JP2009246457A - Encoding apparatus, video editing system, and control method of encoding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate a video stream in accordance with throughput of a video editing apparatus. <P>SOLUTION: The video editing apparatus 100 transmits information about the specification of the video editing apparatus 100 to an imaging apparatus 110, and the imaging apparatus 110 receives the information about the specification of the video editing apparatus 100 from the video editing apparatus 100. Then, by setting the encoding system of the video stream on the basis of the information about the specification of the video editing apparatus 100, the video stream corresponding to the throughput of the video editing apparatus is generated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an encoding device, a video editing system, a control method of the encoding device, a program, and a recording medium, and more particularly to a technique suitable for efficient encoding and video editing.

  In recent years, due to advances in processing technology for digital signals, large amounts of digital information such as moving image data, still image data, and audio data can be encoded with high efficiency and recorded on a small recording medium or transmitted via a communication medium. It is possible. Application of such a technique has developed an imaging apparatus capable of converting a television broadcast or video camera video into a stream.

  MPEG (Moving Picture Experts Group) -2 method and MPEG-4 method are known as highly efficient compression coding methods for storing and transmitting video information. Furthermore, in recent years, the MPEG-4 Part-10: AVC method has been standardized. This MPEG4 Part-10: AVC (ISO / IEC 14496-10) is a method described in H.264. It is also called the H.264 system. These compression encoding methods are compression methods using correlation in moving images, and reduce deterioration and achieve a high compression rate.

  H. In the H.264 system, each image (frame or field) included in input video information is handled as a processing unit called a picture, and this picture can be divided into one or more slices. In addition, H.C. In the H.264 system, a slice is divided into units of one or more macroblocks to perform encoding processing.

  Although it is possible to treat one picture as one slice and encode the picture without dividing the picture into slices, one picture is divided into two or more slices for the purpose of distributing the encoding process. It is often the case that encoding is performed by dividing into two. For example, when decoding encoded data using a multi-core type CPU that is the mainstream in recent years, a picture is divided into a plurality of slices, and each slice is assigned to each core, thereby efficiently performing the decoding process. Is possible.

  Further, as a technique for dividing a picture into slices, a proposal has been made to classify image blocks by determining an image pattern of an image block in a picture and to configure a plurality of slices based on the classification result. (For example, refer to Patent Document 1).

JP 2006-114979 A

  FIG. 8 is a diagram illustrating an example of slice division. In FIG. 8, 800 indicates a picture, and 801 to 804 indicate slices. In this way, generally, in slice division, a picture is divided into strips at substantially equal intervals.

  The video stream captured by the video camera and encoded and recorded with high efficiency is transferred to a video editing device composed of a computer, etc., where it can be edited by deleting unnecessary scenes or adding special effects. Applied. At this time, in a video editing system including a computer using a multi-core CPU, the video stream divided into a plurality of slices and encoded as described above can be edited more efficiently. However, in a video editing system with a single core, the editing process is easier with a single slice configuration.

  FIG. 9 is a diagram illustrating a sequence of picture types that are types of encoding schemes for each picture. Reference numeral 901 denotes an I picture that uses only the correlation within the picture, and reference numeral 902 denotes a P picture that uses the correlation with the preceding encoded picture. Reference numeral 903 denotes a B picture that uses correlation with front and rear encoded pictures.

  In the editing process in the video editing system, when a B picture using bidirectional correlation is edited, a CPU performance higher than that of the P picture is required. When an I picture that does not use correlation between pictures is edited, it can be edited with a smaller CPU performance than a B picture or a P picture. That is, in a video editing system using a CPU with a low operating frequency, the editing operation can be speeded up with a smaller number of B pictures and P pictures. However, if the number of B pictures and P pictures is small, the correlation between the pictures cannot be utilized, and the encoding efficiency is significantly reduced. It is preferable to use it.

  Since the B pictures 903 located between the I picture 901 and the P picture 902 have no dependency relationship with each other, they can be decoded in parallel. In the example shown in FIG. 9, four B pictures 903 can be decoded in parallel. If these four B pictures 903 are assigned one by one to each core of the multi-core CPU, they can be processed at high speed by parallel processing. However, such an effect cannot be obtained with a single core video editing system.

