JPH11298859A - Video signal encoding system and video signal encoding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To designate a video that is desired to be encoded and to accurately encode the part with a desired image quality by counting a frame number from a synchronizing signal included in a signal outputted by a video signal reproducing device and deciding the encoding stop of an encoding circuit when it matches the set frame number. SOLUTION: A 2nd controller 55 receives a transmitted encoding start instruction and notifies the effect to a 1st controller 54, at the same time, a synchronizing signal counter that counts a synchronizing signal which is separated by a synchronizing signal separating circuit 53 in a 1st encoding device from a video signal inputted from a video signal reproducing device 50 is started, it is set to a register in an encoding circuit 52 and various parameters that are transmitted are set. The controller 55 confirms that the counter number of the synchronizing signal counter coincides with an encoding frame number calculated by the controller 54 after the encoding is started. Then, when it coincides, the controller 55 transmits an encoding stop instruction to the controller 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a system for encoding and storing video signals.

[0002]

2. Description of the Related Art As a conventional example of a system for encoding and storing video signals, there is a system disclosed in Japanese Patent Application Laid-Open No. 8-307809, for example.

FIG. 13 is a block diagram of a conventional video signal encoding system disclosed in Japanese Patent Application Laid-Open No. 8-307809. 1 is an example of a video signal search system applied to data creation by MPEG. Note that in data creation by MPEG, a group of several to a dozen or more groups of consecutive frames or fields constituting a video is defined as a unit (GOP).
, And the group also becomes a management unit of access such as search.

[0006] Of the plurality of video data 1, first, the video data A is subjected to deletion of extra frames or padding of dummy frames by the coded data control unit 2 so that the number of frames and the unit of the coding process become the same. The video data whose frame has been adjusted by the code data control unit 2 is separated into a video signal and an audio signal, input to the video coding unit 3 and the audio coding unit 4, and coded. The outputs of the encoding units 3 and 4 are input to the multiplexing unit 5 and become multiplexed code data, which is stored in the temporary storage unit 6. Subsequently, the next video data video B is similarly encoded and stored in the temporary storage unit 6. After all video is encoded and stored, search and
The video control information adding unit 7 creates information necessary for searching for each video, such as an address where video data is recorded in the code data, and video control information such as fade-in, fade-out, and repetitive reproduction. After adding information to the code data, a series of code data 8 is created. The code data control unit 2, the video encoding unit 3, the audio encoding unit 4, and the multiplexing unit 5 constitute an encoding unit, and the search / playback control information adding unit 7 constitutes a search / playback control information adding unit. Is what you are doing.

FIG. 14 shows the contents of processing performed by the code data control unit in FIG. FIG.
In (a), the last delimiter of the video data does not match the encoding processing unit. Here, the coding processing unit is four frames. Therefore, in the code data control unit 3,
By deleting the last frame, the encoding processing unit is aligned with the video segment. On the other hand, in FIG. 14B, similarly, the encoding processing unit and the video delimiter are aligned by adding a dummy frame for padding the last delimiter of the video.

FIG. 15 shows an example of code data created by the system shown in FIG. In this figure, three video data of video A, video B, and video C are included in a series of code data. Reference numerals 9, 10, and 11 denote search information whose contents differ depending on the position in the code data as described later. As an example of the search information, the video name, the code length of the video, and the relative position from the search information to the beginning of each video are shown with signs. For example, video C
Is a code length of www (byte), and vvv (byte) backward from an appropriate position of the search information 10 to the beginning of the video C
It is shown that Therefore, when the presentation request of the image C is issued while accessing the middle of the image A, the next search information 10 is immediately accessed, and the position from the search information to the image C is vvv (byte) ahead. Therefore, it is possible to access the image C at high speed and continuously.

[0007] The search information need not necessarily be inserted between each video, but can be present at any place in the code data as shown in FIG. However, in this case, the insertion of the search information must not affect the decoding of the video data due to a delay or the like.

[0008]

In the above-mentioned conventional video signal coding system, a rough configuration and a coding control unit for coding a plurality of videos as a series of code data by combining the coding processing units of the plurality of videos. Although the processing and the data structure at that time are shown, how to specify the video to be encoded from the video signals reproduced from the video signal reproducing apparatus, how to specify the video signal reproducing apparatus and the encoding apparatus There is no description as to how to control and encode exactly the specified portions with the desired image quality, or how to interactively encode multiple videos.

According to the present invention, a video to be coded is designated from a video signal reproduced from a video signal reproducing apparatus, the portion is precisely coded with a desired image quality, and a plurality of videos are interactively coded. It is an object to obtain an encoding system and an encoding method for performing the encoding.

