CN113473041A - Method for processing ultra-high-definition analog video image and hard disk video recording equipment - Google Patents
Method for processing ultra-high-definition analog video image and hard disk video recording equipment Download PDFInfo
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Abstract
The invention discloses a method for processing an ultra-high-definition analog video image and a hard disk video recording device, wherein when a DVR receives the ultra-high-definition analog video image collected by an ultra-high-definition camera, the resolution and/or frame rate of the ultra-high-definition analog video image is reduced to be less than or equal to that of the ultra-high-definition analog video image, and a video signal transmission channel in the hard disk video recording device compositely transmits transmission parameter values required by the ultra-high-definition analog video image to obtain a high-definition analog video image; performing analog-to-digital conversion on the high-definition analog video image to obtain a digital video image; compositing a digital video image to the video signal transmission channel for transmission; and after the transmitted digital video image is de-compounded, performing preview processing and/or coding storage on the de-compounded digital video image. The stored digital video images are encoded for subsequent playback. Therefore, the 1080P non-real-time DVR realizes the previewing, playing, coding and storing of the ultra-high-definition analog video images acquired by the ultra-high-definition camera.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a method for processing an ultra-high definition analog video image and hard disk video equipment.
Background
With the development of image technology, it is a development trend to apply the acquisition, storage and processing of video images to the monitoring field. In order to realize video monitoring of a monitoring area, the adopted process is as follows: installing a camera in a monitoring area, and transmitting an analog video image of the monitoring area to a hard disk video recording Device (DVR) after the camera collects the analog video image; the DVR carries out analog-to-digital conversion on the received analog video image to obtain a digital video image, the DVR carries out coding storage and/or real-time preview on the obtained digital video image subsequently, and the digital video image which is subjected to coding storage can be played back.
To accommodate the needs of different users and to optimize the experience experienced by different users, DVRs are of different types, such as a DVR that processes non-real-time video images with a resolution of 1280 × 720(720P), a DVR that processes non-real-time video images with a resolution of 1920 × 1080(1080P), or a DVR that processes real-time video images with a resolution of 1920 × 1080(1080P), etc. In the monitoring process, a 1080P non-real-time DVR, that is, a DVR which processes a non-real-time video image with a resolution of 1080P, where the non-real-time video image refers to an ultra high definition camera which needs to be connected to the mainstream after the encoding, storing and processing of the DVR, has a frame rate different from that of a video image output by the ultra high definition camera, for example, an analog camera with a resolution of 2650 × 1440 and a frame rate of 30 or 25, which may be referred to as a 4M analog camera, and performs encoding, storing and previewing processing after receiving the analog video image collected by the ultra high definition camera.
Fig. 1 is a schematic structural diagram of a 1080P non-real-time DVR provided by the prior art, which includes: a first analog-to-digital (AD) conversion module 101, a first Video Input (VI) module 102, a first video processing module 103, a first Video Output (VO) preview module 104, and a first encoding storage module 105, wherein,
the first AD module 101 is configured to receive an ultra-high-definition analog video image acquired by an ultra-high-definition camera, perform analog-to-digital conversion, and obtain a digital video image;
the first VI module 102 is configured to receive the digital video image from the first AD module 101, and transmit the digital video image to the video processing module 103;
the first video processing module 103 is configured to output the digital video image subjected to preview processing and encoding processing to the first VO preview module 104, and output the digital video image subjected to encoding processing to the first encoding storage module 105;
a first VO preview module 104, configured to preview a digital video image obtained from the first video processing module 103;
a first encoding storage module 105, configured to encode and store the digital video image obtained from the first video processing module 1033.
In a 1080P non-real-time DVR, the first AD module has 4 input channel interfaces for accessing a video image output interface of the ultra-high-definition camera, that is, 4 channels of ultra-high-definition analog video images can be received through the 4 input channels. The first VI module is provided with 2 video signal transmission standard (BT656) transmission channels and is used for transmitting the digital video images converted by the first AD module to the first video processing module. Therefore, the 1080P non-real-time DVR needs to compound the ultra-high-definition analog video images of 4 input channels received by the first AD module into digital video images of 2 transmission channels through the VI module, transmit the digital video images to the video processing module, and then obtain the digital video images of 4 transmission channels after de-compounding by the video processing module.
