CN102833543A - Device and method for detecting video coding format of video and audio media files - Google Patents
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Abstract
The invention relates to a device and a method for detecting a video coding format of video and audio media files. The device comprises a detecting task acquisition unit connected with a file opening unit, the file opening unit is connected with a video and audio basic parameter detecting unit and an information output unit, the video and audio basic parameter detecting unit is connected with an Mpeg-2 (moving picture experts group-2) basic flow detecting unit and the information output unit, and the Mpeg-2 basic flow detecting unit is connected with the information output unit. By the method and the device, the video and audio media files to be detected can be subjected to grammar or semantic layering detection defined in each layered structure of Mpeg-2 video streaming, and detection is sequentially performed from a top layer, a sequence header, a picture group layer, a picture layer, a Slice layer and a macro block layer; and the execution state and the execution progress of coding format compliance detection can be visually obtained, and error level and output error information are displayed after the coding format compliance detection is completed. Besides, broadcasting accidents due to the fact that the video and audio media files cannot be decoded by a video server can be avoided, and safety of broadcasting is guaranteed.
Description
Technical field
The present invention relates to a kind of audio media files video code model checkout gear and method of looking, is a kind of apparatus and method of computer network transmission, is a kind of checkout gear of looking audio media files and method that is used for transmission through network.
Background technology
Along with the record and broadcast system is tending towards omnidistance documentation gradually, radio and television more and more manyly are looked audio media files from what Digital Media or data link had compressed.After video/audio is compressed into file, can't know it is to adopt which kind of file encapsulation format, video code model intuitively, can't learn also whether its coded format meets the relevant specification requirement.Therefore should be divided into three levels to the skill of looking audio media files is careful, i.e. file encapsulation format compliance, video code model compliance, compression video and audio frequency technology applications parameter.Technological audit method commonly used at present all is decoded video and audio frequency technology applications parameter to be carried out skill examine, and main purpose is to guarantee to look audio media files to reach the requirement that safety is broadcasted, and does not break, and does not broadcast Hei Chang and quiet frame etc., guarantees the technical quality that program broadcasts.But, if the encapsulation format of file and video coding mode do not conform to standard, can cause video server decoding failure equally, cause the broadcast accident.Only do technological audit and can't satisfy the broadcast business development for the demand of looking audio media files high security, high reliability to the video and audio frequency technology applications parameter.
Summary of the invention
For solving prior art problems, the present invention proposes a kind of audio media files video code model checkout gear and method of looking.The coded system that audio media files mainly adopts MPEG-2 of looking owing to the field of broadcast televisions use; So described apparatus and method are looked audio media files to what field of broadcast televisions used, carry out the grammer or the semantic hierarchical detection that define in each hierarchy of Mpeg-2 video data stream.Described apparatus and method comprise: look detection of audio frequency basic parameter and video-frequency basic flow legitimacy and detect.For the detection of basic stream, only, do not comprise detection to audio frequency to the video of Mpeg-2 coding.
The objective of the invention is to realize like this: a kind of audio media files coded format compliance checkout gear of looking; Comprise: detect the task acquiring unit; Described detection task acquiring unit is connected with the File Open unit; Described File Open unit with look audio frequency basic parameter detecting unit and be connected with information output unit; The described audio frequency basic parameter detecting unit of looking flows detecting unit basically with Mpeg-2 and is connected with information output unit; Described Mpeg-2 flows detecting unit basically and is connected with information output unit, and described Mpeg-2 flows catenation sequence head detection successively in the detecting unit, the detection of image sets layer, image layers detection, the detection of Slice layer, five modules of macroblock layer detection basically.