Further, according to the present invention, a video to be encoded is specified from video signals reproduced from a video signal reproducing apparatus,
It is possible to encode one image at a partially different bit rate by accurately encoding the portion with a desired image quality, and connecting the encoded individual encoded data to one encoded data. An object is to obtain an encoding system and an encoding method.

[0011]

A video signal encoding system according to the present invention comprises a video signal reproducing device, an encoding circuit for encoding an output signal of the video signal reproducing device, and a reproduction of the video signal reproducing device. Alternatively, control means for controlling a stop operation, setting means for setting the number of times of coding in the coding circuit, a coding parameter or a time until the start of coding, a signal coded in the past and a signal coded this time Determining means for determining whether or not the signal is recorded on the same medium in the video signal reproducing apparatus, and determining whether or not the signal output from the video signal reproducing apparatus is a set frame; Coding start determining means for determining coding start of the coding circuit; and counting the number of frames from a synchronization signal included in a signal output from the video signal reproducing device. Those having a coding stop determining means for determining a coding stop of the coding circuit when match the number set frame.

[0012] A video signal encoding system according to the present invention comprises:
In the above-mentioned video signal encoding system, the video signal encoding system further comprises means for performing stream conversion on a plurality of pieces of encoded data based on the number of times of encoding set by the setting means and joining them to one piece of encoded data.

In the video signal encoding method according to the present invention, a name of a medium on which a signal to be encoded is recorded, an encoding start time, an encoding end time, an encoding bit rate, and a storage file name are defined as an encoding unit (clip). Setting the number of encodings to be performed, obtaining the number of encoded frames based on the encoding start time and the encoding end time, selecting the medium on which the signal to be encoded is recorded, the medium selected based on the encoding start time Setting the playback start position of the
Starting a reproduction operation of the medium based on the reproduction start signal, generating an encoding start signal based on time information of the reproduced signal, an encoding start time, and a set offset frame number, based on the encoding start signal Starting a count of a synchronization signal included in the reproduced signal, detecting that the count of the synchronization signal matches the number of encoded frames, and generating an encoding stop signal and a reproduction stop signal. The above steps are repeated until the number of times reaches a predetermined value.

The video signal encoding method according to the present invention, in the video signal encoding method described above, includes a step of performing stream conversion on the encoded data of each encoded clip and joining them to one encoded data. It is.

[0015]

According to the video signal encoding system of the present invention, a video to be encoded is specified from among the video signals reproduced from the video signal reproducing apparatus, and that portion is accurately designated to a desired image quality. , And a system for interactively encoding a plurality of videos can be obtained.

According to the video signal encoding system of the present invention, a video to be encoded is designated from among the video signals reproduced from the video signal reproducing apparatus, and that portion is accurately encoded with a desired image quality. Further, by joining the encoded individual encoded data into one encoded data,
A system can be obtained for encoding one video at partially different bit rates.

According to the video signal encoding method of the present invention, a video to be encoded is specified from the video signals to be reproduced, the portion is accurately encoded with a desired image quality, and a plurality of videos are encoded. A simple coding method for interactive coding can be obtained.

According to the video signal encoding method of the present invention, a video to be encoded is specified from the reproduced video signal, the portion is accurately encoded with a desired image quality, and the encoded individual By joining the coded data of (1) and (2) into one coded data, it is possible to obtain a simple coding method for coding one video at a partially different bit rate.

Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment. Embodiment 1 FIG. FIG. 1 is a block diagram illustrating a video signal encoding system according to Embodiment 1 of the present invention. Reference numeral 50 denotes a video signal reproducing device such as a VTR serving as a video signal source of a video signal encoding system, and 51 denotes first encoding for encoding a video signal input from the video signal reproducing device 50 by a method such as MPEG. An encoding device 52 is provided inside the first encoding device 51 and performs an actual encoding such as MPEG in a circuit to generate a stream to be output to a storage medium such as an HDD. A synchronization signal separating circuit for separating a synchronization signal from a video signal input from the video signal reproducing device 50, a discrimination of a medium on which the video signal is recorded, setting of the number of times of encoding,
The setting of various parameters for encoding such as bit rate, and the stream encoded by the encoding
PC that gives a control signal to the first encoding device 51 by specifying a file name when storing the data in a storage medium such as
A first controller 55 such as a (personal computer) is a second controller which is inside the first encoding device 51 and receives a control signal from the first controller 54 and controls the encoding circuit 52. Note that the encoding device 51 includes an encoding circuit 52, a synchronization signal separation circuit 53, and a second controller 55.

