CN113660529A - Video splicing, encoding and decoding method and device based on Tile encoding - Google Patents
Video splicing, encoding and decoding method and device based on Tile encoding Download PDFInfo
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- CN113660529A CN113660529A CN202110812984.3A CN202110812984A CN113660529A CN 113660529 A CN113660529 A CN 113660529A CN 202110812984 A CN202110812984 A CN 202110812984A CN 113660529 A CN113660529 A CN 113660529A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
Abstract
The invention provides a video splicing, encoding and decoding method and device based on Tile encoding, wherein the video splicing method comprises the following steps: receiving a plurality of paths of video streams to be spliced based on Tile coding; directly synthesizing and splicing the received multiple paths of video streams to be spliced to generate a synthesized video stream; and outputting the composite video stream. When the video splicing is carried out, the calculation operations such as decoding, encoding and the like do not need to be carried out on the video data, so that the calculation complexity in the video splicing is reduced, the time consumption of the video splicing is shortened, and the video splicing efficiency is improved. The present invention can overcome the video size limitation of some video encoding software, hardware encoders by segmenting the entire source image, which is larger in size, into portions. They are encoded separately using multiple encoder instances, and then finally the output of all encoder instances is stitched back into a single stream using the video stitching method described above. In addition, the invention can also be applied to the condition that the decoding resources of the receiving end are limited.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a video splicing, encoding and decoding method and device based on Tile encoding.
Background
In the fields of video conferencing, gaming, live video, digital tv, etc., it is often necessary to merge two or more videos into one video, spatially merge/stitch all incoming video streams, and then transmit them to the client.
At present, in a method for fusing a plurality of video streams in the market, operations such as decoding, image deformation, fusion, re-encoding and the like are involved, the required computational complexity is very high, great delay is caused, and the video processing efficiency is influenced.
Disclosure of Invention
The invention provides a video splicing, encoding and decoding method and device based on Tile encoding, and aims to solve the technical problem of how to improve the video data processing efficiency.
The video splicing method based on Tile coding according to the embodiment of the invention comprises:
receiving a plurality of paths of video streams to be spliced based on Tile coding;
directly synthesizing and splicing the received multiple paths of video streams to be spliced to generate a synthesized video stream;
and outputting the composite video stream.
According to the video splicing method based on Tile coding, the video data does not need to be decoded, coded and other calculation operations when video splicing is carried out, the calculation complexity in video splicing is reduced, the time consumption of video splicing is shortened, and the video splicing efficiency is improved.
According to some embodiments of the present invention, before the multiple video streams to be spliced are directly subjected to composite splicing, the method further comprises:
and synthesizing and splicing the plurality of paths of video streams on the premise of judging that preset conditions are met, wherein the preset conditions at least comprise one of the following conditions:
the video formats of the multiple paths of video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the plurality of paths of video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the plurality of paths of video streams, the video content is not modified.
In some embodiments of the present invention, the directly performing composite splicing on the received multiple video streams to be spliced includes:
and adjusting and arranging each frame of the multi-path video stream to be spliced according to a preset configuration rule, adjusting a frame header, and generating the synthesized and spliced synthesized video stream.
The video splicing device based on Tile coding according to the embodiment of the present invention comprises:
the receiving module is used for receiving a plurality of paths of video streams to be spliced based on Tile coding;
the splicing module is used for directly synthesizing and splicing the received multipath video streams to be spliced to generate a synthesized video stream;
and the output module is used for outputting the synthesized video stream.
According to the video splicing device based on Tile coding, the video data does not need to be decoded, coded and other calculation operations when the video is spliced, so that the calculation complexity in video splicing is reduced, the time consumption of video splicing is shortened, and the video splicing efficiency is improved.
According to some embodiments of the invention, the apparatus further comprises: the condition judgment module is used for judging whether preset conditions are met, and synthesizing and splicing the multiple paths of video streams through the splicing module on the premise that the preset conditions are met, wherein the preset conditions at least comprise one of the following conditions:
the video formats of the multiple paths of video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the plurality of paths of video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the plurality of paths of video streams, the video content is not modified.
In some embodiments of the present invention, the splicing module is specifically configured to:
and adjusting and arranging each frame of the multi-path video stream to be spliced according to a preset configuration rule, adjusting a frame header, and generating the synthesized and spliced synthesized video stream.