A kind of use said apparatus look audio media files coded format compliance detection method, the step of said method is following:
Obtain the step of detection task: be used for described detection task acquiring unit and obtain the detection mission bit stream, detect mission bit stream and comprise filename and the store path of looking audio media files to be detected at database;
Look the step of audio media files decoding: be used for described File Open unit and open the audio media files of looking to be detected that detects the mission bit stream appointment through decoder; The audio media files of looking to be detected to opening differentiates whether video code model is the Mpeg-2 form; If to open failure or video code model be not the Mpeg-2 form then get into " detection information output step ", if to open success and video code model be the Mpeg-2 form then get into next step;
Look the step that the audio frequency basic parameter detects: be used for the described audio frequency basic parameter detecting unit of looking elementary video parameter, elementary audio parameter of looking audio media files to be detected, the legitimacy of looking the audio frequency relevance are detected; If it is defective then get into " step of detection information output " to look the audio frequency basic parameter, detects qualified then get into next step if look the audio frequency basic parameter;
Mpeg-2 flows the step of detection basically: be used for described Mpeg-2 and flow detecting unit basically and the Mpeg-2 that looks audio media files is flowed basically detect, the project of detection comprises: sequence head, image sets layer, image layers, Slice layer, macroblock layer;
The step of detection information output: the testing result that be used for that described information output unit is collected the File Open unit, looked audio frequency basic parameter detecting unit, Mpeg-2 flows detecting unit basically and write down is also exported testing result.
The beneficial effect that the present invention produces is: method and apparatus of the present invention can be to the audio media files of exporting in each link manufacturing-broadcasting system of field of broadcast televisions of looking; Carry out the grammer or the semantic hierarchical detection that define in each hierarchy of Mpeg-2 video data stream, begin to detect successively according to the order of sequence head, image sets layer, image layers, Slice layer, macroblock layer by top layer.Can obtain executing state and implementation progress that the coded format compliance detects intuitively, after the coded format compliance detects and finishes, show whether wrong and error level, output error message.Whether the present invention can judge in advance to wait to broadcast before broadcasting and look audio media files and have and do not conform to the rule mistake aspect the coded format; If not conforming to rule can carry out sending broadcast again after the processed according to output information; Avoid not conforming to the broadcast accident that standard can't be caused by video server decoding because of looking the audio media files coded format, broadcast ensures safety.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the structural representation of inventive embodiments one said device;
Fig. 2 is the flow chart of inventive embodiments two said methods.
Embodiment
Embodiment one:
Present embodiment is a kind of audio media files video code model checkout gear of looking, and is as shown in Figure 1.Present embodiment comprises: detect the task acquiring unit; Described detection task acquiring unit is connected with the File Open unit; Described File Open unit with look audio frequency basic parameter detecting unit and be connected with information output unit; The described audio frequency basic parameter detecting unit of looking flows detecting unit basically with Mpeg-2 and is connected with information output unit; Described Mpeg-2 flows detecting unit basically and is connected with information output unit, and described Mpeg-2 flows catenation sequence head detection successively in the detecting unit, the detection of image sets layer, image layers detection, the detection of Slice layer, five modules of macroblock layer detection basically.
Present embodiment is the part of technological audit system.The technological audit system not only examines the coded format of looking audio media files, also detects the other technologies performance of looking audio media files, as: encapsulation format, quality of image or the like.
The described compliance of looking the audio media files coded format of present embodiment detects the audio media files of looking to be detected that is primarily aimed at the Mpeg-2 coded format and detects, and does not support the detection of looking audio media files to non-Mpeg-2 coded format.Detecting Mpeg-2 document No. form need read and resolve whole file, and video/audio is wherein decoded.
The technological audit system is the network system of a service end and a plurality of clients, can carry out a plurality of technological audits of looking audio media files simultaneously, supports the multithreading examination for an examination task.In the process of technological audit, client and service end keep continuous message feedback, give service end with the state of coded format compliance detection, the feedback information of progress, and this message feedback is two-way.
The major part of the described device of present embodiment is installed in the client of technological audit system, and said device is got in touch exchange message through file acquiring unit and information output unit and service end.
Described detection task acquiring unit is from the database of technological audit system, to obtain the detection mission bit stream; Detect mission bit stream and comprise that detection to be detected looks the filename and the store path of audio media files; Described database can be all kinds, comprises Oracle, DB2, SQL 2005 etc.
The audio media files of looking to be detected that detects appointment in the mission bit stream is opened in described File Open unit; Judge when opening file whether this looks the audio media files video code model is the Mpeg-2 form; Detect if then proceed; If to be detected to look the video code model that audio media files opens failure or look audio media files be the extended formatting beyond the Mpeg-2 coding, like DV25, H264, DVHD etc., then directly with this information output.
