low quality and low delay.
The two paths of coded signals are transmitted to a broadcasting guide table at the cloud end in real time, and the second path of coded signals with low quality and low delay is transmitted to a second cloud broadcasting guide table and used as a video guide, a production, a preview, an operation and a scheduling camera lens. And the high-quality and high-delay first path of coded signals are transmitted to a first cloud program director for actual output, monitoring and the like. And the high-quality manufactured first path coded signal with the same picture as that of the low-delay second path coded signal on the second cloud broadcasting guide platform can be output by combining the time code in the synchronous information because the time code of the high-quality first path coded signal is consistent with that of the second path coded signal.
The second path of coded signals is used for broadcasting, and means that the second cloud broadcasting guide station decodes the second path of coded signals and then codes and transmits the second path of coded signals to the PC terminal broadcasting guide.
The second path of encoded signals is used for production, and in one embodiment, the production refers to performing broadcast guide switching production on a second cloud broadcast guide platform, for example, synthesizing video signals of multiple cameras into one path of video signal, and for example, synthesizing video signals of close shot, long shot, and different angles at different times into a continuous path of video signal. In one embodiment, the production may further include production of inserting slow motion, subtitles, special effects, online packaging, and the like, that is, the production of the second encoded signal at the second cloud director is identical to the production of the first encoded signal at the first cloud director, and the production information sent by the second cloud director to the first cloud director is what production is added to the frame of the video signal of the camera. Due to the low time delay of the second path of coded signals, the second cloud program director can switch the lens in time, and the continuity between lens switching is ensured. Due to the time synchronism of the second path of coded signal and the first path of coded signal, the first path of coded signal has high quality and can be manufactured according to the manufacturing information of the second path of coded signal, so that the continuity of the lens can be ensured and high-quality playing can be realized.
The second path of encoded signals is used for previewing, namely, a plurality of pictures shot by a plurality of cameras are displayed on the local broadcast guiding station through the second cloud broadcast guiding station.
The second path of coded signals is used for operation, namely when the second path of coded signals are decoded to be baseband signals and then manufactured, pictures shot by a camera in which path are selected to be played in which frame;
the second path of coded signals is used for scheduling camera lenses, which means that a picture shot by which camera is selected to be played, when a camera shooting angle or/and a camera focal length which do not accord with a broadcasting guide effect exist, a second cloud broadcasting guide platform sends an adjusting instruction to the camera to adjust the angle or/and the focal length, and the camera lenses can be switched among different cameras or adjusted in the distance or/and the angle between the camera and a shooting scene.
Fig. 2 is a schematic diagram of a block diagram of another embodiment of the on-cloud director of the present invention, as shown in fig. 2, the on-cloud director includes an encoder, a first cloud director station 2 and a local director station 4, the encoder receives video signals of the same camera, encodes the video signals with different resolutions and code rates and then respectively outputs a first path of encoded signals and a second path of encoded signals, the time delay of the second path of coded signals is less than that of the first path of coded signals, the resolution of the second path of coded signals is lower than that of the first path of coded signals, the first path of coded signals are transmitted to a first cloud broadcasting guide platform, the second path of coded signals are transmitted to a local broadcasting guide platform through a network, the local broadcasting guide platform conducts broadcasting guide manufacturing on the second path of coded signals, corresponding manufacturing information is generated and transmitted to the first cloud broadcasting guide platform, and the first cloud broadcasting guide platform manufactures the first path of coded signals according to the manufacturing information.
In one embodiment, the on-cloud director device further includes a synchronizer for performing clock timing on the first path of encoded signal and the second path of encoded signal output by the encoder.
In one embodiment, the encoder includes a first encoder and a second encoder, where the first encoder and the second encoder receive video signals of the same camera and respectively encode the video signals, and respectively output a first path of encoded signals and a second path of encoded signals.
In the embodiment of the on-cloud broadcasting guide apparatus shown in fig. 2, the high-quality code stream (the first path of encoded signal) is transmitted to a broadcasting guide station (the first cloud broadcasting guide station) in the cloud end, and is used for actual output and monitoring. And the low-quality code stream (the second path of coded signal) is transmitted to a local broadcasting station for operation through a network such as an optical fiber, the manufacturing information is transmitted to a first cloud broadcasting station after the low-quality code stream is manufactured locally, and the first cloud broadcasting station controls the high-quality code stream to be switched and output according to the time code. Compared with the on-cloud director device shown in fig. 1, the on-cloud director device shown in fig. 2 omits primary encoding and primary decoding of a second cloud director station, and can better reduce delay.