  Furthermore, in P pictures and B pictures, predictive coding by correlation is possible using a plurality of pictures as reference images. Therefore, as the number of reference images increases, more efficient encoding is possible, but the amount of memory required by the video editing system increases.

  Many video editing systems have an auxiliary storage device such as a hard disk. The video stream is temporarily stored in the auxiliary storage device, and the data is transferred to and from the main storage device such as a DRAM. I do. When the bit rate of the video stream is high, it can be encoded with high image quality with little deterioration, but the dependency on the capacity and operation speed of the auxiliary storage device and the main storage device increases. Therefore, in a video editing system having a large-capacity and high-speed main storage device and auxiliary storage device, it is desirable to edit a high-bit-rate video stream. However, when these storage devices have a small capacity or a low speed, a high bit rate video stream cannot be suitably edited.

  An object of the present invention is to generate a video stream suitable for a video editing apparatus in accordance with the processing capability of the video editing apparatus in view of the above-described problems.

  An encoding apparatus according to the present invention is an encoding apparatus that encodes a video signal and outputs a video stream obtained by the encoding to a video editing apparatus that edits the video stream, the specification of the video editing apparatus And setting means for setting the encoding method of the video signal according to the encoding method, and encoding means for encoding the video signal according to the encoding method set by the setting means and outputting the video stream. It is characterized by.

The video editing system according to the present invention includes an encoding device that encodes a video signal, transmits a video stream obtained by the encoding, and a video editing device that edits the video stream transmitted from the encoding device. In the video editing system, the video editing device includes transmission means for transmitting information about the specification of the video editing device to the encoding device, and the encoding device is a specification of the video editing device. Receiving means for receiving information about the video editing apparatus, setting means for setting the encoding method of the video signal based on information about the specifications of the video editing apparatus received by the receiving means, Encoding means for encoding the video signal in accordance with the encoding method set by the setting means, and outputting the video stream. And butterflies.
Another feature of the video editing system of the present invention is that it encodes a video signal and transmits a video stream obtained by the encoding, and a video stream transmitted from the encoding device. A video editing system comprising a video editing device that performs editing, wherein the video editing device is determined by a determining unit that determines an encoding method according to a specification of the video editing device, and the determining unit Transmitting means for transmitting information about the encoding method to the encoding device, and the encoding device receives information about the encoding method according to the specifications of the video editing device from the video editing device. The video signal encoding method is set based on information on the receiving unit and the encoding method according to the specifications of the video editing apparatus received by the receiving unit. Setting means, the encoding said video signal in accordance with the set encoding method by setting means, and having a coding means for outputting the video stream.
Another feature of the video editing system of the present invention is that an encoding device that encodes a video signal and transmits a video stream obtained by the encoding, and a video stream transmitted from the encoding device. A video editing system comprising a video editing device for editing, wherein the video editing device includes specification information receiving means for receiving information about the specifications of the encoding device from the encoding device, and the video editing Determining means for determining an encoding scheme according to the specifications of the apparatus and the specifications of the encoding apparatus; and transmitting means for transmitting information about the encoding scheme determined by the determining means to the encoding apparatus. The encoding device includes: specification information transmitting means for transmitting information about the specification of the encoding device to the video editing device; specifications of the video editing device; Receiving means for receiving from the video editing apparatus information about the encoding method according to the specifications of the encoding device, and based on the information about the encoding method received by the receiving means, It comprises setting means for setting an encoding method, and encoding means for encoding the video signal in accordance with the encoding method set by the setting means and outputting the video stream.

  The encoding apparatus control method of the present invention is an encoding apparatus control method for encoding a video signal and outputting a video stream obtained by the encoding to a video editing apparatus that edits the video stream, A setting step for setting the encoding method of the video signal according to the specifications of the video editing device, and an encoding for encoding the video signal according to the encoding method set in the setting step and outputting the video stream And a process.

  The program according to the present invention is a program that causes a computer to execute a video in an encoding device that encodes a video signal and outputs a video stream obtained by the encoding to a video editing device that edits the video stream. A setting step for setting the encoding method of the video signal according to the specifications of the editing device; an encoding step for encoding the video signal according to the encoding method set in the setting step and outputting the video stream; Is executed by a computer.

  The recording medium of the present invention is characterized by recording the program described above.