The video coding method based on Tile coding according to the embodiment of the present invention comprises:
dividing the video stream with the video size exceeding a preset value into a plurality of single video streams;
respectively encoding each single video stream to generate a corresponding video stream to be synthesized;
and splicing a plurality of video streams to be synthesized into a synthesized video stream by adopting the video splicing method based on the Tile coding.
The video coding method based on Tile coding provided by the invention can overcome the limitation of some video coding software and hardware encoders on the video size by dividing the whole source image with larger size into a plurality of parts. They are encoded separately using multiple encoder instances, and then finally the output of all encoder instances is stitched back into a single stream using the video stitching method described above.
The video coding device based on Tile coding according to the embodiment of the present invention comprises:
the segmentation module is used for segmenting the video stream with the video size exceeding a preset value into a plurality of single video streams;
the encoding module is used for encoding each single video stream respectively to generate corresponding video streams to be synthesized;
the video splicing device is the video splicing device based on the Tile coding and is used for splicing a plurality of video streams to be synthesized into a synthesized video stream.
The video coding device based on Tile coding provided by the invention can divide the whole source image with larger size into a plurality of parts through the dividing module to overcome the limitation of some video coding software and hardware encoders to the video size. The encoding module uses multiple encoder instances to encode them separately, and then finally stitches the output of all encoder instances back into a single stream using the video stitching device described above.
The video decoding method based on Tile coding according to the embodiment of the invention comprises:
splicing a plurality of paths of videos to be spliced into a composite video stream by adopting the video splicing method based on Tile coding;
and decoding the composite video stream and outputting the composite video stream.
The video decoding method based on Tile coding can be applied to the condition that the decoding resources of the receiving end are limited. Assume that there is only one decoder at the receiving end and that the client needs to transmit multiple video streams. Such as VR applications that need to transmit multiple views or displaying video streams from multiple cameras in a video surveillance process. In this case, since only one decoder is available at the receiving end, the video splicing method of the present invention can be used to stitch together multiple views and send them to a single decoder. After successful decoding, they can be split back into multiple parts.
The video decoding device based on Tile coding according to the embodiment of the present invention comprises:
the video splicing device is the video splicing device and is used for splicing a plurality of paths of videos to be spliced into a composite video stream;
and the decoding module is used for decoding the synthesized video stream and then outputting the decoded synthesized video stream.
The video decoding method based on Tile coding can be applied to the condition that the decoding resources of the receiving end are limited. Assume that there is only one decoder at the receiving end and that the client needs to transmit multiple video streams. Such as VR applications that need to transmit multiple views or displaying video streams from multiple cameras in a video surveillance process. In this case, since only one decoder is available at the receiving end, the video splicing apparatus of the present invention can be used to stitch together a plurality of views and transmit to a single decoder. After the decoding modules successfully decode, they can be split back into multiple parts.
Drawings
FIG. 1 is a flow chart of a video stream splicing method in the prior art;
FIG. 2 is a schematic diagram of a video stream splicing method based on Tile coding according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for splicing video streams based on Tile coding according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a video splicing apparatus based on Tile coding according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a video encoding method based on Tile encoding according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for video encoding based on Tile encoding according to an embodiment of the present invention;
FIG. 7 is a block diagram of an apparatus for encoding video based on Tile encoding according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a method for decoding video based on Tile encoding according to an embodiment of the present invention;
FIG. 9 is a flowchart of a method for decoding video based on Tile encoding according to an embodiment of the present invention;
FIG. 10 is a block diagram of a video decoding apparatus based on Tile encoding according to an embodiment of the present invention.
Reference numerals:
the video splicing apparatus 100 is provided with a video splicing device,
a receiving module 110, a splicing module 120, an output module 130, a condition determining module 140,
the video encoding apparatus 200 is provided with a video encoding device,
the number of operations performed by the segmentation module 210, the encoding module 220,
the video decoding apparatus 300 is provided with a video decoding apparatus,
a decoding module 310.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
The description of the method flow in the present specification and the steps of the flow chart in the drawings of the present specification are not necessarily strictly performed by the step numbers, and the execution order of the method steps may be changed. Moreover, certain steps may be omitted, multiple steps may be combined into one step execution, and/or a step may be broken down into multiple step executions.
