CN102780869B - Video recording device and method - Google Patents

Video recording device and method Download PDF

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Publication number
CN102780869B
CN102780869B CN201210214360.2A CN201210214360A CN102780869B CN 102780869 B CN102780869 B CN 102780869B CN 201210214360 A CN201210214360 A CN 201210214360A CN 102780869 B CN102780869 B CN 102780869B
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video
frame per
module
code check
video image
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CN102780869A (en
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陈维山
马晓燕
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Abstract

The invention discloses a video recording device. The video recording device comprises a camera module, a video processing module, a video encoding module and a video synthesis module, wherein the video processing module is used for acquiring a video image output by the camera module, transmitting the video image to the video encoding module, judging the scene type of the video image, determining a new frame rate code rate strategy, and regulating the frame rate set by the camera module and the code rate set by the video encoding module according to the new frame rate code rate strategy. The invention also discloses a video recording method which is implemented by utilizing the video recording device. By using the video recording device and the video recording method, the frame rate and the code rate can be regulated according to the difference between output video images.

Description

A kind of recording apparatus and method
Technical field
The present invention relates to video recording equipment, in particular, relate to a kind of can according to the video image different adjustment frame per second exported and the recording apparatus of code check and method.
Background technology
Frame per second is the quantity of image per second, and a frame is exactly a secondary static picture, and continuous print frame just forms animation.High frame per second can obtain more smooth animation true to nature.Fps is the abbreviation of frames per second, i.e. display frame number per second, is the unit of frame per second.Frame number each second (fps), the more shown action will be more smooth.Code stream Data Rate, is also code check, refers to the data traffic that video uses within the unit interval, be in Video coding image quality control in most important part.Under same resolution and frame per second condition, the code stream of video file is larger, and compression ratio is less, and image quality is higher.
There is following defect in existing kinescope method:
Defect one: in the process of video recording, the frame per second of camera setting can not change, so when recording static picture and changing violent picture with recording, because frame per second is all identical, so to recording the violent this situation of picture of change, the fluency of video recording will be affected.When the picture that such as recording change is violent, 30fps frame per second video recording fluency can have been recorded a video a lot than 15fps frame per second.
Defect two: during shooting, code check can be fixed within limits, automatically can not adjust to the encoder bit rate of video recording according to scene, user also cannot regulate code check.Such as record static picture with record change violent picture time, the code check of control coding is fixing, can not record change violent picture in dynamic adjustments encoder bit rate.When another kind of situation is shooting, image quality remains unchanged, and code check can change within a fixed range, but cannot arrange according to particular demands, and code check is risen within the scope of higher one, makes the image quality of video recording higher.If the picture of video image changes and still continues to use the parameter of initial setting, each details that above two point defects will cause recording apparatus possibly cannot be recorded to change, the quality of the video file that impact generates.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of can according to the video image different adjustment frame per second exported and the recording apparatus of code check and method.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of recording apparatus, comprises camera module, video processing module, video encoding module and video recording synthesis module;
Described camera module is used for according to frame per second output video image;
Described video encoding module is used for encoding to described video image according to code check;
Described video processing module is used for carrying out the judgement of scene type to described video image thus determining new frame per second code check strategy according to described scene type, and the frame per second that camera module is arranged according to described new frame per second code check strategy adjustment and the code check that described video encoding module is arranged;
Described video recording synthesis module is used for the described video image completing coding to synthesize, and generates video file.
In recording apparatus of the present invention, described video processing module comprises video acquisition unit, scene judging unit, frame per second code check policy unit, frame rate adjustment unit and code rate adjustment unit;
Described video acquisition unit is for obtaining the described video image of described camera module output and being transferred to described video encoding module;
The described video image that described scene judging unit is used for obtaining carries out pattern analysis process, and judges current scene type;
Described frame per second code check policy unit is used for determining new frame per second code check strategy according to current described scene type;
Described frame rate adjustment unit is used for the frame per second that camera module is arranged according to described new frame per second code check strategy adjustment; Described code rate adjustment unit is used for the code check that video encoding module is arranged according to described new frame per second code check strategy adjustment.