The maximum sampling clock supported by the port of the BT656 transmission channel is 148.5 megahertz (MHz), and the sampling clock required by one BT656 transmission channel when transmitting ultra-high-definition video images is 148.5 MHz. Therefore, when the analog video image is captured by the ultra-high-definition camera, the analog video image is an ultra-high-definition analog video image, and the 1 BT656 transmission channel in the first VI module only supports transmission of the analog video image converted by the 1 input channel at most, and cannot be transmitted by combining the analog video image converted by the 2 input channels.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a method for processing an ultra high definition analog video image, where the method is capable of combining an ultra high definition analog video image of multiple input channels acquired by an ultra high definition camera in a video signal transmission channel of a 1080P non-real-time DVR for transmission, and then performing preview playing and encoding storage.
The embodiment of the invention also provides a hard disk digital device for processing the ultra-high-definition analog video images, and the device can compound the ultra-high-definition analog video images of a plurality of input channels acquired by the ultra-high-definition camera into one transmission channel in the 1080P non-real-time DVR for transmission, and then perform preview playing and coding storage.
The embodiment of the invention is realized as follows:
a method of processing ultra high definition analog video images, the method comprising:
receiving a first ultra-high-definition analog video image acquired by an ultra-high-definition camera;
reducing the frame rate of the first ultra-high-definition analog video image to be less than or equal to a frame rate, and obtaining a second ultra-high-definition analog video image by a video signal transmission channel in the hard disk video equipment according to transmission parameter values required by the composite transmission of the first ultra-high-definition analog video image;
performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image;
the digital video image is compounded to a video signal transmission channel in the hard disk video recording equipment for transmission;
after the transmitted digital video images are de-compounded, previewing and/or coding and storing the de-compounded digital video images;
the preview processing comprises preview processing in a local large-picture preview mode, and the resolution and the frame rate of the digital video image subjected to the preview processing are respectively the same as those of the second ultra-high-definition analog video image;
the resolution of the digital video image stored by the coding is smaller than that of the second ultra-high definition analog video image, and the frame rate of the digital video image is the same as that of the second ultra-high definition analog video image.
Optionally, the reducing the frame rate of the first ultra-high-definition analog video image to be less than or equal to, and the transmission parameter values required by a video signal transmission channel in a hard disk recording device in the process of compositely transmitting the first ultra-high-definition analog video image include:
identifying the frame rate of the received first ultra-high-definition analog video image, judging that the identified frame rate exceeds the frame rate required when the video signal transmission channel compositely transmits the first ultra-high-definition analog video image, and confirming that the frame rate of the first ultra-high-definition analog video image is reduced;
controlling an ultra-high-definition camera to reduce the frame rate of the acquired first ultra-high-definition analog video image;
and continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera.
Optionally, the previewing the de-composited digital video image further includes:
and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
Optionally, the reducing the frame rate of the first ultra-high-definition analog video image to be less than or equal to, and the transmission parameter values required by a video signal transmission channel in a hard disk recording device in the process of compositely transmitting the first ultra-high-definition analog video image include:
and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
Optionally, the step of setting the resolution of the previewed digital video image in the local small-screen preview mode to be smaller than the resolution of the second ultra-high-definition analog video image includes:
the resolution is at least half of the resolution of the second ultra high definition analog video image.
Optionally, the encoding the stored digital video image with a resolution less than the resolution of the second ultra high definition analog video image comprises:
the resolution of the digital video image processed by the encoding and storing is at least half of the resolution of the second ultra high definition analog video image.
A hard disk recording device for processing ultra high definition analog video images, comprising: an analog-to-digital conversion AD module, a video input VI module, a video processing module, a video output VO preview module and a coding storage module, wherein,
the AD module is used for receiving a first ultra high definition analog video image acquired by an ultra high definition camera, reducing the frame rate of the first ultra high definition analog video image to be less than or equal to a frame rate, and obtaining a second ultra high definition analog video image by a video signal transmission channel in hard disk video equipment according to a transmission parameter value required by the composite transmission of the first ultra high definition analog video image; performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image; compositing the digital video images and sending the composite digital video images to the VI module;
the VI module comprises at least one video signal transmission channel and is used for transmitting the digital video image received from the AD module to the video processing module through one video signal transmission channel;
the video processing module is configured to de-multiplex the digital video images received from the VI module, preview the de-multiplexed digital video images, send the de-multiplexed digital video images to the VO preview module, encode and store the de-multiplexed digital video images, and send the encoded and stored digital video images to the encoding and storing module, where the preview processing includes preview processing in a local large-screen preview mode, and a resolution and a frame rate of the previewed digital video images are respectively the same as a resolution and a frame rate of the second ultra high definition analog video image; the resolution of the digital video image subjected to encoding storage processing is smaller than that of the second ultra-high-definition analog video image, and the frame rate of the digital video image subjected to encoding storage processing is the same as that of the second ultra-high-definition video image;
the output VO preview module is used for previewing the digital video image subjected to preview processing and received from the video processing module;
and the coding storage module is used for storing the digital video image which is received from the video processing module and is subjected to coding storage processing.
