CN111246180A - Sending method and device and receiving method and device of analog data signal - Google Patents
Sending method and device and receiving method and device of analog data signal Download PDFInfo
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- CN111246180A CN111246180A CN202010081719.8A CN202010081719A CN111246180A CN 111246180 A CN111246180 A CN 111246180A CN 202010081719 A CN202010081719 A CN 202010081719A CN 111246180 A CN111246180 A CN 111246180A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
Abstract
The embodiment of the invention provides a sending method and a device and a receiving method and a device of an analog data signal, wherein the sending method comprises the following steps: receiving digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; generating a video frame identification ID, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data; inserting the video frame ID into the data frame of the corresponding digital video image data and the data frame of the auxiliary data; converting the digital video image data and the auxiliary data carrying the video frame ID into analog data signals; and sending the analog data signal to a receiving end. The problem that auxiliary data and video information cannot be synchronously transmitted in analog video data processing in the prior art is solved, and synchronous transmission of the auxiliary data and the video information is realized.
Description
Technical Field
The invention relates to the technical field of audio and video and communication, in particular to a sending method and device and a receiving method and device of an analog data signal.
Background
The analog video monitoring system is a representative of a security monitoring system and occupies a large share once, the analog video monitoring system is still continuously developed and upgraded due to the characteristics of low system delay, timely response, low cost and the like, and with the appearance of technical hotspots such as artificial intelligence and the like, the current analog security system needs to synchronously transmit auxiliary data and video information more and more, and meanwhile, the quality and the processing speed of monitoring video information are not lost, so that the intelligent analog security system can be realized.
In the related art, no reasonable solution exists at present for the problem that the auxiliary data and the video information cannot be synchronously transmitted in the analog video data processing.
Disclosure of Invention
The embodiment of the invention provides a sending method and a sending device of an analog data signal, a receiving method and a receiving device of the analog data signal, and aims to at least solve the problem that auxiliary data and video information cannot be synchronously transmitted in analog video data processing in the related art.
According to an embodiment of the present invention, there is provided a transmission method of an analog data signal, including: receiving digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; generating a video frame Identification (ID), wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data; inserting the video frame ID into a corresponding data frame of the digital video image data and a data frame of the auxiliary data; converting the digital video image data and the ancillary data carrying the video frame ID into analog data signals; and sending the analog data signal to a receiving end.
Optionally, generating the video frame identification ID comprises: and generating the video frame ID according to frame synchronization information of the digital video image data, wherein the frame synchronization information is used for indicating the starting position and/or the ending position of each frame of the digital video image data.
Optionally, generating the video frame ID according to the frame synchronization information of the digital video image data includes: acquiring a time stamp corresponding to each frame of data of the digital video image data; setting the timestamp to the video frame ID.
Optionally, inserting the video frame ID into the corresponding data frame of the auxiliary data includes: generating a data frame ID according to the video frame ID, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, the data frame ID is used for uniquely identifying each frame data of the auxiliary data, and the encoding format of the data frame ID is matched with the packaging mode of the auxiliary data; and inserting the data frame ID into the corresponding data frame of the auxiliary data.
Optionally, converting the digital video image data carrying the video frame ID and the ancillary data into an analog data signal comprises at least one of: converting the digital video image data carrying the video frame ID and the auxiliary data carrying the data frame ID into a first analog data signal, wherein the first analog data signal comprises: the converted digital video image data and the converted auxiliary data; converting the digital video image data carrying the video frame ID into a second analog data signal; converting the auxiliary data carrying the data frame ID into a third analog data signal.
Optionally, inserting the data frame ID into the data frame of the corresponding auxiliary data includes: dividing the auxiliary data carrying the data frame ID into one data packet per M bits, defining the data frame ID as data with fixed length Nbit, inserting the data frame ID into the Nth position segment in front of each data packet, and inserting the auxiliary data into the position segments from (N + 1) th to (M), wherein M and N are integers more than 1, and M > N.
Optionally, inserting the video frame ID into the corresponding data frame of the digital video image data comprises: encoding the digital video image data according to the specified encoding rule of the composite video; the video frame ID is then inserted into a first vertical blanking area and/or a first horizontal blanking area of the encoded composite video data, wherein the vertical blanking area does not transmit active video lines and the horizontal blanking area does not transmit active video signals.
Optionally, before converting the auxiliary data carrying the video frame ID into an analog data signal, the method further comprises; inserting the ancillary data carrying the video frame ID into a second vertical blanking area and/or a second horizontal blanking area of the composite video data.
Optionally, the sending the analog data signal to a receiving end includes: and respectively transmitting the analog data signal after the digital video image data conversion and the analog data signal after the auxiliary data conversion to the receiving end through different frequency bands.