In recording apparatus of the present invention, described video processing module is also provided with the rule base for formulating described new frame per second code check strategy according to special scenes type.
In recording apparatus of the present invention, described camera module also for pre-set frame per second and described video image size and according to arrange described frame per second and size output video image, described video encoding module is also for pre-setting code check.
In recording apparatus of the present invention, described recording apparatus also comprises audio collection coding module, described audio collection coding module, for gathering current sound, processes described current sound thus outputting audio data encoding to described voice data;
Described video recording synthesis module, also for being synthesized together with voice data by the described video image completing coding, generates video file.
Present invention also offers a kind of kinescope method, comprise the following steps:
S1, described camera module are according to frame per second output video image;
S2, video processing module obtain described video image, carry out the judgement of scene type to described video image and regulate frame per second and code check according to described scene type, described camera module is according to the described frame per second output video image after regulating and be transferred to video encoding module by video processing module;
S3, video encoding module are encoded to described video image according to the described code check after adjustment;
The described video image completing coding synthesizes by S4, video recording synthesis module, generates video file.
In kinescope method of the present invention, described step S2 specifically comprises:
S21, obtain described video image, pattern analysis process is carried out to described video image, and judges current scene type;
S22, judge whether to need to change described frame per second and code check according to described current scene type, if needed, redefine new frame per second code check strategy, and the described frame per second pre-set according to described new frame per second code check strategy adjustment and code check;
S23, according to regulate after described frame per second output video image and be transferred to video encoding module by video processing module.
In kinescope method of the present invention, described video processing module is also provided with rule base; Described step S2 also comprises and judges that described scene type is the need of the change frame per second of camera module and the code check of video encoding module, if needed, then redefines new frame per second code check strategy according to described rule base according to described rule base.
In kinescope method of the present invention, also comprise before described step S1:
S0, camera module pre-set the size of frame per second and described video image, and video encoding module pre-sets code check;
Described step S1 also comprises described camera module according to the described frame per second pre-set and size output video image.
In kinescope method of the present invention, described step S 1 also comprises audio collection coding module and gathers current sound, processes thus outputting audio data described current sound;
Described step S3 also comprises audio collection coding module and encodes to described voice data;
Described step S4 also comprises video recording synthesis module and is synthesized together with voice data by the described video image completing coding, generates video file.
Recording apparatus of the present invention and method have following beneficial effect: according to the difference of output video image, can automatically regulate frame per second and code check, the picture of change suddenly can be adapted to, ensure each details being recorded to change, improve image quality and the fluency of video recording.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the theory diagram of recording apparatus of the present invention;
Fig. 2 is the theory diagram according to a recording apparatus of the present invention preferred embodiment;
Fig. 3 is the flow chart of kinescope method of the present invention;
Fig. 4 is the flow chart of step S2 in kinescope method of the present invention preferred embodiment.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows a kind of recording apparatus, and this recording apparatus comprises camera module 1, video processing module 2, video encoding module 3 and video recording synthesis module 5.
Camera module 1 is for according to frame per second output video image.Video encoding module 3 is for encoding to video image according to code check.
Video processing module 2 for carrying out the judgement of scene type to video image thus determining new frame per second code check strategy according to scene type, and according to the new frame per second of frame per second code check strategy adjustment camera module 1 and the code check of video encoding module 3; Wherein, video processing module 2 is analyzed according to the video image exported, if picture record change acutely needs high speed video, its new strategy formulated can be even higher to 60fps, 120fps by frame rate adjustment, just can be recorded to each details of change, arrange its code check, the image quality of video recording also can correspondingly improve simultaneously.