As shown in fig. 1, the typical existing solution for multiple video stream fusion usually accomplishes this task by the following steps:
a1, decoding all the single video streams (to YUV frame buffer);
a2, forming a new YUV frame buffer by operating the decoded output in a specified/configured order;
a3, encoding the final YUV buffer created to generate a single output stream.
As shown in fig. 1, in the existing video splicing technology, the whole process requires multiple decoding, image deformation, fusion, and re-encoding, the required computational complexity is high, and a large delay is also caused.
In order to solve the above problems in the prior art and improve the processing efficiency of video data, the present invention provides a video splicing, encoding, and decoding method and apparatus.
As shown in fig. 2 and fig. 3, a video splicing method based on Tile coding according to an embodiment of the present invention includes:
s110, receiving a plurality of paths of video streams to be spliced based on Tile coding;
s120, directly synthesizing and splicing the received multiple paths of video streams to be spliced to generate a synthesized video stream;
and S130, outputting the composite video stream.
It should be noted that, on the basis of Tile coding, the invention can change the slice header of the code stream to convert the image frames of different code streams into different Tiles in the same code stream, thereby realizing the code stream splicing without decoding and re-coding. For example, some video coding standards such as AV1 and HEVC support Tile-based coding, but not for video coding standards such as AVC.
According to the video splicing method based on Tile coding, the video data does not need to be decoded, coded and other calculation operations when video splicing is carried out, the calculation complexity in video splicing is reduced, the time consumption of video splicing is shortened, and the video splicing efficiency is improved.
According to some embodiments of the present invention, before the multiple video streams to be spliced are directly subjected to composite splicing, the method further comprises:
and synthesizing and splicing the multi-channel video streams on the premise of judging that the preset conditions are met, wherein the preset conditions at least comprise one of the following conditions:
the video formats of the multi-channel video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the multi-path video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the multi-path video streams, the video content is not modified.
It should be noted that the video splicing method based on Tile coding provided by the present invention is not suitable for any existing video compression standard, and when the video splicing method of the present invention is adopted to perform video splicing, certain conditions need to be satisfied. The following are some of the limitations that may prevent the practice of the invention:
the codec required for output is different from the input codec, i.e. the video stream to be synthesized and the synthesized video stream should keep the same format;
the input size needs to be adjusted before fusion, namely, compression adjustment on the video size is not involved in the video stream synthesis process;
some modification of certain inputs, such as video content, is required;
in addition to the above conditions, in order to ensure the highest processing efficiency of the video splicing method based on Tile coding proposed by the present invention, there may be other requirements on the above conditions,
the input coded stream uses motion vectors pointing outside the picture boundaries;
the input coded stream uses in-loop filtering across slice boundaries.
In some embodiments of the present invention, the directly performing composite splicing on the received multiple video streams to be spliced includes:
and adjusting and arranging each frame of the multi-channel video stream to be spliced according to a preset configuration rule, adjusting the frame head, and generating a synthesized and spliced synthesized video stream.
It should be noted that by adjusting the appropriate frame header (and possibly other stream syntax elements), the overall consistency of multi-frame fusion can be satisfied while maintaining compliance with the required video compression standard.
As shown in fig. 4, a video splicing apparatus 100 based on Tile coding according to an embodiment of the present invention includes: a receiving module 110, a splicing module 120 and an output module 130.
The receiving module 110 is configured to receive multiple paths of video streams to be spliced based on Tile coding, the splicing module 120 is configured to directly synthesize and splice the received multiple paths of video streams to be spliced to generate a synthesized video stream, and the output module 130 is configured to output the synthesized video stream.
According to the video splicing device 100 based on Tile coding provided by the embodiment of the invention, when video splicing is performed, calculation operations such as decoding and coding are not required to be performed on video data, so that the calculation complexity in video splicing is reduced, the time consumption of video splicing is shortened, and the video splicing efficiency is improved.
According to some embodiments of the present invention, as shown in fig. 4, the video stitching device 100 further comprises: the condition determining module 140 is configured to determine whether a preset condition is met, and perform composite splicing on the multiple video streams through the splicing module 120 on the premise that the preset condition is met, where the preset condition at least includes one of:
the video formats of the multi-channel video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the multi-path video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the multi-path video streams, the video content is not modified.
