JP2008283663A - Information processing apparatus, information processing method, recording medium, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To start re-encoding an editing material prior to determining an editing point. <P>SOLUTION: An editing processing control section controls decoding of a background encoded stream at the editing point of assemble editing and controls encoding of each GOP until determining an IN point. When there is no IN point in the GOP, an edited stream selection section discards encoded data of the GOP encoded and stored in a memory 43 and when there is an IN point within the GOP, encoded data of the GOP encoded and stored in the memory 43 are adopted as an edited encoded stream. The present invention can be applied to an editing apparatus. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing device, an information processing method, a recording medium, and a program, and more particularly, to an information processing device, an information processing method, a recording medium, and a program that are suitable for use in editing processing.

  Conventionally, in order to perform an editing process for connecting two encoded streams, each of the editing target compressed video data 1 and the editing target compressed video data 2 is partially decoded in the vicinity of the editing point and partially uncompressed. After the video signal 1 and the video signal 2 are obtained and connected at a predetermined editing point, the portion is re-encoded, and the re-encoded compressed video data is not decoded and re-encoded (partial). There is a technique that is combined with compressed video data (other than the vicinity of an edit point where decoding has been performed) (see, for example, Patent Document 1).

JP 2006-67095 A

  In Patent Document 1 described above, the vicinity of the edit points of the two encoded streams is once decoded and connected, and then the encoding process is executed again. There may be a case where an editing process using a band input signal is executed.

  Referring to FIG. 1, for example, an assemble edit that connects an output obtained by decoding a first stream, which is an editing material recorded on a predetermined recording medium, and an SDI input that is a baseband input signal at an edit point A process for performing encoding and obtaining an encoded stream in an edited state will be described.

  The first encoded stream is input to the decoder and decoded. The decoder output is supplied to the encoder from the beginning of the GOP including the edit point, and encoding is started so that the same portion of the original encoded stream and VBVoccupancy (occupancy of the VBV buffer) are continuous. The At the editing point, the input to the encoder is switched to the SDI input, and the SDI signal is continuously encoded.

  In other words, the encoding start point is before the editing point.

  Next, referring to FIG. 2, for example, in the first stream as the editing material recorded in the predetermined stream, the SDI input is overwritten in the predetermined area defined by the IN point and the OUT point. Processing for executing the editing and obtaining an encoded stream in an edited state will be described.

  Connection at the IN point is performed in the same way as in assemble editing. As for the OUT point, decoding of the first encoded stream is started at the beginning of the GOP including the OUT point, and the input to the encoder is the decoder output of the first encoded stream from the SDI signal at the editing point. Is switched to. And, similar to the re-encoding process in the editing process described in Japanese Patent Application Laid-Open No. 2006-67095, the GOP including the editing point and the subsequent re-encoding process to the VBVoccupancy target point after a predetermined frame as necessary The generated code amount is adjusted so that encoding is performed so as to match the VBVoccupancy target value determined so that the VBVoccupancy target point and VBVoccupancy of the original encoded stream are continuous.

  In insert editing, as in assemble editing, at the IN point, the encoding start point is earlier than the editing point, and at the OUT point, the VBVoccupancy matching encoding process starts before the editing point. The point is ahead in time. The connection point with the first encoded stream that is not re-encoded is later in time than the OUT point that is the editing point.

  That is, in insert editing, the area where data is overwritten on the original encoded stream is an area wider than the range defined by the IN point and OUT point.

  Whether it is assemble editing or insert editing, GOP encoding including edit points must be set from the GOP break before the edit points, so if the edit points are not determined in advance, Decoding and encoding cannot be started.

  Therefore, a case where the baseband input is independently encoded to generate a second encoded stream and the result is editing between streams similar to the editing process described in JP-A-2006-67095 described above. 3 will be described.

  Monitoring to determine the edit point uses the decoded output of the first encoded stream and the SDI input that is the baseband signal, but these baseband signals are used independently only to determine the edit point. . Based on the editing point instructed by the operator who has monitored these videos, the stream editing process similar to the editing process described in Japanese Patent Laid-Open No. 2006-67095, which is delayed from the display, that is, the first Decoding and re-encoding of the encoded stream and the second encoded stream is performed.

  As described above, when executing the conventional editing process and re-encoding described in Patent Document 1 described above, if the editing point is not determined in advance, the re-encoding range of the encoded stream serving as the editing material is minimized. In addition, the minimum range that requires decoding and re-encoding of the encoded stream used for editing could not be determined.

  Therefore, when the baseband signal is used as it is as a material for editing and encoding, the compression described with reference to FIG. 3 has to be started because the compression needs to be started back to the time axis at any editing point. In the process, it takes time to encode the edited result for the monitoring of the operator.

  Further, in order to execute the conventional editing coding described in Patent Document 1 described above, the baseband signal is compressed twice, which is disadvantageous in terms of image quality and time. It is. Further, since it is necessary to compress the baseband input signal before editing, a memory having a large recording area for temporarily holding the compressed signal is required.

  The present invention has been made in view of such a situation. For example, an editing process for connecting or overwriting a baseband input video signal to stream data encoded and recorded by MPEG LongGOP is performed. When doing so, the operator can determine the editing point while monitoring the video of the editing material, so that stream data constituting the editing result can be obtained earlier than before, and image degradation of the editing result can be reduced. It is to make.

  An information processing apparatus according to a first aspect of the present invention is an information processing apparatus that executes an editing process, an encoding unit that encodes baseband image data for each predetermined encoding range, and a first video signal. And baseband image data supplied to the encoding means based on an operation input for instructing an editing point by a user referring to the second video signal, the first video signal, the second video signal, And the first video encoded by the encoding unit based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal. Encoding after editing the encoded data in the encoding range before the editing point, not including the editing point that is switched from the first video signal to the second video signal among the signals Not to select as the stream, and a editing data control means for controlling the generation of the coded stream after editing.

  The first video signal is a baseband video signal obtained by decoding an encoded stream, and the second video signal is a signal input as a baseband video signal. it can.

  An encoding control means for controlling an encoding process by the encoding means can be further provided, and the encoding control means re-encodes an encoded stream corresponding to the first video signal. The first video signal is encoded so that the virtual buffer occupancy of the re-encoded part and the virtual buffer occupancy of the non-re-encoded part have continuity at the start and end of Can be controlled.

  The encoding control means includes the encoding range subsequent to the encoding range including the edit point that is switched from the second video signal to the first video signal in the first video signal. The encoding of the first video signal is controlled so that the virtual buffer occupation amount of the re-encoded part and the virtual buffer occupation amount of the non-re-encoded part have continuity Can do.

  An encoding range determination unit that determines a range of encoding processing by the encoding unit may be further provided, and the encoding range determination unit includes the first video from the second video signal. The virtual buffer occupancy of the re-encoded portion and the virtual buffer occupancy of the non-re-encoded portion are continuous after the encoding range next to the encoding range including the edit point to be switched to a signal. So that an end position of re-encoding of the first video signal by the encoding means is determined so that the encoding of the first video signal by the encoding means can be executed. can do.

  The encoded stream corresponding to the first video signal may be accompanied by information on zero stuff for each frame.

  Based on the information about the zero stuff attached to the encoded stream corresponding to the first video signal, the encoding control means includes the second video signal out of the first video signal. The virtual buffer occupancy of the re-encoded part by adjusting the zero stuff in the virtual buffer occupancy after the encoding range following the encoding range including the edit point switched to the first video signal It is possible to control the encoding of the first video signal so that the amount and the virtual buffer occupancy of the part that is not re-encoded have continuity.

  An information processing method according to a first aspect of the present invention is an information processing method of an information processing apparatus that executes editing processing, wherein baseband image data is encoded for each predetermined encoding range, and the first video signal and The baseband image data to be encoded is switched between the first video signal and the second video signal based on an operation input for instructing an editing point by a user referring to the second video signal, Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, the first video signal to the first video signal among the encoded first video signals. The encoded stream after editing so as not to select the encoded data in the encoding range before the editing point that does not include the editing point switched to the video signal of 2 as the encoded stream after editing. Comprising the step of controlling the generation of beam.

  A program according to a first aspect of the present invention is a program for causing a computer to execute control of editing processing, and controls processing for encoding baseband image data for each predetermined encoding range. Switching baseband image data to be encoded between the first video signal and the second video signal based on an operation input for instructing an editing point by a user who refers to the video signal and the second video signal. Of the encoded first video signal based on an operation input that commands an edit point by a user who refers to the first video signal and the second video signal. The encoded data in the encoding range before the editing point, which does not include the editing point switched from one video signal to the second video signal, as an encoded stream after editing To not-option, to execute processing comprising the step of controlling the generation of the coded stream after editing computer.

  In the first aspect of the present invention, baseband image data is encoded for each predetermined encoding range, and an operation input for instructing an edit point by a user who refers to the first video signal and the second video signal is performed. The baseband image data to be received and encoded is switched between the first video signal and the second video signal, and the encoded first video signal based on an operation input commanding an edit point by the user Among them, the encoded stream after editing is generated so that the encoded data in the encoding range before the editing point that does not include the editing point is not selected as the encoded stream after editing.

  An information processing apparatus according to a second aspect of the present invention is an information processing apparatus that executes an editing process, wherein an encoding unit that encodes baseband image data for each predetermined encoding range, and a first video signal And baseband image data supplied to the encoding means based on an operation input for instructing an editing point by a user who refers to the second video signal, and the second video signal as the first video signal. And switching means for switching the baseband image data switched by the switching means and supplied to the encoding means for a predetermined time.

  The upper limit value of the number of frames included in the predetermined encoding range can be set to N (N is a positive integer), and the delay means includes a command delay and a time required for parameter calculation. When the corresponding number of frames is α, the baseband image data supplied to the encoding means can be delayed by the processing time of N + α frames.

  The upper limit value of the number of frames included in the predetermined encoding range can be set to N (N is a positive integer), and the delay means includes a command delay and a time required for parameter calculation. When the corresponding number of frames is β, the baseband image data supplied to the encoding means can be delayed by the processing time of (N−1) + β frames.

  The upper limit value of the number of frames included in the predetermined encoding range can be N (N is a positive integer), and the lower limit value of the number of frames included in the predetermined encoding range is N ′ (N ′ Is a positive integer), and the delay means is supplied to the encoding means when β is the number of frames corresponding to one command delay and the time required for parameter calculation. The baseband image data can be delayed by the processing time of (N + N′−1) + β frame.

  The encoding means includes a virtual buffer occupation amount of the re-encoded portion and a non-re-encoded portion at a re-encoding start position and an end position of the encoded stream corresponding to the first video signal. Until the virtual buffer occupancy of the second video signal has continuity, the encoding range including the edit point that is switched from the second video signal to the first video signal, and the first video signal of a predetermined number of frames following the encoding range. And the upper limit value of the number of frames included in the predetermined encoding range can be set to N (N is a positive integer). Subsequently, the number of the predetermined frames encoded by the encoding unit can be M (M is a positive integer), and the delay unit includes baseband image data supplied to the encoding unit. (N + It can be delayed by the processing time of M + 1) frames.

  The image processing apparatus may further include second encoding means for encoding baseband image data corresponding to the first video signal supplied to the first encoding means.

  Control means for controlling the encoding process by the first encoding means can be further provided, and the first encoding means is configured to set the editing point based on the control by the control means. The predetermined encoding section can be subjected to an encoding process, and the second encoding unit includes a predetermined encoding end point of the predetermined section encoded by the first encoding unit. The control means can be notified of the virtual buffer occupancy obtained as a result of the encoding of the frame corresponding to the scheduled end point corresponding to, and the GOP phase of the encoding. Based on the notification by the encoding means, the target value of the virtual buffer occupation amount of the scheduled end point of encoding in the predetermined section is set so as to match the GOP phase of the encoding by the second encoding means. The second As the virtual buffer occupation amount obtained as a result of the encoding of the scheduled end point corresponding frame by the coding means it may be adapted to control the encoding process by the first encoding means.

  The upper limit value of the number of frames included in the predetermined encoding range can be set to N (N is a positive integer), and the control unit is based on the notification from the second encoding unit. The number of frames corresponding to the sum of the time required to calculate the parameters of the encoding process by the first encoding means and one command delay is a (a is a positive integer). The number of frames corresponding to the time taken for the control means to acquire the notification by the second encoding means after the frame corresponding to the scheduled end point is input to the second encoding means B (b is a positive integer), and the delay means delays the baseband image data supplied to the first encoding means by a processing time of (2N + 2 + a + b) frames. To let can do.

  An information processing method according to a second aspect of the present invention is an information processing method of an information processing apparatus that executes an editing process, and commands an editing point by a user who refers to a first video signal and a second video signal. Based on the operation input, the baseband image data to be encoded is switched between the first video signal and the second video signal, and the switched baseband image data is predetermined before encoding. After the time delay, the method includes a step of encoding the baseband image data for each predetermined encoding range.

  A program according to a second aspect of the present invention is a program for causing a computer to execute control of editing processing, and an operation input for instructing an editing point by a user referring to the first video signal and the second video signal. The baseband image data to be encoded is switched between the first video signal and the second video signal to control the supply of data to the encoding unit, and the switched After the baseband image data is delayed for a predetermined time before encoding, the computer is caused to execute a process including a step of controlling the encoding process so that the baseband image data is encoded for each predetermined encoding range. .

  In the second aspect of the present invention, the baseband image data to be encoded in response to an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal is stored in the first video signal. Switching between the video signal and the second video signal is performed, the switched baseband image data is delayed for a predetermined time before encoding, and the baseband image data is encoded for each predetermined encoding range.

  The editing device may be an independent device, or may be a recording device, a recording / reproducing device, or a block that performs editing processing of the information processing device.

  As described above, according to the first aspect of the present invention, editing processing can be performed. In particular, when editing processing for connecting or overwriting a baseband input video signal is performed, the video of the editing material is displayed. After the operator determines the editing point while monitoring, stream data constituting the editing result can be obtained earlier than before, and image degradation can be reduced.

  In addition, according to the second aspect of the present invention, editing processing can be performed. In particular, when editing processing for connecting or overwriting a baseband input video signal is performed, the operator monitors the video of the editing material. However, after determining the editing point, stream data constituting the editing result can be obtained earlier than before, and image degradation can be reduced.

  Embodiments of the present invention will be described below. Correspondences between constituent elements of the present invention and the embodiments described in the specification or the drawings are exemplified as follows. This description is intended to confirm that the embodiments supporting the present invention are described in the specification or the drawings. Therefore, even if there is an embodiment which is described in the specification or the drawings but is not described here as an embodiment corresponding to the constituent elements of the present invention, that is not the case. It does not mean that the form does not correspond to the constituent requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  An information processing apparatus according to a first aspect of the present invention is an information processing apparatus that executes an editing process, and encodes (for example, encoding means) that encodes baseband image data for each predetermined encoding range (for example, GOP). 19), and baseband image data supplied to the encoding means based on an operation input for instructing an edit point by a user referring to the first video signal and the second video signal, Switching means for switching between the first video signal and the second video signal (for example, switch / effect 58 in FIG. 19), and by a user who refers to the first video signal and the second video signal Of the first video signals encoded by the encoding means, the first video signal is switched to the second video signal based on an operation input for instructing an edit point. Edit data control for controlling generation of an encoded stream after editing so that encoded data in the encoding range prior to the edit point is not selected as an encoded stream after editing. Means (for example, the post-edit stream selection unit 144 in FIG. 20).

  The encoding control means (for example, the encoding control part 93 of FIG. 20) which controls the encoding process by the encoding means can be further provided, and the encoding control means is a code corresponding to the first video signal. The re-encoded virtual buffer occupancy (for example, VBV occupancy) and the non-re-encoded virtual buffer occupancy have continuity at the start and end of the re-encoding stream. Thus, the encoding of the first video signal can be controlled.