FIG. 2 is a diagram for explaining a control method of the video signal encoding system according to the first embodiment of the present invention, using a main operation screen of the first controller 54. Note that the operation screen includes a start button for starting video signal encoding, an encoding status display field indicating a status such as encoding start or encoding stop of the first encoding device 51, and a video signal playback device 50 The VTR status display field indicating the status such as reproduction start or reproduction stop and the like, and the encoding actually starts after the first encoding device 51 receives the control signal indicating the encoding start from the first controller 54. It is composed of an offset frame number setting column for absorbing a delay of a time required before.

FIG. 3 is a diagram for explaining a control method of the video signal encoding system according to the first embodiment of the present invention using a sub operation screen of the first controller 54. The operation screen includes an encoding number setting field for setting the number of encodings, a tape name setting field for setting an ID of a medium to be reproduced in the video signal reproducing device 50, for example, a tape, and an encoding start time of the VTR. A start time setting field set by a time code, an end time setting field setting an encoding end time by a VTR time code, a bit rate setting field setting an encoding image quality, and a stream to be encoded stored in an HDD or the like. A storage file name setting field is used to set a file name when the file is stored in the storage medium.

FIG. 4 is a view for explaining a control method of the video signal encoding system according to the first embodiment of the present invention using a flowchart.

FIG. 5 is a diagram for explaining the operation of the first encoding device 51 of the video signal encoding system according to the first embodiment of the present invention using a flowchart.

Next, FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG.
The operation of the video signal encoding system according to the first embodiment of the present invention will be described in detail with reference to FIG. 4. Referring to the flowchart of FIG. 4, at 60, the number of encodings, the tape name, the encoding start time, the encoding end time, the bit rate, and the like are displayed on the sub operation screen of the first controller 54 in FIG.
And save file name. Hereinafter, a set of various settings for each encoding count in FIG. 3 is referred to as one clip. The number of times of encoding is n, and the number of times of encoding of the last clip is N. At 61, the number of encodings is set to an initial value n = 0, and at 62, the number of encodings is incremented to 1 and set to a clip having the number of encodings of 1, which is the first clip. At this point, at 63, the encoding status display field on the main operation screen of the first controller 54 in FIG. 2 indicates that encoding is stopped. Next, at 64, the first controller 54 sets the tape name, the encoding start time, the encoding end time, the bit rate, and the storage file name of the clip having the encoding number 1 set at 60. Although not shown on the setting screen, a description thereof will be omitted, but as other setting parameters, various parameters of encoding in accordance with the MPEG standard, such as a type of a stream to be stored, are also set. Then 6
In 5, the first controller 54 determines the number of encoded frames from the encoding start time and the encoding end time set in 64. Next, at 66, the first controller 54 inquires of the second controller 55 whether or not the first encoding device 51 can start encoding. If the encoding can be started, at 67, the first controller 54 transmits to the second controller 55 the encoding frame number obtained in 65 and various encoding parameters such as the bit rate set in 64. Then 68
In, the first controller rewinds the video signal reproducing device 50 to a position before the encoding start time. At 68, the first controller 54 sends a playback start signal to the video signal playback device 50, and the video signal playback device 50 starts playback. Next, at 69, the time code of the video signal reproducing apparatus 50 being reproduced is acquired, and at 71, the acquired time code is obtained from the encoding start time as shown in FIG.
In step 72, the first controller 54 transmits an encoding start command to the second controller 55 when the number of offset frames is equal to or greater than the value obtained by subtracting the number of offset frames set in step 2. In the encoding performed by the first encoding device 51, the time required from when the second controller 55 receives the encoding start command transmitted by the first controller 54 until the actual encoding starts. Is not constant. This is because when the second controller 55 sets various coding parameters such as a bit rate in a register in the coding circuit 52, there is a time difference required for the setting depending on the type of setting. Accordingly, it is necessary to set an offset frame in the offset frame setting column of FIG. 2 and to perform the processing from when the first encoding device 51 receives the encoding start command from the first controller 54 to when the encoding is actually started. It is configured to absorb a long time delay. 7
In 3, the first controller 54 receives the notification of the reception of the encoding start command from the second controller 55, and displays “Start encoding” in the status display column on the main operation screen of the first controller 54 in FIG. 2.

