WO1996005697A1 - Video signal editing device - Google Patents
Video signal editing device Download PDFInfo
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- WO1996005697A1 WO1996005697A1 PCT/JP1995/001616 JP9501616W WO9605697A1 WO 1996005697 A1 WO1996005697 A1 WO 1996005697A1 JP 9501616 W JP9501616 W JP 9501616W WO 9605697 A1 WO9605697 A1 WO 9605697A1
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Definitions
- the present invention relates to a video signal editing apparatus for connecting a plurality of coded video signals compressed and coded by inter-code compression and coding to one and editing the coded video signals.
- a video signal compression / coding device Focusing on the correlation of video data between multiple frames included in a video signal (video signal), for example, applying an image compression technology based on MPEG (Motion Picture Expo rt Group) to A video signal compression / coding device has been put to practical use in which a video signal is compressed between frames so as to have a correlation between a plurality of frames, and is coded to generate a coded video signal.
- the coded video signals compressed and coded by such a video signal compression and coding apparatus are grouped into a plurality of frames as units for decoding.
- editing work is performed by connecting a plurality of coded video signals that have been subjected to inter-frame predictive coding (inter-frame compression / coding).
- inter-frame compression / coding inter-frame predictive coding
- a bidirectional frame that requires video data of adjacent frames when the two encoded video signals a and b respectively decode such a disturbance of the video signal, and the video data of the frame.
- Intra-frames I-frames
- B-frame and I-frame The case where two frames form one group will be described as an example.
- the present invention has been made in view of the above-described problems of the related art. Even when a video signal encoded by inter-frame encoding is connected and edited, a video signal obtained as a result of editing is obtained. It is an object of the present invention to provide a video signal editing apparatus in which a video is not disturbed even when an image is reproduced by decoding the video.
- a video signal editing apparatus for connecting a plurality of encoded video signals, wherein each of the encoded video signals is composed of a plurality of frames including at least one intraframe.
- the intra frame is encoded so that the original video data can be decoded only from the video data included in the frame, and the inner frame is a frame other than the inner frame of the group.
- the video data requires the video data of another frame when decoded to the original video data, and the plurality of codes are used at the timing of connecting the coded video signal.
- Signal processing means for partitioning each of the encoded video signals such that the boundary of the group is at an end of the encoded video signal; and a code separated by the signal processing means.
- Video signal editing device having a means superimposing a video signal for connecting superimposed video signal is provided.
- the signal processing means when decoding the video data of the B frame or the frame, so that each of the encoded video signals to be connected can be completely decoded by the respective encoded video signal.
- a forward frame (P frame) that requires the video data of one frame does not come to the end connected to another coded video signal. Cut as you like.
- the signal processing means sends the first frame or the last frame (group boundary) or I frame of the group to the end of each of the coded video signals connected to the other coded video signals. (Cut).
- the signal superimposing means superimposes the coded video signals separated by the signal processing means, and adds a margin (overlapping portion) so that the video signal is not lost.
- FIG. 1 is a diagram showing a configuration of a video signal editing device of the present invention
- FIGS. 2A and 2B are diagrams illustrating an SDI format as an example of a first transmission format of a video signal according to the present invention.
- 3A and 3B are diagrams illustrating the SDDI format as an example of the second transmission format of the video signal according to the present invention.
- FIGS. 4A and 4B are diagrams showing the detailed configuration of the ancillary part of the SDDI format shown in FIGS. 3A and 3B.
- Fig. 5 is a diagram for explaining the operation of the video signal editing apparatus shown in Fig. 1.
- Fig. 5A shows the timing at which two types of encoded video signals X and Y in the SCSI format are output from the magneto-optical disk drive.
- 5B shows the timing at which the GOP of the coded video signal is output from the connection device, and
- FIGS. 5C and 2D show the timing at which the coded video signals X and Y are decoded by the two decoding circuits, respectively.
- FIG. 5A shows the timing at which two types of encoded video signals X and Y in the SCSI format are output from the magneto-optical disk drive.
- 5B shows the timing at which the GOP of the coded video signal is output from the connection device
- FIGS. 5C and 2D show the timing at which the coded video signals X and Y are decoded by the two decoding circuits, respectively.