Concrete scene type can comprise personage's scene, landscape scene, moving scene etc.Landscape scene comprises outdoor landscape, outdoor sandy beach, pyrotechnics etc., in order to improve its definition, can regulating the code check that it is encoded, if be personage's scene, in order to improve the definition of personage to see details clearly, can improve the code check of coding equally; If be moving scene, the scene that such as personage's running, joyride, fistfight, animal are run, for improving picture fluency, can improve frame per second; When take particular persons run scene time, should ensure to improve the definition of personage and details, improve the fluency of running action again, so both can improve coding frame per second, and improve encoder bit rate again.Understand, video processing module 2 is preset with rule base, stores the strictly all rules comprising above-mentioned rule in rule base, and these rules are used for formulating different frame per second code check strategy according to the scene type of different video image.
Certainly, if parameter current meets (comprising frame per second and code check) requirement of video image, then do not need to change the parameter arranged, then direct by transmission of video images to video encoding module.In addition, if picture changes suddenly acutely, although the video image for analyzing is not readjusted and still can be transferred to video encoding module, but due to whole policy development, adjustment process quickly, but a flash that this video image is just very short, can not consider, the video image exported afterwards has met pre-provisioning request.
After encoding video pictures completes, video recording synthesis module 5 synthesizes, and generates video file.
Fig. 2 shows a preferred embodiment of recording apparatus of the present invention, and in this embodiment, video processing module comprises video acquisition unit 201, scene judging unit 202, frame per second code check policy unit 203, frame rate adjustment unit 204 and code rate adjustment unit 205.
Wherein, video acquisition unit 201 is for obtaining the video image of camera module 1 output and being transferred to video encoding module 3.Scene judging unit 202 for carrying out pattern analysis process to the video image obtained, and judges current scene type.Because the method for pattern analysis process is not emphasis of the present invention, repeat no longer one by one herein.In addition, the method that scene judges can also judge daytime or night according to current time, controls, such as obtain the weather conditions in this place or judge whether this ground is scenic spot etc. according to gps data according to network remote.Certainly, this camera head also should make user carry out manual adjustments relevant parameter in video process.
Frame per second code check policy unit 203 is for determining new frame per second code check strategy according to current scene type, such as, if current video pictures is through being judged as moving scene, in new frame per second code check strategy, original 30fps can be adjusted to 60fps even higher, if be judged as landscape scene, in new frame per second code check strategy, encoder bit rate can be improved, the encoder bit rate of then recording a video brings up to 4Mb/s by original 1Mb/s, although here scene is not the scene of acute variation, but when judging it as landscape scene, in order to make the landscape of video recording gained more clear, frame per second code check policy unit 203 still generates the strategy improving code check automatically.In this embodiment, rule base should be arranged in frame per second code check policy unit 203, when scene judging unit draws scene type, can formulate new frame per second code check strategy at once.
The frame per second of frame rate adjustment unit 204 for arranging according to new frame per second code check strategy adjustment camera module 1, the code check of code rate adjustment unit 205 for arranging according to new frame per second code check strategy adjustment video encoding module 3.
Preferably, camera module 1 also for pre-set frame per second and video image size and according to arrange frame per second and size output video image, video encoding module 3 is also for pre-setting code check.
Preferably, audio collection coding module 4, for gathering current sound, processes current sound thus outputting audio data encoding to voice data.In addition, the video image completing coding synthesizes by video recording synthesis module 5 together with voice data, generates video file.Due to the process not emphasis of the present invention to audio frequency, repeat no longer one by one herein.
Fig. 3 shows a kind of kinescope method, comprises the following steps:
S1, camera module 1 are according to frame per second output video image;
S2, video processing module 2 obtain video image, carry out the judgement of scene type to video image and regulate frame per second and code check according to scene type, camera module 1 is according to the frame per second output video image after regulating and be transferred to video encoding module 3 by video processing module 2;
S3, video encoding module 3 are encoded to video image according to the code check after adjustment;
The video image completing coding synthesizes by S4, video recording synthesis module 5, generates video file.Wherein, video processing module 2 is analyzed according to the video image exported, if picture record change acutely needs high speed video, its new strategy formulated can be even higher to 60fps, 120fps by frame rate adjustment, just can be recorded to each details of change, arrange its code check, the image quality of video recording also can correspondingly improve simultaneously.In addition, if do not need in step S2 to change frame per second and code check, then according to frame per second and the code check continuation video recording of original setting, namely video image encoded and generate video file.