Optionally, the AD module is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, where a transmission parameter value required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device includes:
identifying the frame rate of the received first ultra-high-definition analog video image, and sending a state signal to a VI module; after receiving a switching signal from the VI module, controlling an ultra-high-definition camera to reduce the frame rate of the acquired first ultra-high-definition analog video image; continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera;
and the VI module is used for judging that the identified frame rate exceeds the frame rate required when the video signal transmission channel compositely transmits the first ultra high definition analog video image according to the state signal, confirming that the frame rate of the first ultra high definition analog video image is reduced, and sending a switching signal to the AD module.
Optionally, the video processing module is further configured to perform preview processing on the de-composited digital video image, and further includes:
and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
Optionally, the video processing module is further configured to reduce the frame rate of the first ultra-high-definition analog video image to be less than or equal to, where a transmission parameter value required for compositely transmitting the first ultra-high-definition analog video image by a video signal transmission channel in a hard disk video recording device includes: and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
As can be seen from the above, when the DVR receives a first ultra high definition analog video image acquired by an ultra high definition camera, the frame rate of the first ultra high definition analog video image is reduced to be less than or equal to, and a video signal transmission channel in a hard disk video device obtains a second ultra high definition analog video image by compositely transmitting a transmission parameter value required for the first ultra high definition analog video image; performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image; compositing a digital video image to the video signal transmission channel for transmission; and after the transmitted digital video images are de-compounded, previewing and/or encoding and storing the de-compounded digital video images, and encoding and storing the stored digital video images for subsequent playback. Furthermore, the preview processing includes preview processing in a local large-screen preview mode, and the resolution and the frame rate of the digital video image subjected to the preview processing are respectively the same as those of the second ultra high definition analog video image; the resolution of the digital video image stored by the coding is smaller than that of the second ultra-high definition analog video image, and the frame rate of the digital video image is the same as that of the second ultra-high definition analog video image. Therefore, the frame rate of the first ultra-high-definition analog video image received by the 1080P non-real-time DVR can be reduced, and the first ultra-high-definition analog video image can be transmitted by a BT656 transmission channel in the 1080P non-real-time DVR and transmitted to a video processing module in the 1080P non-real-time DVR for preview processing and coding storage processing.
Drawings
FIG. 1 is a schematic diagram of a 1080P non-real-time DVR architecture as provided in the prior art;
fig. 2 is a flowchart of a method for processing an ultra-high-definition analog video image according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a hard disk recording device for processing ultra-high definition analog video images according to an embodiment of the present invention;
fig. 4 is a schematic view of a hard disk recording device for processing ultra-high definition analog video images according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second hard disk recording device structure for processing ultra-high definition analog video images according to an embodiment of the present invention;
fig. 6 is a schematic view of a hard disk recording device for processing ultra-high definition analog video images according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
As can be seen from the background art, the reason why the 1080P non-real-time DVR cannot process the ultra-high-definition analog video images of multiple input channels at the same time is that a BT656 transmission channel between a first AD module and a first video processing unit inside the DVR has an acquisition clock constraint and a channel number constraint, and cannot satisfy the requirement of transmitting and processing the ultra-high-definition analog video images of multiple input channels at the same time. Therefore, in order to solve this problem, it is necessary to perform corresponding processing on the ultra high definition analog video image received by the 1080P non-real-time DVR. Specifically, when the DVR receives a first ultra high definition analog video image acquired by an ultra high definition camera, the frame rate of the first ultra high definition analog video image is reduced to be less than or equal to a frame rate, and a video signal transmission channel in a hard disk video recording device obtains a second ultra high definition analog video image by compositely transmitting a transmission parameter value required by the first ultra high definition analog video image; performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image; compositing a digital video image to the video signal transmission channel for transmission; and after the transmitted digital video images are de-compounded, previewing and/or encoding and storing the de-compounded digital video images, and encoding and storing the stored digital video images for subsequent playback.
Furthermore, the preview processing includes preview processing in a local large-screen preview mode, and the resolution and the frame rate of the digital video image subjected to the preview processing are respectively the same as those of the second ultra high definition analog video image; the resolution of the digital video image stored by the coding is smaller than that of the second ultra-high definition analog video image, and the frame rate of the digital video image is the same as that of the second ultra-high definition analog video image.