- FIG. 5A shows the timing at which two types of encoded video signals X and Y
- FIG. 6 is a diagram showing an encoded video signal output from the connection device shown in FIG. 1 when the B frame and the I frame of each of the encoded video signals X and Y hit the editing position.
- FIG. 6B is a diagram showing the relationship between the editing position and the frames of the coded video signals X and Y.
- FIG. 6B is a diagram showing the contents of the coded video signal in SDDI format output from the connection device.
- C is a diagram in which the SDDI format signal shown in FIG. 6B is converted to an SDI format signal.
- Figure 7 shows the I and B frames of the coded video signals X and Y at the editing position.
- Fig. 7A is a diagram showing an encoded video signal output from the connection device shown in Fig. 1 when a hit occurs
- Fig. 7A is a diagram showing a relationship between an editing position and frames of encoded video signals X and Y.
- Fig. 7B is a diagram showing the contents of the coded video signal output from the connection device.
- Fig. 8 shows the connection device shown in Fig. 1 when the B frames of the coded video signals X and Y hit the editing position.
- FIG. 8A is a diagram showing an encoded video signal output from a device
- FIG. 8A is a diagram showing a relationship between an editing position and frames of encoded video signals X and Y
- FIG. It is a diagram showing the contents of the encoded video signal
- FIG. 9 is a diagram showing an encoded video signal output from the connection device shown in FIG. 1 when the I-frame of each of the encoded video signals X and Y hits the editing position.
- FIG. 9B is a diagram illustrating the relationship between encoded video signals X and Y and frames, and FIG. 9B is a diagram illustrating the content of the encoded video signal output from the connection device;
- FIGS. 10 and 11 are flowcharts showing the signal processing for editing shown in FIGS. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram showing a configuration of a video signal editing device 1 of the present invention.
- the video signal editing device 1 includes a magneto-optical disk drive (M0 drive) 20 for reproducing an encoded video signal from a magneto-optical disk (MO) 10 on which a video signal is encoded and recorded. It comprises a connection device 30, a decompression / decoding device 40 and a terminal device 60.
- M0 drive magneto-optical disk drive
- MO magneto-optical disk
- a coded video signal compressed and coded by inter-frame predictive coding (inter-frame compression, coding) by the MPEG (Motion Picture Expert Group) method is recorded.
- an encoded video signal recorded on the MO disk 10 needs video data of both adjacent frames when decoding the video signal of that frame.
- Bi-directional frame (B frame) The video signal and the intra-frame that is completed by the video data of the frame itself and does not require the video data of another frame when decoding the video data of the frame (I-frame)
- the video signal is alternately included, and the B-frame video signal and the I-frame video signal are arranged in this order, and one group is composed of two frames (this is referred to as Group Of Picture (GOP )).
- GOP Group Of Picture
- an identification flag used to identify each of the two types of coded video signals X and Y is provided.
- the # 0 disk drive 20 reads the encoded video signal recorded on the # 10 disk 10 via the optical head 22 in a predetermined order and timing according to the editing position specified by the terminal device 60. .
- a method of reading the encoded video signal recorded on the # 0 disk 10 in the # 0 disk drive 20 will be described later with reference to FIGS.
- the editing position specified by the terminal device 60 described above is specified by a time code that is used in a VTR editing or the like. Whether the specified time code is an I-frame or an I-frame is determined when encoding a video signal. In the present embodiment, it is determined that the ⁇ frame is an even frame of the time code and the I frame is an odd frame.
- Signal conversion 'Connecting device 30 is a SCS I (Sma 11 Comparator Small Interface) data conversion circuit 32 buffer memory 34 parallel serial (P / S) conversion circuit 36, control circuit with built-in computer (CPU) 38 and an identification flag insertion circuit 39.
- SCS I Serial Cipheral Component Interconnect Express
- the SCS I data conversion circuit 32 converts the SCS I coded video signal read from the M0 disk 10 into a normal coded video signal (in this embodiment, an SDI format video signal). Output to buffer memory 34.
- the buffer memory 34 seeks on the M0 disk 10 as described below with reference to FIG. 5A.
- Coded video signals X and Y having time intervals that are equal to each other are converted into a signal with a transmission speed between the connection device 30 and the decompression / decoding device 40, multiplexed, and converted to a P / S conversion circuit 36.