  According to the present invention, since the encoding method is changed according to the specification of the video editing apparatus, a video stream suitable for the video editing apparatus can be generated. In addition, since the encoding method can be changed within the allowable range of the editing processing capability, it is possible to maintain suitable encoding performance without lowering the encoding efficiency more than necessary.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration example of a video editing system according to the present embodiment.
In FIG. 1, the video editing apparatus 100 includes a main storage unit 101, an auxiliary storage unit 102, a processor unit 103, and an interface unit 104. In addition, the imaging apparatus 110 includes an imaging unit 111, an encoding unit 112, a medium unit 113, an interface unit 114, and a control unit 115.

  The video editing apparatus 100 may be a general-purpose computer such as a personal computer or a workstation, or may be a dedicated apparatus. The processor unit 103 is composed of one or more CPU cores, performs predetermined editing processing on the video stream transferred from the imaging device 110, and stores it in the main storage unit 101. The processor unit 103 controls the entire video editing apparatus 100.

  The main storage unit 101 includes a DRAM or the like, and stores data obtained by deleting unnecessary scenes or adding special effects from the video stream transferred from the imaging device 110. The auxiliary storage unit 102 is, for example, a hard disk, and temporarily stores the video stream transferred from the imaging device 110.

  The imaging device 110 is a video camera or a still camera. The imaging unit 111 captures a subject image and performs predetermined image processing such as white balance and γ correction on the video signal. The encoding unit 112 encodes the video signal input from the imaging unit 111 using a set encoding method, and outputs encoded data (video stream).

  The medium unit 113 is equipped with a recording medium for recording the video stream encoded by the encoding unit 112, and records and reproduces the video stream recorded on the recording medium. The control unit 115 is for controlling the entire imaging apparatus 110, sets the encoding method in the encoding unit 112, and determines the encoding method based on information sent from the video editing device 100. To do.

  The operation of the video editing system in this embodiment will be described with reference to the flowchart of FIG. FIG. 2 is a flowchart showing an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S <b> 201, communication connection is established between the video editing device 100 and the imaging device 110. In FIG. 1, the solid line indicates that the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110 are connected. In this case, a wired connection such as USB or IEEE1394 may be used, or a wireless connection such as Bluetooth may be used. By the processing in step S201, the video editing apparatus 100 and the imaging apparatus 110 can perform data communication.

  Next, in step S <b> 202, the video editing apparatus 100 transmits information about the specifications of each unit of the video editing apparatus 100 to the imaging apparatus 110 through the interface unit 104 that functions as a transmission unit. The imaging apparatus 110 receives this information through the interface unit 114 that functions as a receiving unit. Specifically, information such as the number of cores of the processor unit 103 in the video editing apparatus 100, the operating frequency, the capacity of the main storage unit 101 and the auxiliary storage unit 102, and the read / write speed is obtained from the video editing apparatus 100 as an imaging device. 110.

  Next, in step S203, the imaging apparatus 110 side refers to the information about the specifications of each part of the video editing apparatus 100 received in step S202, and the code of the encoding unit 112 in the imaging apparatus 110 according to the specifications of each part. Determine the conversion method. Specifically, for example, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and auxiliary storage unit 102.

  Next, in step S204, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined in step S203 to the encoding unit 112, and ends the process.

  As described above, according to the present embodiment, the video signal encoding method according to the specifications of the video editing apparatus 100 is set. Thereby, the imaging apparatus 110 can transmit a video stream suitable for handling by the video editing apparatus 100, and the video editing apparatus 100 can preferably edit the video stream.

(Second Embodiment)
The video editing system in the present embodiment will be described with reference to the flowchart of FIG. Note that the configuration of the video editing system of this embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 3 is a flowchart showing an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S301, communication connection is established between the video editing apparatus 100 and the imaging apparatus 110. In FIG. 1, the solid line indicates that the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110 are connected. In this case, a wired connection such as USB or IEEE1394 may be used, or a wireless connection such as Bluetooth may be used. By the processing in step S301, data communication is possible between the video editing apparatus 100 and the imaging apparatus 110.

  Next, in step S302, the processor unit 103 of the video editing apparatus 100 functions as a determining unit, and the video editing apparatus 100 determines the encoding method of the encoding unit 112 in the imaging apparatus 110 according to the specifications of each unit. Specifically, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor unit 103, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and the auxiliary storage unit 102. To do.