Therefore, the frame rate of the first ultra-high-definition analog video image received by the 1080P non-real-time DVR is reduced, the first ultra-high-definition analog video image is transmitted by the BT656 transmission channel in the 1080P non-real-time DVR, and the first ultra-high-definition analog video image is transmitted to the video processing module in the 1080P non-real-time DVR for preview processing and coding storage processing.
Here, the ultra high definition video image refers to a video image with a resolution of 1440P, and the high definition video image refers to a video image with a resolution of 1080P. The first ultra high definition video image and the second ultra high definition video image mentioned in the embodiment of the present invention have a resolution of 1440P, but are different in frame rate.
Fig. 2 is a flowchart of a method for processing a high-definition analog video image according to an embodiment of the present invention, which includes the following specific steps:
Here, the ultra high definition camera is a 4M analog camera, which refers to a camera having a resolution of 2560 × 1440(1440P) and a frame rate of 30 or 25; the first ultra high definition analog video image refers to an analog video image with a resolution of 2560 x 1440(1440P) and a frame rate of 30; the second ultra high definition analog video image refers to an analog video image with a resolution of 2560 × 1440(1440P) and a frame rate of 15.
Specifically, when the 1080P non-real-time DVR is connected to the ultra-high-definition camera, and there are 2 video signal transmission channels in the 1080P non-real-time DVR and there are 4 access channels, when image and video of the 4 access channels need to be composited to the 2 video signal transmission channels for transmission, the frame rate of the first ultra-high-definition analog video image is reduced by at least half, so that the resolution and the frame rate required by the video signal transmission channels in the hard disk video recording device for compositely transmitting the first ultra-high-definition analog video image can be met, and the hard disk video recording device can process, preview, encode and store the first ultra-high-definition analog video image simultaneously input by multiple input channels.
Of course, the 1080P non-real-time DVR provided in the embodiment of the present invention may also be accessed to only one path of first ultra-high-definition video images input by the ultra-high-definition camera for performing frame rate reduction processing, or accessed to at least two paths of first ultra-high-definition video images input by the ultra-high-definition camera for performing frame rate reduction processing, which is not limited herein.
Here, the code stored in step 205 in the embodiment of the present invention is used for playback at a later time.
In this method, the reducing the frame rate of the first ultra high definition analog video image to be less than or equal to, and the transmission parameter values required for the video signal transmission channel in the hard disk recording device to compositely transmit the first ultra high definition analog video image include:
identifying the frame rate of the received first ultra-high-definition analog video image, judging that the identified frame rate exceeds the frame rate required when the video signal transmission channel compositely transmits the first ultra-high-definition analog video image, and confirming that the frame rate of the first ultra-high-definition analog video image is reduced; controlling an ultra-high-definition camera to reduce the frame rate of the acquired first ultra-high-definition analog video image; and continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera.
In this method, the performing preview processing on the de-composited digital video image further includes:
and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
In this method, the reducing the frame rate of the first ultra high definition analog video image to be less than or equal to, and the transmission parameter values required for the video signal transmission channel in the hard disk recording device to compositely transmit the first ultra high definition analog video image include: and reducing the frame rate of the first ultra-high-definition analog video image by at least half. In this case, the step of setting the resolution of the preview-processed digital video image in the local small picture preview mode to be smaller than the resolution of the second ultra high definition analog video image includes: the resolution is at least half of the resolution of the second ultra high definition analog video image. The encoding the stored digital video image with a resolution less than the resolution of the second ultra high definition analog video image comprises: the resolution of the digital video image processed by the encoding and storing is at least half of the resolution of the second ultra high definition analog video image.
In the method, another scheme is also included: and reducing the resolution of the first ultra-high-definition analog video image to be less than or equal to the resolution, and compositely transmitting transmission parameter values required by the first ultra-high-definition analog video image through a video signal transmission channel in the hard disk video equipment to obtain a second ultra-high-definition analog video image.
Two specific ways of implementing the above method are described below.
In a first mode, the resolution of the first ultra high definition analog video image is reduced, and it is assumed that the resolution of the first ultra high definition analog video image is reduced by at least half.
In this process, the process of specifically reducing the resolution of the first ultra high definition analog video image is as follows:
and performing black-back processing on the first ultra-high-definition analog video image, and inserting the set black video image data. Of course, the resolution of the first ultra high definition analog video image may be reduced in other ways.
In this case, the preview processing and/or code storing of the de-composited digital video image includes:
the resolution and the frame rate of the digital video image subjected to preview processing are respectively the same as those of the second ultra high definition analog video image;
and/or the resolution of the digital video image subjected to encoding storage processing is the same as that of the second ultra high definition analog video image, and the frame rate is at least half of that of the second ultra high definition analog video image.
