JP4375278B2 - Optical disk recording device - Google Patents

Description

  The present invention relates to an optical disk recording apparatus for recording data such as video and audio edited using a non-linear editing machine for DV (Digital Video) on an optical disk such as a DVD (Digital Versatile Disk).

  In recent years, an optical disc reproducing apparatus for moving images that reproduces an optical disc on which data such as video and audio is recorded has been developed. This apparatus is generally used for the purpose of viewing video software or enjoying karaoke or the like, such as an LD or a video CD playback apparatus.

  Among them, the DVD standard that uses the internationally standardized MPEG2 (Moving Picture Experts Group Phase 2) system and the AC-3 audio compression system has been proposed.

  On the other hand, in addition to VHS which is a conventional analog method, a digital DV has emerged as a VTR recording method. Many DV-type VTRs and camcorders are equipped with an interface called a DV terminal, and all of video, audio, and control signals can be transmitted with a single cable. It is possible to connect not only between DV devices but also with computers, and the computer can transfer video and audio signals while controlling the DV devices.

  Here, linear editing, which used to copy two VTRs side by side and copied from one to the other, was the mainstream for editing moving images, but in recent years, non-linear editing using a device based on a personal computer (hereinafter referred to as PC) is the mainstream. Has become popular.

  FIG. 13 is a connection diagram between a conventional VTR and a non-linear editing machine. As shown in FIG. 13, the VTR 13 is connected to an NLE (hereinafter referred to as NLE) 1 via a DV cable 14.

  As shown in FIG. 13, the NLE 1 includes a connected device control unit 2, a video / audio input / output unit 3, a compression unit 4, a CPU 5, a memory 6, a bus 7, an interface (I / F) unit 8, The controller 9, the HD controller 10, a hard disk (HDD) 11, and a DV terminal 12 are configured.

  When the video / audio data recorded on the video tape by the VTR 13 is edited by the NLE1, the video / audio data is taken into the NLE1. At this time, the user plays the video tape of the VTR 13 and searches for a point to start capturing and a point to end. When the user inputs a start point (IN point) and an end point (OUT point) using the controller 9, the CPU 5 stores the time code in the memory 6.

  And NLE1 starts taking in. First, the VTR is cued to the start time code. The cueing is executed by the CPU 5 sending a command from the connected device control unit 2 to the VTR 13 via the DV terminal 12.

  Next, pre-rolling is performed to rewind the video tape for a few seconds, and VTR playback is started. Pre-roll and start of reproduction are executed by the CPU 5 sending a command from the connected device control unit 2 to the VTR 13 via the DV terminal 12.

  The CPU 5 reads out the time code being reproduced through the connected device control unit 2, and starts taking in when the time code at the start point is reached. When capturing is started, the video / audio signal output from the VTR 13 is sent from the DV terminal 12 to the compression unit 4 via the video / audio input / output unit 3 and compressed. The CPU 5 reads the compressed data into the memory 6 via the bus 7 and records it on the hard disk 11 via the HD control unit 10.

  The CPU 5 continues to read the time code being reproduced, and when the end time code is reached, the capturing is terminated.

  The user uses the controller 9 to edit the audio / video data recorded on the hard disk 11. The CPU 5 sends the editing instruction input from the controller 9 to the hard disk 11 via the HD control unit 10 and executes editing of the recorded video / audio data.

  The edited video / audio data can be written back to the VTR. When the user inputs a start point and an end point using the controller 9, the CPU 5 stores the time code in the memory 6. Then, the CPU 5 starts playback of the VTR by sending a command from the connected device control unit 2 to the VTR 13 via the DV terminal 12.

  The CPU 5 reads the time code being reproduced through the connected device control unit 2 and starts writing back when the time code at the start point is reached. When writing back is started, the edited video / audio signal recorded on the hard disk 11 is output from the video / audio input / output unit 3 to the VTR 13 via the DV terminal 12. The CPU 5 finishes writing back when it reaches the end time code.

In this way, the NLE is connected to the VTR via the DV terminal, and while the VTR is controlled by an instruction from the NLE, the material recorded on the video tape is taken into the NLE side or the edited content is taken to the VTR. It is possible to write back to the side.
JP-A-5-36250

  In recent years, with the widespread use of optical discs, there has been an increasing demand for recording content that has been edited by NLE onto optical discs.