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Put it briefly, MPEG-2 has utilized spatial coherence and the temporal correlation in the image to carry out data compression.One two field picture is made up of some pixels, and there is certain relation in each pixel some pixel common and around its on brightness and colourity, and this relation is called spatial coherence; Wherein also there is certain relation in a sequence between the two field picture of front and back by the plurality of continuous image construction, and this relation is called temporal correlation.These two kinds of correlations make and have bulk redundancy information in the image.The MPEG-2 coding is exactly in order to remove these redundant informations, only keeps a small amount of irrelevant information to make things convenient for storage transmission.Utilize these irrelevant information at receiving terminal,, just can under the prerequisite that guarantees certain picture quality, recover original image according to certain decoding algorithm.Decoder receives the MEPG-2 video data, at first carries out variable length decoding, and counter-scanning recovers the two-dimensional array of each 8x8 then, then these arrays is carried out inverse quantization, and anti-dct transform passes through motion compensation again, just generates the pixel data of decoding.
The process that video-frequency basic flow is detected is exactly in order to guarantee that decode procedure can correctly decode, and the wrong pixel data errors that all can cause decoder to obtain appears in above-mentioned each link, thus the quality of the image that influence recovers.
The described test item of looking audio frequency basic parameter detecting unit comprises: Video Detection, audio detection, the detection of video and audio frequency correlation.Whether video basic parameter detection signal standard, coded format, code check, class and parameters such as level, frame per second, gop structure, resolution, color format and AFD value meet specification requirement; Comprising: coded format meets Mpeg-2 IBP/I form, and code check is in the 6-300Mbps scope, and class is Mpml, hphl, 422phl or 422pml with level; Frame per second meets 25/29.97; Resolution meets the 1920X1080/720X576 standard, and length-width ratio is 16:9/4:3, and color format meets 422/420 etc.The audio frequency basic parameter detects parameters such as audio format, number of channels, sample rate and quantified precision, and for example quantified precision will meet 16,20 or 24 and compare top grade.Video and audio frequency correlation detect mainly carries out legitimacy to the video/audio relevance and detects, and content comprises looks audio media files length and whether video aligns.
Described Mpeg-2 flows detecting unit basically, and mainly the classification grammer based on video code flow consistency detection part in the middle of the ISO/IEC 13818-4 standard totally detects.ISO/IEC 13818-1,2,3 standards have been specified audiovisual information coded representation and a multiplet; To different application the international standard of maximum appropriate degree and flexibility is provided, and ISO/IEC 13818-4 standard is exactly to be used for detection validation code stream and decoder whether to meet the part of ISO/IEC 13818-1,2,3 code requirements.The code stream consistency detection is meant: for a mpeg video encoder, the arithmetic precision of decode procedure that is used for producing the coded bit stream of encoder should meet ISO/IEC13818-2 specified accuracy fully.The video spatial scalable grammer is overall to be detected is the detection of carrying out to the grammer that defines in each hierarchy of Mpeg-2 video data stream or semantic classification, and hierarchy to be detected begins to be followed successively by sequence head, image sets layer, image layers, Slice layer, macroblock layer by top layer.
Embodiment two:
What present embodiment was to use embodiment one said device looks audio media files video code model detection method, and flow chart is as shown in Figure 2.The step of the said method of present embodiment is following:
Obtain the step of detection task: be used for described detection task acquiring unit and obtain mission bit stream, detect mission bit stream and comprise filename and the store path of looking audio media files to be detected at database.
Look the step of audio media files decoding: be used for described File Open unit and open the audio media files of looking to be detected that detects the mission bit stream appointment; The audio media files of looking to be detected to opening differentiates whether video code model is the Mpeg-2 form; If medium to be detected are opened failure or video code model not to be the Mpeg-2 form then to get into " detection information output step ", if to open success and video code model be the Mpeg-2 form then get into next step.
Look the step that the audio frequency basic parameter detects: be used for the described audio frequency basic parameter detecting unit of looking elementary video parameter, the elementary audio parameter of looking audio media files, the legitimacy of looking the audio frequency relevance are detected; If it is defective then get into " step of detection information output " to look the audio frequency basic parameter, detects qualified then get into next step if look the audio frequency basic parameter.