According to another embodiment of the present invention, there is also provided a receiving method of an analog data signal, including: converting a received analog data signal into digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; acquiring video frame Identification (ID) carried in the digital video image data and the auxiliary data, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data; establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID; and synchronously displaying the digital video image data and the auxiliary data according to the mapping relation.
Optionally, the obtaining the video frame identifier ID carried in the digital video image data and the auxiliary data includes: and acquiring a data frame ID carried in the auxiliary data, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, and the data frame ID is used for uniquely identifying each frame data of the auxiliary data.
Optionally, the establishing the mapping relationship between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID includes: acquiring a corresponding data frame of the digital video image according to the video frame ID; acquiring a data frame of the corresponding auxiliary data according to the data frame ID; and establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the corresponding relation between the video frame ID and the data frame ID.
Optionally, converting the received analog data signal into digital video image data and ancillary data comprises: converting the received analog data signal into composite video data; the acquiring the video frame identification ID carried in the digital video image data comprises: the video frame ID of the digital video image data is extracted from a first vertical blanking region and/or a first horizontal blanking region of the composite video data, wherein the vertical blanking region does not transmit active video lines and the horizontal blanking region does not transmit active video signals.
Optionally, after converting the received analog data signal into composite video data, the method further includes: extracting the ancillary data carrying the video frame ID from a second vertical blanking region and/or a second horizontal blanking region of the composite video data.
According to another embodiment of the present invention, there is also provided a transmission apparatus of an analog data signal, including: the device comprises a receiving module, a processing module and a display module, wherein the receiving module is used for receiving digital video image data and auxiliary data, and each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; a generating module, configured to generate a video frame identification ID, where the video frame ID is used to uniquely identify each frame of data of the digital video image data, and the video frame ID is used to uniquely identify each frame of data of the auxiliary data; an inserting module, configured to insert the video frame ID into a corresponding data frame of the digital video image data and a data frame of the auxiliary data; a first conversion module for converting the digital video image data carrying the video frame ID and the auxiliary data into analog data signals; and the sending module is used for sending the analog data signal to a receiving end.
According to another embodiment of the present invention, there is also provided a receiving apparatus of an analog data signal, including: the second conversion module is used for converting the received analog data signals into digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; an obtaining module, configured to obtain video frame identification IDs carried in the digital video image data and the auxiliary data, where the video frame ID is used to uniquely identify each frame data of the digital video image data, and the video frame ID is used to uniquely identify each frame data of the auxiliary data; the establishing module is used for establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID; and the display module is used for synchronously displaying the digital video image data and the auxiliary data according to the mapping relation.
According to another embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to another embodiment of the present invention, there is also provided an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps of any of the above method embodiments.
According to the embodiment of the invention, digital video image data and auxiliary data are received, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; generating a video frame identification ID, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data; inserting the video frame ID into the data frame of the corresponding digital video image data and the data frame of the auxiliary data; converting the digital video image data and the auxiliary data carrying the video frame ID into analog data signals; and sending the analog data signal to a receiving end. The video data and the auxiliary data are identified by setting the video frame ID, the video data frames and the auxiliary data can be in one-to-one correspondence, and the video frame ID, the video data and the auxiliary data are converted into analog data signals together for transmission, so that the problem that the auxiliary data and the video information cannot be synchronously transmitted in the analog video data processing in the prior art is solved, and the synchronous transmission of the auxiliary data and the video information is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware configuration of a mobile terminal of a transmission method of an analog data signal according to an embodiment of the present invention;
FIG. 2 is a flow chart of an alternative method of sending an analog data signal in an embodiment of the invention;
FIG. 3 is a flow chart of an alternative method of transmitting an analog data signal in accordance with an embodiment of the present invention;
fig. 4 is a flow chart of an alternative method of receiving an analog data signal in an embodiment of the present invention;
fig. 5 is a flow chart of an alternative method of receiving an analog data signal in an embodiment of the present invention;
fig. 6 is a block diagram of an alternative analog data signal transmitting apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an alternative analog data signal transmitting apparatus method according to an embodiment of the present invention;
fig. 8 is a block diagram of an alternative receiving apparatus for analog data signals according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an alternative receiving apparatus for analog data signals according to an embodiment of the present invention;
fig. 10 is a schematic diagram of an alternative video frame ID index according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking an example of the operation on a mobile terminal, fig. 1 is a hardware structure block diagram of the mobile terminal of a method for transmitting an analog data signal according to an embodiment of the present invention. As shown in fig. 1, the mobile terminal 10 may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, and optionally may also include a transmission device 106 for communication functions and an input-output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program and a module of application software, such as a computer program corresponding to the method for acquiring the scheduled throughput in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
The embodiment of the invention provides a method for sending an analog data signal. Fig. 2 is a flowchart of an alternative method for sending an analog data signal according to an embodiment of the present invention, and as shown in fig. 2, the method includes:
step S202, receiving digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
step S204, generating a video frame identification ID, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data;
step S206, inserting the video frame ID into the data frame of the corresponding digital video image data and the data frame of the auxiliary data;
step S208, converting the digital video image data and the auxiliary data carrying the video frame ID into analog data signals;
step S210, sending the analog data signal to the receiving end.
