CN108076351B - Audio and video data encoding method and device and electronic equipment - Google Patents
Audio and video data encoding method and device and electronic equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses an audio and video data coding method, an audio and video data coding device and electronic equipment, relates to a coding technology, and can improve the quality of coded information. The audio and video data coding method comprises the following steps: analyzing the received audio and video data, and acquiring coding parameter information contained in an information header obtained by analysis, wherein the coding parameter information comprises coding resolution; and coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information. The invention is suitable for self-adaptive coding of courseware information of a recording and broadcasting system.
Description
Technical Field
The present invention relates to encoding technologies, and in particular, to an audio and video data encoding method and apparatus, and an electronic device.
Background
With the continuous development of high definition digital technology, computer communication and internet technology, electronic devices, such as smart mobile phones, personal digital assistants, palm top computers and notebook computers, are increasingly used. Among them, Multimedia audio/Video interfaces, such as Video Graphics Array (VGA) Interface and High Definition Multimedia Interface (HDMI), have become indispensable interfaces in modern electronic devices.
With the popularization of the internet technology, school teaching modes are also developed from a simple classroom teaching mode to a multi-mode teaching mode combined with an internet classroom. By recording each course into courseware information (file) and uploading the courseware information to the network, students can carry out remote learning, interactive learning and the like through network live broadcasting and after-class on-demand, and teachers can also watch, study and study at any time and any place.
At present, a recording and broadcasting system is generally used for recording courseware information, and the recording and broadcasting system mainly comprises a recording and broadcasting host, a detection camera and an image camera and is used for realizing video recording and remote teaching on classroom teaching. Wherein, the recording and broadcasting host completes the functions of guiding broadcasting and video recording; the detection camera realizes the detection of teacher behaviors and student behaviors; the video camera provides video pictures of teachers and students, the detection camera transmits detected behaviors and video frames shot by the video camera to the recording and broadcasting host, and the recording and broadcasting host conducts broadcasting according to input of the played courseware, such as PPT, the detection camera and the video camera, and completes video recording. For example, in teaching, when a teacher uses an electronic device to demonstrate PPT or other course resources, an image camera captures the PPT or other course resources, a detection camera acquires audio for a teacher to ask questions and students to answer or discuss, and a recording host encodes video captured by the image camera and audio acquired by the detection camera, so that broadcasting guidance and video recording are completed, courseware information is obtained, and courseware information in a video format is output through a VGA/HDMI interface.
However, in the current audio/video data coding method based on the recording and broadcasting system, a coding method with fixed coding resolution is adopted. That is, no matter what the original encoding resolution of the information (e.g., PPT or other course resource presented by the electronic device) input to the VGA/HDMI interface of the recording and broadcasting host is, the recording and broadcasting host always performs encoding output according to a preset fixed encoding resolution. In the recording and broadcasting system, a teacher often carries a notebook computer when teaching, the notebook computer is connected with a recording and broadcasting host to perform PPT broadcasting, different notebook computers have different coding resolutions, and the VGA output resolution of each notebook computer is fixed through the coding of the recording and broadcasting host, so that the VGA picture input into the high-resolution notebook computer can be blurred after being coded by the recording and broadcasting host by the conventional audio and video data coding method, the quality of coded information is low, the later use is seriously affected, for example, the later-period playing picture is rough, and the playing quality is not high.
Disclosure of Invention
In view of this, embodiments of the present invention provide an audio and video data encoding method, an apparatus, and an electronic device, which can improve the quality of encoded information, so as to solve the problem of low quality of encoded high-resolution information caused by encoding with a fixed resolution in the existing audio and video data encoding method.
In a first aspect, an embodiment of the present invention provides an audio and video data encoding method, including:
analyzing the received audio and video data, and acquiring coding parameter information contained in an information header obtained by analysis, wherein the coding parameter information comprises coding resolution;
and coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information.
With reference to the first aspect, in a first implementation manner of the first aspect, the method further includes:
transmitting the encoded audio and video data to a preset network preview buffer area
With reference to the first aspect, in a second implementation manner of the first aspect, the method further includes:
and storing the coded audio and video data.