- the PZS conversion circuit 36 converts the encoded video signal stored in the buffer memory 34 into a serial signal (in this embodiment, an SDDI format video signal) and outputs it to the decompression / decoding device 40. .
- the control circuit 38 controls each component of the signal conversion / connection device 30.
- the decompression / decoding device 40 includes a serial / parallel (SZP) conversion circuit 42, an identification flag extraction circuit 43, a decompression / decoding circuit 44, 46, a selector circuit 48, a frame memory 50, and a serial data interface. (SDI) conversion circuit 52 and a control circuit 54 with a built-in converter.
- SZP serial / parallel
- SDI serial data interface.
- the SZP conversion circuit 42 converts a serial encoded video signal (in this embodiment, an SDDI format video signal) input from the PZS conversion circuit 36 of the connection device 30 into a parallel format signal. I do.
- the coded video signals X and Y are mixed and input to the SZP conversion circuit 42.
- the decompression / decoding circuits 44 and 46 are provided in two systems to enhance the performance of signal processing. These decompression and decoding circuits 44 and 46 are decomposed so that the coded video signal X is processed by the decompression and coding circuit 44, and the coded video signal Y is processed by the decompression and coding circuit 46. Can also be processed. In that case, the control circuit 54 operates based on the video signal type identification flag extracted by the identification flag extraction circuit 43, and operates the first decompression / encoding circuit 44 in the case of the encoded video signal X, The result is controlled so as to be output from the selector circuit 48.
- the second The decompression / encoding circuit 46 is operated, and the result is controlled so as to be output from the selector circuit 48.
- the decompression and decoding circuits 44 and 46 are each capable of decoding both the coded video signals X and Y.
- the signal arriving at the conversion circuit 42 is input to both the decompression and decoding circuits 44 and 46, and the identification flag extraction circuit 43 applied to the decompression and decoding circuits 44 and 46 from the control circuit 54.
- the corresponding decompression / decoding circuit 44 or 46 performs processing by referring to the extracted video signal type identification flag, and the result is output from the selector circuit 48 that operates in response to a command from the control circuit 54. You can also.
- control operation of the control circuit 54 is performed not only by the video signal type identification flag but also by the control circuit 54 referring to the GOP indicating the editing position (switching position) and the effective number.
- the selector circuit 48 is expanded according to the above-described control of the control circuit 54.
- either the expanded or decoded video signal X or Y is selected and output to the frame memory 50.
- the frame memory 50 stores the video signal output from the selector circuit 48 in frame units.
- 268 words from the fifth mode to the 272nd mode are used as a horizontal ancillary data ANC, and a header, auxiliary data, audio data, and the like are stored.
- the 4 words from the 273rd to the 276th code indicate the start of the active video section AC V, a code that separates the ancillary data from the ancillary section, and the active video section start code.
- SAV Startof Active Video
- the 4-word code SAV is expressed in hexadecimal notation, and is 3FF, 000,000,000, XYZ (arbitrary data). In other words, EAV and SAV have the same data in the first three words.
- Both the NTSC 525 system and the PAL 625 system have an active video section ACV (Acti Ve Video) of 1440 words in the horizontal direction, where video signals are stored. Is done.
- ACV Acti Ve Video
- the 525 line (in the case of the NTS C 525 system) is divided into two large areas. That is, NTSC
- the SDI format signal described above is a 270 Mbps serial transmission signal And transmitted and received between devices such as an editing device.
- Standards SMPTE-259 is a signal standard for D1 format or D2 format, which is basically a digital signal standard. Therefore, an SDI format signal is also used for transmission as a D1 format or D2 format digital AV signal.
- the transmission speed (transmission frequency) of SDI format signals is as high as 270 MHz.
- the amount of signals that can be transmitted is limited to only one digital video signal channel, and further to eight baseband audio signal channels. As a result, transmission limitations may be encountered when using the SDI format.
- the applicant of the present application has taken advantage of the advantages of the SDI format, partially maintaining the commonality with the SDI format, and is not only suitable for multimedia or multi-channel, but also It proposes a new digital data format that is suitable for data communication systems such as Cal Area Network (LAN), Ethernet (Ethernet), and Token Ring. (For example, see Japanese Patent Application No. 6-144,403, filed on June 27, 1994, “Digital signal transmission method, digital signal transmitting and receiving apparatus, and transmitting and receiving apparatus”. ).