In the above embodiments, in order to output a synchronous, stable, reliable, and high-quality first path encoded signal, the first cloud director may buffer multiple frames and output a video signal.
In the foregoing embodiments, the delay of the second path of encoded signal is less than <200ms, that is, the total link delay of the second path of encoded signal with low delay is less than 200ms, that is, the total delay output after the second path of encoded signal is encoded by the encoder to the second cloud broadcast guiding station or the local broadcast guiding station and decoded is less than 200 ms.
In a specific embodiment, adopt the cloud director of prior art and the cloud director that this utility model shows in fig. 1 and the cloud director that fig. 2 shows to direct a match, camera shoots the goal all the way, camera shooting spectator all the way, the cloud director of prior art carries out the code compression respectively with the signal of two way cameras and transmits to the cloud director platform and makes, the video signal delay of coding, transmission, decoding, preparation is about 2 seconds, when the cloud director platform carries out the camera lens switching of two way cameras, the picture that camera shooting of one way is the picture of goal, the picture that camera shooting of another way is the picture that spectator sat down. The utility model discloses a video signal of two way cameras is coded to the on-cloud director device that fig. 1 shows, the encoder is 150ms to the video signal of two way cameras and is sent the time delay that second cloud director platform was made, when second cloud director platform carried out the camera lens of two way cameras and switches, the picture of camera shooting all the way is the picture of dribbling, the picture of another way camera shooting is spectator's cheering picture, the continuity of camera lens switching has been guaranteed, first cloud director platform is made first way coded signal according to the preparation information of second way coded signal of second cloud director platform, output 4k code stream, the director of high quality signal has been guaranteed. The utility model discloses a video signal of two way cameras of on-cloud director encoder of fig. 2 is encoded and is sent local director platform to carry out the time delay of making is 80ms, when local director platform carries out the camera lens of two way cameras and switches, the picture of camera shooting all the way is the picture of dribbling, the picture of another way camera shooting is spectator's picture of cheering, the continuity of camera lens switching has been guaranteed, first cloud director platform is made first way coded signal according to the preparation information of second way coded signal of second cloud director platform, output 4k code stream, the director of high quality signal has been guaranteed.
The utility model discloses a director device both had satisfied the low time delay (< 200 ms) requirement of director accent machine on the cloud, can ensure signal output's quality again (4K, contain HDR, BT2020 colour gamut, >40 Mbps).
The double-circuit coded signal of encoder output high quality and low time delay of instructor in broadcasting device on the cloud has guaranteed the timely high efficiency of the real-time instructor in broadcasting of video preparation, has guaranteed high quality signal output again simultaneously.
The low-delay coded signals output by the encoder are previewed in real time, the requirements on the quality of videos are not high through real-time broadcasting guide and manufacturing, the requirement on delay time is extremely high, multi-machine-bit frame synchronization of video manufacturing can be guaranteed through low-delay cloud manufacturing of the second cloud broadcasting guide station, on-site machine positions can be commanded in real time according to low-delay pictures, and the manufacturing process is not influenced by delay.
The high-quality signal delay of encoder output is big, but first cloud director platform video production quality satisfies high standard, and real-time production and high-quality video output are made possible to the double-circuit coded signal of encoder.
The director and the like use the local director station or the second cloud director station without additional operation, and the first cloud director station and the second cloud director station or the first cloud director station and the local director station automatically and synchronously switch low-delay and high-quality signals without manual intervention.
The utility model discloses director device can use most sports events on the cloud, and the business scene of low time delay director needs high quality output, low time delay direct broadcast etc. in concert, meeting are live. The method can meet the functional requirements of multi-station frame synchronization, on-site station scheduling and the like, can replace the rebroadcasting vehicle for use, can be manufactured on site, is high in cost, can only be manufactured by on-site personnel on the pictures shot by the camera, is low in cloud broadcasting guide cost, and can be used for manufacturing and guiding the pictures shot by the camera at any place.