  The encoding control means includes the encoding range subsequent to the encoding range including the edit point that is switched from the second video signal to the first video signal in the first video signal. The first video signal is encoded so that the virtual buffer occupation amount (for example, VBV occupation amount) of the re-encoded portion and the virtual buffer occupation amount of the non-re-encoded portion have continuity. Can be controlled.

  The encoding unit may further include an encoding range determining unit (for example, a re-encoding range determining unit 142 in FIG. 20) that determines a range of encoding processing by the encoding unit, and the encoding range determining unit includes the second encoding range determining unit. A virtual buffer occupation amount (for example, VBV occupation amount) of a re-encoded portion after the encoding range subsequent to the encoding range including the editing point switched from the video signal to the first video signal; The first encoding by the encoding means can be performed so that the encoding means can execute the encoding of the first video signal so that the virtual buffer occupancy of the part that has not been re-encoded has continuity. The end position of the re-encoding of the video signal can be determined.

  An information processing method according to a first aspect of the present invention is an information processing method of an information processing apparatus that executes editing processing, and encodes baseband image data for each predetermined encoding range (for example, GOP) (for example, , The process of step S65 in FIG. 30), the baseband image data to be encoded based on the operation input for instructing the editing point by the user referring to the first video signal and the second video signal. Switching between the first video signal and the second video signal (for example, the process of step S69 in FIG. 31), and an operation for instructing an edit point by the user referring to the first video signal and the second video signal Based on the input, the first video signal encoded does not include the edit point that is switched from the first video signal to the second video signal, and the previous video point before the edit point. Not to select the encoded data of Goka range as encoded stream after the editing, including controlling the generation of the coded stream after editing (for example, step S67 in FIG. 30) the step.

  A program according to a first aspect of the present invention is a program for causing a computer to execute control of editing processing, and controls processing for encoding baseband image data for each predetermined encoding range (for example, GOP). (For example, the process of step S65 in FIG. 30), the baseband image data to be encoded based on the operation input commanding the edit point by the user referring to the first video signal and the second video signal, A user who controls processing to switch between the first video signal and the second video signal (for example, processing in step S69 in FIG. 31) and refers to the first video signal and the second video signal. Of the encoded first video signal, the editing is switched from the first video signal to the second video signal based on an operation input for instructing an edit point by The generation of the encoded stream after editing is controlled so as not to select the encoded data in the encoding range before the editing point that does not include the editing point as the encoded stream after editing (for example, step of FIG. 30). (S67 process) The computer is caused to execute the process including the step.

  The information processing apparatus according to the second aspect of the present invention is an information processing apparatus (for example, the editing apparatus 31 in FIG. 4 or the editing apparatus 171 in FIG. 32) that executes an editing process, and converts baseband image data to a predetermined code. The encoding means (for example, the encoder 60 in FIG. 4 or FIG. 32) for encoding for each encoding range (for example, GOP) and the editing point by the user referring to the first video signal and the second video signal are instructed. Switching means for switching baseband image data supplied to the encoding means between the first video signal and the second video signal based on an operation input (for example, the switch in FIG. 4 or FIG. 32) / Effect 58) and delay means (for example, delaying baseband image data switched by the switching means and supplied to the encoding means for a predetermined time) The frame buffer 59) of FIG. 4 or FIG.

  Second encoding means (for example, encoder 183 in FIG. 32) for encoding baseband image data corresponding to the first video signal supplied to the first encoding means is further provided. be able to.

  Control means (for example, the CPU 182 in FIG. 32) for controlling the encoding process by the first encoding means may be further provided, and the first encoding means is controlled by the control means. Based on the above, it is possible to perform encoding processing of a predetermined section (for example, a bridge clip) including the editing point, and the second encoding unit includes the first encoding unit. The control means is notified of the virtual buffer occupation amount obtained as a result of encoding the frame corresponding to the scheduled end point corresponding to the scheduled end point of the predetermined section to be encoded, and the GOP phase of encoding. The control means can be configured to match the GOP phase of the encoding by the second encoding means based on the notification from the second encoding means, and the predetermined section. The target value of the virtual buffer occupancy amount of the scheduled encoding end point is the virtual buffer occupancy amount obtained as a result of encoding the frame corresponding to the scheduled end point by the second encoding means. The encoding process by the encoding means can be controlled.

  An information processing method according to a second aspect of the present invention is an information processing method of an information processing apparatus that executes an editing process, and commands an editing point by a user who refers to a first video signal and a second video signal. Based on the operation input, baseband image data to be encoded is switched between the first video signal and the second video signal (for example, the process of step S16 in FIG. 17), and the switched After the baseband image data is delayed for a predetermined time before encoding, the baseband image data is encoded for each predetermined encoding range (for example, GOP) (for example, the process of step S18 in FIG. 17). .

  A program according to a second aspect of the present invention is a program for causing a computer to execute control of editing processing, and an operation input for instructing an editing point by a user referring to the first video signal and the second video signal. The baseband image data to be encoded is switched to the first video signal and the second video signal to control the data supply to the encoding unit (for example, FIG. 17). Step S16), after the switched baseband image data is delayed for a predetermined time before encoding, the baseband image data is encoded for each predetermined encoding range (for example, GOP). Then, the computer is caused to execute a process including a step of controlling the encoding process (for example, the process of step S18 in FIG. 17).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  With reference to FIG. 4, the structure of the editing apparatus 31 which is the 1st Embodiment of this invention is demonstrated.

  A CPU (Central Processing Unit) 41 is connected to the North Bridge 42, and controls processing such as reading of data recorded on an HDD (Hard disk Drive) 46 or a recording medium 48, and editing executed by the CPU 52, for example. Generate and output control signals and commands for controlling processing. The north bridge 42 is connected to a PCI bus (Peripheral Component Interconnect / Interface) 44 and receives supply of data recorded in the HDD 46 or the recording medium 48 via the south bridge 45 based on the control of the CPU 41, for example. Then, the data is supplied to the memory 50, the decoder 54, or the decoder 55 via the PCI bus 44 and the PCI bridge 49. The north bridge 42 is also connected to the memory 43, and exchanges data necessary for the processing of the CPU 41.

  The memory 43 stores data necessary for processing executed by the CPU 41. The south bridge 45 controls writing and reading of data in the HDD 46. In the HDD 46, compressed video data (hereinafter, referred to as base data), which is a target of compression-encoded insert editing recorded on the recording medium 48, is inserted at a predetermined position. (Also referred to as overwrite data as appropriate) is recorded.

  In addition, a drive 47 is connected to the south bridge 45, and the drive 47 reads background data from the recording medium 48, and records background data and overwrite data supplied from the south bridge 45 on the recording medium 48. To do. The recording medium 48 is made of, for example, a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, and records background data to be subjected to insert editing.

  The PCI bridge 49 controls the supply of compressed video data to the decoder 54 and the decoder 55, the acquisition of compressed video data after editing supplied from the encoder 60, and the writing and reading of data in the memory 50. Controls the data transmission / reception of the PCI bus 44 and the control bus 51. Under the control of the PCI bridge 49, the memory 50 stores an encoded stream of editing material read from the HDD 46 or the recording medium 48 and compressed video data after editing supplied from the encoder 60.

  In accordance with control signals and commands supplied from the CPU 41 via the north bridge 42, PCI bus 44, PCI bridge 49, and control bus 51, the CPU 52 is connected to the PCI bridge 49, decoders 54 to 56, switch 57, switch / The processing executed by the effect 58, the encoder 60, and the switch 62 is controlled. The memory 53 stores data necessary for the processing of the CPU 52.

  Based on the control of the CPU 52, the decoders 54 to 56 decode the supplied compressed video data and output an uncompressed video signal (baseband image data). The decoders 54 to 56 may be provided as independent devices that are not included in the editing device 31. For example, when the decoder 56 is provided as an independent device, the decoder 56 can receive, decode, and output compressed video data that has been edited and generated by processing to be described later. . The output of the decoder 54 is output to a first monitor (not shown) and displayed.

  The switch 57 supplies either the baseband image data supplied from the decoder 55 or the baseband image data input via the input terminal 61 to the switch / effect based on the control of the CPU 52. The data is output and displayed on a second monitor (not shown) of the switch 57.

  The switch / effect 58 receives an uncompressed video signal from the decoder 55 or the input terminal 61 via the decoder 54 or the switch 57 based on the control of the CPU 52, and is supplied based on the control of the CPU 52. Switch the output of uncompressed video signals. That is, the switch / effect 58 combines the supplied non-compressed video signal with a predetermined frame, applies an effect to a predetermined range as necessary, and supplies it to a frame buffer 59.

  The frame buffer 59 holds the supplied baseband image data for a predetermined period and supplies it to the encoder 60. The buffering period by the frame buffer 59 will be described later.

  The encoder 60 encodes the supplied uncompressed video signal based on the control of the CPU 52. That is, the encoder 60 encodes an uncompressed video signal to generate an edited encoded stream.

  Based on the control of the CPU 52, the switch 62 outputs either the baseband image signal output from the switch / effect 58 or the baseband image signal decoded by the decoder 56 to an external third monitor (not shown). Output and display.

  An SDI signal that is baseband image data is input from the input terminal 61 and supplied to the switch / effect 58 via the switch 57.

  As described above, in the editing apparatus 31, the frame buffer 59 is inserted before the input of the encoder 60. On the other hand, the output of the decoder 54 output to the first monitor and the input of the switch 57 output to the second monitor are data before delay by the frame buffer 59. That is, the input to the encoder 60 is delayed for a certain time with respect to the video of the editing material checked by the operator using the first monitor and the second monitor.

  Referring to FIGS. 5 to 15, when editing is performed in editing device 31, the delay time of the input signal to encoder 60 generated by buffering by frame buffer 59, and the operation of each part of editing device 31 Will be described.

  As shown in FIG. 5, the encoded stream that is the editing material is input to the decoder 54 and decoded, and the decoder output is supplied to the encoder 60. When the IN point is commanded, encoding is executed so that the same portion of the original encoded stream and VBVoccupancy are continuous at the head position of the GOP including the IN point. The input to the encoder 60 is switched to the SDI input, and the SDI signal is continuously encoded.

  When the OUT point is commanded, the decoding of the first encoded stream is started at the head of the GOP including the OUT point, and the input to the encoder is the first encoded stream from the SDI signal at the editing point. To the decoder output. And, similar to the re-encoding process in the editing process described in JP-A-2006-67095 described above, the GOP including the editing point and, if necessary, the subsequent encoding process up to the VBVoccupancy target point after a predetermined frame, The generated code amount is adjusted so that encoding is performed so that the VBVoccupancy target point of the original encoded stream and the VBVoccupancy target value determined to be continuous are executed.

  An encoder that is generated by buffering by the frame buffer 59 in order to execute an encoding with correct parameters including the VBVoccupancy target value from the GOP break before the operator determines an editing point while checking the monitor. The delay time of the input signal to 60 may be sufficient to start encoding from the first frame of the GOP after determining the setting parameter after determining the editing point.

  With reference to FIG. 6, the buffer capacity of the frame buffer 59 required at the edit point in the assemble edit and the IN point in the insert edit will be described.

  If the maximum GOP length is N and the IN point (or edit point, the same applies below) is the beginning of the GOP, the first frame of that GOP is the encoding start point, so the IN point is any position within the GOP. Is set to (N-1) [frame], the maximum number of frames from the beginning of the GOP including the IN point to the IN point. In the case of openGOP, the actual encoding is from the beginning of the GOP including the IN point, but for reference picture input, the signal input to the encoder starts from the reference picture, so one frame of reference picture input is included in the encoding. Time is required. Also, since one command delay and time are required for parameter calculation, if the number of frames corresponding to this time is α [frame], the buffer capacity of the frame buffer 59 is (N−1) + 1 + α = N + α [ If it is more than the frame], after the editing point is determined, the setting parameters are determined, and the connected baseband image data delayed by a sufficient time to start encoding from the GOP break is supplied to the encoder 60. The constraint condition of encoding in the encoder 60 is that the VBVoccupancy at the encoding start point is made to be continuous between a portion where re-encoding is not performed and a portion where re-encoding is performed.

  Next, the buffer capacity of the frame buffer 59 required at the OUT point in insert editing will be described with reference to FIG.

  When the maximum GOP length is N, the maximum number of frames from the beginning of the GOP including the OUT point to the IN point is at most (N-1) [frames] regardless of the position of the OUT point in the GOP. It becomes. Also, since one command delay and time are required for parameter calculation, if the number of frames corresponding to this time is β [frame], the buffer capacity of the frame buffer 59 is (N−1) + β [frame]. By doing so, after the edit point is determined, the setting parameters are determined, and the connected baseband image data delayed by a sufficient time to start encoding from the GOP break is supplied to the encoder 60.

  The encoding restriction condition in the encoder 60 is that the last frame of the GOP including the OUT point or the I picture of the next GOP is set as the end point of the re-encoding range of the encoded stream. Encoding is performed by setting a VBVoccupancy target value so that VBVoccupancy at a point can be continued between a portion where re-encoding is not performed and a portion where re-encoding is performed.

  When the OUT point overlaps the GOP break in the encoded stream that is the base in the insert process, encoding is performed using the VBVoccupancy at the OUT point as the VBVoccupancy target value. If the OUT point overlaps with the GOP break when the baseband input data corresponding to the insertion part in the insert process is encoded, the interval from the OUT point to the next GOP break is defined as 1 GOP, and at the end of that GOP Encoding is performed so that VBVoccupancy is continuous.

  In addition, at the edit point in assemble editing and IN point, in the encoding process of baseband input data that is overwrite data or connected data, GOP is arbitrarily set and encoded so that it is less than the maximum GOP length (N). However, in a GOP including an OUT point (when the OUT point is a GOP break, the next GOP), the GOP is set according to the GOP break in the original encoded stream when it is not re-encoded. Encoding is required.

  The number of frames that make up the GOP including the OUT point must not exceed the number of frames set for the maximum number of frames in the GOP. I want to avoid it.

  Therefore, when the GOP including the OUT point in the encoded result of the inserted portion and the GOP after the OUT point in the underlying encoded stream exceed the maximum number of GOPs N, as shown in FIG. The portion is encoded by the encoder 60 so as to be divided into two GOPs.

  If the number of frames included in the GOP including the OUT point is always less than or equal to N by such processing, the operator can display the value on the monitor by using the value described above as the buffer capacity of the frame buffer 59. When editing point (IN point or OUT point) is commanded at a desired position while checking the editing material to be edited, the editing process can be performed quickly without degrading the image quality compared to the past. It becomes possible.

  In addition, when the minimum number of frames included in 1 GOP, which is necessary to prevent the encoding efficiency from being reduced, is N ′, if the number of GOP frames including the OUT point is less than N ′, either When the number of frames included in the combined GOP is greater than or equal to N, the GOP is divided again so that the number of frames included in the GOP does not fall below N ′. The number of frames included in the GOP is set within a range of N ′ to N.

  For example, when the range of the GOP including the OUT point is extended to the temporally earlier portion, that is, the encoded stream side which is the background in the insert editing, the buffer capacity of the frame buffer 59 is set to (N− 1) If it is assumed that + β [frame], the baseband image data after connection delayed by a sufficient time to start encoding from the GOP break is determined after the editing point is determined, and supplied to the encoder 60.

  On the other hand, when the GOP range including the OUT point is expanded to the previous part in time, that is, the baseband data side that is the overwrite data in the insert editing, the buffer capacity of the frame buffer 59 is set as described above. , (N−1) + β [frame], there is a risk that the delay time will be insufficient.