On the other hand, the operation of the first encoding device 51 from the start of encoding to the end of encoding will be described with reference to FIG. At 80 in FIG. 5, various parameters of encoding such as the number of encoded frames and the bit rate transmitted at 67 in FIG. 4 are received by the second controller 55, and the reception is notified to the first controller 54. I do. Next, at 81 in FIG. 5, the encoding start command transmitted at 72 in FIG. 4 is received by the second controller 55, and the reception is notified to the first controller 54, and at the same time, at 82 in FIG. In the synchronization signal separation circuit 53 in the first encoding device 51, a synchronization signal counter for counting the synchronization signal separated from the video signal input from the video signal reproduction device 50 is started. Various parameters set in 64 and transmitted in 67 are set in the register.
After the start of encoding, as shown at 83 in FIG. 5, in the second controller 55, the counter number of the synchronization signal counter matches the number of encoded frames obtained by the first controller 54 at 65 in FIG. It is checked whether they match or not, and if they match, as shown at 84 in FIG.
The encoding stop command is transmitted to the first controller 54. At this time, the second controller 55 also stops the encoding operation of the encoding circuit 52.

On the other hand, on the first controller 54 side, at 72 in FIG. 4, after transmitting the encoding start command, 7 in FIG.
As shown in FIG. 4, until the encoding stop command is received from the second controller 55, the encoding start is continuously displayed in the status display column at 73 in FIG. In the first encoding device 51, when encoding up to the number of encoded frames set by the first controller 54 is completed and an encoding stop command transmitted from the second controller 55 is received, 75 in FIG. In FIG. 4, the first controller 54 displays “encoding stopped” in the encoding status display field, and further stops the video signal reproducing device 50 at 76 in FIG. 4 to perform a series of encoding operations for one clip. finish.
Further, if the number of encodings n is smaller than the number of encodings N of the last clip at 77 in FIG. 4, the process returns to 62 in FIG. 4, and the number of encodings n is incremented by one, and
This is set to the clip of the next encoding number 2 set at 0. At this point, at 63, the encoding status display field on the main operation screen of the first controller 54 in FIG. 2 indicates that encoding is stopped. Next, at 64, the first controller 54 sets the tape name, the encoding start time, the encoding end time, the bit rate, and the storage file name of the clip of the encoding number 2 set at 60. At this time, if the setting of the tape name of the previously encoded clip is different from the setting of the tape name of the clip to be encoded this time, the tape in the video signal reproducing device 50 is ejected, and the user changes the tape. Wait for. Below, 6
The operations from 5 to 76 are performed in the same manner as when the number of times of encoding is 1, and a series of encoding operations for one clip ends. Further, if the number of encodings n is smaller than the number of encodings N of the last clip at 77 in FIG. 4, the process returns to 62 of FIG. 4. If the number of encodings n is the number of encodings N of the last clip,
The encoding operation of all clips set in 60 is ended.

In the video signal encoding system configured as described above, a medium to be reproduced from the video signal reproducing device is selected, and a video to be encoded is selected from the video signals recorded on the selected medium. It is possible to obtain a system for interactively encoding a plurality of videos by specifying and encoding the portion accurately and with a desired image quality.

Next, a second embodiment of the present invention will be specifically described with reference to the drawings. Embodiment 2 FIG. FIG. 6 is a block diagram showing a video signal encoding system according to Embodiment 2 of the present invention. 50 ~
55 is the same as that of the first embodiment shown in FIG. 56 controls the first controller 54 to store MPEG data stored in a storage medium such as an HDD.
Is a third controller 56 such as a PC that operates the stream file of the third embodiment.

The control method of the video signal encoding system according to the second embodiment of the present invention will be described with reference to the main operation screen of the first controller 54 shown in FIG. 2 of the first embodiment.

A control method of the video signal encoding system according to the second embodiment of the present invention will be described with reference to the sub-operation screen of the first controller 54 shown in FIG. 3 of the first embodiment.

A part of the control method of the video signal encoding system according to the second embodiment of the present invention will be described with reference to the flowchart shown in FIG.

The operation of the first encoding device 51 of the video signal encoding system according to the second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.

FIG. 7 is a diagram for explaining a control method of the video signal encoding system according to the second embodiment of the present invention using an operation screen of the third controller 56. The operation screen is set by the first controller 54.
A selection field for selecting whether to encode a plurality of clips continuously into one file or to encode a plurality of clips into individual files, and when encoding a plurality of clips into one file continuously It is composed of a save file name setting field for setting the file name of the file.

FIG. 8 is a diagram for explaining a control method of the video signal encoding system according to the second embodiment of the present invention using a flowchart.

Next, the operation of the video signal encoding system according to the second embodiment of the present invention will be described in detail with reference to FIGS. 2, 3, 4, 5, 6, 7, and 8. This will be described with reference to the flowchart of FIG. At 90 in FIG. 8, the third in FIG.
All the clips be continuously encoded into one file on the operation screen of the controller 56? If Yes is selected in the Yes or No selection field, all clips set on the sub-operation screen of the first controller 54 in FIG. 3 are continuously encoded into one file. In the flowchart of FIG. 8, are all clips continuously encoded into one file on the operation screen of the third controller 56 of FIG. 7? The operation when "Yes" is selected in the selection field will be described. Also, are all clips continuously encoded into one file on the operation screen of the third controller 56 in FIG. 7? The operation when No is selected in the selection field is the same as that described in the first embodiment with reference to the flowchart of FIG.