It should be noted that the video splicing method based on Tile coding provided by the present invention is not suitable for any existing video compression standard, and when the video splicing method based on Tile coding provided by the present invention is adopted to perform video splicing, certain conditions need to be satisfied. The following are some of the limitations that may prevent the practice of the invention:
the codec required for output is different from the input codec, i.e. the video stream to be synthesized and the synthesized video stream should keep the same format;
the input size needs to be adjusted before fusion, namely, compression adjustment on the video size is not involved in the video stream synthesis process;
some modification of certain inputs, such as video content, is required;
in addition to the above conditions, in order to ensure the highest processing efficiency of the video splicing method based on Tile coding proposed by the present invention, there may be other requirements on the above conditions,
the input coded stream uses motion vectors pointing outside the picture boundaries;
the input coded stream uses in-loop filtering across slice boundaries.
In some embodiments of the present invention, the splicing module 120 is specifically configured to:
and adjusting and arranging each frame of the multi-channel video stream to be spliced according to a preset configuration rule, adjusting the frame head, and generating a synthesized and spliced synthesized video stream.
It should be noted that by adjusting the appropriate frame header (and possibly other stream syntax elements), the overall consistency of multi-frame fusion can be satisfied while maintaining compliance with the required video compression standard.
As shown in fig. 5 and 6, a video encoding method based on Tile encoding according to an embodiment of the present invention includes:
s210, dividing the video stream with the video size exceeding a preset value into a plurality of single video streams;
s220, coding each single video stream respectively to generate corresponding video streams to be synthesized;
and S230, splicing the plurality of video streams to be synthesized into a synthesized video stream by adopting the video splicing method based on Tile coding.
The video coding method based on Tile coding provided by the invention can overcome the limitation of some video coding software and hardware encoders on the video size by dividing the whole source image with larger size into a plurality of parts. They are encoded separately using multiple encoder instances, and then finally the output of all encoder instances is stitched back into a single stream using the video stitching method described above.
As shown in fig. 7, the video encoding apparatus 200 based on Tile encoding according to the embodiment of the present invention includes: a segmentation module 210, an encoding module 220, and a video splicing apparatus 100.
The dividing module 210 is configured to divide a video stream with a video size exceeding a preset value into a plurality of single video streams;
the encoding module 220 is configured to encode each single video stream respectively to generate a corresponding video stream to be synthesized;
the video splicing apparatus 100 is the video splicing apparatus 100 based on Tile coding as described above, and is configured to splice a plurality of video streams to be synthesized into a synthesized video stream.
The video encoding apparatus 200 provided by the present invention can overcome the limitation of some video encoding software and hardware encoders on the video size by dividing the whole source image with larger size into a plurality of parts through the dividing module 210. The encoding module 220 encodes them separately using multiple encoder instances and then finally stitches the output of all encoder instances back into a single stream using the video splicing apparatus 100 described above.
As shown in fig. 8 and 9, a video decoding method based on Tile coding according to an embodiment of the present invention includes:
s310, splicing a plurality of paths of videos to be spliced into a composite video stream by adopting the video splicing method based on Tile coding;
and S320, decoding the synthesized video stream and outputting the decoded video stream.
The video decoding method based on Tile coding can be applied to the condition that the decoding resources of the receiving end are limited. Assume that there is only one decoder at the receiving end and that the client needs to transmit multiple video streams. Such as VR applications that need to transmit multiple views or displaying video streams from multiple cameras in a video surveillance process. In this case, since only one decoder is available at the receiving end, the video splicing method of the present invention can be used to stitch together multiple views and send them to a single decoder. After successful decoding, they can be split back into multiple parts.
As shown in fig. 10, the video decoding apparatus 300 according to the embodiment of the present invention includes: the video splicing apparatus 100 and the decoding module 310.
The video splicing device 100, the video splicing device 100 being the video splicing device 100 based on Tile coding as described above, is configured to splice multiple channels of videos to be spliced into a composite video stream;
the decoding module 310 is configured to decode the composite video stream and output the decoded composite video stream.
The video decoding device 300 based on Tile coding provided by the present invention can be applied to the situation that the decoding resources of the receiving end are limited. Assume that there is only one decoder at the receiving end and that the client needs to transmit multiple video streams. Such as VR applications that need to transmit multiple views or displaying video streams from multiple cameras in a video surveillance process. In this case, since only one decoder is available at the receiving end, the video splicing apparatus 100 of the present invention can be employed to stitch together a plurality of views and transmit to a single decoder. After the decoding module 310 decodes successfully, they can be split back into multiple parts.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.