  One method for realizing this is to incorporate a recordable optical disc drive and software for creating information to be recorded on the optical disc into the NLE.

  However, although improvements have been made gradually, such as the one that emphasizes linkage with NLE, etc., it has been gradually improved, but it is difficult to operate because there are many settings, and it takes too much time to perform various processes with software alone. Moreover, there is still a problem that the operation often becomes unstable due to the consumption of resources.

  Further, if it becomes possible to connect the DV NLE and the optical disk recording apparatus with a DV terminal, it becomes possible to easily produce a high-quality optical disk.

  However, the DV terminal is originally an interface for DV equipment using a tape as a medium, and it is not assumed that the optical disk recording apparatus is connected or controlled. Therefore, the actual situation is that it is impossible to cope with the control of the optical disc recording apparatus on the DV NLE side.

  Here, the reasons why the optical disc recording apparatus cannot be operated with the conventional DV NLE will be summarized.

(1) An optical disk (DVD or the like) is a random access device, and DV is an access device sequentially.

(2) There is no concept of time code (TTC) or absolute track number (ATN) in an optical disk (DVD or the like).

(3) The NLE searches the DV for an IN point (recording start point) based on the time code and absolute track number on the IEEE (Institute of Electrical and Electronics Engineers) 1394 packet.

  For the above reasons, it is impossible to operate the optical disk recording apparatus with NLE designed for DV and record on the optical disk (see, for example, Patent Document 1).

  Accordingly, there has been a demand for developing an optical disc recording apparatus capable of easily recording data such as video and audio edited using DV NLE on an optical disc such as a DVD.

  The present invention has been made in view of the above, and realizes control from a conventional NLE having a control function of DV equipment, with stable operation unique to dedicated hardware, high-speed processing, high-quality finish, simple operation, An object of the present invention is to provide an optical disc recording apparatus capable of easily recording content created by NLE on an optical disc.

  An optical disk recording apparatus according to the present invention is an optical disk recording apparatus for transferring a video / audio signal to / from an optical disk by transmitting / receiving a video / audio signal to / from a non-linear editing machine having a DV terminal, the control command from the non-linear editing machine Control command analysis means for receiving and analyzing, a mode means for generating a virtual mode based on an analysis result in the control command analysis means, a time code generator means for generating a virtual time code corresponding to the virtual mode, Absolute track number generator means for generating a virtual absolute track number corresponding to the virtual mode, and outputting the virtual mode, the virtual time code, and the virtual absolute track number in response to a status sense command from the nonlinear editor The And a virtual playback signal generating means for generating a pseudo playback signal to be output to the non-linear editor when the virtual mode is a playback system, and a video and audio signal from the non-linear editor when the virtual mode is a recording system. Stream data input / output switching means for inputting a signal to record a video / audio signal on an optical disc and outputting the pseudo reproduction signal to the nonlinear editing machine when the virtual mode is a reproduction system.

  According to the optical disk recording apparatus of the present invention, the virtual mode is generated based on the control command from the nonlinear editor, the virtual time code and the virtual absolute track number corresponding to the virtual mode are generated, and the status sense from the nonlinear editor is generated. In response to the command, the virtual mode, virtual time code and virtual absolute track number are output to the nonlinear editing machine. When the virtual mode is the recording system, the video / audio signal is input from the nonlinear editing machine and the video / audio signal is recorded on the optical disc. However, when the virtual mode is the playback system, a pseudo playback signal is output to the non-linear editing machine, so that the conventional NLE having a DV device control function can control the optical disk recording device, and stable operation unique to dedicated hardware. The high-speed processing, high-quality finish, and simple operation make the code created with NLE Ceiling can be easily recorded on the optical disc.

  Also, by replacing the other end of the DV cable connected to the NLE with the VTR and the optical disk recording device, the same content can be written to two different media by the same operation.

  The best mode for carrying out the optical disk recording apparatus of the present invention will be described below with reference to the drawings.

  FIG. 1 is a connection diagram between an optical disk recording apparatus and a non-linear editing machine according to an embodiment of the present invention. As shown in FIG. 1, the optical disc recording apparatus 15 according to the present embodiment is connected to the NLE 1 via a DV cable 14. The non-linear editing machine 1 has the same configuration as the conventional non-linear editing machine 1 shown in FIG. 13, and performs the same operation.