- the new format proposed by the applicant is called "Serial Digital Data 'Interface (SDD I)" format.
- FIG. 3A is a diagram illustrating the SDD I format
- FIG. 3B is a diagram illustrating the configuration of the SDD I format transmission bucket illustrated in FIG. 2A.
- FIG. 4A is a diagram showing the data included in the ancillary data part AN of the SDD I format transmission bucket shown in FIG. 3B, in particular, the configuration of a header (HEADER).
- FIG. 4A is a diagram showing the position of the header data shown in FIG.
- the numbers in parentheses indicate the values of the video signal of the PAL 625 system, and the numbers without the parentheses indicate the values of the video signal of the NTSC 525 system.
- the numbers in parentheses indicate the values of the video signal of the PAL 625 system, and the numbers without the parentheses indicate the values of the video signal of the NTSC 525 system.
- the NTSC 525 system will be described.
- the 268 words from the 5th to the 2721st are used as the ancillary data part ANC, and the header, auxiliary data, etc. are stored.
- each line in the case of the NTSC 525 system, it indicates the start of the 4-word payload section PAD (active video section ACV) from the 273rd to the 276th pad, and the code SAV (S tartof Active Video) is stored.
- PAD active video section ACV
- SAV S tartof Active Video
- Both the capacity in the case of the NTSC 525 system and the capacity in the case of the PAL 625 system are also provided with a 1440-word payload section PAD in the horizontal direction, in which video signals and audio signals are stored.
- the audio signal was stored only in the ancillary part ANC, but in the SDDI format, not only the video signal but also the audio signal can be stored in the payload PAD.
- an overlapping portion (gap) is added to the video signal, and information indicating the switching position accurately, GOP Number, effective number, and video signal type X or Y, or the information is transferred to the Video Control Command and (not shown) of the payload part PAD of the SDDI format. Set so that GOP can be understood.
- the end code EAV of the active video section is the same as the EAV of the SDI signal, and the first three bits are the same, 3FF, 000,000,000, XYZ.
- the EAV is followed by the Ancillary Delight Club ANC, which is specific to the SDD I format. Itadade is located at the head of the Ancillary Departure ANC in the SDD I format transmission bucket.
- the data length, frame configuration, and data transmission speed of each line of the SDI format and the SDD I format are the same, and the transmission packet of the SDI format and the transmission packet of the SDD 1 format are the same. Has commonality.
- Each line of the video signal of the SDDI format has the same number of words per line in the horizontal direction (1 724 for a 10-bit Z word), similarly to the lines of the video signal of the SDI format. (1 716) words) and the same number of lines in the vertical direction (525 (625) lines).
- the codes of SDI format are SAV, EAV, ancillary data section ANC and active video section ACV, ACV. 2 includes the separation codes SAV, EAV, ancillary data part ANC, and payload part PAD (data part DT), respectively.
- Both SDI and SDDI format signals are converted to 270 Mbps serial transmission signals and transmitted and received. Therefore, signal processing can be performed at the same speed.
- the SDDI format differs from the SD I format in that the audio signal is not included in the ANC data of the ancillary data area, and the audio signal is included in the payload. And a video signal.
- the frame of the SDDI format signal does not include a portion corresponding to the vertical blanking portion VBK of the SDI video signal.
- the data is read from the MO disk 10 in the SDI format, output from the PZS conversion circuit 36 in the SDDI format, and expanded / decoded.
- the inside of the device 40 is processed in the SDDI format, converted into an SDI format signal by the SDI conversion circuit 52, and output to the outside.
- FIG. 5A to FIG. 5D to FIG. 9A, FIG. 9B, and FIG. 10 and FIG. 11 a case where the coded video signal Y is inserted into the coded video signal X will be specifically described.
- the operation of the video signal editing device 1 will be described as an example.
- FIGS. 5A to 5D are signal form diagrams for explaining the operation of the video signal editing apparatus 1 shown in FIG. 1, and FIG. 5A shows an encoded video signal X, Y from the M0 disk drive 20 in the SCS I format. 5B shows the timing at which GOPs indicating the editing positions (switching positions) of the video signals X and Y are output from the signal conversion / connection device 30, and FIG. 5C and FIG. D indicates the timing at which the coded video signals X and Y are decoded by the decompression and decoding circuits 44 and 46, respectively.