  While baseband data is only encoded for the first time in the editing process, the underlying encoded stream is encoded at least a second time, so to prevent image quality degradation, set the OUT point. It is preferable to extend the range of GOPs included to the previous part in time, that is, to the baseband data side that is overwrite data in insert editing.

  If the expansion of the GOP range including the OUT point to the previous part in time, that is, the baseband data side that is the overwrite data in the insert editing, the buffer capacity of the frame buffer 59 is (N + N′−1). If it is set to + β [frame] or more, as shown in the upper part of FIG. 11, after setting the editing point, the setting parameter is determined, and the connected baseband image data delayed by a sufficient time to start encoding from the GOP break. Is supplied to the encoder 60.

  If the buffer capacity of the frame buffer 59 is set to (N + N′−1) + β [frame] or more, as shown in the lower part of FIG. 11, even when the OUT point and the GOP break overlap, sufficient The connected baseband image data delayed by time is supplied to the encoder 60, and the encoding process is performed so that the VBVoccupancy at the end point can be continued between the portion that does not perform re-encoding and the portion that executes re-encoding. A sufficient number of frames can be secured.

  Also, for example, as shown in FIG. 12, when both the IN point and the OUT point exist in 1 GOP of the encoded stream which is the base in the insert editing, the buffer capacity of the frame buffer 59 is (N + N′−1). If it is + β [frame] or more, since the encoding of the GOP has not started yet when the OUT point is determined, the editing process can be performed without any problem.

  Further, for example, as shown in FIG. 13, even if the number of frames included in the GOP including the OUT point in the encoded stream that is the background in the insert editing is the minimum value N ′, the editing process is performed without any problem. It becomes possible.

  That is, assuming that the maximum GOP length of the stream to be processed is N [frames] and the minimum GOP length is N ′ [frames], the frame processing time corresponding to the time required for (command delay + parameter calculation) is Assuming that α [frame] and β [frame] at the OUT point have the same value, if the buffer capacity of the frame buffer 59 is (N + N′−1 + β) [frame], the setting is made after the edit point is determined. The connected baseband image data delayed by a sufficient time to determine the parameters and start encoding from the GOP break is supplied to the encoder 60.

  Note that if the frame processing time corresponding to the time taken for (command delay + parameter calculation) is not equal to α [frame] at the IN point and β [frame] at the OUT point, the frame buffer The buffer capacity 59 may be set to the larger one of (N + N′−1 + β) [frame] and (N−1 + α) [frame].

  In order to make VBVoccupancy at the end point of the re-encoding section continuous between the part that does not execute re-encoding and the part that executes re-encoding, for example, the GOP including the editing point (OUT point) (or the GOP and the next If the occupancy is smaller than the target VBV occupancy at the end of encoding (up to the I picture), the VBV occupancy cannot be made continuous by zero stuff. Re-encoding may be continued by the generated code adjustment method.

  In addition, in order to make the VBVoccupancy at the end point of the re-encoding section continuous between the part where the re-encoding is not performed and the part where the re-encoding is performed, the VB Voccupancy at the end point of the re-encoding period is The continuity of VBVoccupancy may be ensured by using a 2-path method in which encoding is repeated until the encoding is continued. The 2-path method is a method in which, when VBVoccupancy does not match as a result of encoding, a code allocation is newly set by subtracting the deviation from the code allocation amount, and encoding is repeated until VBVoccupancy continues.

  When performing the 2-path method, the data after the OUT point, that is, the encoded stream that is the base in the insert process may be read from the HDD 46 each time. Is buffered, there is no need to repeat data reading, which is preferable.

  Specifically, as shown in FIG. 15, the minimum number of frames to be encoded for adjusting the VBV occupation amount is the sum of the number of frames for 1 GOP and the number of frames up to the I picture of the next GOP. It is. Therefore, if the maximum number from the GOP head to the I picture is M, the maximum number of 1GOP is N, and the buffer capacity of the frame buffer 59 is (N + M + 1) considering one frame of the forward reference picture required at the time of encoding. With “frame”, the 2-path method can be executed using the baseband image signal stored in the frame buffer 59.

  Therefore, when performing the 2-path method, it is preferable that the buffer capacity of the frame buffer 59 is set to the larger one of (N + N′−1 + β) [frame] and (N + M + 1) [frame].

  FIG. 16 is a functional block diagram for explaining the functions of the CPU 41 and the CPU 52 of the editing apparatus 31.

  The CPU 41 has functions of a parameter acquisition unit 81, a user input acquisition unit 82, an IN point / OUT point determination unit 83, a re-encode range determination unit 84, and an edit processing control unit 85. The CPU 52 performs a decoding process. Functions of the unit 91, # 1 switch control unit 92, encoding processing unit 93, and # 2 switch control unit 94.

  The parameter acquisition unit 81 includes various parameters necessary for processing such as parameters predetermined in the editing device 31 such as the buffer capacity of the frame buffer 59, GOP phase and VBV occupation amount related to the encoded stream or baseband image data to be edited. Get parameters.

  The user input acquisition unit 82 acquires commands for IN points (including editing points) and OUT points supplied from an operation input unit (not shown).

  The IN point / OUT point determination unit 83 uses the user operation input supplied from the user input acquisition unit 82 and the various parameters acquired by the parameter acquisition unit to edit the IN point (including the edit point) and OUT. A point is determined and supplied to the edit processing control unit 85. Here, the switch of the switch / effect 58 is switched substantially in real time at the timing of the IN point and OUT point commands input by the operator who confirms the video of the editing material on the first monitor and the second monitor. It is assumed that data output to the frame buffer 59 is switched.

  The re-encoding range determination unit 84 includes the user operation input supplied from the user input acquisition unit 82, the various parameters acquired by the parameter acquisition unit, the IN point determined by the IN point / OUT point determination unit 83, Based on the OUT point, the re-encoding range of the encoded stream that is the base in the insert processing is determined and supplied to the editing processing control unit 85.

  The edit processing control unit 85 determines the IN point and the OUT point determined by the IN point / OUT point determination unit 83, and the re-encoding range of the encoded stream that is the base determined by the re-encoding range determination unit 84. Based on the decoder 54 to the decoder 56, the switch 57, the switch / effect 58, the encoder 60, and the command for controlling the operation of the switch 62, the north bridge 42, the PCI bus 44, the PCI bridge 49, and the like are generated. The generated command is supplied to the CPU 52 via the control bus 51.

  The decode processing unit 91 controls the operations of the decoders 54 to 56 based on the command supplied from the edit processing control unit 85.

  The # 1 switch control unit 92 controls the operation of the switch / effect 58 to switch the data to be output to the stream buffer 59 at the editing point and connect the data.

  The encoding processing unit 93 controls the operation of the encoder 60 based on the command supplied from the editing processing control unit 85.

  The # 2 switch control unit 94 controls the switch 57 to control, for example, the switching of overwriting data supplied to the switch / effect 58.

  Next, editing processing 1 executed by the editing device 31 will be described with reference to the flowcharts of FIGS. 17 and 18.

  In step S <b> 11, the CPU 41 reads a base encoded stream recorded on a hard disk drive (HDD) 46 or a recording medium 48 and supplies the encoded stream to the PCI bridge 49 via the north bridge 42 and the PCI bus 44. The CPU 52 temporarily stores the supplied encoded stream of the background in the memory 50 as necessary, and then supplies it to the decoder 54. Based on the control of the decoding control unit 91, the decoder 54 starts decoding the supplied background encoded stream, and supplies the baseband signal generated by decoding to the switch / effect 58.

  In step S12, the monitor 1 and the monitor 2 start displaying the editing material before the delay, and the monitor 3 starts displaying the output of the switch / effect 58, that is, the editing result before the delay. The operator observes the video displayed on the monitor 1 and the monitor 2, and instructs the timing to switch the signal from an operation input unit (not shown).

  In step S <b> 13, the parameter acquisition unit 81 of the CPU 41 acquires GOP phase information regarding the base encoded stream and supplies the GOP phase information to the IN point / OUT point determination unit 83 and the re-encode range determination unit 84. Thereby, the CPU 41 can detect a GOP break in the underlying encoded stream. In addition, since the CPU 41 recognizes the buffer capacity of the frame buffer 59, it is possible to control the re-encoding start timing by the encoder 60.

  In step S <b> 14, the parameter acquisition unit 81 acquires the VBV occupation amount at the GOP break regarding the base encoded stream, and supplies the VBV occupation amount to the IN point / OUT point determination unit 83 and the re-encode range determination unit 84. Thereby, for example, using the technique described in the above-mentioned Japanese Patent Application Laid-Open No. 2006-67095 and other known techniques, VBVoccupancy can be made continuous between a part that does not perform re-encoding and a part that executes re-encoding. It becomes possible.

  In step S15, the user input acquisition unit 82 performs operation input so as to switch the input signal to the frame buffer 59 and the encoder 60 from the baseband signal corresponding to the underlying encoded stream to the baseband signal supplied from the input terminal 61. It is determined whether or not it has been received.

  If it is determined in step S15 that an operation input for switching input signals to the frame buffer 59 and the encoder 60 has not been received, the process in step S15 is repeated until it is determined that the operation input has been received.

  If it is determined in step S15 that an operation input for switching input signals to the frame buffer 59 and the encoder 60 has been received, in step S16, the IN point / OUT point determining unit 83 determines an IN point in editing, and editing processing is performed. This is supplied to the controller 85. The edit processing control unit 85 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 52 and supplies the control signal to the CPU 52. The # 1 switch control unit 92 of the CPU 52 controls the operation of the switch / effect 58 to switch the data to be output at the editing point, and the input signals to the frame buffer 59 and the encoder 60 correspond to the underlying encoded stream. The baseband signal is switched to the baseband signal supplied from the input terminal 61, that is, the baseband signal corresponding to the underlying encoded stream and the baseband signal supplied from the input terminal 61 are connected. Since the supplied baseband signal is buffered in the frame buffer 59, the input to the encoder 60 is delayed by the buffer capacity of the frame buffer 59.

  In step S17, the re-encoding range determination unit 84 detects the setting position of the IN point determined by the IN point / OUT point determination unit 83, and determines the timing for starting encoding by the encoder 60 for the GOP including the IN point. Set.

  In step S18, the edit processing control unit 85 outputs a control signal for controlling the encoding by the encoder 60 from the first frame of the GOP including the IN point of the background encoded stream buffered by the frame buffer 59 to the CPU 52. Is supplied to the encoding control unit 93. Based on the control signal supplied from the edit processing control unit 85, the encoding control unit 93 encodes the encoder 60 from the first frame of the GOP including the IN point of the base encoded stream buffered by the frame buffer 59. Controls encoding by. The encoding control unit 93 can basically cause the encoder 60 to perform encoding with an arbitrary GOP length until the GOP including the OUT point. For example, the encoding control unit 93 may perform encoding with 1 GOP as the maximum GOP length N so that the encoding efficiency is as high as possible.

  In step S19, the CPU 41 starts obtaining the encoding result supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42, and supplies the encoded result to the memory 43 for storage.

  In step S <b> 20, the user input acquisition unit 82 converts the input signal to the frame buffer 59 and the encoder 60 from the baseband signal supplied from the input terminal 61 to the base encoded stream output from the decoder 54. It is determined whether or not an operation input has been received so as to switch to a band signal.

  If it is determined in step S20 that an operation input for switching input signals to the frame buffer 59 and the encoder 60 has not been received, the process of step S20 is repeated until it is determined that an operation input for switching input signals has been received.

  If it is determined in step S20 that an operation input for switching input signals to the frame buffer 59 and the encoder 60 has been received, in step S21, the IN point / OUT point determining unit 83 determines an OUT point in editing, and editing processing is performed. This is supplied to the controller 85. The edit processing control unit 85 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 52 and supplies the control signal to the CPU 52. The # 1 switch control unit 92 of the CPU 52 controls the operation of the switch / effect 58, switches the data to be output at the editing point, and supplies the input signals to the frame buffer 59 and the encoder 60 from the input terminal 61. The band signal is switched to the baseband signal corresponding to the underlying encoded stream. That is, the edit processing control unit 85 connects the baseband signal supplied from the input terminal 61 and the baseband signal corresponding to the base encoded stream. The frame buffer 59 buffers the connected baseband signal and the baseband signal corresponding to the base encoded stream.

  In step S22, the re-encoding range determination unit 84 controls the encoding process so that the VBV occupancy amounts at the stream connection positions at the encoding end point coincide with each other, determines the re-encoding end position, and determines the determined re-encoding range. And supplied to the edit processing control unit 85. The editing process control unit 85 supplies a control signal for controlling encoding by the encoder 60 to the encoding control unit 93 of the CPU 52. Based on the control signal supplied from the edit processing control unit 85, the encoding control unit 93 encodes the encoder from the first frame of the GOP including the OUT point of the underlying encoded stream that has been buffered by the frame buffer 59. 60 controls the encoding.

  In step S <b> 23, the re-encode range determination unit 84 determines whether or not the encoding by the encoder 60 has been correctly completed. If it is determined in step S23 that the encoding by the encoder 60 has not been correctly completed, that is, the VBV occupancy at the stream connection position at the encoding end point does not match, the process returns to step S22, and thereafter The process is repeated.

  If it is determined in step S23 that the encoding by the encoder 60 has been correctly completed, in step S24, the CPU 41 is supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42 and stored in the memory 43. The encoded stream of the edited part is supplied to the drive 47 via the south bridge 45 and recorded in a predetermined recording area of the attached recording medium 48, thereby encoding the part that has not been edited. The process ends after connecting the stream.

  Note that if the recording speed and playback speed of the recording medium 48 by the drive 47 are sufficiently higher than the speed of the code that is currently recording and playing back, the baseband image data corresponding to the underlying encoded stream is played back. However, it is possible to record newly created code data after editing on the recording medium 48.

  By such processing, the operator can determine the editing point while monitoring the video of the editing material, and can obtain the editing result faster than before, and can reduce image degradation.

  In order to make the VBVoccupancy at the end point continuous between the part that does not execute re-encoding and the part that executes re-encoding, for example, GOP including the edit point (OUT point) (or the GOP and the next I picture) ) When the occupancy becomes smaller than the target VBV occupancy at the end of encoding, VBV occupancy cannot be made continuous by zero stuff, so the next GOP is also subject to encoding and any generated code adjustment Re-encoding may be continued by the method.

  Also, the continuity of VBVoccupancy is ensured by using the 2-path method that repeats encoding in the same range until VBVoccupancy at the end point is continuous between the part that does not perform re-encoding and the part that performs re-encoding. You may do it.

  Next, with reference to FIG. 19, the structure of the editing apparatus 101 which is the 2nd Embodiment of this invention is demonstrated.

  Note that portions corresponding to those in the editing apparatus 31 in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  That is, the editing apparatus 101 of FIG. 19 is basically the same as the editing apparatus 31 of FIG. 4 except that the CPU 121 is provided instead of the CPU 41, the CPU 122 is provided instead of the CPU 52, and the frame buffer 59 is omitted. It has the same configuration.

  In the editing apparatus 101, the decoding and encoding of the underlying encoded stream is started for each GOP unit before the operation input designating the editing point (IN point / OUT point) is acquired. Has been made. If there is no edit point (IN point / OUT point) in the encoded GOP, the encoded result is discarded.

  FIG. 20 is a functional block diagram for explaining the functions of the CPU 121 and the CPU 122 of the editing apparatus 101.

  Note that portions corresponding to those in the editing apparatus 31 in FIG. 16 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  That is, the CPU 121 of the editing apparatus 101 replaces the IN point / OUT point determination unit 83, the re-encode range determination unit 84, and the edit processing control unit 85 with an IN point / OUT point determination unit 141, a re-encode range determination unit. 142, the editing process control unit 143, and the post-editing stream selection unit 144. The CPU 122 of the editing apparatus 101 has basically the same function as the CPU 52 of the editing apparatus 31.