Receiving digital video image data and auxiliary data through the method, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation; generating a video frame identification ID, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data; inserting the video frame ID into the data frame of the corresponding digital video image data and the data frame of the auxiliary data; converting the digital video image data and the auxiliary data carrying the video frame ID into analog data signals; and sending the analog data signal to a receiving end. The video data and the auxiliary data are identified by setting the video frame ID, the video data frames and the auxiliary data can be in one-to-one correspondence, and the video frame ID, the video data and the auxiliary data are converted into analog data signals together for transmission, so that the problem that the auxiliary data and the video information cannot be synchronously transmitted in the analog video data processing in the prior art is solved, and the synchronous transmission of the auxiliary data and the video information is realized.
Optionally, generating the video frame identification ID comprises: a video frame ID is generated based on frame synchronization information of the digital video image data, wherein the frame synchronization information indicates a start position and/or an end position of each frame of the digital video image data. Digital video data, which is usually stored or transmitted in a particular coding format continuously, may be understood as a digital video data stream, and video data needs to have frame boundary information, because many applications are processed in units of frames, which requires digital video data streams to have frame synchronization information for indicating the end of the previous frame and the start of the next frame, for example, ITU-r.bt1120 uses image timing reference codes (SAV and EAV) for frame synchronization headers, extensions, and digital video data streams of other protocols or formats will have corresponding frame synchronization information.
Optionally, generating the video frame ID according to the frame synchronization information of the digital video image data comprises: acquiring a time stamp corresponding to each frame of data of the digital video image data; the time stamp is set to the video frame ID.
Optionally, inserting the video frame ID into the data frame of the corresponding auxiliary data comprises: generating a data frame ID according to the video frame ID, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, the data frame ID is used for uniquely identifying each frame data of the auxiliary data, and the encoding format of the data frame ID is matched with the packaging mode of the auxiliary data; the data frame ID is inserted into the data frame of the corresponding auxiliary data.
Optionally, converting the digital video image data carrying the video frame ID and the ancillary data into an analog data signal comprises at least one of: converting the digital video image data carrying the video frame ID and the auxiliary data carrying the data frame ID into a first analog data signal, wherein the first analog data signal comprises: the converted digital video image data and the converted auxiliary data; converting the digital video image data carrying the video frame ID into a second analog data signal; converting the auxiliary data carrying the data frame ID into a third analog data signal.
Optionally, inserting the data frame ID into the data frame of the corresponding auxiliary data comprises: the method comprises the steps of dividing auxiliary data carrying data frame IDs into every M bits of data packets, defining the data frame IDs as data with fixed length of N bits, inserting the data frame IDs into the Nth position segment in front of each data packet, and inserting the auxiliary data into the position segments from (N + 1) th to (M), wherein M and N are integers larger than 1, and M > N.
Optionally, inserting the video frame ID into the corresponding data frame of the digital video image data comprises: encoding the digital video image data according to the specified encoding rule of the composite video; the video frame ID is inserted into a first vertical blanking area and/or a first horizontal blanking area of the encoded composite video data, wherein the vertical blanking area does not transmit active video lines and the horizontal blanking area does not transmit active video signals.
Optionally, before converting the auxiliary data carrying the video frame ID into an analog data signal, the method further comprises; the auxiliary data carrying the video frame ID is inserted into the second vertical blanking area and/or the second horizontal blanking area of the composite video data.
Optionally, the sending the analog data signal to the receiving end includes: and respectively transmitting the analog data signal after the digital video image data conversion and the analog data signal after the auxiliary data conversion to a receiving end through different frequency bands.
Fig. 3 is a flow chart of an alternative method for transmitting an analog data signal according to an embodiment of the present invention, as shown in fig. 3, the method includes:
s301, receiving digital video image data and synchronous auxiliary data;
s302, generating a video frame ID;
s303, converting the video frame ID to generate a data frame ID;
s304, inserting the auxiliary data into the data frame ID, and packaging;
s305, the digital video image data is coded according to coding rules conforming to food, the video frame ID is inserted into a part of vertical/horizontal blanking areas, and the auxiliary data is coded according to other appointed modes;
and S306, converting the digital video image data into analog data and transmitting the analog data. In order to meet the transmission requirements of the analog composite video signal, digital-to-analog conversion is performed and the signal is transmitted.