Mpeg-2 flows the step of detection basically: be used for described Mpeg-2 and flow detecting unit basically and the Mpeg-2 that looks audio media files is flowed basically detect, the project of detection comprises: sequence head, image sets layer, image layers, Slice layer, macroblock layer.Wherein, the detection of sequence head comprises a plurality of parameters such as image level size, image vertical dimension, quantization matrix element.The image level size has been stipulated the size of image level direction, does not meet standard and might cause the decoding failure, and the image vertical dimension has been stipulated the size of image vertical direction, does not meet standard and might cause the decoding failure equally.An element intra_quant [0] [0] of quantization matrix is necessary for 8 in the frame, and non-8 values can cause decoding error, and other quantization matrix elements must be non-0, otherwise 0 as divisor, will cause the decoding failure.Image layers is done detection to the type of coding (picture_coding_type) of image, and value 1,2 or 3 is legal, and other values are illegal value.The Slice layer is to MBA huffiman code, and the VLC code word of macro block (mb) type etc. detects, and must be the code word of stipulating in the ISO/IEC 13818-2 annex code table, otherwise can cause Slice decoding failure.Macroblock layer is done detection to the VLC code word of interior macroblocks, must be the code word of stipulating in the ISO/IEC 13818-2 annex code table, otherwise will cause the macro block decoding error.
Mpeg-2 flows basically to detect and comprises:
At first sequence head is detected this main detection: whether the horizontal size of video image and vertical dimension conformance with standard; Type should be one with level and meet the legal type (profile) of ISO/IEC 13818-2 standard the 8th chapter regulation and combining of level (level); Color format, low delay all should be consistent with Profile and Level indication.
Then the image sets layer is detected, the image sets layer detects two contents: the coding criterion of time-code (time_code) is consistent with ISO/IEC 13818-2; Can not comprise in the user data (user_data) and have continuous 23 and above zero bit strings.
Detected image layer afterwards, this layer detects to every width of cloth image, comprises that last width of cloth display image must be I frame or P frame in the image sets, should comprise an I frame or P frame at least in the image sequence, and corresponding codes is necessary for " 111 " etc. in the MPEG-2 video sequence.
Detect the Slice layer again, whether the upright position of checking Slice is in prescribed limit.For example: for the SD video of pal mode, the upright position of Slice can not surpass 36; For the HD video of 1080p, the upright position of Slice can not surpass 68.
Survey macroblock layer at last.The detection content comprises: the macro block of appointment (macroblock) should be positioned within the border of image; First macro block and the last macro block of a slice cannot be skipped; Slice cannot be overlapping, and each slice in the middle of the piece image closely is connected, and partition etc. does not have.
The step of detection information output: the testing result that be used for that described information output unit is collected the File Open unit, looked audio frequency basic parameter detecting unit, Mpeg-2 flows detecting unit basically and write down is also exported testing result.
Whether the information that the collection step of detection information output detects is mistake and the output of finding of error level various ways with through the information that detects with through detection.The mode of output generally has three kinds: show at this machine of technological audit client, testing result is generated a testing result file, testing result is transferred to the technological audit service end.The testing result file can be a txt text, also can be the XML file of a tape format and mark, so that other equipment or system carry out further automation processed according to the label information in the XML file to testing result.
Embodiment three:
Present embodiment is the improvement of embodiment two, is the refinement of embodiment two about " Mpeg-2 flows the step of detection basically ".The substep that detects each project in the present embodiment described " Mpeg-2 flows the step of detection basically " comprises:
Sequence head detects, and comprising: whether the horizontal size of video image and vertical dimension conformance with standard, type and level whether conformance with standard, color format, hang down and whether postpone conformance with standard.
The image sets layer detects, and comprising: whether time-code can not comprise in conformance with standard, the user data and have continuous 23 and above zero bit strings.
Image layers detects, and image layers detects to every width of cloth image, comprises that last width of cloth display image must be I frame or P frame in the image sets, should comprise an I frame or P frame at least in the image sequence, and corresponding codes is necessary for " 111 " in the MPEG-2 video sequence.