That is, when the resolution is 2560 × 1440, the first ultra high definition analog video image with the frame rate of 30 is reduced to the resolution 1280 × 1440, and after the second ultra high definition analog video image with the frame rate of 30 is subjected to analog-to-digital conversion, composite transmission and de-composite, the resolution 1280 × 1440 of the digital video image obtained by preview processing is 1280 × 1440, the frame rate is 30, the resolution 1280 × 1440 of the digital video image obtained by encoding and storing is 15. In this way, the sample clock constraints of the BT656 transmission channel in the DVR can be met. The method has good real-time previewing and/or encoding, but the previewing definition is not high.
The second method comprises the following steps: and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
The reducing the frame rate of the first ultra high definition analog video image by at least half, that is, the resolution 2560 × 1440, the reducing the frame rate of the first ultra high definition analog video image with the frame rate of 30 to the resolution 2560 × 1440 and the reducing the frame rate of the second ultra high definition analog video image with the frame rate of 15, includes:
identifying the frame rate of the received first ultra-high-definition analog video image, judging that the identified frame rate exceeds the frame rate required when the video signal transmission channel compositely transmits the first ultra-high-definition analog video image, and confirming that the frame rate of the first ultra-high-definition analog video image is reduced;
controlling an ultra-high-definition camera to reduce the frame rate of the acquired first ultra-high-definition analog video image by at least half;
and continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera.
The second way can solve the problem of poor local preview definition, and there are two specific ways, which will be described in detail below,
the first implementation mode comprises the following steps: when the frame rate of the first ultra high definition analog video image is reduced by at least half, the previewing, encoding and/or storing the de-composited digital video image comprises the following steps:
when a local large-picture preview mode is adopted, the resolution and the frame rate of a digital video image subjected to preview processing are respectively the same as those of the second ultra-high-definition analog video image;
when a local small picture preview mode is adopted, the frame rate of a digital video image subjected to preview processing is the same as that of the second ultra-high-definition analog video image, and the resolution is at least half of that of the second ultra-high-definition analog video image;
and/or the resolution of the digital video image subjected to encoding storage processing is the same as that of the second ultra high definition analog video image, and the frame rate is half of that of the second ultra high definition analog video image.
That is, when the resolution 2560 × 1440, the first ultra high definition analog video image with the frame rate of 30 is reduced to the resolution 2560 × 1440, and the second ultra high definition analog video image with the frame rate of 15 is subjected to analog-to-digital conversion, composite transmission and de-composite, the resolution 2560 × 1440 of the digital video image in the local large-screen preview mode obtained by the preview processing is 15, the resolution 1280 × 720 of the digital video image in the local small-screen preview mode obtained by the preview processing is 15; the stored digital video images were encoded at a resolution 2540 x 1440, with a frame rate of 8. In this way, the sample clock constraints of the BT656 transmission channel in the DVR can be met. In this manner, due to the encoding performance, decoding performance and storage limitations of the encoding storage unit of the DVR provided by the embodiment of the present invention, the frame rate of the encoded and stored digital video image can only be 8 at a resolution of 2540 × 1440, which may cause the occurrence of the smearing phenomenon when the encoded and stored digital video image is used for local playback or remote playback.
In order to overcome the above problems, the second embodiment is adopted: when the frame rate of the first ultra high definition analog video image is reduced by at least half, the previewing, encoding and/or storing the de-composited digital video image comprises the following steps:
when a local large-picture preview mode is adopted, the resolution and the frame rate of a digital video image subjected to preview processing are respectively the same as those of the second ultra-high-definition analog video image;
when a local small picture preview mode is adopted, the frame rate of a digital video image subjected to preview processing is the same as that of the second ultra-high-definition analog video image, and the resolution is at least half of that of the second ultra-high-definition analog video image;
and/or the frame rate of the digital video images subjected to encoding storage processing is the same as that of the second ultra high definition analog video images, and the resolution is at least half of that of the second ultra high definition analog video images.
That is, when the resolution 2560 × 1440, the first ultra high definition analog video image with the frame rate of 30 is reduced to the resolution 2560 × 1440, and the second ultra high definition analog video image with the frame rate of 15 is subjected to analog-to-digital conversion, composite transmission and de-composite, the resolution 2560 × 1440 of the digital video image in the local large-screen preview mode obtained by the preview processing is 15, the resolution 1280 × 720 of the digital video image in the local small-screen preview mode obtained by the preview processing is 15; the resolution of the digital video image obtained by encoding and storing is 1280 × 720, and the frame rate is 15. In this way, the sample clock constraints of the BT656 transmission channel in the DVR can be met. The digital video image stored by the code has no smear phenomenon when being played back locally or remotely, and the effect of previewing or/and storing the code by the implementation is best.