The input of the sending unit is digital video image data and synchronous auxiliary data thereof, and it should be noted that the auxiliary data sent to the sending end and the digital video image data are necessarily synchronous, and as a transmission system, only two kinds of input data are ensured to be synchronous, and the received data can be synchronous, that is, the invention introduces a method and a device for synchronously transmitting video and auxiliary data, and does not care about the synchronous generation process of the video and auxiliary data.
It should be noted that in some applications, there may be some frames of digital video image data without auxiliary data, and special data codes may be used as auxiliary data synchronized with the frames of digital video image data, which means that the auxiliary data is empty, i.e. a false auxiliary data is made.
The output of the sending end is an analog composite video signal which is suitable for being transmitted on a channel of an analog video monitoring system.
Generating the video frame ID includes: a video frame ID is generated based on frame synchronization information of the digital video image data. Since in most applications the accuracy of the synchronization of the auxiliary data and the video is only at the frame level, i.e. it is only necessary to know which frame of video data the auxiliary data is related to, in this step the video data can be divided into units in frames based on the frame synchronization information of the video data, each unit generating a unique identity information, i.e. a video frame ID.
The video frame ID conversion, generating the data frame ID may include: since the auxiliary data and the digital video image data are synchronized, the auxiliary data follows the frame synchronization information of the video data, and can also be divided into units in units of frames, each unit generates a unique identity information, namely a data frame ID, and the auxiliary data frame and the video frame are synchronized at the moment; the video data has independent and obvious frame synchronization information, so that the data frame ID can be generated by converting the video frame ID. It should be noted that the auxiliary data may already be a packetized data stream, and the conversion from the video frame ID to the data frame ID is to prevent the video frame ID from destroying the original packetized format of the auxiliary data, so that the encoding of the data frame ID is related to the original packetized details of the auxiliary data.
The auxiliary data is inserted into the data frame ID, and the packing may include: and inserting the data frame ID into the auxiliary data according to a certain rule, and packaging. The auxiliary data stream processed by this step has the frame ID information of the corresponding video, and the auxiliary data and the video information can be transmitted independently.
The digital video image data is coded according to the coding rule of the composite video, the video frame ID is inserted into part of the vertical/horizontal blanking areas, the auxiliary data packet inserted with the data frame ID can be transmitted in the rest of the vertical blanking area and the horizontal blanking area, and can also be transmitted in other frequency bands in a frequency division multiplexing mode, namely, the auxiliary data is coded according to other appointed modes.
It should be noted that the vertical blanking area and the horizontal blanking area of the composite video signal and the effective video image area together constitute a frame of composite video signal, so that the transmission of the video frame ID in the vertical blanking area and the horizontal blanking area can ensure the strict frame-level synchronization of the video frame ID and the video data. The auxiliary data and the video information may be transmitted independently, and therefore, the transmission method of the auxiliary data is not limited herein.
The embodiment of the invention also provides a method for receiving the analog data signal. Fig. 4 is a flowchart of an alternative method for receiving an analog data signal according to an embodiment of the present invention, and as shown in fig. 4, the method includes:
step S402, converting the received analog data signal into digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
step S404, acquiring video frame identification ID carried in the digital video image data and the auxiliary data, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data;
step S406, establishing a mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID;
step S408, the digital video image data and the auxiliary data are synchronously displayed according to the mapping relation.
Optionally, the obtaining the video frame identifier ID carried in the digital video image data and the auxiliary data includes: and acquiring a data frame ID carried in the auxiliary data, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, and the data frame ID is used for uniquely identifying each frame data of the auxiliary data.
Optionally, the establishing the mapping relationship between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID includes: acquiring a corresponding data frame of the digital video image according to the video frame ID; acquiring a data frame of the corresponding auxiliary data according to the data frame ID; and establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the corresponding relation between the video frame ID and the data frame ID.
Optionally, converting the received analog data signal into digital video image data and ancillary data comprises: converting the received analog data signal into composite video data; the acquiring the video frame identification ID carried in the digital video image data comprises: the video frame ID of the digital video image data is extracted from a first vertical blanking region and/or a first horizontal blanking region of the composite video data, wherein the vertical blanking region does not transmit active video lines and the horizontal blanking region does not transmit active video signals.
Optionally, after converting the received analog data signal into composite video data, the method further includes: extracting the ancillary data carrying the video frame ID from a second vertical blanking region and/or a second horizontal blanking region of the composite video data.