  The DV cable 14 is configured by an IEEE 1394 serial bus. When performing data transmission via the IEEE 1394 serial bus, the isochronous transfer mode used for real-time transmission of relatively large amounts of video data, audio data, etc., still images, text data, control commands, etc. Asynchronous transfer modes are used for reliable transmission, and a dedicated band is used for transmission for each mode.

  For devices connected via the IEEE 1394 serial bus, AV / C commands (AV / C Digital Interface Command Set) are defined as commands for controlling the devices.

  Here, FIG. 2 shows an example of the data structure of a packet when stream data is transmitted in the isochronous transfer mode via the IEEE 1394 serial bus.

  In FIG. 2, packets are shown in units of 1 quad red (1 quadlet = 32 bits). The first 2-quadred section is a header of an isochronous packet, and an error correction code CRC of these data is arranged together with data such as a data length, a tag, and a channel. The next 2-quadred section is called a CIP header, and is a header arranged when audio data or video data is transmitted. In this CIP header, the SID that is the node ID of the data transmission source (source device), the unit DBS of packetization of stream data, the division number FN before packetization, the number of quad reds QPC added at the time of data division, A flag SPH in the packet header of the source device, a packet loss detection counter DBC, an FMT that is the signal format ID, and the like are arranged.

  Other data corresponding to the format of stream data transmitted by isochronous packets may be arranged in the CIP header. For example, data of sampling frequency of audio data and data of a flag (N flag) indicating that rate control is being performed may be arranged. Following the CIP header configured in this manner, stream data having a predetermined data amount is arranged. An error correction code CRC is arranged at the end of the packet.

  Although stream data is transmitted in such a data structure, control packets such as commands and responses can be transmitted in the asynchronous transfer mode between devices connected via the IEEE 1394 serial bus. In the present embodiment, it is possible to control the optical disk recording device 15 and judge the state by using AV / C commands defined as commands for controlling devices connected via the IEEE 1394 serial bus. It is. Data used in the AV / C command will be described below.

  FIG. 3 shows the data structure of a packet when a command or response is transmitted as an AV / C command. In this AV / C command, the command and response are transmitted in the asynchronous transfer mode. The AV / C command is a command set for controlling the AV device, and CTS (command set ID) = “0000”. In order not to put a burden on the bus and AV equipment, the response to the command is performed within 100 ms. The packets shown in FIG. 3 are also shown in units of 1 quadred. The first five quad red sections are the header part of the packet, and the remaining part is the data block.

  The destination ID in the header part indicates the destination. CTS indicates the ID of the command set. In the AV / C command set, CTS = “0000”. The ctype / response field indicates the function classification of the command when the packet is a command, and indicates the processing result of the command when the packet is a response.

  The commands are broadly divided into (1) a command for controlling the function from the outside (CONTROL), (2) a command for inquiring the state from the outside (STATUS), and (3) a command for inquiring from outside whether or not the control command is supported (GENERAL INQUIRY). Four types are defined: (whether or not opcode is supported), SPECIFIC INQUIRY (whether or not opcode and operands are supported), and (4) a command (NOTIFY) that requests a change in state.

  Responses are returned according to the type of command. Responses to the CONTROL command include NOT IMPLEMENTED (not implemented), ACCEPTED (accept), REJECTED (reject), and INTERIM (provisional response). Responses to the STATUS command include NOT INPLEMENTED, REJECTED, IN TRANSITION (in transition), and STABLE (stable). Responses to GENERAL INQUIRY and SPECIFIC INQUIRY commands include IMPLEMENTED (implemented) and NOT IMPLEMENTED. Responses to the NOTIFY command include NOTIMPLEMENTED, REJECTED, INTERIM, and CHANGED (changed). Note that commands and responses other than those shown here may be defined.

  The subunit type (subunit type) is provided to specify the function in the device, and for example, tape recorder / player, tuner, etc. are assigned. In order to determine when there are a plurality of subunits of the same type, addressing is performed with a unit id as a determination number. “opcode” represents a command, and “operand” represents a parameter of the command. Additional operands are fields that are added as necessary. Padding is also a field added as necessary. A data CRC (Cyclic Redundancy Check) is an error correction code used for error checking during data transmission.