  The IN point / OUT point determination unit 141 includes the IN point (including the editing point) and OUT in editing based on the user operation input supplied from the user input acquisition unit 82 and the various parameters acquired by the parameter acquisition unit. The point is determined and supplied to the editing process control unit 143 and the edited stream selection unit 144. Here again, the switch of the switch / effect 58 is switched substantially in real time at the timing of the IN point and OUT point commands input by the operator who confirms the video of the editing material on the first monitor and the second monitor. It is assumed that the data output to the encoder 60 is switched.

  The re-encoding range determination unit 142 includes a user operation input supplied from the user input acquisition unit 82, various parameters acquired by the parameter acquisition unit 81, and an IN point determined by the IN point / OUT point determination unit 141. And a re-encoding range as a range for selecting a re-encoding result as an editing result among encoding results of an encoded stream that is a base in the insert processing based on the OUT point, an editing processing control unit 143, and The stream is supplied to the post-edit stream selection unit 144.

  The edit processing control unit 143 includes the IN point and the OUT point determined by the IN point / OUT point determination unit 141, and the encoding result of the underlying encoded stream determined by the re-encoding range determination unit 142. Commands for controlling the operations of the decoder 54 to the decoder 56, the switch 57, the switch / effect 58, the encoder 60, and the switch 62 based on the re-encoding range as a range for selecting the re-encoding result as the editing result. And the generated command is supplied to the CPU 52 via the north bridge 42, the PCI bus 44, the PCI bridge 49, and the control bus 51.

  The post-edit stream selection unit 144 includes the IN point and OUT point determined by the IN point / OUT point determination unit 141, and the encoding result of the encoded stream that is the base determined by the re-encoding range determination unit 142. Based on the range in which the re-encoding result is selected as the editing result, acquisition of the encoding result supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42 is started and stored in the memory 43. Of the re-encoded stream, a part to be discarded and a part to be recorded without being discarded and recorded in a predetermined recording area of the recording medium 48 attached to the drive 47 are selected.

  Specifically, the edit processing control unit 143 controls the decoding of the background encoded stream at the edit point of the assemble edit, as shown in FIG. 21, and until the IN point is determined, Control the encoding. If there is no IN point in the GOP, the post-edit stream selection unit 144 discards the encoded data of the GOP that has been encoded and saved in the memory 43.

  The result of re-encoding the baseband signal obtained by decoding the underlying encoded stream is not necessarily the same data as the original. Therefore, until the IN point is determined, the transition of VBVoccupancy at the GOP break must be controlled to have continuity at the GOP break as shown in FIG.

  For example, when encoding by the encoder 60 is performed with code amount distribution by TM5, the total code amount given to the next GOP is G = bit rate × number of frames of the GOP N / picture rate, and R is a GOP break. When the value is less than the maximum value of VBVbuffer (negative number), it is expressed as R + G. The details are disclosed in, for example, ISO / IEC JTC1 / SC29 / WG11 / N0400 Test Model 5 10 RATE CONTROL AND QUANTIZATION CONTROL.

  That is, in the code amount allocation by TM5, as shown in FIG. 22, having continuity of VBVoccupancy at the GOP breaks, the total code amount of the encoding target GOP is calculated using the R value by the original stream. This corresponds to calculating the code distribution.

  Further, regarding the IN point of insert editing, the same processing as in the above-described assembly editing is executed.

  Then, with respect to the OUT point of the insert editing, as shown in FIG. 23, the edit processing control unit 85 ends the GOP from the GOP break immediately after the OUT point, that is, from the beginning of the GOP next to the GOP including the OUT point. Perform VBVoccupancy fitting encoding for the VBVoccupancy target value set at the point.

  In this case as well, as in the editing apparatus 31, the number of GOP frames including the OUT point (the number of frames in the range indicated by k in FIG. 23) must not exceed the maximum GOP length N.

  Then, in the editing apparatus 101, unlike in the editing apparatus 31, the GOP phase in the case of encoding the inserted SDI input (baseband image data) is converted into the background encoded stream as shown in FIG. Same as

  Based on the GOP phase and GOP length of the background encoded stream acquired by the parameter acquisition unit 81, the edit processing control unit 143 sets the GOP phase when encoding the SDI input to be the same as that of the background encoded stream. Thus, a control signal is supplied to the encoding control unit 93. As a result, for any OUT point, the length of the GOP including the OUT point does not exceed the maximum GOP length N defined in the underlying encoded stream.

  When the user input acquisition unit 82 acquires an OUT point command supplied from an operation input unit (not shown), the editing processing control unit 85 reads the GOP of the background encoded stream acquired by the parameter acquisition unit 81. Based on the VBVoccupancy at the break, a control signal is supplied to the encoding control unit 93 so as to adjust the VBVoccupancy toward the VBVoccupancy target point.

  The end point of the re-encoding range determined by the OUT point and the adjustment of VBVoccupancy will be described with reference to FIG.

  If the OUT point is determined and the VBVoccupancy target value setting from the next GOP break α is in time, the edit processing control unit 143 performs rate control with the VBVoccupancy of the next GOP break β as the target value to perform encoding. If βB can be controlled so as to have continuity in β (there may be continuity using zero stuff), a control signal is supplied to the encoding control unit 93 so as to end the encoding.

  On the other hand, if VBVoccupancy cannot be adjusted in β, or if the value is far from the original VBVoccupancy at α and rate control is performed such that it is adjusted in β, the image quality may deteriorate too much. If determined to be clear, the editing process control unit 143 supplies a control signal to the encoding control unit 93 so as to perform encoding with the VBVoccupancy at the GOP break after the next γ as a target value.

  At this time, the edit processing control unit 143 may start the VBVoccupancy target value setting at the next γ and start the encoding process based on the setting without waiting for the result of the VBVoccupancy adjustment at β. good. At this time, if VBVoccupancy cannot be controlled to have continuity in β, the processing result of the encoding process based on the VBVoccupancy target value setting in the next γ shall be used, and VBVoccupancy will have continuity in β. If the control can be performed, the encoding result from β to γ may be discarded.

  For example, the technique disclosed in Japanese Patent Application Laid-Open No. 2006-67095 described above may be used for setting the target value of VBVoccupancy and controlling the encoding so as to match the target value. It is good or other methods may be used. And depending on the setting of the target value of VBVoccupancy and the control to execute encoding so as to match the target value, the setting point of the target value of VBVoccupancy, that is, the end point of the re-encoded range can be changed. It doesn't matter.

  Next, processing after the OUT point is determined will be described.

  For example, as shown in FIG. 25, when the OUT point is determined in the GOP having a break as α and the OUT point is at a position different from α, the stream of the stream being encoded is displayed as shown in FIG. When VBVoccupancy is smaller than VBVoccupancy in the I picture immediately after α of the original stream, VBVoccupancy can be adjusted by zero stuff to the final B picture of the GOP before α, so encoding ends there Is also possible.

  As shown in the lower part of FIG. 26, when the OUT point is a GOP cut α, the immediately preceding P picture (P14 in FIG. 26) is the next B picture (B and B1 in FIG. 26). Since this is an irrelevant picture, this P picture is not a forward reference picture of the immediately following B picture. Therefore, it is necessary to continue re-encoding in the future.

  When the OUT point is not a GOP cut α and is any point in the middle of the GOP that is temporally prior to the point indicated by α in the figure, as shown in FIG. 27A, the forward reference images of B0 and B1 It is more advantageous in SNR than P14 is re-encoded and B0 and B1 are connected without being re-encoded, and P14, B0 and B1 are re-encoded and the backward reference picture I2 is connected without being re-encoded. Therefore, it is preferable that B0 and B1 are to be re-encoded (see, for example, JP-A-2006-67095).

  On the other hand, as shown in the lower part of FIG. 26, when the OUT point is a GOP cut α, considering the SNR degradation due to one extra encoding on B0 and B1 immediately after α. As shown in FIG. 27B, it is more likely that the end of encoding at a GOP break will lead to prevention of image quality degradation.

  Further, as described above, in the GOP break α including the OUT point, if the VBVoccupancy in the B picture immediately before the GOP break is larger than the VBVoccupancy of the I picture of the next GOP in the state of adding the increment of VBVoccupancy after 1 picture_rate Since it is possible to make VBVoccupancy continuous with zero stuff related to the B picture, it is possible to end the encoding at the GOP break α including the OUT point. The transition of VBVoccupancy at that time is shown in FIG.

  On the other hand, as shown in B of FIG. 28, even if the VBVoccupancy of the I picture is larger, as shown in C of FIG. 28, the zero stuff included in the GOP after α is trimmed. Thus, if the previous VBVoccupancy transition does not cause VBV buffer underflow in the range indicated by γ in the figure, the encoding can be terminated at the GOP break α including the OUT point.

  In this case, since the VBV_delay value is changed, it is necessary to calculate a new VBV_delay value and rewrite the picture_header content.

  Also, in order to prevent VBV Buffer underflow by deleting zero stuff included in GOPs after α, it is necessary to know the amount of zero stuff for each GOP in advance. Therefore, in order to execute such processing, it is necessary to separately record zero stuff for each GOP as management data.

  In the case of stream data encoded with LongGOP, the amount of data per frame is not constant, so for example when you want to start playback by specifying a frame, be sure to specify the frame number and its ES data recording position. Therefore, it is preferable to manage the table by adding information about the amount of zero stuff to the table.

  For example, when Professional Disc (trademark) is used as the recording medium 48, since information called Picture Pointer is recorded and managed on the recording medium 48 as management data, it is conventionally included in Picture Pointer as shown in FIG. It is possible to add the zero stuff amount of the frame to the information (the part indicated by X in the figure) (the part indicated by Y in the figure) and use it as management data.

  Since the zero stuff amount information is output from the encoder only during encoding, the editing apparatus 101 executes editing processing on the recording medium 48 on which data that has already been encoded is recorded. In this case, the CPU 121 analyzes the encoded stream data recorded on the recording medium 48 and acquires information on the amount of zero stuff for each frame.

  As described above, in the editing apparatus 101, when the inserted baseband signal is encoded, the GOP phase is matched with the base encoded stream. As a result, the code in the range for encoding to match VBVoccupancy has the same picture type as the underlying encoded stream, which is also effective for SNR.

  Next, editing processing 2 executed by the editing apparatus 101 will be described with reference to the flowcharts of FIGS. 30 and 31.

  In step S <b> 61, the CPU 121 reads a base encoded stream recorded on a hard disk drive (HDD) 46 or a recording medium 48, and supplies it to the PCI bridge 49 via the north bridge 42 and the PCI bus 44. The CPU 122 temporarily stores the supplied base encoded stream in the memory 50 as necessary, and then supplies it to the decoder 54. Based on the control of the decoding control unit 91, the decoder 54 starts decoding the supplied background encoded stream, and supplies the baseband signal generated by decoding to the switch / effect 58.

  In step S62, the monitor 1 and the monitor 2 start displaying the editing material, and the monitor 3 starts displaying the output of the switch / effect 58, that is, the editing result. The operator observes the video displayed on the monitor 1 and the monitor 2, and instructs the timing to switch the signal from an operation input unit (not shown).

  In step S <b> 63, the parameter acquisition unit 81 of the CPU 121 acquires GOP phase information regarding the background encoded stream and supplies the GOP phase information to the IN point / OUT point determination unit 141 and the re-encode range determination unit 142. As a result, the CPU 121 can detect a GOP break in the underlying encoded stream.

  In step S 64, the parameter acquisition unit 81 acquires the VBV occupation amount at the GOP break regarding the base encoded stream, and supplies it to the IN point / OUT point determination unit 141 and the re-encode range determination unit 142. Thereby, for example, using the technique described in the above-mentioned Japanese Patent Application Laid-Open No. 2006-67095 and other known techniques, VBVoccupancy can be made continuous between a part that does not perform re-encoding and a part that executes re-encoding. It becomes possible.

  In step S <b> 65, the editing processing control unit 143 supplies a control signal for controlling the encoded stream of the background from the GOP break to the encoding control unit 93 of the CPU 122. Based on the control signal supplied from the edit processing control unit 85, the encoding control unit 93 controls encoding by the encoder 60 from the first frame of the GOP in which the background encoded stream is present. The CPU 121 starts obtaining the encoding result supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42, supplies it to the memory 43, and temporarily stores it.

  In step S66, the user input acquisition unit 82 determines whether or not an operation input has been received so that the input signal to the encoder 60 is switched from the base encoded stream to the baseband signal.

  If it is determined in step S66 that no operation input has been received so that the input signal to the encoder 60 is switched from the base encoded stream to the baseband signal, the edited stream selection unit 144 selects the memory 43 in step S67. Is temporarily discarded, the process returns to step S65, and the subsequent processing is repeated.

  If it is determined in step S66 that an operation input has been received so that the input signal to the encoder 60 is switched from the base encoded stream to the baseband signal, the edited stream selection unit 144 temporarily stores in the memory 43 in step S68. Starts accumulation from the beginning of the GOP that includes the IN point in the stored encoding results.

  In step S <b> 69, the IN point / OUT point determination unit 141 determines an IN point in editing, and supplies it to the editing processing control unit 143. The edit processing control unit 143 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 122 and supplies the control signal to the CPU 122. The # 1 switch control unit 92 of the CPU 122 controls the operation of the switch / effect 58 to switch the data to be output at the editing point, and the input signal to the encoder 60 is changed from the baseband signal corresponding to the underlying encoded stream. The baseband signal supplied from the input terminal 61 is switched, that is, the baseband signal corresponding to the underlying encoded stream and the baseband signal supplied from the input terminal 61 are connected.

  In step S <b> 70, the user input acquisition unit 82 determines whether or not an operation input has been received so that the input signal to the encoder 60 is switched from the baseband signal to the ground encoded stream. If it is determined in step S70 that no operation input has been received so that the input signal to the encoder 60 is switched from the baseband signal to the base encoded stream, the processing in step S70 is performed until it is determined that the operation input has been received. Is repeated.

  If it is determined in step S70 that an operation input has been received so that the input signal to the encoder 60 is switched from the baseband signal to the background encoded stream, in step S71, the IN point / OUT point determination unit 141 performs editing. Detect OUT point.

  In step S72, the IN point / OUT point determination unit 141 supplies information indicating the detected OUT point to the editing process control unit 143. The edit processing control unit 143 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 122 and supplies the control signal to the CPU 122. The # 1 switch control unit 92 of the CPU 122 controls the operation of the switch / effect 58 to switch the data to be output at the editing point, and the input signal to the encoder 60 is changed from the baseband signal supplied from the input terminal 61 to the background. The baseband signal corresponding to the encoded stream is switched. That is, the edit processing control unit 85 connects the baseband signal supplied from the input terminal 61 and the baseband signal corresponding to the base encoded stream.

  In step S73, as described with reference to FIG. 24, the re-encoding range determination unit 142 changes the GOP break immediately after the OUT point, that is, from the beginning of the GOP next to the GOP including the OUT point to the end point of the GOP. VBVoccupancy adjustment encoding for the set VBVoccupancy target value is executed, and the encoding process is controlled so that the VBV occupancy at the stream connection position at the end of encoding matches, and the re-encoding end position is determined. The encoding range is supplied to the edit processing control unit 143. The editing process control unit 143 supplies a control signal for controlling encoding by the encoder 60 to the encoding control unit 93 of the CPU 122. Based on the control signal supplied from the edit processing control unit 143, the encoding control unit 93 controls encoding by the encoder 60 from the first frame of the GOP including the IN point of the background encoded stream.