Fig. 5 is a flowchart of an alternative method for receiving an analog data signal according to an embodiment of the present invention, and as shown in fig. 5, the method includes:
s501, analog-to-digital conversion: the input of the receiving end is an analog composite video signal; the output of the receiving end is digital video image data and synchronous auxiliary data thereof; that is, the digital video image data and the auxiliary data still keep a synchronous relationship through the transmission and the processing from the transmitting end to the receiving end of the invention.
S502, decoding the digitized composite video data into digital video image data according to the encoding rule of the composite video, and extracting the video frame ID in the specific vertical/horizontal blanking region according to the predetermined rule, which can refer to the related method described above.
S503, extracting the auxiliary data packet inserted with the data frame ID according to the method appointed by the sending end, wherein the extraction method corresponds to the sending end, namely if the sending end adopts a time division multiplexing mode and transmits in the residual vertical blanking area or horizontal blanking area, the decoder extracts in the residual vertical blanking area or horizontal blanking area, and if the sending end transmits in other frequency bands through a frequency division multiplexing mode, the decoder extracts in other frequency bands.
S504, according to the convention with the sending end, according to the attached data inserting data frame ID and the packaging rule, reverse operation is carried out, and the data frame ID and the attached data are extracted.
And S505, according to the convention with the sending end, generating a rule of a data frame ID according to the video frame ID conversion, and performing inverse operation to obtain the ID of the video frame corresponding to the auxiliary data.
S506, the video frame ID and the digital video image data are stored according to a set format, namely, a mapping relation between the video frame ID and the corresponding frame of digital video image data is established, and the synchronization relation between the video frame ID and the corresponding frame of digital video image data is ensured not to be lost.
S507, the video frame ID and the auxiliary data corresponding to the auxiliary data are stored according to a predetermined format, that is, a mapping relationship between the video frame ID converted from the data frame ID through the step S405 and the auxiliary data of the corresponding frame is established, so as to ensure that the synchronization relationship between the video frame ID and the auxiliary data is not lost.
And S508, establishing indexes of the video frame IDs corresponding to the video frame IDs and the auxiliary data, and conveniently, quickly and economically carrying out searching, matching judgment and other operations.
S509, matching the video frame ID with the video frame ID corresponding to the auxiliary data, and establishing a mapping relation between the auxiliary data and the digital video image data. As explained further herein, it is noted that (i) the digital video image data of each frame has a unique video frame ID corresponding thereto, (ii) the digital video image data of each frame has a segment of auxiliary data corresponding thereto, (iii) each segment of auxiliary data has a unique data frame ID corresponding thereto, and the data frame ID corresponds to the video frame ID of the digital video image data of the frame corresponding to the auxiliary data one-to-one, so that (ii) and (iii) it is possible to obtain (iv) each segment of auxiliary data has a video ID of the digital video image data of the frame corresponding thereto, and at the receiving end, it is known through the steps of S501-S508 that the correspondence relationship of (i) - (iii) still exists and the mapping is not lost from the transmitting end to the receiving end, so that the steps need to be performed according to (i) and (iv), when the mapping relationship between each piece of auxiliary data and the corresponding digital video image data of the frame is desired, only the matching operation is performed on the video frame IDs of the auxiliary data and the frame are the same, which indicates that the auxiliary data and the video frame IDs of the video frame IDs are in one-to-one correspondence, i.e., synchronous.
In step S510, the synchronized digital video image data and the synchronized auxiliary data thereof are obtained in step S509 and outputted.
According to another embodiment of the present invention, there is also provided a transmitting apparatus for an analog data signal, which is used for implementing any one of the above method embodiments, and the content that has been described herein is not repeated here. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 6 is a block diagram of an alternative analog data signal transmitting apparatus according to an embodiment of the present invention, as shown in fig. 6, the apparatus including:
a receiving module 602, configured to receive digital video image data and auxiliary data, where each frame of data of the auxiliary data has a one-to-one mapping relationship with each frame of data of the digital video image data;
a generating module 604, configured to generate a video frame identification ID, where the video frame ID is used to uniquely identify each frame data of the digital video image data, and the video frame ID is used to uniquely identify each frame data of the auxiliary data;
an inserting module 606 for inserting the video frame ID into the data frame of the corresponding digital video image data and the data frame of the auxiliary data;
a first conversion module 608 for converting the digital video image data carrying the video frame ID and the ancillary data into analog data signals;
the sending module 610 is configured to send the analog data signal to a receiving end.
Fig. 7 is a schematic structural diagram of an alternative method for transmitting an analog data signal according to an embodiment of the present invention, and as shown in fig. 7, the transmitting apparatus according to the embodiment of the present invention includes the following modules:
and the video frame ID generating module generates a video frame ID according to the frame synchronization information of the digital video image data. In one embodiment, if digital Video image data is input through BT656 or BT1120 digital image interface, the Video frame ID generation module can parse the Video timing reference codes ((Start of Active Video, SAV) and (End of Active Video, EAV) in the Video data stream to determine the Start and End of the Video frame, and then generate the Video frame ID for each individual Video frame.