  Next, in step S303, the video editing apparatus 100 transmits information about the determined encoding method to the imaging apparatus 110 through the interface unit 104 functioning as a transmission unit. The imaging apparatus 110 receives this information through the interface unit 114 that functions as a receiving unit. Next, in step S304, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined on the video editing apparatus 100 side to the encoding unit 112, and ends the process.

  As described above, according to the present embodiment, the video signal encoding method is set in accordance with the specifications of the video editing apparatus 100. Thereby, the imaging apparatus 110 can transmit a video stream suitable for handling by the video editing apparatus 100, and the video editing apparatus 100 can preferably edit the video stream.

(Third embodiment)
The video editing system in the present embodiment will be described with reference to the flowchart of FIG. Note that the configuration of the video editing system of this embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 4 is a flowchart illustrating an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S401, a communication connection is established between the video editing apparatus 100 and the imaging apparatus 110. In FIG. 1, the solid line indicates that the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110 are connected. In this case, a wired connection such as USB or IEEE1394 may be used, or a wireless connection such as Bluetooth may be used. By the processing in step S401, the video editing apparatus 100 and the imaging apparatus 110 can perform data communication.

  Next, in step S <b> 402, the imaging apparatus 110 transfers information about the specifications of each unit of the imaging apparatus 110 to the video editing apparatus 100 through the interface unit 114 that functions as a specification information transmission unit. The video editing apparatus 100 receives this information by the interface unit 104 functioning as specification information receiving means. Specifically, MPEG-2 and H.264 are used. Information such as an encoding method such as H.264, an encoding resolution, and an encoding bit rate application range is transmitted to the video editing apparatus 100.

  Next, in step S <b> 403, the processor unit 103 of the video editing apparatus 100 functions as a determination unit, and the encoding method of the encoding unit 112 in the imaging apparatus 110 according to the specifications of each unit of the imaging apparatus 110 and the video editing apparatus 100. To decide. Specifically, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor unit 103, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and the auxiliary storage unit 102. To do.

  Next, in step S404, the video editing apparatus 100 transmits the determined encoding method to the imaging apparatus 110 via the interface unit 104 functioning as a transmission unit. The imaging apparatus 110 receives this information through the interface unit 114 that functions as a receiving unit. Next, in step S405, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined on the video editing apparatus 100 side to the encoding unit 112, and ends the process.

  As described above, according to the present embodiment, the video signal encoding method is set according to the specifications of the video editing apparatus 100 and the specifications of the imaging apparatus 110. As a result, the imaging apparatus 110 can prevent the encoding efficiency from being lowered more than necessary, and can transmit a video stream suitable for the video editing apparatus 100 to handle. You can edit the stream.

(Fourth embodiment)
The video editing system in this embodiment will be described with reference to the flowchart of FIG. Note that the configuration of the video editing system of this embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 5 is a flowchart showing an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S <b> 501, it is determined whether a removable recording medium is connected to the video editing apparatus 100. This removable recording medium is an exchange medium such as a memory card and can be attached to the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110. Further, it may also be used as a recording medium mounted on the medium unit 113 that records video data captured by the imaging unit 111. As a result of this determination, if a detachable recording medium is not connected, the process stands by, and if a detachable recording medium is connected, the process proceeds to the next step S502.

  Next, in step S502, the processor unit 103 of the video editing apparatus 100 functions as a recording unit, and writes information about the specifications of each unit of the video editing apparatus 100 to a removable recording medium. Specifically, information such as the number of cores of the processor unit 103 in the video editing apparatus 100, the operating frequency, the capacity of the main storage unit 101 and the auxiliary storage unit 102, and the read / write speed is recorded on a removable recording medium. .

  Next, in step S <b> 503, the imaging apparatus 110 determines whether a removable recording medium is removed from the video editing apparatus 100 and connected to the imaging apparatus 110. If the result of this determination is that a detachable recording medium is not connected, the process stands by, and if a detachable recording medium is connected, the process proceeds to the next step S504.