  FIG. 4 shows a specific example of the AV / C command. FIG. 4A shows a specific example of ctype / response. The upper part of the figure represents a command, and the lower part of the figure represents a response. “0000” is assigned CONTROL, “0001” is assigned STATUS, “0010” is assigned SPECIFIC INQUIRY, “0011” is assigned NOTIFY, and “0100” is assigned GENERAL INQUIRY. “0101 to 0111” are reserved for future specifications. “1000” is NOT INPLEMENTED, “1001” is ACCEPTED, “1010” is REJECTED, “1011” is IN TRANSITION, “1100” is IMPLEMENTED / STABLE, “1101” is CHNGED, “1111” "INTERIM" is assigned to "." “1110” is reserved for future specifications.

  FIG. 4B shows a specific example of the subunit type. “00000” is a Video Monitor, “00011” is a disk recorder / player, “00100” is a tape recorder / player, “00101” is a Tuner, “00111” is a VideoCamera, “11100” is a Vendor unique, “11110” is assigned Subunit_type extension. Note that “11111” is assigned a unit, but this is used when it is sent to the device itself, and includes, for example, turning on and off the power.

  FIG. 4C shows a specific example of opcode. There is an opcode table for each subunit type, and here, the opcode is shown when the subunit type is Tape recorder / Player. An operand is defined for each opcode. Here, DIRECT SELECT INFORMATION TYPE is assigned to “C8h”, DIRECT SELECT DATA is assigned to “CBh”, CA ENABLE is assigned to “CCh”, and TUNER STATUS is assigned to “CDh”.

  Using the AV / C command defined in this way, the devices connected to the bus are controlled, and data transmission is performed between the devices connected via the bus based on the control. It should be noted that the commands, responses, and subunit types shown in FIG. 4 are only representative and other types are also defined, and other commands and subunit types are defined as undefined values in the future. May be defined.

  FIG. 5 is a block diagram showing an optical disk recording apparatus according to an embodiment of the present invention. As shown in FIG. 5, the optical disc recording apparatus 15 includes a control circuit 21, a signal processing unit 30, a stream data input / output switching unit 31, an input stream data processing unit 32, an output stream data processing unit 33, a pseudo The reproduction signal generator 34, the DVD recorder 35, and the DV terminal 36 are included.

  The control circuit 21 includes a control system processing unit 22, a control command analysis unit 23, an ImaginaryMode generation unit 24, a RealMode determination unit 25, a Status command response unit 26, a ModeStatus generation unit 27, and an ImaginaryTTC generation unit 28. And an ImaginaryATN generator 29. The stream data input / output switching unit 31 includes terminals 31a to 31c. When the terminals 31a to 31b are connected, the signal processing unit 30 and the input stream data processing unit 32 are connected, and the terminals 31a to 31c are connected. When connected, the signal processing unit 30 and the output stream data processing unit 33 are connected.

  The NLE 1 and the optical disk recording device 15 are connected by a DV cable 14, and video, audio, and control signals are overlapped and transmitted. Among these signals, the control signal transmitted in the asynchronous transfer mode is separated and input by the control system processing unit 22, and the video and audio signals transmitted in the isochronous transfer mode are separated and input by the signal system processing unit 30. The

  Focusing only on control communication input / output, it is exactly the same as a real DV device. Therefore, the NLE 1 can also control the optical disk recording device 15 by performing the control for the VTR. The control circuit 21 controls the DVD recorder 35 in accordance with the optical disk recording apparatus command received from the NLE 1.

  Hereinafter, connecting the NLE 1 for DV to the optical disc recording device 15 and controlling the operation of the optical disc recording device 15 from the NLE 1 is referred to as DV emulation.

  When receiving the DV control command, the control processing unit 22 first selects a corresponding command sequence from the optical disc command sequence list. Although the VTR and the optical disk recording device 15 are similar in function, their structures are greatly different, and the optical disk recording device 15 cannot be controlled simply by returning a command. Therefore, in this command sequence, in addition to the optical disk command corresponding to the DV device command, the optical disk unique command necessary before and after the command, and information such as the execution order and timing are also included.

  The control command analysis unit 23 receives and analyzes device control commands (PLAY, STOP, REC, etc.) of AV / C commands from the NLE 1 via the control system processing unit 22 and outputs the analysis results to the ImaginaryMode generation unit 24. To do. Further, the control command analysis unit 23 manages the execution order based on the command sequence selected by the control system processing unit 22.