The data frame generation module is used for carrying out transformation according to the video frame ID generated in the step (A) to generate a data frame ID; it should be noted that, the auxiliary data before the data frame ID is inserted may already be the data stream that is encapsulated and packaged, so that the original encapsulated and packaged format cannot be destroyed by the encapsulation and packaging again after the data frame ID is inserted, so that the conversion from the video frame ID to the data frame ID is to prevent the original encapsulated and packaged format of the auxiliary data from being destroyed by the video frame ID, and the specific implementation manner is related to the details of the original encapsulation and packaging of the auxiliary data. For example, if the data flag of the auxiliary data is 0X00FF, then 0X00FF in the video frame ID will replace 0X00FF with other characters when converting to the data frame ID, and the specific transform code words have many mature references and will not be described in detail herein.
And the auxiliary data packaging module is used for receiving the video frame ID of the synchronous digital video image data and the corresponding auxiliary data, performing corresponding transformation on the corresponding video frame ID to generate a data frame ID, inserting the data frame ID into the auxiliary data according to a certain rule, and packaging.
An embodiment of a preferred encapsulation and packaging rule is to divide the auxiliary data into one packet per M bits, assuming that the data frame ID is data with a fixed length of N bits, insert the data frame ID into the nth position segment before each packet data, and insert the position segments from N +1 to M behind into the received auxiliary data, where M and N are integers greater than 1, and M > N, preferably M and N are integer multiples of 8, and the specific values are selected according to the application.
A composite video coding module for transmitting data in the vertical/horizontal blanking region, which codes the digital video image data according to the coding rule of the composite video, and inserts the video frame ID into a part of the vertical/horizontal blanking region for transmission, and the specific implementation can refer to the related method described above; the auxiliary data packet with the inserted data frame ID may be transmitted in the remaining vertical blanking area and horizontal blanking area, or may be transmitted in other frequency bands in a frequency division multiplexing manner, where it is required that the encoder must support data transmission in the vertical/horizontal blanking area for transmitting the video frame ID;
D/A conversion module DAC: and converting the coded digital data into an analog signal and then transmitting the analog signal.
According to another embodiment of the present invention, there is also provided a receiving apparatus for an analog data signal, which is used to implement any one of the above method embodiments, and the content that has been described herein is not repeated here. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 8 is a block diagram of an alternative receiving apparatus for an analog data signal according to an embodiment of the present invention, as shown in fig. 8, the apparatus includes:
a second conversion module 802, configured to convert the received analog data signal into digital video image data and auxiliary data, where each frame of the auxiliary data has a one-to-one mapping relationship with each frame of the digital video image data;
an obtaining module 804, configured to obtain video frame identification IDs carried in the digital video image data and the auxiliary data, where the video frame ID is used to uniquely identify each frame data of the digital video image data, and the video frame ID is used to uniquely identify each frame data of the auxiliary data;
an establishing module 806, configured to establish the mapping relationship between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID;
and a display module 808, configured to synchronously display the digital video image data and the auxiliary data according to the mapping relationship.
Fig. 9 is a schematic structural diagram of an alternative receiving apparatus for analog data signals according to an embodiment of the present invention, and as shown in fig. 9, the receiving apparatus according to the embodiment of the present invention includes the following modules:
(A) analog-to-digital conversion module ADC: converting the analog composite video signal to a digital format for decoding by a digital decoder;
(B) a composite video decoding module supporting data transmission in vertical/horizontal blanking regions: for specific implementation, reference may be made to the above-described related method, which decodes the digitized composite video data into digital video image data according to the encoding rule of the composite video, and extracts the video frame ID in a specific vertical/horizontal blanking region according to a predetermined rule; the decoder extracts in the residual vertical blanking area and/or horizontal blanking area if the sending end adopts time division multiplexing mode and transmits in the residual vertical blanking area and/or horizontal blanking area, and extracts in other frequency band if the sending end transmits in other frequency band by frequency division multiplexing mode, thereby requiring the decoder to support extracting data in the vertical/horizontal blanking area for extracting video frame ID and ensuring that the digital video image data and video frame ID output by the decoding module are strictly synchronous;
(C) data frame ID and attached data extraction module: and the auxiliary data packet inserted with the data frame ID and output by the decoding module is subjected to inverse operation according to the convention of the transmitting end and the rules of inserting the data frame ID and packaging the auxiliary data, and the data frame ID and the auxiliary data are extracted.