The Slice layer detects, and whether the upright position of checking Slice is in prescribed limit.For example: for the SD video of pal mode, the upright position of Slice can not surpass 36; For the HD video of 1080p, the upright position of Slice can not surpass 68.
Macroblock layer detects, and comprising: macro block should be positioned within the border of image, and the head of a slice and last macro block cannot be skipped, and slice cannot be overlapping, and each slice in the middle of the piece image closely is connected, and partition does not have.
What should explain at last is; Below only unrestricted in order to technical scheme of the present invention to be described; Although with reference to the preferred arrangement scheme the present invention is specified, those of ordinary skill in the art should be appreciated that can be to technical scheme of the present invention (such as the annexation of device; The front and back sequential scheduling of step) makes amendment or be equal to replacement, and do not break away from the spirit and the scope of technical scheme of the present invention.Method of the present invention can be worked out to being applied to the program of computer system, and runs in the computer network system of the present invention.
Claims (3)
1. look audio media files video code model checkout gear for one kind; It is characterized in that; Comprise: detect the task acquiring unit; Described detection task acquiring unit is connected with the File Open unit, described File Open unit with look audio frequency basic parameter detecting unit and be connected with information output unit, the described audio frequency basic parameter detecting unit of looking flows detecting unit basically with Mpeg-2 and is connected with information output unit; Described Mpeg-2 flows detecting unit basically and is connected with information output unit, and described Mpeg-2 flows catenation sequence head detection successively in the detecting unit, the detection of image sets layer, image layers detection, the detection of Slice layer, five modules of macroblock layer detection basically.
One kind use the said device of claim 1 look audio media files video code model detection method, it is characterized in that the step of said method is following:
Obtain the step of detection task: be used for described detection task acquiring unit and obtain at database and will detect mission bit stream, detect mission bit stream and comprise filename and the store path of looking audio media files to be detected;
Look the step of audio media files decoding: be used for described File Open unit and open the audio media files of looking to be detected that detects the mission bit stream appointment through decoder; The audio media files of looking to be detected to opening differentiates whether video code model is the Mpeg-2 form; If to open failure or video code model be not the Mpeg-2 form then get into " detection information output step ", if to open success and video code model be the Mpeg-2 form then get into next step;
Look the step that the audio frequency basic parameter detects: be used for the described audio frequency basic parameter detecting unit of looking elementary video parameter, elementary audio parameter of looking audio media files to be detected, the legitimacy of looking the audio frequency relevance are detected; If it is defective then get into " step of detection information output " to look the audio frequency basic parameter, detects qualified then get into next step if look the audio frequency basic parameter;
Mpeg-2 flows the step of detection basically: be used for described Mpeg-2 and flow detecting unit basically and the Mpeg-2 that looks audio media files is flowed basically detect, the project of detection comprises: sequence head, image sets layer, image layers, Slice layer, macroblock layer;
The step of detection information output: the testing result that be used for that described information output unit is collected the File Open unit, looked audio frequency basic parameter detecting unit, Mpeg-2 flows detecting unit basically and write down is also exported testing result.