  Next, in step S504, the control unit 115 of the imaging device 110 functions as a reading unit, and reads information about specifications of each unit of the video editing device 100 from a removable recording medium. In step S <b> 505, the control unit 115 of the imaging device 110 determines the encoding method of the encoding unit 112 in the imaging device 110 according to the specifications of each unit of the video editing device 100. Specifically, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor unit 103, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and the auxiliary storage unit 102. To do.

  Next, in step S506, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined in step S505 in the encoding unit 112, and ends the process.

  As described above, according to the present embodiment, the video signal encoding method is set in accordance with the specifications of the video editing apparatus 100. Thereby, the imaging apparatus 110 can transmit a video stream suitable for handling by the video editing apparatus 100, and the video editing apparatus 100 can preferably edit the video stream.

(Fifth embodiment)
The video editing system in the present embodiment will be described with reference to the flowchart of FIG. Note that the configuration of the video editing system of this embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 6 is a flowchart illustrating an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S <b> 601, it is determined whether a removable recording medium is connected to the video editing apparatus 100. This removable recording medium is an exchange medium such as a memory card and can be attached to the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110. Further, it may also be used as a recording medium mounted on the medium unit 113 that records video data captured by the imaging unit 111. As a result of this determination, if a detachable recording medium is not connected, the process stands by, and if a detachable recording medium is connected, the process proceeds to the next step S602.

  Next, in step S <b> 602, the processor unit 103 of the video editing apparatus 100 functions as a determination unit, and determines the encoding method of the encoding unit 112 in the imaging apparatus 110 according to the specifications of each unit of the video editing apparatus 100. Specifically, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor unit 103, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and the auxiliary storage unit 102. To do.

  Next, in step S603, the processor unit 103 of the video editing apparatus 100 functions as a recording unit, and writes information about the determined encoding method to a removable recording medium. In step S <b> 604, the imaging apparatus 110 determines whether a removable recording medium is removed from the video editing apparatus 100 and connected to the imaging apparatus 110. As a result of this determination, if a detachable recording medium is not connected, the process waits as it is, and if a detachable recording medium is connected, the process proceeds to the next step S605.

  Next, in step S605, the control unit 115 of the imaging apparatus 110 functions as a reading unit, and reads information on the encoding method determined on the video editing apparatus 100 side from a removable recording medium. In step S606, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined on the video editing apparatus 100 side to the encoding unit 112, and ends the process.

  As described above, according to the present embodiment, the video signal encoding method is set in accordance with the specifications of the video editing apparatus 100. Thereby, the imaging apparatus 110 can transmit a video stream suitable for handling by the video editing apparatus 100, and the video editing apparatus 100 can preferably edit the video stream.

(Sixth embodiment)
The video editing system in this embodiment will be described with reference to the flowchart of FIG. Note that the configuration of the video editing system of this embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 7 is a flowchart illustrating an example of a processing procedure for setting an encoding method in the video editing system of the present embodiment.

  First, in step S <b> 701, it is determined whether a removable recording medium is connected to the imaging device 110. This removable recording medium is an exchange medium such as a memory card and can be attached to the interface unit 104 of the video editing apparatus 100 and the interface unit 114 of the imaging apparatus 110. Further, it may also be used as a recording medium mounted on the medium unit 113 that records video data captured by the imaging unit 111. As a result of this determination, if a detachable recording medium is not connected, the process waits as it is, and if a detachable recording medium is connected, the process proceeds to the next step S702.

  In step S <b> 702, the control unit 115 of the imaging apparatus 110 functions as a specification information recording unit, and writes information about the specifications of each unit of the imaging apparatus 110 on a removable recording medium. Specifically, MPEG-2 and H.264 are used. Information such as an encoding method such as H.264, an encoding resolution, and an encoding bit rate application range is recorded.

  Next, in step S <b> 703, it is determined whether a removable recording medium is removed from the imaging device 110 and connected to the video editing device 100. As a result of this determination, if a detachable recording medium is not connected, the process stands by, and if a detachable recording medium is connected, the process proceeds to the next step S704. In step S <b> 704, the processor unit 103 of the video editing apparatus 100 functions as a specification information reading unit, and reads information about specifications of each unit of the imaging apparatus 110 from a removable recording medium.