(D) The data frame ID-to-video frame ID conversion module generates a rule of a data frame ID according to convention with a sending end and video frame ID conversion, and performs inverse operation to obtain an ID of a video frame corresponding to the auxiliary data;
(E) a cache module: the storage of the video frame ID and the digital video image data according to a set format and the storage of the video frame ID and the accessory data corresponding to the accessory data according to the set format are realized, and meanwhile, the establishment of the index of the video frame ID and the video frame ID corresponding to the accessory data is realized by software.
The digital video image data obtained by the module (B) and the video frame ID thereof in synchronization, the auxiliary data obtained by the module (C), and the video frame ID corresponding to the auxiliary data obtained by the module (D) are respectively cached in different storage areas according to a specific format, and the specific implementation is quite mature, for example, according to the system performance requirement, DDR SDRAM with different storage capacities can be adopted.
It should be noted that, a certain rule exists in the data stored in the common cache module, that is, the data is stored in units of BLOCKs (BLOCK), so that the corresponding data can be found according to the storage address, and the storage address of the data in a specific order can be found according to the corresponding regular pattern segment.
Fig. 10 is a schematic diagram of an alternative video frame ID index according to an embodiment of the present invention, and as shown in fig. 10, it is assumed that digital video image data and auxiliary data of L frames (L is an integer greater than 1) and corresponding video frame IDs are stored, so that operations such as searching, matching judgment and the like can be performed conveniently, quickly and economically.
(F) Digital video image data and ancillary data synchronization module: (a) reading a video frame ID of the digital video image data; (b) reading a video frame ID corresponding to the auxiliary data; (c) comparing the video data with the corresponding video frame ID of the auxiliary data, if the video data and the corresponding video frame ID of the auxiliary data are matched, the video data and the auxiliary data are synchronous; if the two are not matched, further searching for a match is required, and specific embodiments can refer to any mature matching searching mode.
And after the matching operation is finished, the mapping relation between each section of auxiliary data and the digital video image data of the corresponding frame can be obtained, and as long as the matching operation is carried out on the video frame IDs of the auxiliary data and the corresponding frame, the two video frame IDs are the same, so that the two video frame IDs are in one-to-one correspondence, namely synchronous, and the digital video image data and the auxiliary data of the corresponding addresses can be output.
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, adjusting the coordinate position of the focusing motor to a first position, wherein the first position corresponds to the current object distance, and the current object distance is the distance between the current focused target object and the camera lens;
s2, after the focusing motor is fixed at the first position, the coordinate position of the image sensor is adjusted by the automatic back focus adjusting module until the definition of the current image reaches the maximum value;
and S3, fixing the image sensor at a second position, wherein the second position is the coordinate position of the image sensor when the current image definition reaches the maximum value.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, adjusting the coordinate position of the focusing motor to a first position, wherein the first position corresponds to the current object distance, and the current object distance is the distance between the current focused target object and the camera lens;
s2, after the focusing motor is fixed at the first position, the coordinate position of the image sensor is adjusted by the automatic back focus adjusting module until the definition of the current image reaches the maximum value;
and S3, fixing the image sensor at a second position, wherein the second position is the coordinate position of the image sensor when the current image definition reaches the maximum value.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and optional implementation manners, and details of this embodiment are not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (18)
1. A method for transmitting an analog data signal, comprising:
receiving digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
generating a video frame Identification (ID), wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data;
inserting the video frame ID into a corresponding data frame of the digital video image data and a data frame of the auxiliary data;
converting the digital video image data and the ancillary data carrying the video frame ID into analog data signals;
and sending the analog data signal to a receiving end.
2. The method of claim 1, wherein generating a video frame Identification (ID) comprises:
and generating the video frame ID according to frame synchronization information of the digital video image data, wherein the frame synchronization information is used for indicating the starting position and/or the ending position of each frame of the digital video image data.
3. The method of claim 2, wherein generating the video frame ID based on frame synchronization information of the digital video image data comprises:
acquiring a time stamp corresponding to each frame of data of the digital video image data;
setting the timestamp to the video frame ID.
4. The method of claim 1, wherein inserting the video frame ID into the corresponding data frame of the ancillary data comprises:
generating a data frame ID according to the video frame ID, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, the data frame ID is used for uniquely identifying each frame data of the auxiliary data, and the encoding format of the data frame ID is matched with the packaging mode of the auxiliary data;
and inserting the data frame ID into the corresponding data frame of the auxiliary data.