  In step S74, the re-encode range determination unit 142 determines whether or not the encoding by the encoder 60 has been correctly completed. If it is determined in step S74 that the encoding by the encoder 60 has not ended correctly, that is, the VBV occupancy at the stream connection position at the end of encoding does not match, the process returns to step S73, and thereafter The process is repeated.

  If it is determined in step S74 that the encoding by the encoder 60 has been correctly completed, in step S75, the CPU 41 is supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42 and stored in the memory 43. The encoded stream of the edited part is supplied to the drive 47 via the south bridge 45 and recorded in a predetermined recording area of the attached recording medium 48, thereby encoding the part that has not been edited. The process ends after connecting the stream.

  Note that if the recording speed and playback speed of the recording medium 48 by the drive 47 are sufficiently higher than the speed of the code that is currently recording and playing back, the baseband image data corresponding to the underlying encoded stream is played back. However, it is possible to record newly created code data after editing on the recording medium 48.

  By such processing, for example, the editing point can be determined while the operator monitors the video of the editing material without editing the frame as in the editing device 31 of the first embodiment, and editing is performed faster than before. A result can be obtained and image degradation can be reduced.

  Here, the GOP phase of the encoded stream to be overwritten is controlled to have the same configuration as the GOP phase of the base encoded stream.

  As described above, since both the editing apparatus 31 of the first embodiment and the editing apparatus 101 of the second embodiment use the baseband signal as it is for the editing process, the baseband signal is used. Since it is not necessary to compress the band signal before editing, it is possible to prevent deterioration in image quality, shorten the processing time, and there is no need for a memory having a large recording area for temporarily storing the compressed signal. is there.

  In the above description, in the second embodiment, the GOP phase of the encoded stream to be overwritten is controlled to have the same configuration as the GOP phase of the underlying encoded stream. However, also in the first embodiment, the GOP phase of the encoded stream to be overwritten may be controlled to have the same configuration as the GOP phase of the underlying encoded stream.

  By the way, even if it is desired to change the editing point after editing is executed by the processing described using the first embodiment and the second embodiment, before the IN point and after the OUT point of the baseband signal. Since this part is not left as a material stream, the editing point cannot be easily changed.

  For example, using the baseband signal input from the input terminal 61 using the encoded stream stored in advance in the HDD 46 as background data, the first embodiment and the second embodiment described above will be used. When overwriting editing is performed by the above processing, the edited encoded stream finally generated is stored in the HDD 46. After that, if you want to advance the overwrite start position of the baseband signal, delay the overwrite end position, or change the data to be overwritten to the baseband signal at a different timing, as the editing material, before the IN point, Since the baseband signal after the OUT point is not recorded, the baseband signal must be reacquired and edited again.

  By repeating the editing in this way, there is a possibility that a plurality of generations may be lost depending on the editing position.

  Therefore, it is preferable to use the baseband signal as the editing material for editing, execute the baseband signal encoding process, and generate stream data that can be used when the editing process is performed again. It is.

  Therefore, as a third embodiment of the present invention, an editing apparatus 171 that uses a baseband signal as an editing material for editing and executes a baseband signal encoding process will be described with reference to FIG.

  Note that portions corresponding to those in the editing apparatus 31 in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  32 includes a CPU 181 in place of the CPU 41, a CPU 182 in place of the CPU 52, a frame buffer 184 in place of the frame buffer 59, and a baseband input from the input terminal 61. The configuration is basically the same as that of the editing device 31 of FIG. 4 except that an encoder 183 is newly provided to encode a signal and supply the encoded signal to the PCI bridge 49.

  In addition to the functions of the CPU 41, the CPU 181 controls the encoding process of the baseband signal input from the input terminal 61 by the encoder 183, sets the encoding range by the encoder 60, and the stream in which the editing process is performed In addition, a function of controlling connection between an editing base stream that has not been subjected to editing processing and a stream in which a baseband signal is encoded by the encoder 183 is provided.

  In addition to the function of the CPU 52, the CPU 182 controls the encoding of the baseband signal input from the input terminal 61 by the encoder 183, and the GOP phase and VBVoccupancy value of the encoded stream obtained as a result of encoding by the encoder 183. Obtained and based on this, the processing of the encoder 60 is controlled.

  The encoder 183 encodes the baseband signal supplied from the input terminal 61. The encoder 183 performs encoding at an arbitrary GOP phase considered to be the best. The encoded stream corresponding to the baseband signal of the editing material encoded by the encoder 183 and the management data such as VBVoccupancy of each frame are transferred to the HDD 46 via the PCI bus 44, the north bridge 42, and the south bridge 45. Supplied and stored. Furthermore, the encoder 183 supplies information including at least the GOP phase and VBVoccupancy value of the encoded stream obtained as a result of encoding to the CPU 182 via the control bus 51.

  The frame buffer 184 holds the supplied baseband image data for a predetermined period and supplies it to the encoder 60. During the buffering period by the frame buffer 184, the encoder 60 receives the designation of the IN point and OUT point by the user referring to the monitor 1 to the monitor 3 that displays the data before buffering, and then performs the editing process by the encoder 60. This is a period during which the range of data to be encoded can be determined, and a period during which the encoding result by the encoder 183 can be used for determining parameters of the encoding process by the encoder 60. Details thereof will be described later.

  Next, the operation of the editing device 171 in FIG. 32 will be described.

  When the user gives an instruction to start editing processing and receives selection of stream data to be used as an editing background from the stream data stored in the HDD 46, the CPU 181 controls each unit to select the selected stream. The data is read from the HDD 46 and supplied to the decoder 54 or the decoder 55 via the south bridge 45, the north bridge 42, the PCI bus 44, and the PCI bridge 49.

  The data supplied to the decoder 54 or the decoder 55 is decoded and supplied to the switch / effect 58. Here, it is assumed that the stream data used as the editing background is supplied to the decoder 54, decoded, displayed on the monitor 1, and supplied to the switch / effect 58.

  The baseband signal (SDI input) input from the input terminal 61 is displayed on the monitor 2 via the switch 57, supplied to the switch / effect 58, and further supplied to the encoder 183 for encoding. The The stream corresponding to the baseband signal encoded and generated by the encoder 183 is supplied to the PCI bridge 49, temporarily stored in the memory 50, and then further via the PCI bus 44 and the north bridge 42. The data is supplied to the memory 43, used for editing processing, and further supplied to the HDD 46 via the south bridge 45, where it is stored so that it can be used for re-editing such as change of editing points.

  Data supplied to the switch / effect 58 and output data from the switch / effect 58 are displayed on the monitors 1 to 3. What is displayed is data before buffering by the frame buffer 184.

  The signal output from the switch / effect 58 is switched at a predetermined timing, or is switched at an arbitrary timing by the user monitoring the monitors 1 to 3. This switching timing is the editing point.

  An example of editing processing will be described with reference to FIG. In FIG. 33, the stream 1 stored in the HDD 46 used as the main storage at the IN point is connected to the SDI input, that is, the baseband signal input from the input terminal 61, and the baseband signal at the OUT point. To the stream 2 stored in the HDD 46, that is, an editing process is performed in which the above-described assembly editing is repeated twice. Here, when stream 1 and stream 2 are the same stream, the editing process shown in FIG. 33 is the above-described insert editing.

  As described above, the editing device 171 performs splicing for connecting the bridge clip generated by connecting the baseband signal at the editing point and performing the encoding process, and the streams connected before and after the bridge clip. It is possible to execute processing, and an encoder 60 used to generate a bridge clip and an encoder 183 used to encode and hold the SDI input, which is a baseband input used as an editing material, in the HDD 46 Has an encoder.

  The encoder 183 encodes the baseband signal with an arbitrary phase, the maximum GOP length usable in this system, or a predetermined GOP length irrespective of the stream 1 and the stream 2 stored in the HDD 46.

  If it is desired to encode and hold the baseband signal supplied for re-editing while performing the editing process as shown in FIG. 33, the baseband signal is encoded once when simply considered. It is only necessary to decode and encode only the part necessary for editing after the stream is formed. In this case, for example, from the IN point, the part indicated by β or γ in the figure, or from ε or δ in the figure The baseband signal in the range to be encoded again, such as the portion indicated by the OUT point, will be lost by one generation. Therefore, in the editing apparatus 171, the baseband signal is used as it is without being encoded for the part that performs the editing process, and the baseband signal encoding process is executed independently of the editing process.

  Accordingly, the SDI input is supplied to the switch / effect 58 via the switch 57 and connected to the output obtained by decoding the stream 1 or stream 2 in the same manner as in the editing apparatus 31 described above, and the editing is performed. Independent of the processing, the encoder 183 encodes an arbitrary frame period and an arbitrary frame period, and supplies the encoded data to the PCI bridge 49. The material stream is stored in the memory via the PCI bus 44 and the north bridge 42. 43 and supplied to the HDD 46 via the south bridge 45 for recording.

  In the first embodiment and the second embodiment described above, the baseband signal between the IN point and the OUT point is continuously supplied to the encoder 60 and encoded to generate an edited stream. However, in the editing device 171, the encoder 183 performs baseband signal encoding processing independently of the editing processing, so that the IN point and OUT point do not overlap the encoding processing. The stream generated by the encoder 183 can be used as a part of the edited stream corresponding to the period.

  At this time, in the stream after editing, a portion encoded by the encoder 60 near the IN point and the OUT point is referred to as a bridge clip (BridgeClip).

  In addition, in order to continuously reproduce the bridge clip portion encoded by the encoder 60 and the portion encoded by the encoder 183 as an encoded stream after editing, the bridge clip and the encoder 183 are encoded. It is necessary to make VBVoccupancy continuous and match the GOP phase at the connection portion with the connected portion.

  Note that the processing of the connection portion between the bridge clip portion encoded by the encoder 60 and the stream 1 and stream 2 is executed in the same manner as in the first embodiment described above.

  When the user instructs the IN point with reference to the stream 1 displayed on the monitor 1 and the baseband input output to the monitor 2, the bridge clip start point including the IN point is It must be obtained before the start of encoding by the encoder 60. The bridge clip start point is basically the same as the start point of the re-encoding range described above. For example, in FIG. 33, the start point of the GOP including the IN point is indicated by α in the figure.

  That is, the frame buffer 184 needs to hold at least a frame between the IN point and the bridge clip start point (α) and delay the supply of the signal to the encoder 60. At this time, the frame buffer 184 further needs a capacity for earning a command delay and a time required for parameter calculation.

  Further, the frame buffer 184 performs a splicing operation for connecting a portion encoded by the encoder 60 with the data connected in the switch / effect 58 and a portion before and after the portion, ie, a VBV target value in the range of the bridge clip, that is, It is necessary to earn time until the VBVoccupancy value of the bridge clip end scheduled point which is the bridge clip end scheduled point is obtained as a result of encoding by the encoder 183. The bridge clip scheduled end point including the IN point is a GOP break including a portion corresponding to the IN point in the GOP phase of the stream generated by encoding the baseband signal input from the input terminal 61 by the encoder 183, or This is the next B1 picture. In FIG. 33, for example, it is a point indicated by β in the figure. The VBVoccupancy value of the bridge clip end scheduled point is the VBVoccupancy value of the corresponding part in the encoder 183. In addition, the range of the bridge clip may be extended as a result of encoding by the encoder 60. In this case, the scheduled bridge clip end point is, for example, the next GOP break in the GOP phase in encoding by the encoder 183 or the next B1 picture. In FIG. 33, for example, the point indicated by γ in the figure Become.

  Therefore, in the editing apparatus 171, the connected data output from the switch / effect 58 is delayed for a predetermined period by the frame buffer 184, thereby reflecting the encoding result by the encoder 183 in the encoding process by the encoder 60, and before and after the BridgeClip. It is assumed that the stream can be reproduced continuously at the connection portion.

  The encoder 183 supplies information regarding the encoding process of the baseband signal input from the input terminal 61 to the CPU 182 via the control bus 51. The information related to the baseband signal encoding processing includes at least information related to the GOP phase and VBVoccupancy. In addition to this, for example, other encoding parameters such as a Q matrix are supplied to the CPU 182. It may be. Further, the encoder 183 supplies the information related to the encoding process together with the encoded stream to the PCI bridge 49 and stores it in the memory 50, and also via the PCI bus 44, the north bridge 42, and the south bridge 45. Then, the data is supplied to and stored in the HDD 46. By storing the information related to the baseband signal encoding process in the HDD 46, when the encoded stream corresponding to the baseband signal input from the input terminal 61 is used in the re-editing process by changing the editing point or the like, Information relating to the encoding can be used for editing processing.

  Then, the CPU 182 controls the encoding by the encoder 60 based on the information regarding the encoding process of the baseband signal supplied from the encoder 183.

  That is, whether the user edits the editing point while viewing the monitor display or the editing point is determined in advance, when the IN point is determined, the bridge clip start point or bridge clip generation The target VBVoccupancy at the planned end point of the bridge clip cannot be determined. In addition, when the bridge clip encoded by the encoder 60 and the stream encoded by the encoder 183 are connected, it is desired to avoid that the GOP including the connection point becomes extremely long or short. For this reason, the CPU 182 knows the GOP phase of the stream encoded by the encoder 183, and after the target VBVoccupancy at the connection point is determined, the CPU 182 needs to start encoding by the encoder 60 by going back to the start point of the bridge clip encoding process. is there.

  Based on these conditions, the frame buffer 184 determines that the maximum GOP length of encoding by the encoder 183 is N, and has a capacity of (2N + X) frames, the bridge clip and the portion encoded by the encoder 183 are Can be encoded such that VBVoccupancy is continuous and the GOP phase matches. Here, N is the number of frames that 1 GOP has, and the value of X will be described later.

  The encoder 60 encodes data delayed by a predetermined number of frames by the frame buffer 184 based on the control of the CPU 182, and supplies the encoded data to the PCI bridge 49. Control of VBVoccupancy at the starting point of encoding is performed in accordance with the background stream, as in the first and second embodiments described above. In addition, the encoder 60 extends the range of the bridge clip as necessary, or re-encodes the bridge clip based on the control of the CPU 182 in the same manner as described above so as to match the target VBVoccupancy. It is possible to perform a two-pass encoding to be performed.

  Here, the scheduled bridge clip end point (β) including the IN point is basically the last frame of the GOP including the frame corresponding to the IN point or the next B1 picture in the encoding by the encoder 183. is there. The encoder 60 acquires the value of VBVoccupancy in the encoding result by the encoder 183 of the frame corresponding to the planned bridge clip end point (β) from the CPU 182 via the control bus 51, and performs encoding using this as the target value. be able to. Even when the scheduled bridge clip end point becomes (γ) due to the extension of the encoding range, the encoder 60 receives the bridge clip end scheduled point (γ from the CPU 182 via the control bus 51. ), The value of VBVoccupancy in the result of encoding by the encoder 183 is obtained, and the extended portion can be encoded using this as a target value.

  Further, for example, it is conceivable that the extension of the range of the bridge clip including the IN point continues and the bridge clip extends to the bridge clip including the OUT point. The target value of VBVoccupancy at the scheduled end point of the bridge clip including the OUT point is known without waiting for the encoding process by the encoder 183 since the stream 2 is a stream stored in the HDD 46 in advance. Therefore, even in such a case, if the frame buffer 184 has a capacity of about (2N + X) frames, where N is the maximum GOP length of encoding by the encoder 183, the encoder 60 has determined the OUT point. At this stage, the VBVoccupancy value at the point indicated by ζ in the figure, which is the planned bridge clip end point after the OUT point, can be acquired from the CPU 182 via the control bus 51 as the VBVoccupancy target value. No bankruptcy.