With reference to the first aspect, the first or second implementation manner of the first aspect, in a third implementation manner of the first aspect, before the parsing the received audio-video data, the method further includes:
configuring the encoding resolution attribute of a recording and broadcasting host of received video data, wherein the encoding resolution attribute comprises encoding resolution and an encoding configuration mode, and the encoding configuration mode comprises an adaptive mode and a fixed mode.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the encoding, according to the encoding parameter information, the audio/video data subjected to analog-to-digital conversion includes:
acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data; if the encoding configuration mode in the encoding resolution attribute is judged to be the self-adaptive mode, comparing the encoding resolution in the encoding parameter information with the encoding resolution in the configured encoding resolution attribute;
if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1;
obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute;
and calculating the product of the coding resolution in the coding parameter information and the self-adaptive coefficient, and coding the audio and video data subjected to analog-to-digital conversion according to the product.
With reference to the fourth implementation manner of the first aspect, in a fifth implementation manner of the first aspect, before the parsing the received audio-video data, the method further includes:
detecting a coding resolution attribute set on electronic equipment connected to a recording and broadcasting host for receiving audio and video data, wherein the coding resolution attribute comprises a coding resolution;
updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
With reference to the third implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the encoding, according to the encoding parameter information, the audio/video data subjected to analog-to-digital conversion includes:
acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data;
if the encoding configuration mode in the encoding resolution attribute is judged to be a fixed mode, then
And selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
In a second aspect, an embodiment of the present invention provides an audio/video data encoding device, including: a coding parameter information acquisition module and a coding module, wherein,
the encoding parameter information acquisition module is used for analyzing the received audio and video data and acquiring encoding parameter information contained in an information header obtained by analysis, wherein the encoding parameter information comprises encoding resolution;
and the coding module is used for coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information.
With reference to the second aspect, in a first implementation manner of the second aspect, the apparatus further includes:
and the remote storage module is used for transmitting the coded audio and video data to a preset network preview buffer area.
With reference to the second aspect, in a second implementation manner of the second aspect, the apparatus further includes:
and the local storage module is used for storing the coded audio and video data.
With reference to the second aspect, the first or second implementation manner of the second aspect, in a third implementation manner of the second aspect, the apparatus further includes:
the analog-to-digital conversion module is used for configuring the encoding resolution attribute of a recording and broadcasting host which receives audio and video data, wherein the encoding resolution attribute comprises encoding resolution and an encoding configuration mode, and the encoding configuration mode comprises an adaptive mode and a fixed mode.
With reference to the third implementation manner of the second aspect, in a fourth implementation manner of the second aspect, the encoding module includes: an attribute obtaining unit, a coefficient searching unit and an encoding unit, wherein,
the attribute acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a coefficient searching unit, configured to compare an encoding resolution in the encoding parameter information with an encoding resolution in the configured encoding resolution attribute; if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1; obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute;
and the coding unit is used for calculating the product of the coding resolution in the coding parameter information and the self-adaptive coefficient and coding the audio and video data subjected to analog-to-digital conversion according to the product.
With reference to the fourth embodiment of the second aspect, in a fifth embodiment of the second aspect, the apparatus further comprises:
the recording and broadcasting system comprises a detection module, a recording and broadcasting host and a control module, wherein the detection module is used for detecting a coding resolution attribute which is set on electronic equipment connected to the recording and broadcasting host for receiving audio and video data, and the coding resolution attribute comprises a coding resolution; updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
With reference to the third implementation manner of the second aspect, in a sixth implementation manner of the second aspect, the encoding module includes: a fixed coding resolution acquisition unit, a judgment unit and an audio/video data coding unit, wherein,
the fixed coding resolution acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a judging unit, configured to notify the audio/video data encoding unit if the encoding configuration mode in the encoding resolution attribute is determined to be a fixed mode;
and the audio and video data coding unit is used for selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes: the device comprises a shell, a processor, a memory, a circuit board and a power circuit, wherein the circuit board is arranged in a space enclosed by the shell, and the processor and the memory are arranged on the circuit board; a power supply circuit for supplying power to each circuit or device of the electronic apparatus; the memory is used for storing executable program codes; the processor reads the executable program codes stored in the memory to run programs corresponding to the executable program codes, and is used for executing any one of the audio and video data coding methods.