Concrete scene type can comprise personage's scene, landscape scene, moving scene etc.Landscape scene comprises outdoor landscape, outdoor sandy beach, pyrotechnics etc., in order to improve its definition, can regulating the code check that it is encoded, if be personage's scene, in order to improve the definition of personage to see details clearly, can improve the code check of coding equally; If be moving scene, the scene that such as personage's running, joyride, fistfight, animal are run, for improving picture fluency, can improve frame per second; When take particular persons run scene time, should ensure to improve the definition of personage and details, improve the fluency of running action again, so both can improve coding frame per second, and improve encoder bit rate again.
Preferably, video processing module 2 is also preset with rule base, stores the strictly all rules comprising above-mentioned rule in rule base, and these rules are used for formulating different frame per second code check strategy according to the scene type of different video image.Step S2 also comprises and judges that scene type is the need of the change frame per second of the camera module 1 and code check of video encoding module 3, if needed, then redefines new frame per second code check strategy according to rule base according to rule base.
Certainly, if parameter current meets (comprising frame per second and code check) requirement of video image, then do not need to change the parameter arranged, then direct by transmission of video images to video encoding module.In addition, if picture changes suddenly acutely, although the video image for analyzing is not readjusted and still can be transferred to video encoding module, but due to whole policy development, adjustment process quickly, but a flash that this video image is just very short, can not consider, the video image exported afterwards has met pre-provisioning request.
Kinescope method one of the present invention preferred embodiment in, as shown in Figure 4, in this execution mode, step S2 specifically comprises:
S21, video processing module 2 obtain video image, carry out pattern analysis process to video image, and judge current scene type;
According to current scene type, S22, video processing module 2 judge whether that needs change the frame per second and code check pre-set, if do not needed, then directly enter step S3, otherwise redefine new frame per second code check strategy, and the frame per second pre-set according to new frame per second code check strategy adjustment and code check;
S23, camera module 1 according to regulate after frame per second output video image and be transferred to video encoding module by video processing module.
Certainly, in step S21, the method that scene judges can also judge daytime or night according to current time, controls, such as obtain the weather conditions in this place or judge whether this ground is scenic spot etc. according to gps data according to network remote.Certainly, this camera head also should make user carry out manual adjustments relevant parameter in video process.
In step S22, if current video pictures is through being judged as moving scene, in new frame per second code check strategy, original 30fps can be adjusted to 60fps even higher, if be judged as landscape scene, in new frame per second code check strategy, encoder bit rate can be improved, the encoder bit rate of then recording a video may bring up to 4Mb/s by original 1Mb/s, although here scene is not the scene of acute variation, but when judging it as landscape scene, in order to make the landscape of video recording gained more clear, frame per second code check policy unit 203 still generates the strategy improving code check automatically.Be understandable that, also should comprise before step S0, pre-set rule base, prestore the frame per second code check policing rule for formulating different frame per second code check strategy according to different video image in this rule base, this step is the setting up procedure belonged to before recording apparatus dispatches from the factory.So, when judging scene type in step S22, new frame per second code check strategy can be formulated at once.
Preferably, step S0 also comprises the size that camera module 1 pre-sets frame per second and video image, and video encoding module 3 pre-sets code check;
Step S1 also comprises camera module 1 according to the frame per second pre-set and size output video image.
Preferably, step S1 also comprises audio collection coding module 4 and gathers current sound, processes thus outputting audio data current sound;
Step S3 also comprises audio collection coding module 4 pairs of voice datas and encodes;
Step S4 also comprises video recording synthesis module 5 and is synthesized together with voice data by the video image completing coding, generates video file.
Although the present invention is described by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, various conversion can also be carried out and be equal to substituting to the present invention.In addition, for particular condition or material, various amendment can be made to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes fallen within the scope of the claims in the present invention.