  The ImaginaryMode generating unit 24 generates ImaginaryMode based on the analysis result input from the control command analyzing unit 23, and the RealMode discriminating unit 25, ModeStatus generating unit 27, ImaginaryTTC generating unit 28, ImaginaryATN generating unit 29, and stream data input / output switching. To the unit 31. ImaginaryMode is a virtual mode set from device control commands (PLAY, STOP, REC, etc.) of AV / C commands when performing DV emulation.

  The RealMode discriminating unit 25 determines whether the ImaginaryMode input from the ImaginaryMode generating unit 24 is a recording command or a reproduction command, and if it is a recording command, transmits it to the DVD recorder 35. FIG. 6 is a diagram illustrating processing of the RealMode determination unit 25. If ImaginaryMode is REC (recording) or STOP (stop), RealMode is the same as ImaginaryMode, and RealMode discrimination unit 25 transmits RealMode to DVD recorder 35. If the ImaginaryMode is other than REC or STOP, the RealMode discrimination unit 25 outputs nothing.

  The ModeStatus generating unit 27 determines whether ImaginaryMode is a recording command or a playback command, and adopts the status of the DVD recorder 35 if it is a recording command, and adopts ImaginaryMode as the status if it is a playback command. Output to the command response unit 26.

  The ImaginaryTTC generator 28 generates an ImaginaryTTC that matches the ImaginaryMode. FIG. 7 is a diagram showing processing of the ImaginaryTTC generation unit 28. When ImaginaryMode is REC (recording) or PLAY (playback), increment once per frame. When double speed (× 2), increment twice per frame. When quadruple speed (× 4), one frame. In addition, the process is performed in such a manner that the process is incremented four times and no process is performed in the case of STOP (stop), and the generated ImaginaryTTC is output to the Status command response unit 26.

  The ImaginaryATN generating unit 29 generates an ImaginaryATN that matches the ImaginaryMode. FIG. 8 is a diagram illustrating processing of the ImaginaryATN generation unit 29. When ImaginaryMode is REC (recording) or PLAY (playback), it is incremented 10 times per frame. When it is double speed (× 2), it is incremented 20 times per frame. When it is quadruple speed (× 4), it is 1 frame. The process is incremented 40 times and no process is performed when STOP (stop), and the generated ImaginaryATN is output to the Status command response unit 26. Note that the number of increment processes is the case where the video signal to be transmitted is the NTSC (National Television Standard Committee) system, and in the case of the PAL (Phase Alternation by Line) system, they are 12, 24, and 48 times, respectively.

  When the control command analysis unit 23 receives a status sense command (mode, TTC, ATN sense) from the NLE 1, the Status command response unit 26 responds to each by receiving a ModeStatus generation unit 27, an ImaginaryTTC generation unit 28, and an ImaginaryATN generation unit. The ImaginaryMode, ImaginaryTTC, and ImaginaryATN input from 29 are output to the DV terminal 36 via the control system processing unit 22.

  The stream data input / output switching unit 31 inputs stream data from the DV terminal 36 if the ImaginaryMode is a recording system, and outputs the stream data to the DV terminal 36 if it is a reproduction system. FIG. 9 is a diagram illustrating processing of the stream data input / output switching unit 31. If the ImaginaryMode is REC or STOP, the stream data input / output switching unit 31 connects the terminals 31a to 31b, and processes the stream data transmitted from the NLE1 from the DV terminal 36 via the signal processing unit 30 to the input stream data processing. To the unit 32. If ImaginaryMode is PLAY, terminals 31a-31c are connected, and the black burst signal generated by the pseudo reproduction signal generator 34 is output from the output stream data processor 33 to the DV terminal 36 via the signal processor 30. .

  The input stream data processing unit 32 converts the DV-compressed stream data input from the stream data input / output switching unit 31 into a general REC656 signal and outputs the signal to the DVD recorder 35.

  The output stream data processing unit 33 converts the general REC 656 signal input from the pseudo reproduction signal generation unit 34 into a DV stream and outputs the DV stream to the stream data input / output switching unit 31.

  The pseudo reproduction signal generation unit 34 generates a black burst signal that is output when ImaginaryMode is a reproduction system, and outputs the black burst signal to the output stream data processing unit 33.