According to the audio and video data encoding method, device and electronic equipment provided by the embodiment of the invention, the received audio and video data are analyzed, and encoding parameter information contained in an information header obtained by analysis is obtained, wherein the encoding parameter information comprises encoding resolution; the audio and video data subjected to analog-to-digital conversion are coded according to the coding parameter information, so that the quality of the coded information can be improved, and the problem that the quality of the coded high-resolution information is low due to the fact that the high-resolution information is coded by adopting a fixed resolution in the existing audio and video data coding method is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an audio and video data encoding method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an audio and video data encoding method according to a second embodiment of the present invention;
FIG. 3 is a block diagram of an apparatus for encoding audiovisual data according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of an electronic device according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow diagram of an audio and video data encoding method according to an embodiment of the present invention, and as shown in fig. 1, the method according to the embodiment may include:
in this embodiment, as an optional embodiment, before analyzing the received audio and video data, the method further includes:
configuring the encoding resolution attribute of a recording and broadcasting host of received video data, wherein the encoding resolution attribute comprises encoding resolution and an encoding configuration mode, and the encoding configuration mode comprises an adaptive mode and a fixed mode.
In this embodiment, as an optional embodiment, the encoding parameter information includes: the encoding resolution. As still another alternative embodiment, the encoding parameter information may further include: image quality, frame rate, code rate.
In this embodiment, when the notebook computer is connected to the recording and broadcasting host, the courseware-related document information (courseware information) is input to the recording and broadcasting host through the VGA/HDMI interface, so that the recording and broadcasting host can be recoded and then played on the projector; or the recording and broadcasting host conducts guide broadcasting and video recording on pictures played by the projector and audio collected by other equipment. The recording and broadcasting host analyzes the received audio and video data, such as courseware information, and can acquire encoding parameter information, such as encoding resolution, contained in an information header obtained by analysis.
In this embodiment, as an optional embodiment, the received audio/video data includes: courseware information, behavior information to be detected by the detection camera, and video frame information captured by the image camera, or any combination thereof. The recording and broadcasting host, the detection camera and the image camera are time-synchronized in advance, for example, the detection camera and the image camera are started synchronously when courseware information is transmitted to the projector.
And step 102, encoding the audio and video data subjected to analog-to-digital conversion according to the encoding parameter information.
In this embodiment, encoding the audio/video data subjected to analog-to-digital conversion according to the encoding parameter information includes:
a11, acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data;
a12, if the encoding configuration mode in the encoding resolution attribute is judged to be the adaptive mode, comparing the encoding resolution in the encoding parameter information with the encoding resolution in the configured encoding resolution attribute; if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1; obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute;
in this embodiment, the database is pre-stored in the recording and broadcasting host, and includes, but is not limited to, a mapping table, and may be in other forms. The database stores the mapping relation between the coding resolution and the adaptive coefficient.
As an alternative embodiment, an adaptive coefficient mapping table may be set for information input by different electronic devices. For example, if the encoding resolution of the information input by the electronic device is greater than a preset encoding resolution first threshold, the adaptive coefficient mapped by the electronic device can be set to be less than 1; if the coding resolution of the information input by the electronic equipment is greater than the preset second threshold value of the coding resolution and less than or equal to the preset first threshold value of the coding resolution, the adaptive coefficient mapped by the electronic equipment can be set to be equal to 1; if the encoding resolution of the information input by the electronic equipment is less than or equal to the preset second threshold value of the encoding resolution, the adaptive coefficient mapped by the electronic equipment can be set to be greater than 1. As another alternative embodiment, the adaptive coefficient of the mapping may be equal to 1 regardless of the encoding resolution of the information input by the electronic device, which is not limited in this embodiment.
In this embodiment, as another optional embodiment, the encoding resolution attribute may also be implemented by modifying the relevant settings of the notebook computer, and when the notebook computer is connected to the recording and broadcasting host and outputs the courseware information to the recording and broadcasting host, the recording and broadcasting host automatically detects the encoding resolution attribute modified by the notebook computer.
In this embodiment, as an optional embodiment, before analyzing the received audio and video data, the method further includes:
detecting a coding resolution attribute set on electronic equipment connected to a recording and broadcasting host for receiving audio and video data, wherein the coding resolution attribute comprises a coding resolution;
updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
A13, calculating the product of the coding resolution in the coding parameter information and the adaptive coefficient, and coding the audio/video data subjected to analog-to-digital conversion according to the product.