- the M0 disk drive 20 reads the coded video signals X and Y at the timing shown in FIG. 5A in the order and the time length specified via the M0 disk 10 and the terminal device 60, and performs signal conversion. Output to the connection device 30. There is an interval between the encoded video signals X and Y read from the M0 disk drive 20 for the time required for seeking on the M0 disk 10 (SEEK).
- the encoded video signal read from the M ⁇ disk 10 is input to the buffer memory 34 via the SCS I data conversion circuit 32.
- the buffer memory 34 converts the speed of the encoded video signal, multiplexes it, and outputs it to the PZS conversion circuit 36.
- the three conversion circuit 36 converts the coded video signal into a serial video signal and transmits it to the decompression / decoding device 40.
- the SZP conversion circuit 42 in the decoding device 40 The PZS converter 36 converts the SDD-format coded video signal transmitted from the PZS conversion circuit 36 into a parallel format video signal.
- the coded video signals X and Y output from the SZP conversion circuit 42 to the decompression-decoding circuits 44 and 46 are, as shown by the shaded portions in FIGS. 5C and 5D, X and Y are transmitted from the signal conversion / connection device 30 so as to partially overlap each other in order to enable complete decoding.
- overlap (overlapping portion) The overlapped portion of these coded video signals X and Y is referred to as “overlap (overlapping portion)” in this specification. It is the intention of the present invention to add a margin to prevent video signal disturbance at the editing position.
- the number of GOPs in the serial encoded video signal that is, the SDDI format video signal
- the number of GOPs, the effective number, and the video signal type X or Y are required.
- the information indicating these editing positions (switching positions) can be found in the video control section (not shown) of the payout section PAD of the SDDI format so that the G0P of the switching partner can be found. Set.
- the decompression and decoding circuit 44 decompresses and decodes the coded video signal X input from the SZP conversion circuit 42.
- the decompression / decoding circuit 44 extracts the identification flag extraction circuit 43 and inputs it to the decompression / decoding circuit 44 via the control circuit 54. Only when the flag value is set and the identification flag of each frame of the input coded video signal matches the set value, the video data of each frame of the coded video signal is expanded and decoded. To generate the original video signal X or Y, and notifies the control circuit 54 of the matching of the identification flag.
- the decompression / decoding circuit 46 also performs the same operation as the decompression / decoding circuit 44 for the coded video signal Y or X, generates the original video signal Y or X from the coded video signal Y, and sets the identification flag. The coincidence is notified to the control circuit 54.
- the selector circuit 48 selects one of the video signals X and Y generated by the decompression / decoding circuits 44 and 46 and outputs it to the frame memory 50 under the control of the control circuit 5.
- decompression * Either of the decoding circuits 44 and 46 matches the identification flag.
- the video signal output from one of the decompression and decoding circuits 44 and 46 first is output.
- the video signal is output until the video signal ends, and another video signal is output after the video signal ends.
- the frame memory 50 stores the video signal input from the selector circuit 48 in frame units, and the conversion circuit 52 converts the video signal stored in the frame memory 50 into an SDI video signal. Output as Combination of frames for editing position
- FIG. 10 is a flowchart illustrating this.
- the MO disk drive 20 reads an encoded video signal from the MO disk 10 for each combination of frames with respect to the editing position and transmits the coded video signal from the signal conversion / connection device 30 will be described.
- the coded video signals X and Y become a B-frame video signal and an I-frame video signal, respectively, if they are read as they are (divided), the coded video signal Y is completely converted. Decompression / decoding power The encoded video signal X cannot be completely decompressed and decoded. In such a case, the MO disk drive 20 applies the following encoded signal X2 I-frame video signal to the encoded signal X2 B-frame video signal shown in FIG. Add and read. As a result, as shown in FIG. 6B, only the coded video signal X (XI) is output from the signal conversion / connection device 30 to the GOPs before the “next margin” portion. In the GOP corresponding to the margin j, the encoded video signal X2 and the encoded video signal Y2 are included. The encoded video signal Y (Y3, ⁇ 4,...) Is output to the G ⁇ P after the output and the “paste”.
- FIG. 6C illustrates an encoded signal of the SDI format expanded and decoded by the decoding circuits 44 and 46, which expands the SDDI format signal shown in FIG.