Fig. 3 is a schematic structural diagram of a hard disk recording device for processing an ultra-high-definition analog video image according to an embodiment of the present invention, where the structure includes: an analog-to-digital conversion AD module 301, a video input VI module 302, a video processing module 303, a video output VO preview module 304, and an encoding storage module 305, wherein,
the AD module 301 is configured to receive a first ultra high definition analog video image acquired by an ultra high definition camera, reduce a frame rate of the first ultra high definition analog video image to be less than or equal to a frame rate, and obtain a second ultra high definition analog video image by using a transmission parameter value required by a video signal transmission channel in a hard disk video device for compositely transmitting the ultra high definition analog video image; performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image; compositing the digital video images, and sending to the VI module 302;
the VI module 302 includes at least one video signal transmission channel, and is configured to transmit the digital video image received from the AD module 301 to the video processing module 303 through the video signal transmission channel;
the video processing module 303 is configured to de-multiplex the digital video images received from the VI module 302, preview the de-multiplexed digital video images, send the de-multiplexed digital video images to the VO preview module 304, encode and store the de-multiplexed digital video images, and send the encoded and stored digital video images to the encoding and storing module 305; the preview processing comprises preview processing in a local large-picture preview mode, and the resolution and the frame rate of the digital video image subjected to the preview processing are respectively the same as those of the second ultra-high-definition analog video image; the resolution of the digital video image subjected to encoding storage processing is smaller than that of the second ultra-high-definition analog video image, and the frame rate of the digital video image subjected to encoding storage processing is the same as that of the second ultra-high-definition video image;
the output VO previewing module 304 is configured to preview the digital video image subjected to the previewing process and received from the video processing module 303;
the encoding storage module is configured to store the digital video image subjected to encoding storage processing and received from the video processing module 303.
Here, when the 1080P non-real-time DVR provided by the embodiment of the present invention is accessed to an ultra high definition camera, and 2 video signal transmission channels in the 1080P non-real-time DVR are provided, and 4 access channels are provided, when image and video of the 4 access channels need to be composited to the 2 video signal transmission channels for transmission, the resolution and/or frame rate of the ultra high definition analog video image is reduced by at least half, so that the resolution and frame rate required by the video signal transmission channel in the hard disk video device for compositely transmitting the first ultra high definition analog video image can be met.
Of course, the 1080P non-real-time DVR provided in the embodiment of the present invention may also be accessed to only one path of first ultra-high-definition video images input by the ultra-high-definition camera for performing frame rate reduction processing, or accessed to at least two paths of first ultra-high-definition video images input by the ultra-high-definition camera for performing frame rate reduction processing, which is not limited herein. Here, the codes stored in the embodiments of the present invention are used for playback at a later time.
In the apparatus, the AD module 301 is further configured to identify a frame rate of the received first ultra high definition analog video image, and send a status signal to the VI module 302; after receiving a switching signal from the VI module 302, controlling an ultra high definition camera to reduce a frame rate of the acquired first ultra high definition analog video image; continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera; the VI module 302 is configured to determine, according to the status signal, that the identified frame rate exceeds a frame rate required when the video signal transmission channel performs composite transmission on the first ultra high definition analog video image, determine to reduce the frame rate of the first ultra high definition analog video image, and send a switching signal to the AD module 301.
In this apparatus, the video processing module 303 is further configured to perform preview processing on the de-composited digital video image, and further includes: and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
In this apparatus, the video processing module 303 is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, where a transmission parameter value required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device includes: and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
Fig. 4 is a schematic structural diagram of a hard disk recording device for processing an ultra-high-definition analog video image according to an embodiment of the present invention, as shown in the drawing:
the AD module 301 is further configured to reduce the resolution of the first ultra high definition analog video image by at least half;
the video processing module 303 is further configured to perform preview processing and/or encoding storage on the de-composited digital video image, where the preview processing and/or encoding storage includes: the resolution and the frame rate of the digital video image subjected to preview processing are respectively the same as those of the second ultra high definition analog video image; and/or the resolution of the digital video image subjected to encoding storage processing is the same as that of the second ultra high definition analog video image, and the frame rate is at least half of that of the second ultra high definition analog video image.
The processing in this case of fig. 4 specifically includes:
the AD module 301 is further configured to reduce the resolution of the first ultra high definition analog video image to be less than or equal to, where transmission parameter values required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device include:
and performing black-back processing on the first ultra-high-definition analog video image, wherein the black-back processing is not limited, and inserting the set black video image data. Of course, the resolution of the first ultra high definition analog video image may be reduced in other ways.