  Next, in step S <b> 705, the processor unit 103 of the video editing apparatus 100 functions as a determination unit, and performs encoding in the imaging apparatus 110 according to the specifications of each part of the video editing apparatus 100 and the specifications of each part of the imaging apparatus 110. The encoding method of the unit 112 is determined. Specifically, the number of slice divisions is determined according to the number of cores of the processor unit 103, or the number of B pictures located between the I picture and the P picture is determined. Also, the composition ratio of the picture type is determined according to the operating frequency of the processor unit 103, or the encoding bit rate is determined according to the capacity and operating speed of the main storage unit 101 and the auxiliary storage unit 102. To do.

  Next, in step S706, the processor unit 103 of the video editing apparatus 100 functions as a recording unit, and writes information about the determined encoding method to a removable recording medium. In step S707, it is determined whether the removable recording medium is detached from the video editing apparatus 100 and connected to the imaging apparatus 110. If the result of this determination is that a detachable recording medium is not connected, the process stands by, and if a detachable recording medium is connected, the process proceeds to the next step S708.

  Next, in step S708, the control unit 115 of the imaging apparatus 110 functions as a reading unit, and reads information about the encoding method determined on the video editing apparatus 100 side from a removable recording medium. In step S709, the control unit 115 of the imaging apparatus 110 functions as a setting unit, sets the encoding method determined on the video editing apparatus 100 side to the encoding unit 112, and performs processing.

  As described above, according to the present embodiment, the video signal encoding method is set according to the specifications of the video editing apparatus 100 and the specifications of the imaging apparatus 110. As a result, the imaging apparatus 110 can prevent the encoding efficiency from being lowered more than necessary, and can transmit a video stream suitable for the video editing apparatus 100 to handle. You can edit the stream.

(Other embodiments according to the present invention)
Each means of the encoding device and the video editing device and the steps of the control method of the encoding device in the embodiment of the present invention described above are realized by the operation of a program stored in a RAM or ROM of a computer. it can. This program and a computer-readable recording medium recording the program are included in the present invention.

  In addition, the present invention can be implemented as, for example, a system, apparatus, method, program, or recording medium. Specifically, the present invention may be applied to a system including a plurality of devices. The present invention may be applied to an apparatus composed of a single device.

  In the present invention, a software program (in the embodiment, a program corresponding to the flowcharts shown in FIGS. 2 to 7) that realizes the functions of the above-described embodiments may be directly or remotely supplied to the system or apparatus. Including. This includes the case where the system or the computer of the apparatus is also achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, or the like.

  Examples of the recording medium for supplying the program include a flexible disk, a hard disk, an optical disk, and a magneto-optical disk. Further, there are MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R) and the like.

  As another program supply method, there is a method of connecting to a homepage on the Internet using a browser of a client computer. The computer program itself of the present invention or a compressed file including an automatic installation function can be downloaded from the homepage by downloading it to a recording medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the present invention.

  As another method, the program of the present invention is encrypted, stored in a recording medium such as a CD-ROM, distributed to users, and encrypted from a homepage via the Internet to users who have cleared predetermined conditions. Download the key information to be solved. It is also possible to execute the encrypted program by using the key information and install the program on a computer.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, the program read from the recording medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

It is a block diagram which shows the structural example of the video editing system in the 1st Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 1st Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 2nd Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 3rd Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 4th Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 5th Embodiment of this invention. It is a flowchart which shows an example of the process sequence which sets the encoding system in the video editing system of the 6th Embodiment of this invention. It is a figure which shows the structure of the slice in a picture. It is a figure which shows the structure of a picture type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Video editing apparatus 101 Main storage part 102 Auxiliary storage part 103 Processor part 104 Interface part 110 Imaging device 111 Imaging part 112 Encoding part 113 Media part 114 Interface part 115 Control part

Claims (13)