Claims (10)
1. A video splicing method based on Tile coding is characterized by comprising the following steps:
receiving a plurality of paths of video streams to be spliced based on Tile coding;
directly synthesizing and splicing the received multiple paths of video streams to be spliced to generate a synthesized video stream;
and outputting the composite video stream.
2. The Tile coding-based video splicing method according to claim 1, wherein before directly performing composite splicing on the multiple video streams to be spliced, the method further comprises:
and synthesizing and splicing the plurality of paths of video streams on the premise of judging that preset conditions are met, wherein the preset conditions at least comprise one of the following conditions:
the video formats of the multiple paths of video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the plurality of paths of video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the plurality of paths of video streams, the video content is not modified.
3. The Tile coding-based video splicing method according to claim 1, wherein the directly performing composite splicing on the received multiple video streams to be spliced comprises:
and adjusting and arranging each frame of the multi-path video stream to be spliced according to a preset configuration rule, adjusting a frame header, and generating the synthesized and spliced synthesized video stream.
4. A video splicing apparatus based on Tile coding, comprising:
the receiving module is used for receiving a plurality of paths of video streams to be spliced based on Tile coding;
the splicing module is used for directly synthesizing and splicing the received multipath video streams to be spliced to generate a synthesized video stream;
and the output module is used for outputting the synthesized video stream.
5. The Tile coding-based video splicing apparatus according to claim 4, wherein the apparatus further comprises: the condition judgment module is used for judging whether preset conditions are met, and synthesizing and splicing the multiple paths of video streams through the splicing module on the premise that the preset conditions are met, wherein the preset conditions at least comprise one of the following conditions:
the video formats of the multiple paths of video streams after synthesis and splicing are consistent;
in the process of synthesizing and splicing the plurality of paths of video streams, the size of the video is not changed;
and in the process of synthesizing and splicing the plurality of paths of video streams, the video content is not modified.
6. The Tile coding-based video splicing apparatus according to claim 4, wherein the splicing module is specifically configured to:
and adjusting and arranging each frame of the multi-path video stream to be spliced according to a preset configuration rule, adjusting a frame header, and generating the synthesized and spliced synthesized video stream.
7. A video coding method based on Tile coding is characterized by comprising the following steps:
dividing the video stream with the video size exceeding a preset value into a plurality of single video streams;
respectively encoding each single video stream to generate a corresponding video stream to be synthesized;
splicing the plurality of video streams to be synthesized into a synthesized video stream by using the Tile coding-based video splicing method according to any one of claims 1-3.
8. An apparatus for video encoding based on Tile encoding, comprising:
the segmentation module is used for segmenting the video stream with the video size exceeding a preset value into a plurality of single video streams;
the encoding module is used for encoding each single video stream respectively to generate corresponding video streams to be synthesized;
video splicing means, being the video splicing means based on Tile coding according to any of claims 4-6, for splicing a plurality of said video streams to be composed into a composed video stream.
9. A video decoding method based on Tile coding is characterized by comprising the following steps:
splicing a plurality of paths of videos to be spliced into a composite video stream by adopting the video splicing method based on Tile coding according to any one of claims 1-3;
and decoding the composite video stream and outputting the composite video stream.
10. A video decoding apparatus based on Tile coding, comprising:
the video splicing device based on Tile coding according to any of claims 4-6, used for splicing multiple video to be spliced into a composite video stream;
and the decoding module is used for decoding the synthesized video stream and then outputting the decoded synthesized video stream.
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| CN110035331A (en) * | 2018-01-12 | 2019-07-19 | 华为技术有限公司 | A kind of processing method and processing device of media information |
| WO2020228482A1 (en) * | 2019-05-13 | 2020-11-19 | 华为技术有限公司 | Video processing method, apparatus and system |
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| CN103907350A (en) * | 2012-09-29 | 2014-07-02 | 华为技术有限公司 | Method, apparatus and system for encoding and decoding video |
| CN109587478A (en) * | 2017-09-29 | 2019-04-05 | 华为技术有限公司 | A kind of processing method and processing device of media information |
| CN110035331A (en) * | 2018-01-12 | 2019-07-19 | 华为技术有限公司 | A kind of processing method and processing device of media information |
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