Fig. 5 is a schematic diagram of a second hard disk recording device structure for processing an ultra-high-definition analog video image according to an embodiment of the present invention, as shown in the drawing:
the AD module 301 is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, where transmission parameter values required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device include: identifying the frame rate of the received first ultra high definition analog video image, and sending a status signal to the VI module 302; after receiving the switching signal from the VI module 302, controlling the ultra high definition camera to reduce the frame rate of the acquired first ultra high definition analog video image by at least half; continuously receiving a first ultra-high-definition analog video image acquired by an ultra-high-definition camera;
the VI module 302 is configured to determine, according to the status signal, that the identified frame rate exceeds a frame rate required when the video signal transmission channel performs composite transmission on the first ultra high definition analog video image, determine to reduce the frame rate of the first ultra high definition analog video image, and send a switching signal to the AD module 301.
In this case, the AD module 301 is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, where transmission parameter values required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device include: reducing the frame rate of the first ultra high definition analog video image by at least half;
the video processing module 303 is further configured to perform preview processing and/or encoding storage on the de-composited digital video image, where the preview processing and/or encoding storage includes: when a local large-picture preview mode is adopted, the resolution and the frame rate of a digital video image subjected to preview processing are respectively the same as those of the second ultra-high-definition analog video image; when a local small picture preview mode is adopted, the frame rate of a digital video image subjected to preview processing is the same as that of the second ultra-high-definition analog video image, and the resolution is at least half of that of the second ultra-high-definition analog video image; and/or the resolution of the digital video image subjected to encoding storage processing is the same as that of the second ultra high definition analog video image, and the frame rate is half of that of the second ultra high definition analog video image.
Fig. 6 is a schematic structural diagram of a hard disk recording device for processing an ultra-high-definition analog video image according to an embodiment of the present invention, as shown in the drawing:
the AD module 301 is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, where transmission parameter values required for compositely transmitting the first ultra high definition analog video image in a video signal transmission channel in a hard disk recording device include: reducing the frame rate of the first high-definition analog video image by at least half;
the video processing module 303 is further configured to perform preview processing and/or encoding storage on the de-composited digital video image, where the preview processing and/or encoding storage includes: when a local large-picture preview mode is adopted, the resolution and the frame rate of a digital video image subjected to preview processing are respectively the same as those of the second ultra-high-definition analog video image; when a local small picture preview mode is adopted, the frame rate of a digital video image subjected to preview processing is the same as that of the second ultra-high-definition analog video image, and the resolution is at least half of that of the second ultra-high-definition analog video image; and/or the frame rate of the digital video images subjected to encoding storage processing is the same as that of the second ultra high definition analog video images, and the resolution is at least half of that of the second ultra high definition analog video images.
It can be seen from the embodiments of the present invention that the embodiments of the present invention enhance the compatibility of the 1080P non-real-time DVR accessing the ultra high definition camera, and meet more user requirements. On the basis of optimizing the bandwidth performance of the DVR, the local preview definition, the local playback smoothness and definition, the remote preview smoothness and the like are improved.
In an embodiment of the present invention, the storage unit for storing the code in the 1080P Non-real-time DVR may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
In this embodiment of the present invention, the Processor adopted by the video Processing Unit in the 1080P non-real-time DVR may be a general Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc., without limitation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of processing ultra high definition analog video images, the method comprising:
receiving a first ultra-high-definition analog video image acquired by an ultra-high-definition camera;
reducing the frame rate of the first ultra-high-definition analog video image to be less than or equal to a frame rate, and obtaining a second ultra-high-definition analog video image by a video signal transmission channel in the hard disk video equipment according to transmission parameter values required by the composite transmission of the first ultra-high-definition analog video image;
performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image;
the digital video image is compounded to a video signal transmission channel in the hard disk video recording equipment for transmission;
after the transmitted digital video images are de-compounded, previewing and/or coding and storing the de-compounded digital video images;
the preview processing comprises preview processing in a local large-picture preview mode, and the resolution and the frame rate of the digital video image subjected to the preview processing are respectively the same as those of the second ultra-high-definition analog video image;
the resolution of the digital video image stored by the coding is smaller than that of the second ultra-high definition analog video image, and the frame rate of the digital video image is the same as that of the second ultra-high definition analog video image.