3. method according to claim 2 is characterized in that, the substep that detects each project in described " Mpeg-2 flows the step of detection basically " comprises:
Sequence head detects, and comprising: whether the horizontal size of video image and vertical dimension conformance with standard, and whether type and level conformance with standard, color format, hangs down and whether postpones conformance with standard;
The image sets layer detects, and comprising: whether time-code conformance with standard, can not comprise in the user data to have continuous 23 and above zero bit strings;
Image layers detects, and image layers detects to every width of cloth image, and comprising: last width of cloth display image must be I frame or P frame in the image sets, should comprise an I frame or P frame at least in the image sequence, and corresponding codes is necessary for " 111 " in the MPEG-2 video sequence;
The Slice layer detects, and whether the vertical dimension of checking Slice and related partly value with the image vertical dimension thereof be in prescribed limit;
Macroblock layer detects, and comprising: macro block should be positioned within the border of image, and the head of a slice and last macro block cannot be ignored, and slices cannot be overlapping, and each slices in the middle of the piece image closely is connected, and partition does not have.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095995A (en) * | 2013-01-09 | 2013-05-08 | 上海思华科技股份有限公司 | Method and system for automatic technical inspection of media files |
| CN104156373A (en) * | 2013-05-15 | 2014-11-19 | 宏碁股份有限公司 | Coding format detection method and device |
| CN104202611A (en) * | 2014-09-01 | 2014-12-10 | 赛特斯信息科技股份有限公司 | Method of realizing detection on broken screen defect in video file based on video decoder |
| CN107566830A (en) * | 2017-09-21 | 2018-01-09 | 威创集团股份有限公司 | A kind of method, system and the relevant apparatus of the detection of splicing device signal fault |
| CN108600816A (en) * | 2018-05-17 | 2018-09-28 | 上海七牛信息技术有限公司 | A kind of detecting method of media, device and media play system |
| CN108704312A (en) * | 2018-04-26 | 2018-10-26 | 网易（杭州）网络有限公司 | The test method and device of fine arts resource |
| CN108737832A (en) * | 2018-05-28 | 2018-11-02 | 安徽维德工业自动化有限公司 | A kind of video artefacts detecting system and its method based on Video Decoder |
| CN109246333A (en) * | 2018-09-19 | 2019-01-18 | 北京正奇联讯科技有限公司 | The control method and device of video playing |
| CN110545416A (en) * | 2019-09-03 | 2019-12-06 | 国家广播电视总局广播电视科学研究院 | ultra-high-definition film source detection method based on deep learning |
| CN112954371A (en) * | 2019-12-10 | 2021-06-11 | 德科仕通信(上海)有限公司 | Live broadcast content ES feature code extraction method and live broadcast content consistency comparison method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056414A (en) * | 2006-12-22 | 2007-10-17 | 武汉大学 | A joint coding method for video data stream source and channel |
| CN102006499A (en) * | 2010-12-10 | 2011-04-06 | 北京中科大洋科技发展股份有限公司 | Method for detecting video and audio quality of digital television program file |
-
2012
- 2012-08-16 CN CN201210291819.9A patent/CN102833543B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056414A (en) * | 2006-12-22 | 2007-10-17 | 武汉大学 | A joint coding method for video data stream source and channel |
| CN102006499A (en) * | 2010-12-10 | 2011-04-06 | 北京中科大洋科技发展股份有限公司 | Method for detecting video and audio quality of digital television program file |
Non-Patent Citations (3)
| Title |
|---|
| 梁绍祖: "浅论新型的高效上载方式", 《电视技术》 * |
| 胡键巧: "视音频文件自动技审的检测模板解析", 《广播与电视技术》 * |
| 钟玉琢等: "《MPEG-2运动图像压缩编码国际标准及MPEG的新进展》", 31 March 2002 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095995A (en) * | 2013-01-09 | 2013-05-08 | 上海思华科技股份有限公司 | Method and system for automatic technical inspection of media files |
| CN103095995B (en) * | 2013-01-09 | 2016-03-23 | 上海思华科技股份有限公司 | The automatic skill detecting method of media file and system |
| CN104156373A (en) * | 2013-05-15 | 2014-11-19 | 宏碁股份有限公司 | Coding format detection method and device |
| CN104156373B (en) * | 2013-05-15 | 2017-06-06 | 宏碁股份有限公司 | Coded format detection method and device |
| CN104202611A (en) * | 2014-09-01 | 2014-12-10 | 赛特斯信息科技股份有限公司 | Method of realizing detection on broken screen defect in video file based on video decoder |
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| CN108704312A (en) * | 2018-04-26 | 2018-10-26 | 网易（杭州）网络有限公司 | The test method and device of fine arts resource |
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| CN109246333A (en) * | 2018-09-19 | 2019-01-18 | 北京正奇联讯科技有限公司 | The control method and device of video playing |
| CN110545416A (en) * | 2019-09-03 | 2019-12-06 | 国家广播电视总局广播电视科学研究院 | ultra-high-definition film source detection method based on deep learning |
| CN112954371A (en) * | 2019-12-10 | 2021-06-11 | 德科仕通信(上海)有限公司 | Live broadcast content ES feature code extraction method and live broadcast content consistency comparison method |
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