Claims (8)

1. a recording apparatus, is characterized in that, comprises camera module (1), video processing module (2), video encoding module (3) and video recording synthesis module (5);
Described camera module (1) is for according to frame per second output video image;
Described video encoding module (3) is for encoding to described video image according to code check;
Described video processing module (2) is for carrying out the judgement of scene type thus determining new frame per second code check strategy according to described scene type to described video image, and the frame per second that camera module (1) is arranged according to described new frame per second code check strategy adjustment and the code check that described video encoding module (3) is arranged;
Described video recording synthesis module (5), for being synthesized by the described video image completing coding, generates video file;
Described video processing module (2) comprises video acquisition unit (201), scene judging unit (202), frame per second code check policy unit (203), frame rate adjustment unit (204) and code rate adjustment unit (205);
Described video acquisition unit (201) is for the described video image that obtains described camera module (1) and export and be transferred to described video encoding module (3);
Described scene judging unit (202) for carrying out pattern analysis process to the described video image obtained, and judges current scene type;
Described frame per second code check policy unit (203) is for determining new frame per second code check strategy according to current described scene type;
The frame per second that described frame rate adjustment unit (204) is arranged for camera module according to described new frame per second code check strategy adjustment; The code check that described code rate adjustment unit (205) is arranged for video encoding module according to described new frame per second code check strategy adjustment.
2. recording apparatus according to claim 1, is characterized in that, described video processing module (2) is also provided with the rule base for formulating described new frame per second code check strategy according to special scenes type.
3. recording apparatus according to claim 1, it is characterized in that, described camera module (1) also for pre-set frame per second and described video image size and according to arrange described frame per second and size output video image, described video encoding module (3) is also for pre-setting code check.
4. recording apparatus according to claim 1, it is characterized in that, described recording apparatus also comprises audio collection coding module (4), described audio collection coding module (4), for gathering current sound, processes described current sound thus outputting audio data encoding to described voice data;
Described video recording synthesis module (5), also for being synthesized together with voice data by the described video image completing coding, generates video file.
5. a kinescope method, is characterized in that, comprises the following steps:
S1, camera module (1) are according to frame per second output video image;
S2, video processing module (2) obtain described video image, carry out the judgement of scene type to described video image and regulate frame per second and code check according to described scene type, described camera module (1) is also transferred to video encoding module (3) by video processing module (2) according to the described frame per second output video image after adjustment;
S3, video encoding module (3) are encoded to described video image according to the described code check after adjustment;
The described video image completing coding synthesizes by S4, video recording synthesis module (5), generates video file;
Described step S2 specifically comprises:
S21, obtain described video image, pattern analysis process is carried out to described video image, and judges current scene type;
S22, judge whether to need to change described frame per second and code check according to described current scene type, if needed, redefine new frame per second code check strategy, and the described frame per second pre-set according to described new frame per second code check strategy adjustment and code check;
S23, be transferred to video encoding module (3) by video processing module (2) according to the described frame per second output video image after regulating.
6. kinescope method according to claim 5, is characterized in that, described video processing module (2) is also provided with rule base; Described step S2 also comprises and judges that described scene type is the need of the frame per second and the code check of video encoding module (3) that change camera module (1) according to described rule base, if needed, then redefine new frame per second code check strategy according to described rule base.
7. kinescope method according to claim 5, is characterized in that, also comprises before described step S1:
S0, camera module (1) pre-set the size of frame per second and described video image, and video encoding module (3) pre-sets code check;
Described step S1 also comprises described camera module (1) according to the described frame per second pre-set and size output video image.
8. kinescope method according to claim 5, is characterized in that, described step S1 also comprises audio collection coding module (4) and gathers current sound, processes thus outputting audio data described current sound;
Described step S3 also comprises audio collection coding module (4) and encodes to described voice data;
Described step S4 also comprises video recording synthesis module (5) and is synthesized together with voice data by the described video image completing coding, generates video file.
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