  Next, the DV emulation operation in the optical disk recording device 15 will be described with reference to FIGS. 10 to 12 are diagrams showing an example of a command sequence for performing a write-back operation from the NLE 1 to the optical disc recording device 15. This command sequence is stored in the memory 6 provided in the NLE 1.

  First, in step S10, the NLE 1 finishes editing the moving image captured from the VTR 13 to the HDD 11. Thereafter, in step S20, the other end of the DV cable 14 connected to the NLE 1 is replaced by the VTR 13 and connected to the optical disc recording device 15, and execution of writing back the edited moving image from the NLE 1 to the optical disc recording device 15 is started. .

  In step S30, the CPU 5 of the NLE 1 issues a 20 times search command from the connected device control unit 2 to the optical disc recording device 15 via the DV terminal 12.

  In step S40, the 20 times search command is input to the control command analysis unit 23 via the control system processing unit 22 and analyzed, and the ImaginaryMode generation unit 24 sets the ImaginaryMode to 20 times search. This ImaginaryMode is input from the ImaginaryMode generation unit 24 to the ImaginaryTTC generation unit 28, the ImaginaryATN generation unit 29, the stream data input / output switching unit 31 and the like, and the ImaginaryTTC and the ImaginaryATN step by 20 frames.

  Further, the black burst signal generated by the pseudo reproduction signal generator 34 is converted from a general REC656 signal to a DV stream by the output stream data processing unit 33, and the signal system is connected to terminals 31a-31c of the stream data input / output switching unit 31. The signal is output to the DV terminal 36 via the processing unit 30.

  Next, in step S <b> 50, the CPU 5 issues a status sense from the connected device control unit 2. In step S60, the ModeStatus generating unit 27 adopts ImaginaryMode (20 times search here) as the status because ImaginaryMode is a reproduction system command, and the Status command response unit 26 outputs ImaginaryMode to NLE1.

  Next, in step S70, the connected device control unit 2 of the NLE 1 receives ImaginaryMode (20 times search) as a status, and the CPU 5 recognizes that the optical disk recording device 15 has made a 20 times search.

  Next, in step S <b> 80, the CPU 5 issues a time code sense from the connected device control unit 2. In step S90, the Status command response unit 26 receives the ImaginaryTTC from the ImaginaryTTC generation unit 28 and outputs it to the NLE1. In step S100, the CPU 5 recognizes that the optical disk recording device 15 is roughly approaching the IN point.

  Next, in step S <b> 110, the CPU 5 issues a playback (PLAY) command from the connected device control unit 2.

  In step S120, the playback command is input to the control command analysis unit 23 via the control system processing unit 22 and analyzed, and the ImaginaryMode generation unit 24 sets the ImaginaryMode to playback. This ImaginaryMode is input from the ImaginaryMode generation unit 24 to the ImaginaryTTC generation unit 28, the ImaginaryATN generation unit 29, the stream data input / output switching unit 31 and the like, and the ImaginaryTTC and the ImaginaryATN step by 20 frames.

  Further, the black burst signal generated by the pseudo reproduction signal generator 34 is converted from a general REC656 signal to a DV stream by the output stream data processing unit 33, and the signal system is connected to terminals 31a-31c of the stream data input / output switching unit 31. The signal is output to the DV terminal 36 via the processing unit 30.

  Next, in step S130, the CPU 5 issues a status sense from the connected device control unit 2. In step S140, the ModeStatus generation unit 27 adopts (reproduced here) as the status, and the Status command response unit 26 outputs ImaginaryMode to NLE1.

  Next, in step S150, the connected device control unit 2 of the NLE 1 receives ImaginaryMode (reproduction) as a status, and the CPU 5 recognizes that the mode of the optical disk recording device 15 has been reproduced.

  Next, in step S160, the CPU 5 issues a time code sense from the connected device control unit 2. In step S170, the Status command response unit 26 receives ImaginaryTTC from the ImaginaryTTC generation unit 28, and outputs it to NLE1. In step S180, the CPU 5 recognizes that the optical disk recording device 15 is approaching the IN point.

  Next, in step S190, the CPU 5 issues a still command from the connected device control unit 2.