In this embodiment, as an optional embodiment, if the encoding parameter information further includes information such as image quality, frame rate, and code rate, the audio/video data subjected to analog-to-digital conversion is encoded according to the product and information such as image quality, frame rate, and code rate included in the encoding parameter information.
In this embodiment, the resolution of the audio data output by the recording and playing host is obtained by decoding the data according to the product of the encoding resolution in the encoding parameter information and the self-adaptation, and finally, the resolution of the video displayed by the display device.
In this embodiment, as another optional embodiment, the encoding the audio/video data subjected to analog-to-digital conversion according to the encoding parameter information includes:
acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data;
if the encoding configuration mode in the encoding resolution attribute is judged to be a fixed mode, then
And selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
In this embodiment, by selecting a fixed encoding resolution, the resolution in the encoding parameter information is not selected any more.
In this embodiment, as an optional embodiment, the method further includes:
and transmitting the encoded audio and video data to a preset network preview buffer area.
In this embodiment, the encoded information (audio/video) may be transmitted to the network preview buffer, and if the extracted corresponding adaptive coefficient is not 1, which indicates that the re-encoded encoding resolution is changed, the information (audio/video) resolution in the network preview buffer is also changed accordingly. In the following, when the user browses by using the web previewer, the resolution of the read information (audio/video) is changed, so that the display effect of remote web preview is changed.
In this embodiment, as a further optional embodiment, the method further includes:
and storing the coded audio and video data.
In this embodiment, after the encoding resolution is changed, the resolution of the encoded information stored in the storage buffer is also changed accordingly, and in the subsequent application, the resolution of the information read from the storage buffer is also changed accordingly.
In this embodiment, for example, if there are four teachers, i.e., a teacher, b, c, and d, the students are given lessons using their own notebook computers, and the resolutions of the notebook computers are 1024 × 768, 1366 × 768, 720P, and 1080P, respectively. When the recording and broadcasting systems are used for teaching when the recording and broadcasting classrooms respectively come to the recording and broadcasting classrooms and are respectively accessed into the recording and broadcasting systems, the coding resolution of the classrooms is respectively and adaptively set to be 1024 x 768, 1366 x 768, 720P and 1080P. Thus, the courseware quality can be improved in a self-adaptive mode.
In the audio and video data encoding method of the embodiment, the received audio and video data is analyzed to obtain encoding parameter information contained in an information header obtained by analysis, wherein the encoding parameter information comprises encoding resolution; and coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information. Therefore, the final coding resolution of recoding can be modified by modifying the coding resolution in the coding parameter information, so that under the condition that different electronic equipment is accessed to the recording and broadcasting host, self-adaptive coding can be carried out according to the difference of the output resolution of each electronic equipment, the output picture effect is always consistent with the coding resolution of the electronic equipment, the optimization of the coding effect is realized, the VGA picture of a high-resolution notebook computer is prevented from becoming fuzzy after being coded by the recording and broadcasting host, the information quality after coding is effectively improved, the corresponding change of the output resolution along with the change of the input resolution can be realized, and the improvement of the output effect is facilitated.
Fig. 2 is a schematic flow diagram of an audio/video data encoding method according to an embodiment of the present invention, and as shown in fig. 2, the method according to the embodiment may include:
in this embodiment, the mobile terminal is an electronic device such as a PC that supports VGA format data transmission, for example, a notebook computer.
Step 202, analyzing the received data to obtain coding parameter information including coding resolution, frame rate and code rate;
step 203, encoding data according to the acquired encoding parameter information;
in this embodiment, the received data may also be encoded according to the encoding resolution, the frame rate, and the code rate that are stored after being input in advance.
Fig. 3 is a schematic structural diagram of an apparatus for encoding triple-tone video data according to an embodiment of the present invention, and as shown in fig. 3, the apparatus of the embodiment may include: an encoding parameter information obtaining module 31 and an encoding module 32, wherein,
the encoding parameter information acquiring module 31 is configured to analyze the received audio and video data, and acquire encoding parameter information included in an information header obtained through analysis, where the encoding parameter information includes an encoding resolution;
in this embodiment, the encoding parameter information obtaining module 31 analyzes the encoding resolution of the VGA/HDMI signal accessed by the recorded broadcast host according to the input information, and outputs the analyzed encoding resolution result to the encoding module.