2. The method of claim 1, wherein the reducing the frame rate of the first ultra high definition analog video image to be less than or equal to the frame rate required for the video signal transmission channel in the hard disk recording device to compositely transmit the first ultra high definition analog video image comprises:
identifying the frame rate of the received first ultra-high-definition analog video image, judging that the identified frame rate exceeds the frame rate required when the video signal transmission channel compositely transmits the first ultra-high-definition analog video image, and confirming that the frame rate of the first ultra-high-definition analog video image is reduced;
controlling an ultra-high-definition camera to reduce the frame rate of the acquired first ultra-high-definition analog video image;
and continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera.
3. The method of claim 1, wherein said previewing said de-composited digital video image further comprises:
and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
4. The method of claim 1 or 3, wherein the reducing the frame rate of the first ultra high definition analog video image to be less than or equal to the frame rate required for the video signal transmission channel in the hard disk recording device to compositely transmit the first ultra high definition analog video image comprises:
and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
5. The method of claim 3, wherein the resolution of the preview-processed digital video image in the local small-screen preview mode being less than the resolution of the second ultra high definition analog video image comprises:
the resolution is at least half of the resolution of the second ultra high definition analog video image.
6. The method of claim 1 or 3, wherein the encoding the stored digital video image to a resolution less than the resolution of the second ultra high definition analog video image comprises:
the resolution of the digital video image processed by the encoding and storing is at least half of the resolution of the second ultra high definition analog video image.
7. A hard disk recording device for processing ultra high definition analog video images, comprising: an analog-to-digital conversion AD module (301), a video input VI module (302), a video processing module (303), a video output VO preview module (304) and an encoding storage module (305), wherein,
the AD module (301) is used for receiving a first ultra high definition analog video image acquired by an ultra high definition camera, reducing the frame rate of the first ultra high definition analog video image to be less than or equal to that, and obtaining a second ultra high definition analog video image by a video signal transmission channel in hard disk video equipment according to a transmission parameter value required by the composite transmission of the first ultra high definition analog video image; performing analog-to-digital conversion on the second ultra-high-definition analog video image to obtain a digital video image; compositing the digital video images, sending to the VI module (302);
the VI module (302) comprises at least one video signal transmission channel and is used for transmitting the digital video image received from the AD module (301) to the video processing module (303) through one video signal transmission channel;
the video processing module (303) is configured to de-multiplex the digital video images received from the VI module (302), preview the de-multiplexed digital video images, send the de-multiplexed digital video images to the VO preview module (304), encode and store the de-multiplexed digital video images, and send the de-multiplexed digital video images to the encoding and storing module (305), where the preview processing includes preview processing in a local large-screen preview mode, and a resolution and a frame rate of the previewed digital video images are respectively the same as a resolution and a frame rate of the second ultra high definition analog video image; the resolution of the digital video image subjected to encoding storage processing is smaller than that of the second ultra-high-definition analog video image, and the frame rate of the digital video image subjected to encoding storage processing is the same as that of the second ultra-high-definition video image;
the output VO preview module (304) is used for previewing the digital video image which is received from the video processing module (303) and is subjected to preview processing;
the coding storage module is used for storing the digital video image which is received from the video processing module (303) and is subjected to coding storage processing.
8. The hard disk recording device according to claim 7, wherein the AD module (301) is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, and the transmission parameter values required by the video signal transmission channel in the hard disk recording device for compositely transmitting the first ultra high definition analog video image comprise:
identifying the frame rate of the received first ultra high definition analog video image, and sending a state signal to a VI module (302); after receiving a switching signal from the VI module (302), controlling an ultra high definition camera to reduce the frame rate of the acquired first ultra high definition analog video image; continuously receiving the first ultra-high-definition analog video image acquired by the ultra-high-definition camera;
the VI module (302) is configured to determine, according to the status signal, that the identified frame rate exceeds a frame rate required when the video signal transmission channel performs composite transmission on the first ultra high definition analog video image, determine to reduce the frame rate of the first ultra high definition analog video image, and send a switching signal to the AD module (301).
9. The hard disk recording device of claim 7, wherein the video processing module (303) further configured to preview the de-multiplexed digital video image further comprises:
and performing preview processing on the de-compounded digital video image in a local small-picture preview mode, wherein the frame rate of the digital video image subjected to preview processing in the local small-picture preview mode is the same as that of the second ultra-high-definition analog video image, and the resolution is smaller than that of the second ultra-high-definition analog video image.
10. The hard disk recording device according to claim 7 or 9, wherein the video processing module (303) is further configured to reduce the frame rate of the first ultra high definition analog video image to be less than or equal to, and the transmission parameter values required by the video signal transmission channel in the hard disk recording device for compositely transmitting the first ultra high definition analog video image include:
and reducing the frame rate of the first ultra-high-definition analog video image by at least half.
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