An encoding device that encodes a video signal and outputs a video stream obtained by the encoding to a video editing device that edits the video stream,
Setting means for setting the encoding method of the video signal according to the specifications of the video editing device;
An encoding apparatus comprising: encoding means for encoding the video signal according to the encoding method set by the setting means and outputting the video stream. Receiving means for receiving information about the specifications of the video editing device from the video editing device;
2. The encoding apparatus according to claim 1, wherein the setting means sets the encoding method of the video signal based on information about the specification of the video editing apparatus received by the receiving means. Receiving means for receiving from the video editing apparatus information about an encoding method according to the specifications of the video editing apparatus;
The said setting means sets the encoding system of the said video signal based on the information about the encoding system according to the specification of the said video editing apparatus received by the said receiving means. The encoding device described in 1. Specification information transmitting means for transmitting information about the specifications of the encoding device to the video editing device;
Receiving means for receiving from the video editing apparatus information about an encoding method according to the specifications of the video editing apparatus and the specifications of the encoding apparatus;
The encoding apparatus according to claim 1, wherein the setting unit sets the encoding method of the video signal based on information on the encoding method received by the receiving unit. A reading means for reading information about the specifications of the video editing apparatus from a recording medium on which information about the specifications of the video editing apparatus is recorded;
The encoding device according to claim 1, wherein the setting unit sets the encoding method of the video signal based on information about the specification of the video editing device read by the reading unit. . A reading means for reading out information about the encoding method according to the specifications of the video editing apparatus from a recording medium on which information about the encoding method according to the specifications of the video editing apparatus is recorded;
The said setting means sets the encoding system of the said video signal based on the information about the encoding system according to the specification of the said video editing apparatus read by the said reading means. The encoding device according to 1. A reading means for reading out information about the encoding method from a recording medium on which information about the encoding method according to the specifications of the video editing device and the specification of the encoding device is recorded;
The encoding apparatus according to claim 1, wherein the setting unit sets the encoding method of the video signal based on information about the encoding method read by the reading unit. A video editing system including an encoding device that encodes a video signal and transmits a video stream obtained by the encoding, and a video editing device that edits the video stream transmitted from the encoding device. ,
The video editing device
Transmission means for transmitting information about the specifications of the video editing apparatus to the encoding apparatus;
The encoding device includes:
Receiving means for receiving information about the specifications of the video editing device from the video editing device;
Setting means for setting an encoding method of the video signal based on information about the specification of the video editing apparatus received by the receiving means;
A video editing system comprising: encoding means for encoding the video signal according to the encoding method set by the setting means and outputting the video stream. A video editing system including an encoding device that encodes a video signal and transmits a video stream obtained by the encoding, and a video editing device that edits the video stream transmitted from the encoding device. ,
The video editing device
Determining means for determining an encoding method according to the specifications of the video editing device;
Transmission means for transmitting information about the encoding scheme determined by the determination means to the encoding device;
The encoding device includes:
Receiving means for receiving, from the video editing apparatus, information about an encoding method according to the specifications of the video editing apparatus;
Setting means for setting the encoding method of the video signal based on the information about the encoding method according to the specification of the video editing apparatus received by the receiving unit;
A video editing system comprising: encoding means for encoding the video signal according to the encoding method set by the setting means and outputting the video stream. A video editing system including an encoding device that encodes a video signal and transmits a video stream obtained by the encoding, and a video editing device that edits the video stream transmitted from the encoding device. ,
The video editing device
Specification information receiving means for receiving information about the specifications of the encoding device from the encoding device;
Determining means for determining an encoding method according to the specifications of the video editing device and the specifications of the encoding device;
Transmission means for transmitting information about the encoding scheme determined by the determination means to the encoding device;
The encoding device includes:
Specification information transmitting means for transmitting information about the specifications of the encoding device to the video editing device;
Receiving means for receiving, from the video editing apparatus, information about an encoding method according to the specifications of the video editing apparatus and the specifications of the encoding apparatus;
Setting means for setting the encoding method of the video signal based on information about the encoding method received by the receiving means;
A video editing system comprising: encoding means for encoding the video signal according to the encoding method set by the setting means and outputting the video stream. An encoding device control method for encoding a video signal and outputting a video stream obtained by the encoding to a video editing device for editing the video stream,
A setting step for setting the encoding method of the video signal according to the specifications of the video editing device;
And a coding step of coding the video signal according to the coding method set in the setting step and outputting the video stream. A program for causing a computer to execute an encoding device that encodes a video signal and outputs a video stream obtained by the encoding to a video editing device that edits the video stream,
A setting step for setting the encoding method of the video signal according to the specifications of the video editing device;
A program for causing a computer to execute an encoding step of encoding the video signal according to the encoding method set in the setting step and outputting the video stream.   A computer-readable recording medium on which the program according to claim 12 is recorded.

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