In this embodiment, the audio/video data encoding device is a recording and broadcasting host (high-definition recording and broadcasting all-in-one machine), and a projector, a notebook computer, an image camera (a student video camera and a teacher tracking ball machine), a sound pickup (a sound box), a mobile terminal, and the like are connected to the outside of the recording and broadcasting host, thereby forming a recording and broadcasting system. The notebook computer is connected with the recorded broadcast host through a VGA, the image camera is connected with the recorded broadcast host through an SDI (Serial digital interface) line, the pickup is connected with the recorded broadcast host through an audio connecting line, and information coded by the recorded broadcast host can be output to a sound box, a projector and a mobile terminal.
As an alternative embodiment, the encoding parameter information includes: the encoding resolution. As still another alternative embodiment, the encoding parameter information may further include: image quality, frame rate, code rate.
In this embodiment, as an optional embodiment, the received audio/video data includes: courseware information, behavior information to be detected by the detection camera, and video frame information captured by the image camera, or any combination thereof. The recording and broadcasting host, the detection camera and the image camera are time-synchronized in advance, for example, the detection camera and the image camera are started synchronously when courseware information is transmitted to the projector.
And the coding module 32 is configured to code the audio/video data subjected to analog-to-digital conversion according to the coding parameter information.
In this embodiment, the encoding module 32 determines the encoding resolution to be used for the input information according to the configuration preset by the user and the encoding parameter information. The encoded information can be previewed remotely through a network and can also be stored in a hard disk.
In this embodiment, the encoding parameter information includes: encoding resolution, as an alternative embodiment, the encoding module 32 includes: an attribute obtaining unit, a coefficient searching unit, and an encoding unit (not shown in the figure), wherein,
the attribute acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a coefficient searching unit, configured to compare an encoding resolution in the encoding parameter information with an encoding resolution in the configured encoding resolution attribute; if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1; obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute;
in this embodiment, as an optional embodiment, an adaptive coefficient mapping table may be set for information input by different electronic devices. For example, if the encoding resolution of the information input by the electronic device is greater than a preset encoding resolution first threshold, the adaptive coefficient mapped by the electronic device can be set to be less than 1; if the coding resolution of the information input by the electronic equipment is greater than the preset second threshold value of the coding resolution and less than or equal to the preset first threshold value of the coding resolution, the adaptive coefficient mapped by the electronic equipment can be set to be equal to 1; if the encoding resolution of the information input by the electronic equipment is less than or equal to the preset second threshold value of the encoding resolution, the adaptive coefficient mapped by the electronic equipment can be set to be greater than 1. As another alternative embodiment, the adaptive coefficient of the mapping may be equal to 1 regardless of the encoding resolution of the information input by the electronic device, which is not limited in this embodiment.
And the coding unit is used for calculating the product of the coding resolution in the coding parameter information and the self-adaptive coefficient and coding the audio and video data subjected to analog-to-digital conversion according to the product.
As another alternative embodiment, the encoding module 32 includes: a fixed encoding resolution obtaining unit, a judging unit, and an audio/video data encoding unit (not shown in the figure), wherein,
the fixed coding resolution acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a judging unit, configured to notify the audio/video data encoding unit if the encoding configuration mode in the encoding resolution attribute is determined to be a fixed mode;
and the audio and video data coding unit is used for selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
In this embodiment, as an optional embodiment, the apparatus further includes:
and the remote storage module (not shown in the figure) is used for transmitting the coded audio and video data to a preset network preview buffer area.
In this embodiment, as another optional embodiment, the apparatus further includes:
and the local storage module (not shown in the figure) is used for storing the coded audio-video data.
In this embodiment, as another optional embodiment, the apparatus further includes:
and an analog-to-digital conversion module (not shown in the figure) configured to configure an encoding resolution attribute of a recording and playing host receiving the audio video data, where the encoding resolution attribute includes an encoding resolution and an encoding configuration mode, and the encoding configuration mode includes an adaptive mode and a fixed mode.
In this embodiment, for example, the information is used as a courseware resource (information), and the coding resolution, the image quality, the frame rate, and the code rate of a courseware channel are configured by entering (recording and broadcasting host) a channel coding parameter configuration interface through a client, a browser, or a local login device. For the encoding resolution, it may be configured as a fixed encoding resolution, and it may also be configured as an adaptive encoding resolution.