At 90 in FIG. 8, on the setting screen of the third controller 56 of FIG. 7, all the clips set on the sub operation screen of the first controller 54 of FIG. 3 are continuously encoded into one file. And set the name of the file to be saved. However,
Of the number of encodings, the tape name, the encoding start time, the encoding end time, the bit rate, and the storage file name set on the sub-operation screen of the first controller 54 in FIG. , The save file name set on the setting screen of the third controller 56 in FIG. 7 is adopted. Therefore, the setting on the sub operation screen of the first controller 54 in FIG. Is used as an intermediate file setting. Also, the stream type is unified to one type of stream, which is the setting of the storage file.

Next, at 91 in FIG. 8, 61 to 61 in FIG.
According to 77, all the clips set on the sub operation screen of the first controller 54 in FIG. 3 are encoded. The operations of 61 to 77 in FIG. 4 are the same as those described in the first embodiment, and a description thereof will not be repeated. The operation of the first encoding circuit 51 at this time is the same as that described in Embodiment 1 with reference to FIG.

Next, at 92 in FIG. 8, according to the conditions set on the sub-operation screen of the first controller 54 in FIG. 3 at 91 in FIG. In order to continuously encode clips into one file and perform editing for joining all the files, stream conversion is performed to a stream level at which editing can be performed. The stream level at which editing can be performed is a stream of the MPEG standard, which is a PE among PS, TS, PES, and ES.
Stream level of S and ES. PS, TS
Each stream has a header such as ID information and a time code added thereto. In order to combine the streams coded at different stream levels into one, the stream is converted to a PES or ES stream with these removed. It is necessary to.

Next, in 93 of FIG. 8, the stream file for each clip, which has been stream-converted to the stream level that can be edited in 92 of FIG. , 1
To N clips.

Next, in 94 of FIG. 8, the stream file of each clip in 93 of FIG. 8 is combined with one stream in the order of 1 to N clips with the last clip as the N-th clip. Figure 7
The stream conversion is performed to the stream level of the storage file set on the setting screen of the third controller 56. With the above series of operations, the operation of continuously encoding all clips set on the sub operation screen of the first controller 54 of FIG. 3 into one file is completed.

In the video signal encoding system configured as described above, a video to be encoded is designated from the video signals reproduced from the video signal reproducing apparatus, and the portion is accurately encoded with a desired image quality. In addition, a system for interactively encoding a plurality of videos can be obtained.

Further, in the video signal encoding system configured as described above, a different bit rate is set for each clip, and encoding is performed at the set bit rate for each clip. Therefore, one video can be partially encoded at a different bit rate. Therefore, a complicated picture portion can be encoded at a high bit rate, and a simple picture portion can be encoded at a low bit rate. That is, it is possible to obtain a system capable of performing variable bit rate coding and performing efficient coding.

Next, a third embodiment of the present invention will be specifically described with reference to the drawings. Embodiment 3 FIG. FIG. 9 is a block diagram showing a video signal encoding system according to Embodiment 3 of the present invention. 50,
52 and 53 are the same as those shown in FIG. 57 is a second encoder, 5
Reference numeral 8 denotes a fourth controller such as a PC that supplies a control signal to the second encoding device 57. Note that the second encoding device 5
Reference numeral 7 denotes an encoding circuit 52 and a synchronization signal separation circuit 53.

The main operation screen of the fourth controller 58 for explaining the control method of the video signal encoding system according to the third embodiment of the present invention is the same as the first operation screen shown in FIG. Since this is the same as the main operation screen of the controller 54, the description will be made using this.

The sub operation screen of the fourth controller 58 for explaining the control method of the video signal encoding system according to the third embodiment of the present invention is the same as the first operation screen shown in FIG. Since it is the same as the sub operation screen of the controller 54, description will be made using this.

FIG. 10 is a view for explaining a control method of the video signal encoding system according to the third embodiment of the present invention using a flowchart.