5. The method of claim 4, wherein converting the digital video image data and the ancillary data carrying the video frame ID into an analog data signal comprises at least one of:
converting the digital video image data carrying the video frame ID and the auxiliary data carrying the data frame ID into a first analog data signal, wherein the first analog data signal comprises: the converted digital video image data and the converted auxiliary data;
converting the digital video image data carrying the video frame ID into a second analog data signal;
converting the auxiliary data carrying the data frame ID into a third analog data signal.
6. The method of claim 4, wherein inserting the data frame ID into the corresponding data frame of the auxiliary data comprises:
dividing the auxiliary data carrying the data frame ID into every M bits of data packets, defining the data frame ID as data with fixed length of N bits, inserting the data frame ID into the Nth position segment in front of each data packet, and inserting the auxiliary data into the position segments from (N + 1) th to (M), wherein M and N are integers more than 1, and M > N.
7. The method of claim 1, wherein inserting the video frame ID into the corresponding data frame of the digital video image data comprises:
encoding the digital video image data according to the specified encoding rule of the composite video;
the video frame ID is then inserted into a first vertical blanking area and/or a first horizontal blanking area of the encoded composite video data, wherein the vertical blanking area does not transmit active video lines and the horizontal blanking area does not transmit active video signals.
8. The method of claim 7, wherein prior to converting the ancillary data carrying the video frame ID to an analog data signal, the method further comprises;
inserting the ancillary data carrying the video frame ID into a second vertical blanking area and/or a second horizontal blanking area of the composite video data.
9. The method of any of claims 1 to 8, wherein sending the analog data signal to a receiving end comprises:
and respectively transmitting the analog data signal after the digital video image data conversion and the analog data signal after the auxiliary data conversion to the receiving end through different frequency bands.
10. A method of receiving an analog data signal, comprising:
converting a received analog data signal into digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
acquiring video frame Identification (ID) carried in the digital video image data and the auxiliary data, wherein the video frame ID is used for uniquely identifying each frame data of the digital video image data, and the video frame ID is used for uniquely identifying each frame data of the auxiliary data;
establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID;
and synchronously displaying the digital video image data and the auxiliary data according to the mapping relation.
11. The method of claim 10, wherein obtaining the video frame identification ID carried in the digital video image data and the ancillary data comprises:
and acquiring a data frame ID carried in the auxiliary data, wherein the data frame ID and the video frame ID have a one-to-one correspondence relationship, and the data frame ID is used for uniquely identifying each frame data of the auxiliary data.
12. The method of claim 11, wherein establishing the mapping of data frames of the digital video image to data frames of the auxiliary data based on the video frame ID comprises:
acquiring a corresponding data frame of the digital video image according to the video frame ID;
acquiring a data frame of the corresponding auxiliary data according to the data frame ID;
and establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the corresponding relation between the video frame ID and the data frame ID.
13. The method of claim 10,
converting the received analog data signal into digital video image data and ancillary data includes:
converting the received analog data signal into composite video data;
the acquiring the video frame identification ID carried in the digital video image data comprises:
the video frame ID of the digital video image data is extracted from a first vertical blanking region and/or a first horizontal blanking region of the composite video data, wherein the vertical blanking region does not transmit active video lines and the horizontal blanking region does not transmit active video signals.
14. The method of claim 13, wherein after converting the received analog data signal to composite video data, the method further comprises:
extracting the ancillary data carrying the video frame ID from a second vertical blanking region and/or a second horizontal blanking region of the composite video data.
15. A transmission apparatus for an analog data signal, comprising:
the device comprises a receiving module, a processing module and a display module, wherein the receiving module is used for receiving digital video image data and auxiliary data, and each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
a generating module, configured to generate a video frame identification ID, where the video frame ID is used to uniquely identify each frame of data of the digital video image data, and the video frame ID is used to uniquely identify each frame of data of the auxiliary data;
an inserting module, configured to insert the video frame ID into a corresponding data frame of the digital video image data and a data frame of the auxiliary data;
a first conversion module for converting the digital video image data carrying the video frame ID and the auxiliary data into analog data signals;
and the sending module is used for sending the analog data signal to a receiving end.
16. An apparatus for receiving an analog data signal, comprising:
the second conversion module is used for converting the received analog data signals into digital video image data and auxiliary data, wherein each frame data of the auxiliary data and each frame data of the digital video image data have a one-to-one mapping relation;
an obtaining module, configured to obtain video frame identification IDs carried in the digital video image data and the auxiliary data, where the video frame ID is used to uniquely identify each frame data of the digital video image data, and the video frame ID is used to uniquely identify each frame data of the auxiliary data;
the establishing module is used for establishing the mapping relation between the data frame of the digital video image and the data frame of the auxiliary data according to the video frame ID;
and the display module is used for synchronously displaying the digital video image data and the auxiliary data according to the mapping relation.
17. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 14 when executed.
18. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 14.
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