When courseware resources are displayed and played in a notebook computer, courseware video information corresponding to the courseware resources is output to a VGA/HDMI interface (a video input port) of a recording and playing host through a VGA/HDMI interface (a video output port), the recording and playing host converts the courseware video information from analog information into digital information after receiving the courseware video information, analyzes the digital courseware video information, obtains coding parameter information such as video resolution, video frame rate information and the like, outputs the coding parameter information to an encoder, codes the digital courseware video information obtained through analysis according to the configuration conditions of the coding resolution, the frame rate, the code rate and the image quality parameters, stores videos into a hard disk after coding, or sends the videos to a remote end for previewing through a network.
In this embodiment, as a further optional embodiment, the apparatus further includes:
the recording and playing system comprises a detection module (not shown in the figure) for detecting a coding resolution attribute set on an electronic device connected to a recording and playing host for receiving audio and video data, wherein the coding resolution attribute comprises a coding resolution; updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
The apparatus of this embodiment may be used to implement the technical solutions of the method embodiments shown in fig. 1 and fig. 2, and the implementation principles and technical effects are similar, which are not described herein again.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof.
In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
The embodiment of the invention also provides electronic equipment, and the electronic equipment comprises the device in any one of the embodiments.
Fig. 4 is a schematic structural diagram of an embodiment of an electronic device of the present invention, which can implement the processes of the embodiments shown in fig. 1 to 3 of the present invention, and as shown in fig. 4, the electronic device may include: the device comprises a shell 41, a processor 42, a memory 43, a circuit board 44 and a power circuit 45, wherein the circuit board 44 is arranged inside a space enclosed by the shell 41, and the processor 42 and the memory 43 are arranged on the circuit board 44; a power supply circuit 45 for supplying power to each circuit or device of the electronic apparatus; the memory 43 is used for storing executable program code; the processor 42 executes a program corresponding to the executable program code by reading the executable program code stored in the memory 43, for executing the audio-video data encoding method described in any one of the foregoing embodiments.
The specific execution process of the above steps by the processor 42 and the steps further executed by the processor 42 by running the executable program code may refer to the description of the embodiment shown in fig. 1 to 3 of the present invention, and are not described herein again.
The electronic device exists in a variety of forms, including but not limited to:
(1) a mobile communication device: such devices are characterized by mobile communications capabilities and are primarily targeted at providing voice, data communications. Such terminals include: smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, among others.
(2) Ultra mobile personal computer device: the equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such terminals include: PDA, MID, and UMPC devices, etc., such as ipads.
(3) A portable entertainment device: such devices can display and play multimedia content. This type of device comprises: audio, video players (e.g., ipods), handheld game consoles, electronic books, and smart toys and portable car navigation devices.
(4) A server: the device for providing the computing service comprises a processor, a hard disk, a memory, a system bus and the like, and the server is similar to a general computer architecture, but has higher requirements on processing capacity, stability, reliability, safety, expandability, manageability and the like because of the need of providing high-reliability service.
(5) And other electronic equipment with data interaction function.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
For convenience of description, the above devices are described separately in terms of functional division into various units/modules. Of course, the functionality of the units/modules may be implemented in one or more software and/or hardware implementations of the invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. An audio-video data encoding method, comprising:
configuring the encoding resolution attribute of a recording and broadcasting host machine for receiving the audio video data, wherein the encoding resolution attribute comprises encoding resolution and an encoding configuration mode, and the encoding configuration mode comprises an adaptive mode and a fixed mode;
analyzing the received audio and video data, and acquiring coding parameter information contained in an information header obtained by analysis, wherein the coding parameter information comprises coding resolution;
coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information; the encoding of the audio and video data subjected to analog-to-digital conversion according to the encoding parameter information includes: acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data; if the encoding configuration mode in the encoding resolution attribute is judged to be the self-adaptive mode, comparing the encoding resolution in the encoding parameter information with the encoding resolution in the configured encoding resolution attribute; if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1; obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute; and calculating the product of the coding resolution in the coding parameter information and the self-adaptive coefficient, and coding the audio and video data subjected to analog-to-digital conversion according to the product.
2. Method for encoding audio-visual data according to claim 1, characterized in that it further comprises:
and transmitting the encoded audio and video data to a preset network preview buffer area.