Next, the operation of the video signal encoding system according to the third embodiment of the present invention will be described in detail with reference to FIGS. 2, 3, 9, and 10. 10 will be described according to the flowchart of FIG. 10. On the sub operation screen of the fourth controller 58 shown in FIG.
Various parameters for encoding, such as a tape name, encoding start time, encoding end time, and bit rate, and a save file name are set. The number of times of encoding is n, and the number of times of encoding of the last clip is N. At 101, the number of encodings is set to an initial value n = 0, and at 102, the number of encodings n
= 1 is set as the first clip, which is the clip with the number of encodings of 1. At this point, in 103, the encoding status display field on the main operation screen of the fourth controller 58 in FIG. 2 indicates that encoding is stopped. Then 10
In 4, the fourth controller 58 sets the tape name, the encoding start time, the encoding end time, various parameters of encoding such as the bit rate, and the save file name of the clip with the encoding number 1 set in 100. . Then 1
At 05, the fourth controller 58 obtains and sets the number of encoded frames from the encoding start time and the encoding end time set at 104. Next, at 106, the fourth controller 58 inquires whether or not the second encoding device 57 can start encoding. If encoding can be started, at 107, the fourth controller 5
8 rewinds the video signal reproducing apparatus 50 to a position before the encoding start time. Next, at 108, the fourth
The controller 58 transmits a reproduction start signal to the video signal reproduction device 50, and the video signal reproduction device 50 starts reproduction. Next, at 109, the time code of the video signal reproducing apparatus being reproduced is acquired, and at 110, the acquired time code is the number of offset frames set on the main operation screen of the fourth controller 58 in FIG. Is equal to or greater than the value obtained by subtracting, at 111, the fourth controller 58 issues an encoding start instruction to the second
Is transmitted to the encoding circuit 52 in the encoding device 57, and the synchronization signal separated from the video signal input from the video signal reproducing device 50 in the synchronization signal separating circuit 53 in the second encoding device 57. The start of the synchronization signal counter to be counted and various parameters of the encoding such as the bit rate set in 104 are set in the register in the encoding circuit 52. Note that, also in the encoding in the second encoding device 57, the fourth
After the controller 58 has transmitted the encoding start command,
The time required until the encoding circuit 52 actually starts encoding is not constant. This is because when the fourth controller 58 sets various coding parameters such as a bit rate in a register in the coding circuit 52, there is a time difference required for the setting depending on the type of setting. In order to solve this problem, according to the present invention, an offset frame is set in the offset frame setting column of FIG. It is designed to absorb the delay of the time required to start the conversion. Next, when a coding start command is transmitted in 111, a status display field on the operation screen of the fourth controller 58 in FIG.

At 111 in FIG. 10 described above, upon receiving the encoding start command transmitted from the fourth controller 58, the second encoding device 57 starts encoding. The controller 58 monitors whether the counter number of the synchronization signal counter started at 111 in FIG. 10 matches the number of encoded frames set at 105 in FIG. In 113 of FIG. 10, when the number of encoded frames and the number of synchronization signal counters match, the fourth
The controller 58 transmits an encoding stop command to the second encoding device 57 at 114 in FIG. In 115 of FIG. 10, the fourth controller 58 confirms that the encoding of the second encoding device 57 has stopped. In 116 of FIG. 10, the fourth controller 58 displays the code in the status display column on the operation screen of the fourth controller 58 of FIG. 10, the reproduction of the video signal reproducing device 50 is stopped at 117 in FIG. 10, and a series of encoding operations for one clip is completed. Further, if the number of encodings n is smaller than the number of encodings N of the last clip at 118 in FIG.
In FIG. 10, the encoding number n is increased by one.
Is set to the clip of the next number of encodings 2 set at 100 in FIG. At this point, in 103, the encoding status display field on the main operation screen of the fourth controller 58 in FIG. 2 indicates that encoding is stopped. next,
In 104, the fourth controller 58 sets the tape name, encoding start time, encoding end time, bit rate, and save file name of the clip of encoding number 2 set in 100. At this time, if the setting of the tape name of the previously encoded clip is different from the setting of the tape name of the clip to be encoded this time, the tape in the video signal reproducing device 50 is ejected, and the user changes the tape. Wait for. Hereinafter, the operations from 105 to 117 are performed in the same manner as in the case of the number of times of encoding 1, and a series of encoding operations for one clip is completed. Further, if the number of encodings n is smaller than the number of encodings N of the last clip at 118 in FIG.
Returning to step 102, if the number of encodings n is the number of encodings N of the last clip, the encoding operation of all the clips set in 100 is ended.

In the video signal encoding system configured as described above, a video to be encoded is designated from among the video signals reproduced from the video signal reproducing apparatus, and only that portion is accurately encoded with a desired image quality. And a system for interactively encoding a plurality of videos can be obtained with a simpler configuration.