  In step S200, the still command is input to the control command analysis unit 23 via the control system processing unit 22 and analyzed, and the ImaginaryMode generation unit 24 sets ImaginaryMode as still. This ImaginaryMode is input from the ImaginaryMode generation unit 24 to the ImaginaryTTC generation unit 28, the ImaginaryATN generation unit 29, etc., and the ImaginaryTTC and the ImaginaryATN stop moving.

  Next, in step S <b> 210, the CPU 5 issues a frame advance command from the connected device control unit 2.

  In step S220, the frame advance command is input to the control command analyzer 23 through the control system processor 22 and analyzed, and the ImaginaryMode generator 24 sets ImaginaryMode to frame advance. This ImaginaryMode is input to the ImaginaryTTC generator 28, the ImaginaryATN generator 29, etc., and the ImaginaryTTC and ImaginaryATN are incremented by one frame.

  Next, in step S230, the CPU 5 issues a time code sense from the connected device control unit 2. In step 240, the Status command response unit 26 receives ImaginaryTTC from the ImaginaryTTC generation unit 28 and outputs it to NLE1. In step S250, the CPU 5 recognizes that the optical disk recording device 15 has reached the IN point.

  Next, in step S260, the CPU 5 issues a record (REC) command from the connected device control unit 2.

  In step S270, the recording command is input to the control command analysis unit 23 via the control system processing unit 22 and analyzed, and the ImaginaryMode generation unit 24 sets the ImaginaryMode to recording. This ImaginaryMode is input from the ImaginaryMode generation unit 24 to the RealMode discrimination unit 25, ImaginaryTTC generation unit 28, ImaginaryATN generation unit 29, stream data input / output switching unit 31 and the like, and ImaginaryTTC and ImaginaryATN step.

  The stream data input / output switching unit 31 is connected to terminals 31a-31b. The edited moving image data recorded on the hard disk 11 of the NLE 1 is output from the video / audio input / output unit 3 via the DV terminal 12, and the DV terminal 36, the signal system processing unit 30, and the stream data of the optical disk recording device 15 are output. The data is input to the input stream data processing unit 32 via the terminals 31a-31b of the input / output switching unit 31.

  Next, in step S280, the RealMode determination unit 25 issues a recording start to the DVD recorder 35 because the ImaginaryMode input from the ImaginaryMode generation unit 24 is recording. In step S290, the input stream data processing unit 32 converts the DV-compressed stream data signal input from the stream data input / output switching unit 31 into a general REC656 signal and outputs the signal to the DVD recorder 35. The recorder 35 starts recording. At the same time, the status becomes a record.

  Next, in step S300, since the status of the DVD recorder 35 is the recording system, the ModeStatus generator 27 adopts the status from the DVD recorder 35 as the status for the inquiry from the NLE 1 and outputs it to the Status command response unit 26.

  Next, in step S <b> 310, the CPU 5 issues a status sense from the connected device control unit 2. In step S320, the Status command response unit 26 outputs the status (recording) from the DVD recorder 35 to the NLE 1 as the status. In step S330, the CPU 5 recognizes that the mode of the optical disk recording device 15 is recording.

  Next, in step S340, the CPU 5 issues a STOP command from the connected device control unit 2 when the OUT point of the write-back content is reached.

  In step S350, the STOP command is input to the control command analysis unit 23 via the control system processing unit 22 and analyzed, and the ImaginaryMode generation unit 24 sets ImaginaryMode to STOP. This ImaginaryMode is input from the ImaginaryMode generation unit 24 to the ImaginaryTTC generation unit 28, the ImaginaryATN generation unit 29, etc., and the ImaginaryTTC and the ImaginaryATN stop moving.

  Next, in step S360, the RealMode determination unit 25 issues a stop to the DVD recorder 35 because the ImaginaryMode input from the ImaginaryMode generation unit 24 is STOP. In step S370, the DVD recorder 35 stops recording and the status is stopped.

  Next, in Step S380, since the status of the DVD recorder 35 is the recording system, the ModeStatus generating unit 27 adopts the status from the DVD recorder 35 as the status for the inquiry from the NLE 1 and outputs it to the Status command response unit 26.

  Next, in step S390, the CPU 5 issues a status sense from the connected device control unit 2. In step S400, the Status command response unit 26 outputs the status (stopped) from the DVD recorder 35 to the NLE 1 as the status. In step S410, the CPU 5 recognizes that the mode of the optical disk recording device 15 has been stopped.