  Of course, when the bridge clip end point including the IN point does not reach the bridge clip including the OUT point, that is, when the bridge clip including the IN point ends at a point indicated by β or γ in the figure, the bridge clip is encoded. After the completion, the supply of the baseband signal to the encoder 60 and the encoding process are finished. The start point of the bridge clip including the OUT point is set in accordance with the phase of the encoding process by the encoder 183, buffering to the frame buffer 184 and the encoding process by the encoder 60 are started, and the frame buffer at the OUT point. The input to 184 is switched to stream 2 and the corresponding part of stream 2 is encoded.

  The PCI bridge 49 is supplied with the stream in which the bridge clip portion including the IN point and the OUT point is encoded by the encoder 60, and once stored in the memory 50, the PCI bus 44 and the north bridge 42 are connected. To the memory 43.

  For example, in FIG. 33, when the bridge clip including the IN point is a portion indicated by α to γ in the drawing and the bridge clip including the OUT point is a portion indicated by ε to ζ in the drawing, the stream after editing is The portion of the stream 1 recorded in the HDD 46 before the point indicated by α in the figure, the stream in which the bridge clip indicated by α to γ in the figure is encoded by the encoder 60, and indicated by γ to ε in the figure. A stream in which the baseband signal to be encoded is encoded by the encoder 183, a stream in which the bridge clip indicated by ε to ζ in the figure is encoded by the encoder 60, and a point indicated by ζ in the figure of the stream 2 recorded in the HDD 46 It consists of a rear part.

  That is, the encoder 60 performs the encoding process only on the part corresponding to the bridge clip.

  In this way, the baseband signal as the material is encoded and stored with the maximum encoding efficiency, and the editing process is performed in the same manner as in the first embodiment described above, and is sandwiched between the IN point and the OUT point. It is possible to prevent the encoding process of parts from overlapping. In this way, editing processing can be executed while preventing generation loss as much as possible, and it is possible to cope with later editing point changes.

  Next, referring to FIG. 34 to FIG. 45, the minimum value required as the difference between the encoding timing of the SDI input signal by the encoder 183 and the encoding timing of the bridge clip by the encoder 60, that is, the buffer required for the frame buffer 184. The details of the minimum value of the capacity will be described by taking as an example the case of various patterns of edit point setting.

  First, the case where the IN point coincides with the GOP break in the GOP phase when the SDI input is encoded by the encoder 183 will be described with reference to FIG.

  The encoding start point of the bridge clip including the IN point is from the GOP cut α of the stream 1 existing before the IN point when the point indicated by β in the figure which is the IN point and the GOP cut of the stream 1 do not match. . Since it is necessary to input a forward reference picture to start encoding from α, input to the encoder 60 is started one frame before α. The encoding range of the bridge clip including the IN point is that when the IN point is a SDI input GOP break, the forward reference picture of the B0 picture and B1 picture immediately after that is the picture immediately before the SDI input GOP break. , Up to B1 picture ahead of GOP break β of SDI input. That is, the target VBVoccupancy value at the encoding end point of the bridge clip including the IN point is determined after the encoding is completed up to the start position of the first P picture in the codec order after the GOP break β, that is, the B1 picture. Therefore, at most, a margin of 3 frames is required from the GOP break β.

  Details of the technique for setting the encoding range up to the next B1 picture instead of up to the GOP break are described in, for example, Japanese Patent Laid-Open No. 2006-67095.

  In FIG. 34, N is the maximum encoding GOP length in the encoder 183, and a is the encoding parameter based on the command execution margin time (time corresponding to one command delay) and the target VBVoccupancy value supplied from the CPU 182. The time to calculate is a value represented by the number of frames, and b is the target after the frame input necessary to know the encoding result is completed after the frame input necessary for encoding the frame to know the encoding result is completed. It is a value that represents the time until VBVoccupancy is known by the number of frames.

  When α to β is the longest, α to β is N−1 frames. Therefore, the frame buffer 184 needs a capacity of 1+ (N−1) + 3 + a + b = N + 3 + a + b frames.

  Next, with reference to FIG. 35, a case where the IN point becomes a GOP break of stream 1 will be described.

  In this case, the encoding of the bridge clip including the IN point starts from the IN point of the SDI input. The encoding range of the bridge clip including the IN point may be up to the B1 picture of the GOP next to the GOP or may be up to the GOP break. Assuming that the encoding range of the bridge clip including the IN point is up to the B1 picture of the next GOP, the target VBVoccupancy value at the encoding end point of the bridge clip including the IN point is the same as in FIG. Since it is the start position of the first P picture in the codec order after β, a maximum of 3 frames from the GOP break β is required.

  In the case of FIG. 35, when the distance from the IN point to the end point β of the bridge clip is the longest, it is N−1 frames. Therefore, as in FIG. 34, when N, a, and b are used, the frame buffer 184 needs to have a capacity of 1+ (N−1) + 3 + a + b = N + 3 + a + b frames.

  Next, the maximum capacity required in the frame buffer 184, that is, the maximum number of frames that can be delayed by the frame buffer 184 will be described with reference to FIG.

  As described with reference to FIG. 34, the condition of α that is the bridge clip start position where the capacity of the frame buffer is most required is that the position of α that is the bridge clip start point is (N−1) frames before the IN point. This is the case. Further, as described with reference to FIG. 35, the condition of the position of β, which is the planned bridge clip end point where the capacity of the frame buffer is most required, 1) The latter case.

  The VBVoccupancy at the scheduled bridge clip end point β is determined because the I picture after the scheduled end point β is input to the encoder 183, and the VBVoccupancy in the first P picture is determined, that is, the encoding of the B1 picture ends at the longest. At this point, the code amount is known.

  Therefore, the maximum capacity required in the frame buffer 184 is 1+ (N−1) + (N−1) + 3 + a + b = 2N + 2 + a + b frames. In other words, when the frame buffer 184 can hold 2N + 2 + a + b frames, the encoding result of the encoder 183 can be obtained regardless of the relationship between the edit point and the GOP phase of the bridge clip portion constituting the front and rear of the edit point. Can be reflected in the encoding of the bridge clip by the encoder 60, and the encoding process does not fail.

  Note that splicing related to the OUT point may be started from one frame before the SDI input GOP cut before the OUT point (forward reference image), and the HDD 46 is connected behind the bridge clip including the OUT point. Since the VBVoccupancy of the connection point is known in advance, the VBVoccupancy target value is 1+ (N-1) + a = N + a frame after the OUT point is determined at the OUT point. For example, the encoding process does not fail.

  Next, with reference to FIG. 37 to FIG. 39, the processing of the OUT point when the splicing of the IN point is prolonged will be described.

  As described above, the maximum capacity required in the frame buffer 184 for determining an arbitrary IN point is 2N + 2 + a + b frames.

  In FIG. 37, the SDI input displayed on the monitor 2 at the timing supplied to the frame buffer 184, the baseband signal obtained by decoding the stream 1 displayed on the monitor 1, and the timing supplied to the encoder 60 are shown. An input baseband signal to the encoder 60 described on the basis and a bridge clip generated by the encoder 60 is shown.

  The baseband signal (SDI input) supplied from the input terminal 61 is encoded by the encoder 183 almost simultaneously with the timing supplied to the frame buffer 184. The encoder 183 supplies the GOP phase and VBVoccupancy related to encoding to the CPU 182 via the control bus 51.

  Therefore, after the IN point is determined, the VBVoccupancy at the scheduled bridge clip end point β is obtained as an encoding result by the encoder 183 of the SDI input at the point θ in the figure which is the B1 picture ahead of the planned bridge clip end point β. The target amount is determined. The start of encoding by the encoder 60 must be at least after the θ point when the VBVoccupancy target amount is known.

  For example, in the encoder 60, when encoding from the bridge clip start point is started at α ′ in the drawing delayed by 2N + 2 + a + b frames, this encoding result is the B1 picture ahead of β ′ corresponding to the bridge clip end scheduled point. This can be found when encoding up to θ ′ is completed. Then, ι after the (1 + a) frame is the closest GOP cut position for starting splicing for the OUT point. That is, from the GOP break β 'immediately before the splicing end point related to the SDI input IN point determined when the IN point of the SDI input is determined, (4 + a + b) ι' of the frame destination is the splicing start GOP break related to the OUT point. It becomes a limit point.

  That is, the OUT point is determined within the GOP starting from the bridge clip end point β, or there is a GOP break within (4 + a + b) frames from the bridge clip end point β, and the OUT point is within that GOP. Is determined, the splicing for the IN point is not terminated, and the encoding is continued toward the VBVoccupancy target value determined by the OUT point as it is. At that time, the target VBVoccupancy of the bridge clip related to the OUT point can be known in advance regardless of the processing of the encoder 183 as described above.

  The same thing occurs when VBVoccupancy cannot be matched up to the first bridge clip end scheduled point β and the range of the bridge clip is extended. For example, when VBVoccupancy cannot be adjusted up to the first bridge clip end scheduled point β shown in FIG. 38 and splicing is not completed, the next bridge clip end scheduled point is indicated by γ in the figure which is the next GOP break. It can be a point indicated by. In this case, it can be known whether or not splicing has been successfully completed at the next scheduled bridge clip end point γ, as shown in FIG. 38, the scheduled bridge clip end point γ is encoded by the encoder 60. That is, κ time point after b frames from the point indicated by '.

  Therefore, if VBVoccupancy cannot be adjusted up to the first bridge clip end scheduled point β and splicing is not completed, the OUT point is determined before the next bridge clip end scheduled point γ, or the first bridge clip end is completed. When a GOP break exists in the (1 + a + b) frame ahead of the scheduled point β and the OUT point is determined in the GOP starting from the GOP break, the splicing for the IN point is not finished and is determined by the OUT point as it is. Encoding continues toward the VBVoccupancy target. At that time, the target VBVoccupancy of the bridge clip including the OUT point can be known in advance regardless of the processing of the encoder 183 as described above.

  When the range of the bridge clip including the IN point is extended, a command for the position of the OUT point may be received from the user who is monitoring the monitors 1 to 3. Further, the OUT point may be designated in advance. In any case, the CPU 182 needs to determine whether or not the range is continuous with the bridge clip including the OUT point before the encoding of the bridge clip including the OUT point by the encoder 60 is started.

  The CPU 182 uses the delay time by the frame buffer 184 to check whether or not the splicing process of the bridge clip including the IN point has been correctly completed after the OUT point is detected, and then the bridge clip including the IN point. However, depending on the GOP phase near the OUT point, it is preferable not to wait for the completion of the splicing process for the bridge clip including the IN point. In some cases, the bridge clip including the IN point must be continuous including the bridge clip including the OUT point.

  Such a case will be described with reference to FIG. In FIG. 39, a is a value representing the time for calculating the encoding parameter based on the command execution margin time and the target VBVoccupancy value supplied from the CPU 182 in terms of the number of frames, and b wants to know the encoding result. It is assumed that the time from the completion of frame input necessary to encode a frame to the completion of encoding of the frame for which the encoding result is desired to be known until the target VBVoccupancy is known is represented by the number of frames.

  In the encoding of the SDI input by the encoder 182, the CPU 182 determines whether to extend the range of the bridge clip based on the value of VBVoccupancy in the encoding result of the end point of the bridge clip being encoded. The CPU 182 can know the value of VBVoccupancy in the encoding result of the bridge clip scheduled end point after b frames after the input of the frame.

  As shown in FIG. 39, it is assumed that the scheduled end point of the bridge clip being encoded is δ, the head of the GOP including the determined OUT point is ε, and the number of frames between δ and ε is k frames. The encoding of stream 2 for a bridge clip including an OUT point must be able to start from (N + a) frames before the OUT point. When the first ε to the OUT point of the GOP including the OUT point are N−1 frames, the frame from δ to the OUT point is k + (N−1) frames. Therefore, after the CPU 182 confirms whether or not the splicing process of the bridge clip including the IN point is correctly completed, the number of surplus frames that can be determined whether the bridge clip including the OUT point is continuous is determined as follows: k + (N-1) -b- (N + a) = k- (1 + a + b) frames.

  In this case, for example, if a = 1 and b = 3, and k is 6 frames or more, the CPU 182 confirms whether or not the splicing processing of the bridge clip including the IN point has been correctly completed, and then the OUT point. It is possible to determine whether or not it is continuous including the bridge clip including. However, when the encoding process by the encoder 183 allows the minimum GOP length to be 5 frames or less, the CPU 182 does not wait for the completion of the splicing process of the bridge clip including the IN point, and the CPU 182 It is necessary to determine that it is continuous including the bridge clip including the OUT point.

  That is, the longest GOP length permitted in the encoding process by the encoder 183 is k, and as described above, a represents the time for calculating the encoding parameter based on the command execution margin time and the target VBVoccupancy value supplied from the CPU 182 as a frame. B is a value from the end of the frame input necessary to encode the frame whose encoding result is desired to be encoded until the encoding of the frame whose information is desired is completed and the target VBVoccupancy is known. When k− (1 + a + b) is a positive value when the time is a value represented by the number of frames, the CPU 182 confirms whether or not the splicing process of the bridge clip including the IN point has been correctly completed. After that, it is determined whether or not it continues including the bridge clip including the OUT point. Door can be.

  On the other hand, when k− (1 + a + b) is a negative value, in other words, when k ≦ (1 + a + b), a command for the position of the OUT point is received from the user monitoring the monitors 1 to 3. When the splicing process of the IN point is not completed at the point in time, or the encoding of 1 GOP before the GOP including the OUT point designated in advance by the encoder 60 is started, the splicing process of the bridge clip including the IN point is performed. Without waiting for the end, the CPU 182 needs to determine that the bridge clip including the IN point is continuous including the bridge clip including the OUT point.

  Next, the monitor output and the input to the encoder 60 when the buffer capacity of the frame buffer 184 is 2N + 2 + a + b will be described with reference to FIGS.

  In FIG. 40 to FIG. 45, both the monitor output and the encoder input A correspond to the background streams (for example, corresponding to the stream 1 and the stream 2 in FIG. 33) stored in advance in the HDD 46. Corresponds to a baseband signal (SDI input) input from the input terminal 61.

  When the buffer capacity of the frame buffer 184 is 2N + 2 + a + b, for example, as shown in FIG. 40, from the beginning of the GOP including the IN point to the IN point in the base stream is the k1 frame, and from the IN point in the baseband signal When the decoding is performed by the decoder 183 and the end point of the GOP including the IN point in the GOP phase is a k2 frame, the encoding result at the bridge clip scheduled end point in the decoding process by the decoder 183 executed in parallel with the monitor output Is supplied to the CPU 182 after (k2 + 3 + b) frames with respect to the IN point in the monitor output. Also, the input to the encoder 60 within the bridge clip range is delayed by 2N + 2 + a + b frames by the frame buffer 184. Therefore, even if it is considered that the encoding start command is issued before the input of the forward reference image for starting the encoding by the encoder 60, the CPU 182 acquires the encoding result at the bridge clip scheduled end point, There is a margin of 2N−2−k1−k2 by (2N + 2 + a + b) −k1−k2− (3 + b) − (a + b) until the start of the bridge clip encoding control in the encoder 60.

  Therefore, if the buffer capacity of the frame buffer 184 is 2N + 2 + a + b, for example, as shown in FIG. 41, when k1 and k2 are the largest number of frames, that is, k1 is N−1 frames and k2 is N Even in the case of −1 frame, the CPU 182 can start the encoding control of the bridge clip in the encoder 60 after obtaining the encoding result at the bridge clip end scheduled point.