While the foregoing disclosure shows illustrative embodiments of the invention, it should be noted that various changes and modifications could be made herein without departing from the scope of the invention as defined by the appended claims. Furthermore, although elements of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Claims (10)
1. The cloud broadcasting directing device is characterized by comprising an encoder, a first cloud broadcasting directing table and a second cloud broadcasting directing table, wherein the encoder receives video signals of each camera, encodes the video signals with different resolutions and code rates, and then outputs a first path of coded signals and a second path of coded signals respectively, the time delay of the second path of coded signals is smaller than that of the first path of coded signals, the resolution of the second path of coded signals is lower than that of the first path of coded signals, the first path of coded signals are transmitted to the first cloud broadcasting directing table, the second path of coded signals are transmitted to the second cloud broadcasting directing table, the second cloud broadcasting directing table conducts broadcasting directing on the second path of coded signals, corresponding production information is generated and transmitted to the first cloud broadcasting directing table, and the first cloud broadcasting directing table produces the first path of coded signals according to the production information.
2. The on-cloud director device of claim 1, further comprising a synchronizer for performing clock timing on the first encoded signal and the second encoded signal output by the encoder.
3. The on-cloud director device according to claim 2, wherein the encoder comprises a first encoder and a second encoder, the first encoder and the second encoder receive video signals of the same camera and encode the video signals respectively, the first encoder outputs the first path of encoded signals, and the second encoder outputs the second path of encoded signals.
4. The on-cloud director device of claim 3, wherein the synchronizer clocks the first encoder and the second encoder simultaneously, and uses the signals as frame synchronization information of the first encoded signal and the second encoded signal.
5. The on-cloud director device of claim 2, wherein said synchronizer comprises one or more of a GPS and NTP server.
6. The on-cloud director device of claim 1, wherein the delay time of the second encoded signal is less than <200 ms.
7. The on-cloud director device of claim 1, wherein the second cloud director station sends a control signal to the camera for camera lens switching.
8. The on-cloud broadcasting guide device is characterized by comprising an encoder, a first cloud broadcasting guide platform and a local broadcasting guide platform, wherein the encoder receives video signals of each camera, carries out coding with different resolutions and code rates and then outputs a first path of coding signal and a second path of coding signal respectively, the time delay of the second path of coding signal is smaller than that of the first path of coding signal, the resolution of the second path of coding signal is lower than that of the first path of coding signal, the first path of coding signal is transmitted to the first cloud broadcasting guide platform, the second path of coding signal is transmitted to the local broadcasting guide platform through a network, the local broadcasting guide platform carries out broadcasting guide manufacturing on the second path of coding signal, corresponding manufacturing information is generated and transmitted to the first cloud broadcasting guide platform, and the first cloud broadcasting guide platform manufactures the first path of coding signal according to the manufacturing information.
9. The on-cloud director device of claim 8, further comprising a synchronizer for performing clock timing on the first encoded signal and the second encoded signal output by the encoder.
10. The on-cloud director device according to claim 8, wherein the encoder comprises a first encoder and a second encoder, and the first encoder and the second encoder receive video signals of the same camera and respectively encode the video signals, and respectively output a first path of encoded signals and a second path of encoded signals.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114727126A (en) * | 2022-04-12 | 2022-07-08 | 杭州当虹科技股份有限公司 | Implementation method for applying image stitching to multi-machine-position VR (virtual reality) broadcasting-directing station |
| CN114793287A (en) * | 2022-06-22 | 2022-07-26 | 中国传媒大学 | Audio and video content monitoring and broadcasting method based on two-way broadcasting guide |
| CN114866786A (en) * | 2022-04-27 | 2022-08-05 | 中央广播电视总台 | Television signal manufacturing method, system, equipment, chip and storage medium |
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2021
- 2021-03-02 CN CN202120444423.8U patent/CN213094282U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114727126A (en) * | 2022-04-12 | 2022-07-08 | 杭州当虹科技股份有限公司 | Implementation method for applying image stitching to multi-machine-position VR (virtual reality) broadcasting-directing station |
| CN114727126B (en) * | 2022-04-12 | 2023-09-19 | 杭州当虹科技股份有限公司 | Implementation method for applying image stitching to multi-machine-position VR (virtual reality) guide broadcasting station |
| CN114866786A (en) * | 2022-04-27 | 2022-08-05 | 中央广播电视总台 | Television signal manufacturing method, system, equipment, chip and storage medium |
| CN114793287A (en) * | 2022-06-22 | 2022-07-26 | 中国传媒大学 | Audio and video content monitoring and broadcasting method based on two-way broadcasting guide |
| CN114793287B (en) * | 2022-06-22 | 2022-09-27 | 中国传媒大学 | Audio and video content monitoring and broadcasting method based on two-way broadcasting guide |
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