- the information indicating the switching position that is, the number of GOPs, the effective number, and the types of video signals X and ⁇ are, as described above, the Video Control Comm of the payload portion PAD of the SDDI format (FIG. 3B). And (not shown) is set so that the G0P of the switching partner is known. Therefore, the controller 54 performs switching control with reference to these pieces of information.
- the encoded video signal X and Y become an I-frame video signal and a B-frame video signal, respectively, the encoded video signal X can be completely decompressed and decoded if read out as it is.
- the decoded video signal Y cannot be completely decompressed and decoded.
- the M0 disk drive 20 reads the encoded video signal Y from the encoded video signal Y2 of the GOP immediately before the editing position.
- the signal conversion / connection device 30 outputs an encoded video signal similar to that shown in FIG. 6B.
- both coded video signals X and Y are B-frame video signals, if they are read as they are, both coded video signals X and Y are completely decompressed and cannot be decoded. turn into.
- the M0 disk drive 20 reads out the coded video signal X by adding the I-frame video signal of the coded video signal X2, as shown in signals a and b in FIG. 8B, respectively.
- the coded video signal Y is read out from the coded video signal Y2 immediately before the editing position, and is converted into a signal.
- the signal is output from the connection device 30 at one of the timings of the signals a and b in FIG. 5B. Either of these methods can completely decompress and decode both the coded video signals X and Y, so a method suitable for the actual configuration of the video signal editing device 1 is adopted. Can be used.
- both the coded video signals X and Y are I-frame video signals
- both of the coded video signals X and Y can be completely expanded and decoded even if they are read as they are.
- the MO disk drive 20 reads out the coded video signal X2 up to the coded video signal X2 as shown by the signals a and b in FIG.
- Y a method of reading from the editing position or from the position immediately before the editing position can be considered.
- both of these methods can completely decompress and decode both of the coded video signals X and Y, so that the actual configuration of the video signal editing device 1 can be improved. Any suitable method can be employed.
- a plurality of coded video signals from the MO disk 10 are converted into predetermined frames determined by a relationship between an editing position and a frame of the coded video signal. Readout by the MO disk drive 20 and multiplexing by the signal conversion and connection device 30 so that they can be easily connected and edited, and the video signals obtained as a result of the editing are distorted. Absent.
- the video signal editing apparatus 1 when the video signal editing apparatus 1 reads the encoded video signal from the MO disk 10 with the MO disk drive 20, the frame for completely expanding and decoding the encoded video signal is read.
- the coded video signal after reading the coded video signal from the MO disk 10, the coded video signal is stored in the memory once, the frame to be added is determined, and the frame is added. It may be configured. In this way, even if the configuration is such that a predetermined frame is added after being stored in the memory once, as shown in the first embodiment, the MO disk drive 20 Even if a configuration is adopted in which a predetermined frame is added at the time of reading, these are equivalent in the sense that an encoded video signal is divided.
- the method of reading the encoded video signal from the MO disk 10 shown in FIGS. 6 to 9 is an example, and the rule may be set so that, for example, the portion of “the margin” becomes wider.
- the format of the signal output from the decompression / decoding device 40 is not limited to the SDI format, but may be another signal format.
- the signal read from the MO disk drive 20 with a margin is processed in the signal conversion / connection device 30 (editing device) according to the process of the flowchart shown in FIG. Second embodiment
- the MO disk 10 has four frames, ie, the first B frame, the I frame, the second B frame, and the video data of the frame when decompressing and decoding the video data.
- a forward frame (P frame) which requires the video data of the preceding I frame, and a coded video signal arranged in this order are recorded.
- the editing position is at the beginning of the coded video signal, read from the beginning of the previous GOP only when the previous frame of the coded video signal is the first B frame, otherwise, the same G0P If it is read from the beginning and the editing position is at the end of the encoded video signal, it is sufficient to read up to P frames of the same GOP.
- the I and P frames before and after necessary for decompression / decoding are in the same GOP, so they are read from the beginning of the same GOP.
- the I frame required for decompression and decoding is in the same GOP, so it is read from the beginning of the same GOP.
- the last frame in G0P is a P frame, and no matter which frame the editing position hits, the next G0P is not required for decoding. ⁇ It is sufficient to read up to P P frames.
- the editing position falls on the second B frame, the next I frame of G0P or the same G ⁇ P or the P frame of another G ⁇ P before it is extracted.