  Next, a case will be described in which the number of frames included in a bridge clip for splicing determined by the positions of GOP breaks before and after the IN point is less than the minimum GOP length considered for maintaining image quality. For example, as shown in FIG. 42, the KOP frame is from the beginning of the GOP including the IN point to the IN point in the base stream, and the IN point in the GOP phase in the decoding by the decoder 183 is determined from the IN point in the baseband signal. In the case where the end point of the included GOP is k2 frames and the number of frames of k1 + k2 frames is extremely small, if only this range is used as a bridge clip, code distribution in encoding processing is difficult, and image quality is maintained. It may not be possible. Accordingly, it is assumed that the bridge clip is further up to the next GOP.

  At this time, the encoding result at the bridge clip end scheduled point in the decoding processing by the decoder 183 executed in parallel with the monitor output is supplied to the CPU 182 after (k2 + N + 3 + b) frames with respect to the IN point in the monitor output. . That is, (2N + 2 + a + b) −k1−k2−N− (3 + b) − from when the CPU 182 acquires the encoding result at the bridge clip scheduled end point to when the encoder 60 starts controlling the encoding of the bridge clip. At (a + b), there is a margin of N-2-k1-k2.

  That is, when k1 + k2 is N-2 frames or less, even if the bridge clip is extended to the next GOP, the CPU 182 obtains the encoding result at the scheduled bridge clip end point, and then the encoder 60 encodes the bridge clip. Control can begin.

  Next, in the encoding of the bridge clip for the splicing process including the OUT point, for example, as shown in FIG. 43, in the baseband signal, the start point of the GOP including the OUT point in the GOP phase in the decoding by the decoder 183 The k3 frame is from the OUT point to the OUT point, and the k4 frame is from the OUT point to the end of the GOP including the OUT point in the base stream. Here, since the OUT point is designated and the VBVoccupancy target amount at the scheduled end point of the bridge clip including the OUT point is the VBVoccupancy at the corresponding position of the background stream stored in advance in the HDD 46, the CPU 182 It is possible to recognize the VBVoccupancy target amount without waiting for completion of decoding of the bridge clip range by H.183. Therefore, since the buffer capacity of the frame buffer 184 is 2N + 2 + a + b, the CPU 182 can control the encoding of the bridge clip including the OUT point without any problem.

  Next, a case will be described in which the number of frames included in the bridge clip for splicing determined by the positions of GOP breaks before and after the OUT point is less than the minimum GOP length considered for maintaining image quality. For example, as shown in FIG. 44, the k3 frame is from the start point of the GOP including the OUT point to the OUT point in the GOP phase in the decoding by the decoder 183, and the last GOP including the OUT point from the OUT point in the underlying stream. Up to k4 frames, and when the number of frames of k3 + k4 frames is extremely small, if only this range is used as a bridge clip, code distribution in the encoding process may be difficult and image quality may not be maintained. is there. Therefore, the CPU 182 sets the start point of the bridge clip as the start point of the previous GOP, increases the number of frames included in the bridge clip, and configures the 2GOP with the encoded result of the minimum bridge clip so as to form the 2GOP. Controls the encoding process by. Even in such a case, since the buffer capacity of the frame buffer 184 is 2N + 2 + a + b, the CPU 182 can control the encoding of the bridge clip including the OUT point without any problem.

  Further, as described above, the bridge clip including the OUT point may be continuous with the bridge clip including the IN point. As shown in FIG. 45, even if the number of frames of k3 + k4 is sufficient, even if the start point of the bridge clip including the OUT point is one GOP before, the CPU 182 Until the bridge clip including the OUT point, the encoding process of the encoder 60 is controlled as a bridge clip including the IN point. Since the CPU 182 can recognize the VBVoccupancy target amount of the bridge clip end scheduled point including the OUT point before the start of the encoding of the bridge clip including the OUT point, the CPU 182 continues to determine the OUT point by the encoder 60. The encoding process of the included bridge clip can be controlled.

  In the above-described processing, the encoded stream stored in advance in the HDD 46 is used as the background, and the baseband signal input from the input terminal 61 is used as the editing material for overwriting. Even if the baseband signal input from the input terminal 61 is used as the background and the encoded stream stored in advance in the HDD 46 is used as the editing material for overwriting, the IN point and OUT The point processing is only reversed, and if the buffer capacity of the frame buffer 184 is 2N + 2 + a + b, the CPU 182 can control the encoding of the bridge clip without any problem.

  FIG. 46 is a functional block diagram for explaining the functions of the CPU 181 and the CPU 182 of the editing apparatus 171 that executes the bridge clip encoding process described with reference to FIGS.

  Note that portions corresponding to those in FIG. 16 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  That is, the functions of the CPU 181 are the same as those shown in FIG. 5 except that a bridge clip range determining unit 191 is provided instead of the re-encoding range determining unit 84 and an editing process control unit 192 is provided instead of the editing process control unit 85. 16 is basically the same as the function of the CPU 41 described with reference to FIG. 16, and the function of the CPU 182 is newly provided with an encoding control unit 201 for baseband signals, and performs encoding control instead of the encoding control unit 93. Except for the provision of the unit 202, it is basically the same as the function of the CPU 52 described with reference to FIG.

  The bridge clip range determination unit 191 includes a user operation input supplied from the user input acquisition unit 82, various parameters acquired by the parameter acquisition unit, an IN point determined by the IN point / OUT point determination unit 83, and Based on the OUT point, the range of the bridge clip described above is determined and supplied to the edit processing control unit 192.

  Based on the IN point and OUT point determined by the IN point / OUT point determining unit 83 and the range of the bridge clip determined by the bridge clip range determining unit 191, the editing process control unit 192 includes a PCI bridge 49, a decoder 54 to decoder 56, switch 57, switch / effect 58, encoder 60, switch 62, and commands for controlling the operation of the decoder 183, etc., and the north bridge 42, PCI bus 44, PCI bridge 49, and The generated command is supplied to the CPU 182 via the control bus 51.

  In other words, the edit processing control unit 192 controls the PCI bridge 49 and the switch 57 so that only the bridge clip is supplied to the encoder 60 and encoded, thereby the bridge clip including the IN point and the bridge clip including the OUT point. It is possible to prevent the encoder 60 and the encoder 183 from overlapping the encoding process of the portion between the two.

  The baseband signal encoding control unit 201 controls the encoder 183 to control the encoding process of the baseband signal input from the input terminal 61 and the supply of the result of the encoding process to the CPU 182.

  The encoding processing unit 202 controls the operation of the encoder 60 based on the command supplied from the editing processing control unit 192 and the baseband signal encoding result supplied from the encoder 183.

  Next, editing processing 3 executed by the editing device 171 will be described with reference to the flowcharts of FIGS. 47 to 50.

  In step S <b> 111, the CPU 181 reads the background encoded stream recorded in the HDD 46 and supplies the encoded stream to the PCI bridge 49 via the north bridge 42 and the PCI bus 44. The CPU 182 temporarily stores the supplied background encoded stream in the memory 50 as necessary, and then supplies it to the decoder 54. Based on the control of the decoding control unit 91, the decoder 54 starts decoding the supplied background encoded stream, and supplies the baseband signal generated by decoding to the switch / effect 58.

  In step S <b> 112, the CPU 181 starts control of the input of the baseband signal from the input terminal 61 and the encoding of the baseband signal by the encoder 183. The encoder 183 encodes the supplied baseband signal based on the control of the baseband signal encoding control unit 201.

  In step S113, the encoder 183 supplies the CPU 182 with the GOP phase and VBVoccupancy values related to encoding based on the control of the baseband signal encoding control unit 201. The CPU 182 acquires the GOP phase and VBVoccupancy values related to encoding. As a result, the CPU 182 can know the GOP phase and VBVoccupancy values related to encoding prior to the control of the encoding process of the bridge clip portion performed by the encoder 60 delayed by the frame buffer 184.

  In step S114, the monitor 1 and the monitor 2 start displaying the editing material before the delay, and the monitor 3 starts displaying the output of the switch / effect 58, that is, the editing result before the delay. The operator observes the video displayed on the monitor 1 and the monitor 2, and instructs the timing to switch the signal from an operation input unit (not shown).

  In step S115, the parameter acquisition unit 81 of the CPU 181 acquires GOP phase information related to the background encoded stream, and supplies the GOP phase information to the IN point / OUT point determination unit 83 and the bridge clip range determination unit 191. As a result, the CPU 181 can detect a GOP break in the underlying encoded stream. In addition, since the CPU 181 recognizes the buffer capacity of the frame buffer 184, it is possible to control the start timing of the bridge clip encoding by the encoder 60.

  In step S116, the parameter acquisition unit 81 acquires the VBV occupancy amount at the GOP break regarding the base encoded stream, and supplies it to the IN point / OUT point determination unit 83 and the bridge clip range determination unit 191. Thus, for example, using the technique described in the above-mentioned Japanese Patent Application Laid-Open No. 2006-67095 and other known techniques, VBVoccupancy is made continuous with the bridge clip and the encoded stream of the background on which re-encoding has not been executed. It becomes possible.

  In step S117, the user input acquisition unit 82 performs an operation input so as to switch the input signal to the frame buffer 184 and the encoder 60 from the baseband signal corresponding to the underlying encoded stream to the baseband signal supplied from the input terminal 61. It is determined whether or not it has been received.

  If it is determined in step S117 that an operation input for switching input signals to the frame buffer 184 and the encoder 60 has not been received, the process of step S117 is repeated until it is determined that the operation input has been received.

  If it is determined in step S117 that an operation input for switching input signals to the frame buffer 184 and the encoder 60 has been received, in step S118, the IN point / OUT point determining unit 83 determines an IN point in editing, and editing processing is performed. It supplies to the control part 192. The editing process control unit 192 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 182 and supplies the control signal to the CPU 182. The # 1 switch control unit 92 of the CPU 182 controls the operation of the switch / effect 58 to switch the data to be output at the editing point, and the input signals to the frame buffer 184 and the encoder 60 correspond to the underlying encoded stream. The baseband signal is switched to the baseband signal supplied from the input terminal 61, that is, the baseband signal corresponding to the underlying encoded stream and the baseband signal supplied from the input terminal 61 are connected. Since the supplied baseband signal is buffered in the frame buffer 184, the input to the encoder 60 is delayed by the buffer capacity of the frame buffer 184.

  In step S119, the bridge clip range determination unit 191 encodes the user operation input supplied from the user input acquisition unit 82, the various parameters acquired by the parameter acquisition unit, and the baseband signal obtained as a result of encoding by the encoder 183. Based on the GOP phase of the stream and the IN point determined by the IN point / OUT point determining unit 83, the above-described bridge clip range is determined and supplied to the editing processing control unit 192.

  In step S120, the bridge clip range determination unit 191 sets a timing for starting encoding by the encoder 60 for the GOP including the IN point based on the determined bridge clip range.

  In step S121, the encoding control unit 202 of the CPU 182 extracts the VBVoccupancy value corresponding to the scheduled bridge clip end point from the VBVoccupancy value related to encoding supplied from the encoder 183.

  In step S122, the encoding control unit 202 sets a parameter for encoding the bridge clip by the encoder 60 using the extracted VBVoccupancy value as the VBVoccupancy target value of the bridge clip scheduled end point.

  In step S123, the editing process control unit 192 receives a control signal for controlling encoding by the encoder 60 from the first frame of the GOP including the IN point of the background encoded stream, which is buffered by the frame buffer 184. Is supplied to the encoding control unit 202. Based on the control signal supplied from the editing processing control unit 192, the encoding control unit 202 encodes the encoder 60 from the first frame of the GOP including the IN point of the base encoded stream buffered by the frame buffer 184. Controls encoding by. The encoding control unit 202 can basically cause the encoder 60 to perform the encoding by extending the range of the bridge clip until the GOP including the OUT point.

  In step S124, the CPU 181 starts obtaining the encoding result supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42, and supplies the encoded result to the memory 43 for storage.

  In step S125, the encoding control unit 202 determines whether or not the encoding of the bridge clip by the encoding 60 has been correctly completed so that VBVoccupancy continues. If it is determined in step S125 that the encoding has been correctly completed, the process returns to step S129 described later.

  If it is determined in step S125 that the encoding has not ended correctly, in step S126, the bridge clip range determination unit 191 extends the bridge clip range, sets the bridge clip end scheduled point again, and resets the bridge clip range. The contents are supplied to the edit processing control unit 192.

  In step S127, the encoding control unit 202 of the CPU 182 extracts the value of VBVoccupancy corresponding to the reset bridge clip scheduled end point from the value of VBVoccupancy related to encoding supplied from the encoder 183.

  In step S128, the editing process control unit 192 sets the parameter of the bridge clip encoding by the encoder 60 as the VBVoccupancy target value of the bridge clip end scheduled point using the extracted VBVoccupancy value, and the extended bridge clip encoder A control signal for controlling encoding by 60 is supplied to the encoding control unit 202 of the CPU 182. The encoder 60 continues the encoding process. After the process of step S128 is completed, the process returns to step S125, and the subsequent processes are repeated.

  If it is determined in step S125 that the encoding has been correctly completed, the encoding control unit 202 of the CPU 182 notifies the CPU 181 that the encoding has been correctly completed. Therefore, in step S129, the editing process control unit 192 displays the frame buffer 184. A command for stopping the supply of data from the encoder to the encoder 60 is generated and supplied to the CPU 182. The CPU 182 stops the supply of data from the frame buffer 184 to the encoder 60, for example, by controlling the switch / effect 58 to stop the supply of data to the frame buffer 184.

  In step S 130, the user input acquisition unit 82 converts the input signals to the frame buffer 184 and the encoder 60 from the baseband signal supplied from the input terminal 61 to the base encoded stream output from the decoder 54. It is determined whether or not an operation input has been received so as to switch to a band signal.

  If it is determined in step S130 that an operation input for switching input signals to the frame buffer 184 and the encoder 60 has not been received, the process of step S130 is repeated until it is determined that an operation input for switching input signals has been received.

  If it is determined in step S130 that an operation input for switching input signals to the frame buffer 184 and the encoder 60 has been received, in step S131, the IN point / OUT point determination unit 83 determines an OUT point in editing, and edit processing is performed. It supplies to the control part 192. The editing process control unit 192 generates a control signal for controlling the # 1 switch control unit 92 of the CPU 182 and supplies the control signal to the CPU 182. The # 1 switch control unit 92 of the CPU 182 controls the operation of the switch / effect 58, switches the data to be output at the editing point, and supplies the input signals to the frame buffer 184 and the encoder 60 from the input terminal 61. The band signal is switched to the baseband signal corresponding to the underlying encoded stream. That is, the edit processing control unit 192 connects the baseband signal supplied from the input terminal 61 and the baseband signal corresponding to the base encoded stream. The frame buffer 184 buffers the connected baseband signal and the baseband signal corresponding to the base encoded stream.

  In step S132, the bridge clip range determination unit 191 encodes the user operation input supplied from the user input acquisition unit 82, the various parameters acquired by the parameter acquisition unit, and the baseband signal obtained as a result of encoding by the encoder 183. Based on the GOP phase of the stream and the OUT point determined by the IN point / OUT point determination unit 83, the range of the bridge clip including the OUT point is determined and supplied to the editing processing control unit 192. Further, the bridge clip range determination unit 191 sets a timing for starting encoding by the encoder 60 with respect to the bridge clip including the OUT point based on the determined bridge clip range.

  In step S <b> 133, the edit processing control unit 192 supplies a control signal for controlling the encoding by the encoder 60 of the bridge clip including the OUT point buffered by the frame buffer 184 to the encoding control unit 202 of the CPU 182. The encoding control unit 202 controls the encoding by the encoder 60 of the bridge clip including the OUT point buffered by the frame buffer 184 based on the control signal supplied from the editing processing control unit 192. The encoding control unit 202 can basically cause the encoder 60 to perform encoding by extending the range of the bridge clip.