3. Method for encoding audio-visual data according to claim 1, characterized in that it further comprises:
and storing the coded audio and video data.
4. The method of audio-visual data encoding according to claim 1, wherein prior to said parsing of the received audio-visual data, the method further comprises:
detecting a coding resolution attribute set on electronic equipment connected to a recording and broadcasting host for receiving audio and video data, wherein the coding resolution attribute comprises a coding resolution;
updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
5. The method for encoding audio/video data according to claim 1, wherein the encoding the audio/video data subjected to analog-to-digital conversion according to the encoding parameter information includes:
acquiring fixed coding resolution in a recording and broadcasting host for receiving audio and video data;
if the encoding configuration mode in the encoding resolution attribute is judged to be a fixed mode, then
And selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
6. An audio-video data encoding device, comprising: an analog-to-digital conversion module, a coding parameter information acquisition module and a coding module, wherein,
the analog-to-digital conversion module is used for configuring the encoding resolution attribute of a recording and broadcasting host machine for receiving the audio video data, wherein the encoding resolution attribute comprises an encoding resolution and an encoding configuration mode, and the encoding configuration mode comprises an adaptive mode and a fixed mode;
the encoding parameter information acquisition module is used for analyzing the received audio and video data and acquiring encoding parameter information contained in an information header obtained by analysis, wherein the encoding parameter information comprises encoding resolution;
the coding module is used for coding the audio and video data subjected to analog-to-digital conversion according to the coding parameter information; the encoding module includes: an attribute obtaining unit, a coefficient searching unit and an encoding unit, wherein,
the attribute acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a coefficient searching unit, configured to compare an encoding resolution in the encoding parameter information with an encoding resolution in the configured encoding resolution attribute; if the coding resolution in the coding parameter information is greater than a preset first threshold of coding resolution, the adaptive coefficient is less than 1; if the coding resolution in the coding parameter information is greater than a preset coding resolution second threshold and less than or equal to a preset coding resolution first threshold, the adaptive coefficient is equal to 1; if the coding resolution in the coding parameter information is less than or equal to a preset second threshold of the coding resolution, the adaptive coefficient is greater than 1; obtaining an adaptive coefficient according to a comparison result, wherein the adaptive coefficient is contained in a pre-stored coding resolution mapping database in the coding resolution of the coding parameter information and the configured coding resolution attribute;
and the coding unit is used for calculating the product of the coding resolution in the coding parameter information and the self-adaptive coefficient and coding the audio and video data subjected to analog-to-digital conversion according to the product.
7. An apparatus for encoding audio-visual data according to claim 6, wherein the apparatus further comprises:
and the remote storage module is used for transmitting the coded audio and video data to a preset network preview buffer area.
8. An apparatus for encoding audio-visual data according to claim 6, wherein the apparatus further comprises:
and the local storage module is used for storing the coded audio and video data.
9. An apparatus for encoding audio-visual data according to claim 6, wherein the apparatus further comprises:
the recording and broadcasting system comprises a detection module, a recording and broadcasting host and a control module, wherein the detection module is used for detecting a coding resolution attribute which is set on electronic equipment connected to the recording and broadcasting host for receiving audio and video data, and the coding resolution attribute comprises a coding resolution; updating the encoding resolution in the encoding parameter information with the encoding resolution in the encoding resolution attribute set on the electronic device.
10. An apparatus for encoding audio-visual data according to claim 6, wherein the encoding module comprises: a fixed coding resolution acquisition unit, a judgment unit and an audio/video data coding unit, wherein,
the fixed coding resolution acquisition unit is used for acquiring the fixed coding resolution in the recording and broadcasting host which receives the audio and video data;
a judging unit, configured to notify the audio/video data encoding unit if the encoding configuration mode in the encoding resolution attribute is determined to be a fixed mode;
and the audio and video data coding unit is used for selecting to code the audio and video data subjected to analog-to-digital conversion according to the fixed coding resolution.
11. An electronic device, characterized in that the electronic device comprises: the device comprises a shell, a processor, a memory, a circuit board and a power circuit, wherein the circuit board is arranged in a space enclosed by the shell, and the processor and the memory are arranged on the circuit board; a power supply circuit for supplying power to each circuit or device of the electronic apparatus; the memory is used for storing executable program codes; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for executing the audio-visual data encoding method of any one of the preceding claims 1 to 5.
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