  As described above, the optical disc recording apparatus according to the present embodiment includes the ImaginaryMode generation unit 24, the ImaginaryTTC generation unit 28, and the ImaginaryATN generation unit 29. The optical disk recording device 15 returns ImaginaryMode, ImaginaryTTC, and ImaginaryATN in response to status sense, time code inquiry, and absolute track number inquiry from NLE1, respectively, and sends it with an AV / C command. Since the stream data input / output switching unit 31 is switched depending on whether the selected mode is a recording system or a playback system, the stream data sent from the NLE 1 is input in the recording system, and the black burst signal is output in the playback system. NLE1 has the illusion that it is operating with a DV device connected. It performs a work or the like, it is possible to perform normal write-back operation.

  In addition, by replacing the other end of the DV cable 14 connected to the NLE 1 with the VTR 13 and the optical disk recording device 15, the same content can be written to two different media by the same operation.

  Although the present embodiment has been described using a DVD recorder, the gist of the present invention is applicable to other storage devices that do not have the concept of time code.

1 is a connection diagram between an optical disc recording apparatus and a non-linear editing machine according to an embodiment of the present invention. It is a figure which shows the example of a packet structure of isochronous transfer mode. It is a figure which shows the structural example of the data transmitted with an AV / C command. It is a figure which shows the specific example of an AV / C command, (a) is a figure which shows the specific example of ctype / response, (b) is a figure which shows the specific example of unit type, (c) shows the specific example of opcode. FIG. 1 is a block diagram showing an optical disc recording apparatus according to an embodiment of the present invention. It is a figure which shows the process of the RealMode discrimination | determination part. It is a figure which shows the process of an ImaginaryTTC production | generation part. It is a figure which shows the process of an ImaginaryATN production | generation part. It is a figure which shows the process of a stream data input / output switching part. FIG. 5 is a diagram (part 1) illustrating an example of a command sequence for performing a write-back operation from a non-linear editing machine to an optical disc recording apparatus. FIG. 11 is a second diagram illustrating an example of a command sequence for performing a write-back operation from the nonlinear editing machine to the optical disc recording apparatus. FIG. 11 is a third diagram illustrating an example of a command sequence for performing a write-back operation from the nonlinear editing machine to the optical disc recording apparatus. It is a connection diagram of a conventional VTR and a nonlinear editing machine.

Explanation of symbols

1 Non-linear editing machine (NLE)
2 connected device control unit 3 video / audio input / output unit 4 compression unit 5 CPU
6 Memory 7 Bus 8 Interface (I / F) Unit 9 Controller 10 HD Control Unit 11 Hard Disk (HDD)
12, 36 DV terminal 13 VTR
DESCRIPTION OF SYMBOLS 14 DV cable 15 Optical disk recording device 21 Control circuit 22 Control system processing part 23 Control command analysis part 24 ImaginaryMode generation part 25 RealMode discrimination part 26 Status command response part 27 ModeStatus generation part 28 ImaginaryTTC generation part 29 ImaginaryATN generation part 30 Signal system processing part 31 Stream Data Input / Output Switching Unit 32 Input Stream Data Processing Unit 33 Output Stream Data Processing Unit 34 Pseudo Playback Signal Generation Unit 35 DVD Recorder

Claims (1)

An optical disc recording apparatus for transferring a video / audio signal to / from a nonlinear editing machine having a DV terminal and recording the video / audio signal on an optical disc,
Control command analysis means for receiving and analyzing control commands from the non-linear editing machine;
Mode means for generating a virtual mode based on the analysis result in the control command analysis means;
Time code generator means for generating a virtual time code corresponding to the virtual mode;
Absolute track number generator means for generating a virtual absolute track number corresponding to the virtual mode;
Status command response means for outputting the virtual mode, the virtual time code and the virtual absolute track number in response to a status sense command from the non-linear editor;
Pseudo reproduction signal generating means for generating a pseudo reproduction signal to be output to the nonlinear editor when the virtual mode is a reproduction system;
When the virtual mode is a recording system, a video / audio signal is input from the nonlinear editor and the video / audio signal is recorded on an optical disk. When the virtual mode is a playback system, the pseudo reproduction signal is output to the nonlinear editor. An optical disk recording apparatus comprising: stream data input / output switching means for performing

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