  In step S134, the CPU 181 starts obtaining the encoding result supplied via the PCI bridge 49, the PCI bus 44, and the north bridge 42, and supplies the encoded result to the memory 43 for storage.

  In step S135, the encoding control unit 202 determines whether or not the encoding of the bridge clip by the encoding 60 has been correctly completed so that VBVoccupancy continues. If it is determined in step S135 that the encoding has not ended correctly, the process returns to step S132, and the subsequent processes are repeated.

  If it is determined in step S135 that the encoding has been correctly completed, in step S136, the encoding control unit 202 of the CPU 182 notifies the CPU 181 that the encoding has been correctly completed. Therefore, in step S129, the editing process control unit 192 Then, a command for stopping the supply of data from the frame buffer 184 to the encoder 60 is generated and supplied to the CPU 182. The CPU 182 stops the supply of data from the frame buffer 184 to the encoder 60 by controlling the switch / effect 58 to stop the supply of data to the frame buffer 184.

  In step S137, the CPU 181 supplies the encoded result of the edited portion supplied from the PCI bridge 49, the PCI bus 44, and the north bridge 42 and stored in the memory 43, and the bridge clip and the bridge clip. A stream encoded by the encoder 183 corresponding to the baseband signal between the base stream, a base stream before the bridge clip including the IN point stored in the HDD 46, and a base stream after the bridge clip including the OUT point. Connect to generate an edited stream, and the process ends.

  Through this process, the operator can determine the editing point while monitoring the video of the editing material, obtain the editing result faster than before, and encode the baseband signal supplied as editing material in parallel. Therefore, the process of changing the editing point after the editing is completed can be executed using the stored encoded stream corresponding to the baseband signal. Also, at this time, the encoder 60 and the encoder 183 do not perform the same baseband signal encoding process between the IN point and the OUT point, and connect the respective encoded streams after editing. Sometimes it is possible to guarantee the continuity of VBVoccupancy.

  In the editing process 3 executed by the editing device 171 described with reference to the flowcharts of FIGS. 47 to 50, it is determined that the encoding process of the bridge clip including the IN point has been correctly completed by the process of step S125. In this case, the encoding process is controlled by the encoder 60 as described with reference to FIG. 45.

  In addition, the VBVoccupancy at the end point of the bridge clip uses the 2-path method that repeats encoding in the same range until the part where re-encoding is not performed and the part where re-encoding is performed continue, thereby improving the continuity of VB Voccupancy. You may make it guarantee.

  Note that the editing apparatus 171 can use the stream generated by the encoder 183 as a part of the edited stream between the IN point and the OUT point so that the encoding process does not overlap. Therefore, the buffer capacity of the frame buffer 184 needs to be 2N + 2 + a + b frames or more. On the other hand, for example, if the encoder 183 performs the baseband signal encoding process independently of the editing process, which encoder performs the encoding process of the overwrite portion between the IN point and the OUT point, There is an effect that the process of changing the editing point after the editing is completed can be executed using the stored encoded stream corresponding to the baseband signal. For example, when the encoding process of the overwrite portion between the IN point and the OUT point is also performed by the encoder 60 as in the first embodiment, the buffer capacity of the frame buffer 184 is the same as that of the first embodiment. It may be the same.

  The series of processes described above can be executed by hardware or can be executed by software. In this case, the processing described above is executed by a personal computer 500 as shown in FIG.

  In FIG. 51, a CPU (Central Processing Unit) 501 performs various processes according to a program stored in a ROM (Read Only Memory) 502 or a program loaded from a storage unit 508 to a RAM (Random Access Memory) 503. Execute. The RAM 503 also appropriately stores data necessary for the CPU 501 to execute various processes.

  The CPU 501, ROM 502, and RAM 503 are connected to each other via an internal bus 504. An input / output interface 505 is also connected to the internal bus 504.

  The input / output interface 505 includes an input unit 506 including a keyboard and a mouse, a display including CRT and LCD, an output unit 507 including a speaker, a storage unit 508 including a hard disk, a modem, a terminal adapter, and the like. A communicator 509 is connected. A communication unit 509 performs communication processing via various networks including a telephone line and CATV.

  A drive 510 is also connected to the input / output interface 505 as necessary, and a removable medium 521 composed of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately mounted, and a computer program read from them is loaded. It is installed in the storage unit 508 as necessary.

  Further, in the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in chronological order according to the described order, but may be performed in parallel or It also includes processes that are executed individually.

  In the present specification, the term “system” represents the entire apparatus constituted by a plurality of apparatuses.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

It is a figure for demonstrating assembly edit. It is a figure for demonstrating insert edit. It is a figure for demonstrating the process in the case of encoding a baseband input independently and producing | generating and editing a 2nd encoding stream. It is a block diagram for demonstrating the structure of the editing apparatus of a 1st example. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating adjustment of the number of frames of GOP containing an OUT point. It is a figure for demonstrating adjustment of the number of frames of GOP containing an OUT point. It is a figure for demonstrating adjustment of the number of frames of GOP containing an OUT point. It is a figure for demonstrating adjustment of the number of frames of GOP containing an OUT point. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a figure for demonstrating the delay time of the input signal to the encoder generate | occur | produced by the buffering by a frame buffer. It is a functional block diagram which shows the function which CPU of the editing apparatus of a 1st example has. 10 is a flowchart for explaining editing processing 1; 10 is a flowchart for explaining editing processing 1; It is a block diagram for demonstrating the structure of the editing apparatus of a 2nd example. It is a functional block diagram which shows the function which CPU of the editing apparatus of a 2nd example has. It is a figure for demonstrating selection of the encoding result. It is a figure for demonstrating the continuity of VBVoccupancy. It is a figure for demonstrating the end position of encoding. It is a figure for demonstrating the GOP phase in the case of encoding baseband image data. It is a figure for demonstrating the end point of the re-encoding range decided by OUT point, and the fitting of VBVoccupancy. It is a figure for demonstrating the end point of the re-encoding range decided by OUT point, and the fitting of VBVoccupancy. It is a figure for demonstrating the end point of the re-encoding range decided by OUT point, and the fitting of VBVoccupancy. It is a figure which shows transition of VBVoccupancy. It is a figure for demonstrating the example of management data. 10 is a flowchart for explaining editing processing 2; 10 is a flowchart for explaining editing processing 2; It is a block diagram for demonstrating the structure of the editing apparatus of the 3rd example. It is a figure for demonstrating the range of the bridge clip in an edit process. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a figure for demonstrating the buffer capacity calculated | required by the frame buffer of FIG. It is a functional block diagram for demonstrating the function which CPU of FIG. 32 has. 10 is a flowchart for explaining editing processing 3; 10 is a flowchart for explaining editing processing 3; 10 is a flowchart for explaining editing processing 3; 10 is a flowchart for explaining editing processing 3; It is a block diagram which shows the structure of a personal computer.

Explanation of symbols

  31 Editing Device, 41 CPU, 43 Memory, 46 HDD, 47 Drive, 48 Recording Media, 52 CPU, 54 to 56 Decoder, 58 Switch / Effect, 59 Frame Buffer, 60 Encoder, 81 Parameter Acquisition Unit, 82 User Input Acquisition Unit , 83 IN point / OUT point determining unit, 84 re-encoding range determining unit, 85 editing process control unit, 91 decoding control unit, 92 # 1 switch control unit, 93 encoding control unit, 94 # 2 switch control unit, 121 CPU, 122 CPU, 141 IN point / OUT point determination unit, 142 Re-encode range determination unit, 143 Edit processing control unit, 144 Edited stream selection unit, 181, 182 CPU, 183 Encoder, 184 Frame buffer, 191 Bridge clip range determination unit 192 editing control unit, 201 the encoding control unit of the baseband signal, 202 the encoding control unit

Claims (21)

In an information processing apparatus that executes editing processing,
Encoding means for encoding baseband image data for each predetermined encoding range;
Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, baseband image data supplied to the encoding means is converted from the first video signal and the first video signal. Switching means for switching between the two video signals;
Of the first video signal encoded by the encoding means, the first video signal is encoded based on an operation input for instructing an edit point by a user referring to the first video signal and the second video signal. After editing, the encoded data in the encoding range that does not include the editing point that is switched from the video signal to the second video signal and that is before the editing point is not selected as the encoded stream after editing. An information processing apparatus comprising: edit data control means for controlling generation of an encoded stream of The first video signal is a baseband video signal obtained by decoding an encoded stream, and the second video signal is a signal input as a baseband video signal. Information processing device. An encoding control means for controlling the encoding process by the encoding means;
The encoding control means includes a re-encoded virtual buffer occupation amount and a non-re-encoded portion at a re-encoding start location and an end location of the encoded stream corresponding to the first video signal. The information processing apparatus according to claim 2, wherein encoding of the first video signal is controlled so that a virtual buffer occupation amount of the first video signal has continuity. The encoding control means includes the encoding range subsequent to the encoding range including the edit point that is switched from the second video signal to the first video signal in the first video signal. The encoding of the first video signal is controlled so that the virtual buffer occupation amount of the re-encoded portion and the virtual buffer occupation amount of the non-re-encoded portion have continuity. Information processing device. An encoding range determining unit that determines a range of encoding processing by the encoding unit;
The encoding range determining means is configured to determine a re-encoded portion after the encoding range following the encoding range including the edit point that is switched from the second video signal to the first video signal. The encoding so that the encoding means can execute the encoding of the first video signal so that the virtual buffer occupancy and the virtual buffer occupancy of the part that has not been re-encoded have continuity. The information processing apparatus according to claim 4, wherein an end position of re-encoding of the first video signal by means is determined. The information processing apparatus according to claim 2, wherein the encoded stream corresponding to the first video signal is accompanied by information on zero stuff for each frame. The encoding control means, based on information about the zero stuff attached to an encoded stream corresponding to the first video signal, from the second video signal out of the first video signal. The virtual buffer occupancy of the re-encoded part by adjusting the zero stuff in the virtual buffer occupancy after the encoding range next to the encoding range including the edit point switched to the first video signal The information processing apparatus according to claim 3, wherein encoding of the first video signal is controlled so that a virtual buffer occupation amount of a portion that is not re-encoded has continuity. In an information processing method of an information processing apparatus that executes editing processing,
Encode baseband image data for each predetermined encoding range,
Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, the baseband image data to be encoded is converted into the first video signal and the second video signal. Switching with
Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, the first video signal from the first video signal among the encoded first video signals The encoded stream after editing is not selected so that the encoded data in the encoding range before the editing point that does not include the editing point switched to the second video signal is not selected as the encoded stream after editing. An information processing method including a step of controlling generation. A program for causing a computer to control editing processing,
Control the process of encoding the baseband image data for each predetermined encoding range,
Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, the baseband image data to be encoded is converted into the first video signal and the second video signal. And control the switching process,
Based on an operation input for instructing an editing point by a user who refers to the first video signal and the second video signal, the first video signal from the first video signal among the encoded first video signals The encoded stream after editing is not selected so that the encoded data in the encoding range before the editing point that does not include the editing point switched to the second video signal is not selected as the encoded stream after editing. A program that causes a computer to execute processing including a step of controlling generation.   A recording medium on which the program according to claim 9 is recorded. In an information processing apparatus that executes editing processing,
First encoding means for encoding baseband image data for each predetermined encoding range;
Based on an operation input for instructing an edit point by a user who refers to the first video signal and the second video signal, baseband image data supplied to the first encoding means is converted into the first video signal. Switching means for switching between the second video signal and the second video signal;
An information processing apparatus comprising: delay means for delaying baseband image data switched by the switching means and supplied to the first encoding means for a predetermined time. The upper limit value of the number of frames included in the predetermined encoding range is N (N is a positive integer),
The delay means uses N + α frame processing time for baseband image data supplied to the first encoding means, where α is the number of frames corresponding to one command delay and the time required for parameter calculation. The information processing apparatus according to claim 11, wherein the information processing apparatus is delayed by an amount of time. The upper limit value of the number of frames included in the predetermined encoding range is N (N is a positive integer),
The delay means sets the baseband image data supplied to the first encoding means as (N−1), where β is the number of frames corresponding to one command delay and the time required for parameter calculation. The information processing apparatus according to claim 11, wherein the information processing apparatus is delayed by a processing time of + β frame. The upper limit value of the number of frames included in the predetermined encoding range is N (N is a positive integer),
The lower limit value of the number of frames included in the predetermined encoding range is N ′ (N ′ is a positive integer),
The delay means sets the baseband image data supplied to the first encoding means as (N + N′−1), where β is the number of frames corresponding to the delay for one command and the time required for parameter calculation. The information processing apparatus according to claim 11, wherein the information processing apparatus is delayed by a processing time of + β frame. The first encoding means is re-encoded with the virtual buffer occupation amount of the re-encoded portion at the re-encoding start location and the end location of the encoded stream corresponding to the first video signal. Until the virtual buffer occupancy of a part that is not present has continuity, the encoding range including the editing point that is switched from the second video signal to the first video signal and the first number of frames following the encoding range. Repeat the encoding of the video signal,
The upper limit value of the number of frames included in the predetermined encoding range is N (N is a positive integer),
The number of the predetermined frames encoded by the first encoding means following the predetermined encoding range is M (M is a positive integer),
The information processing apparatus according to claim 11, wherein the delay unit delays baseband image data supplied to the first encoding unit by a processing time of (N + M + 1) frames. The information processing apparatus according to claim 11, further comprising a second encoding unit that encodes baseband image data corresponding to the first video signal supplied to the first encoding unit. A control means for controlling the encoding process by the first encoding means;
The first encoding unit performs an encoding process of a predetermined section including the edit point based on control by the control unit,
The second encoding unit is a virtual buffer occupation amount obtained as a result of encoding a frame corresponding to a scheduled end point corresponding to a scheduled end point of encoding of the predetermined section encoded by the first encoding unit. And informing the control means of the GOP phase of encoding,
The control means matches the GOP phase of the encoding by the second encoding means based on the notification from the second encoding means, and sets the encoding end scheduled point of the predetermined section. Encoding process by the first encoding unit so that a target value of the virtual buffer occupation amount becomes a virtual buffer occupation amount obtained as a result of encoding the frame corresponding to the scheduled end point by the second encoding unit The information processing apparatus according to claim 16. The upper limit value of the number of frames included in the predetermined encoding range is N (N is a positive integer),
Based on the notification from the second encoding means, the control means corresponds to the sum of the time required to calculate the parameters of the encoding process by the first encoding means and one command delay Let the number of frames be a (a is a positive integer)
The number of frames corresponding to the time taken from when the frame corresponding to the scheduled end point is input to the second encoding unit until the control unit acquires the notification by the second encoding unit is expressed as b (b Is a positive integer)
The information processing apparatus according to claim 17, wherein the delay unit delays baseband image data supplied to the first encoding unit by a processing time of (2N + 2 + a + b) frames. In an information processing method of an information processing apparatus that executes editing processing,
Based on an operation input for instructing an edit point by a user who refers to the first video signal and the second video signal, baseband image data to be encoded is converted into the first video signal and the second video. Switching with the signal,
An information processing method including a step of encoding the baseband image data for each predetermined encoding range after delaying the switched baseband image data for a predetermined time before encoding. A program for causing a computer to control editing processing,
Based on an operation input for instructing an edit point by a user who refers to the first video signal and the second video signal, baseband image data to be encoded is converted into the first video signal and the second video. Control the supply of data to the encoder so that it switches with the signal,
A process including a step of controlling an encoding process so that the baseband image data is encoded for each predetermined encoding range after the switched baseband image data is delayed for a predetermined time before encoding. A program to be executed by a computer.   A recording medium on which the program according to claim 20 is recorded.

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