Next, a fourth embodiment of the present invention will be specifically described with reference to the drawings. Embodiment 4 FIG. FIG. 11 is a block diagram showing a video signal encoding system according to Embodiment 4 of the present invention. 50,
52 and 53 are the same as those shown in FIG. Reference numeral 59 denotes a fifth controller such as a PC which controls the fourth controller 58 and operates an MPEG stream file stored in a storage medium such as an HDD. Since 57 and 58 are the same as those shown in FIG. 9 in the third embodiment, the description is omitted.

The main operation screen of the fourth controller 58 for explaining the control method of the video signal encoding system according to the fourth embodiment of the present invention is the same as the first operation screen shown in FIG. The description is omitted because it is the same as the main operation screen of the controller 54.

The sub operation screen of the fourth controller 58 for explaining the control method of the video signal encoding system according to the fourth embodiment of the present invention is the same as that of the first embodiment shown in FIG. The description is omitted because it is the same as the sub operation screen of the controller 54.

A flowchart for explaining a control method of the fourth controller 58 of the video signal encoding system according to the fourth embodiment of the present invention is the same as that shown in FIG. 10 of the third embodiment.

The operation screen of the fifth controller 59 for explaining the control method of the video signal encoding system according to the fourth embodiment of the present invention is similar to that of the fifth controller 59 shown in FIG. Since the operation screen is the same as that of FIG.

FIG. 12 is a view for explaining a control method of the video signal encoding system according to the fourth embodiment of the present invention using a flowchart.

Next, FIG. 2, FIG. 3, FIG. 7, FIG.
The operation of the video signal encoding system according to the fourth embodiment of the present invention will be described in detail with reference to FIG. This will be described with reference to the flowchart of FIG. At 120 in FIG.
Would you like to encode all clips continuously into one file on the operation screen of the fifth controller 59 in FIG. 7? When Yes is selected in the Yes or No selection field, all the clips set on the sub operation screen of the fourth controller 58 in FIG. 3 are continuously encoded into one file. In the flowchart of FIG. 12, is all clips continuously encoded into one file on the operation screen of the fifth controller 59 in FIG. 7? The operation when "Yes" is selected in the selection field will be described. Also, are all clips continuously encoded into one file on the operation screen of the fifth controller 59 in FIG. 7? No in the selection field of
The operation in the case where is selected is the same as that described in Embodiment 3 with reference to the flowchart in FIG.

At 120 in FIG. 12, in the setting screen of the fifth controller 59 in FIG. 7, all the clips set in the sub operation screen of the fourth controller 58 in FIG. And set the file name to be saved. However, FIG.
Of the number of encodings, the tape name, the encoding start time, the encoding end time, the bit rate, and the storage file name set on the sub operation screen of the fourth controller 58, the storage file name is finally Since the save file name set on the setting screen of the fifth controller 59 in FIG. 7 is adopted, the setting on the sub operation screen of the fourth controller 58 in FIG. Used as a file. Also, the stream type is unified to one type of stream, which is the setting of the storage file.

Next, at 121 in FIG. 12, according to 101 to 118 in FIG. 10, the fourth controller 58 in FIG.
All the clips set on the sub operation screen are encoded. The operations of 101 to 118 in FIG. 10 are the same as those described in the first embodiment, and a description thereof will not be repeated. The operation of the encoding circuit 257 at this time is the same as that described in Embodiment 1 with reference to FIG.

Next, at 122 in FIG. 12, according to the conditions set on the sub-operation screen of the fourth controller 58 in FIG. 3 at 121 in FIG. In order to continuously encode clips into one file, and to perform editing for connecting all clips, stream conversion is performed to a stream level at which editing can be performed.

Next, at 123 in FIG. 12, the stream file for each clip that has been stream-converted to the stream level that can be edited at 122 in FIG. , 1 to N clips.

Next, at 124 in FIG. 12, the stream file for each clip in 123 in FIG.
The last clip is set as the N-th clip, and the stream file that is connected to one clip in the order of 1 to N is stream-converted to the stream level of the storage file set on the setting screen of the fifth controller 59 in FIG. I do. With the above series of operations, the operation of continuously encoding all clips set on the sub operation screen of the fourth controller 58 in FIG. 3 into one file is completed.

In the video signal encoding system configured as described above, a video to be encoded is specified from the video signals reproduced from the video signal reproducing apparatus, and the portion is accurately encoded with a desired image quality. Furthermore, a system for interactively encoding a plurality of videos can be obtained with a simpler configuration.

Further, in the video signal encoding system configured as described above, a different bit rate is set for each clip, and encoding is performed at the set bit rate for each clip. Therefore, one video can be partially encoded at a different bit rate. Therefore, a complicated picture portion can be encoded at a high bit rate, and a simple picture portion can be encoded at a low bit rate. That is, it is possible to obtain a system for performing efficient coding that can perform variable bit rate coding with a simpler configuration.