- each coded video signal after connection can be completely expanded and decoded.
- the length of the “gap” portion may be determined according to the actual configuration of the video signal editing device 1.
- the rules for reading the coded video signal from the M0 disk 10 described above are based on the GOP configuration in which one or more B frames, one I frame, and one or more P frames are arranged in an arbitrary order. It is common when reading M0 disk 10 that has.
- the G0P configuration is composed of one or more B frames, one I frame, and one or more B frames.
- the above P frames are arranged in an arbitrary order, it is possible to connect and edit any coded video signal.
- the decompression / decoding circuit 44 is configured for an encoded video signal having the configuration of G ⁇ P shown in the second embodiment, and the decompression / decoding circuit 46 is shown in the first embodiment.
- the video signal editing apparatus 1 can be configured as an apparatus for connecting encoded video signals having different G ⁇ P configurations by configuring for an encoded video signal having a GOP configuration.
- the video signal editing apparatus of the present invention can have various configurations as shown in each embodiment and as shown in the modified examples described here.
- a hard disk and a hard disk drive can be used in place of the MO disk 10 and MO disk drive 20, respectively.
- the video signal editing device of the present invention it is possible to connect and edit video signals that have been compressed and encoded by inter-frame encoding.
- the video signal editing apparatus of the present invention can be used for editing a video signal in a broadcasting station or the like.
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- Compression Or Coding Systems Of Tv Signals (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50640396A JP3713715B2 (ja) | 1994-08-12 | 1995-08-14 | ビデオ信号編集装置 |
US08/628,616 US5696557A (en) | 1994-08-12 | 1995-08-14 | Video signal editing apparatus |
EP95928027A EP0734159B1 (en) | 1994-08-12 | 1995-08-14 | Video signal editing device |
DE1995635627 DE69535627T2 (de) | 1994-08-12 | 1995-08-14 | Editiervorrichtung für videosignale |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP19074694 | 1994-08-12 | ||
JP6/190746 | 1994-08-12 |
Publications (1)
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WO1996005697A1 true WO1996005697A1 (en) | 1996-02-22 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/001616 WO1996005697A1 (en) | 1994-08-12 | 1995-08-14 | Video signal editing device |
Country Status (5)
Country | Link |
---|---|
US (1) | US5696557A (ja) |
EP (2) | EP0734159B1 (ja) |
JP (1) | JP3713715B2 (ja) |
DE (1) | DE69535627T2 (ja) |
WO (1) | WO1996005697A1 (ja) |
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GB0007868D0 (en) * | 2000-03-31 | 2000-05-17 | Koninkl Philips Electronics Nv | Methods and apparatus for editing digital video recordings and recordings made by such methods |
WO2003034725A1 (fr) * | 2001-10-18 | 2003-04-24 | Matsushita Electric Industrial Co., Ltd. | Appareil et procede de reproduction video/audio, programme et support correspondants |
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JP4297121B2 (ja) * | 2006-03-01 | 2009-07-15 | ソニー株式会社 | 再生装置および再生方法 |
JP4221676B2 (ja) * | 2006-09-05 | 2009-02-12 | ソニー株式会社 | 情報処理装置および情報処理方法、記録媒体、並びに、プログラム |
JP2008066851A (ja) * | 2006-09-05 | 2008-03-21 | Sony Corp | 情報処理装置および情報処理方法、記録媒体、並びに、プログラム |
US8526489B2 (en) * | 2007-09-14 | 2013-09-03 | General Instrument Corporation | Personal video recorder |
JP2009077105A (ja) * | 2007-09-20 | 2009-04-09 | Sony Corp | 編集装置および編集方法、プログラム、並びに記録媒体 |
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Also Published As
Publication number | Publication date |
---|---|
DE69535627D1 (de) | 2007-12-06 |
DE69535627T2 (de) | 2008-07-24 |
EP1628306A3 (en) | 2007-02-28 |
EP0734159B1 (en) | 2007-10-24 |
JP3713715B2 (ja) | 2005-11-09 |
EP1628306A2 (en) | 2006-02-22 |
US5696557A (en) | 1997-12-09 |
EP0734159A4 (en) | 2001-02-07 |
EP0734159A1 (en) | 1996-09-25 |
EP1628306B1 (en) | 2011-12-07 |
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