[0064]

Since the present invention is configured as described above, it has the following effects.

According to the video signal encoding system of the present invention, a video to be encoded is specified from among the video signals reproduced from the video signal reproducing apparatus, and the portion is accurately encoded with a desired image quality. Further, a system for interactively encoding a plurality of videos can be obtained.

According to the video signal encoding system of the present invention, a video to be encoded is designated from among the video signals reproduced from the video signal reproducing apparatus, and that portion is accurately encoded with a desired image quality. By joining the encoded individual pieces of encoded data into one piece of encoded data, it is possible to obtain a system for encoding one image at a partially different bit rate.

According to the video signal coding method of the present invention, a video to be coded is specified from the video signals to be reproduced, the portion is coded accurately with a desired image quality, and a plurality of videos are further coded. A simple coding method for interactive coding can be obtained.

According to the video signal encoding method of the present invention, a video to be encoded is specified from the video signals to be reproduced, the portion is accurately encoded with a desired image quality, and the encoded individual By joining the coded data of (1) and (2) into one coded data, it is possible to obtain a simple coding method for coding one video at a partially different bit rate.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video signal encoding system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a main operation screen of a first controller of the video signal encoding system according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a sub operation screen of a first controller of the video signal encoding system according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a control method of a first controller of the video signal encoding system according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a control method of a second controller of the video signal encoding system according to the first embodiment of the present invention.

FIG. 6 is a block diagram of a video signal encoding system according to a second embodiment of the present invention.

FIG. 7 is a diagram showing an operation screen of a third controller of the video signal encoding system according to the second embodiment of the present invention.

FIG. 8 is a flowchart illustrating a control method of a third controller of the video signal encoding system according to the second embodiment of the present invention.

FIG. 9 is a block diagram of a video signal encoding system according to a third embodiment of the present invention.

FIG. 10 is a flowchart illustrating a control method of a fourth controller of the video signal encoding system according to the third embodiment of the present invention.

FIG. 11 is a block diagram of a video signal encoding system according to a fourth embodiment of the present invention.

FIG. 12 is a flowchart illustrating a control method of a fifth controller of the video signal encoding system according to the fourth embodiment of the present invention.

FIG. 13 is a block diagram illustrating an example of a conventional video signal encoding system.

14 is a diagram showing an example of the contents of the code data control process in FIG.

FIG. 15 is a diagram showing an example of code data created by the system of FIG.

[Explanation of symbols]

50 video signal reproducing device, 51 first encoding device, 5
2 coding circuit, 53 synchronization signal separation circuit, 54 first controller, 55 second controller, 56 third
Controller, 57 second encoder, 58 fourth encoder
Controller, 59 fifth controller

Claims (4)

[Claims] 1. A video signal reproducing device, an encoding circuit for encoding an output signal of the video signal reproducing device, a control means for controlling a reproduction or stop operation of the video signal reproducing device, Setting means for setting the number of times of coding, a coding parameter or a time until the start of coding, and a signal coded in the past and a signal to be coded this time are recorded on the same medium in the video signal reproducing apparatus. Determining means for determining whether or not the signal output from the video signal reproducing apparatus is a set frame, and determining coding start of the coding circuit according to the determination result. Means for counting the number of frames from a synchronization signal included in a signal output from the video signal reproducing apparatus, and when the number of frames is equal to a set number of frames, the code of the encoding circuit is counted. A video signal encoding system comprising an encoding stop determining means for determining an encoding stop. 2. A system according to claim 1, further comprising means for performing stream conversion on a plurality of coded data coded based on the number of times of coding set by said setting means and joining them to one coded data. The video signal encoding system according to claim 1. 3. A step of setting a name of a medium on which a signal to be encoded is recorded, an encoding start time, an encoding end time, an encoding bit rate, and the number of encodings using the storage file name as an encoding unit (clip); Obtaining the number of encoded frames based on the encoding start time and the encoding end time,
Selecting a medium on which the signal to be encoded is recorded,
Setting a reproduction start position of the selected medium based on the encoding start time, starting a reproduction operation of the medium based on the reproduction start signal, time information of the reproduced signal, an encoding start time and an offset frame set Generating an encoding start signal based on the number, starting counting a synchronization signal included in the signal reproduced based on the encoding start signal, detecting that the synchronization signal count matches the number of encoded frames. And generating a coding stop signal and a reproduction stop signal, and repeating the above steps until the number of times of coding reaches a predetermined value. 4. The video signal encoding method according to claim 3, further comprising the step of performing stream conversion on the encoded data of each of the encoded clips and joining them to one encoded data.