JP5050588B2 - Disk device and reproducing method - Google Patents

Description

  The present invention relates to a disk device and a reproducing method, and more particularly to a disk device having a fast-forward function in a reproducing operation and a reproducing method.

Conventionally, fast-forward playback has been one of the special playback functions of disk playback devices. For example, Patent Document 1 shows a configuration in which the playback speed can be adjusted. Specifically, the recording time length information for each chapter of the content to be played back is acquired from the content recorded on a DVD (Digital Versatile Disc), HD (Hard Disc), etc. in the content playback device, and the acquired information The playback speed is calculated based on the playback time defined in advance according to the recording time length and the like, and playback control according to the calculated playback speed can be performed.
JP 2006-196052 A

  According to the configuration of Patent Document 1, the playback speed can be determined for the entire content, and the playback speed can be controlled in units of chapters. However, when data is recorded on the disc, a recording format according to the user's desire is specified, and thus speed adjustment in consideration of the recording format is necessary.

  This is because, for example, data recorded in accordance with the + VR (Video Recording) format and data recorded in accordance with the Video format are compatible, but on the other hand, when data is recorded on a DVD in accordance with the + VR format. In order to reduce the burden at the time of recording, control information for reproducing the content is simplified and recorded. For this reason, the amount of search information required for fast-forward playback of content recorded on a DVD is small compared to search information recorded according to the Video format, and it is difficult to adjust fast-forward at a desired speed.

  This problem will be described with reference to FIG. FIG. 8 schematically shows the control information recorded on, for example, a DVD. The control information includes data 71, 72, 73 and search information. This search information is referred to in fast-forward playback. Data 71 to 73 are data recorded in common in the recording operation according to both the + VR format and the Video format, and details thereof will be described later.

  In the case of the video format as the search information, 0.5 seconds, 1 second, 1.5 seconds,..., 7.5 seconds after 0.5 seconds from the currently reproduced VOBU (Video Object Unit). A plurality of pieces of information 61 indicating the address of the VOBU to be reproduced next at intervals of 5 seconds 61 of the VOBU to be reproduced next, such as 10 seconds, 30 seconds, 60 seconds and 2 minutes later Information 62, 63, 64 and 65 indicating the address is recorded. Therefore, at the time of fast-forward reproduction of data according to the Video format, fast-forward reproduction according to a desired speed can be performed by using the search information.

  On the other hand, as search information recorded according to the + VR format, 0.5 second, 1 second, 1.5 seconds,... Only a plurality of pieces of information 61 indicating the address of the VOBU to be reproduced next is recorded, and the amount and type of information are small compared to the search information of the video format. Therefore, at the time of fast-forward playback of data according to the + VR format, fast-forward playback becomes difficult depending on the desired speed.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disc apparatus and a reproducing method capable of fast-forwarding and reproducing information recorded on a disc at a desired speed regardless of the recording format.

  Still another object of the present invention is to provide a disc apparatus and a reproducing method capable of adjusting fast-forwarding at a desired speed when fast-forwarding and reproducing recorded information according to the + VR format.

  In the present specification, the reproduction speed is indicated by the amount of data reproduced (read) from the disc per unit time. In normal reproduction, data is reproduced at a speed specified in advance, and data is not skipped (the previous data is not read without reading some data). On the other hand, in fast forward playback, the amount of data read out per unit time is made larger than in normal playback. For this purpose, data is skipped. When the amount of data skipped per unit time is large, the fast-forward playback speed increases. When the amount of data skipped per unit time is small, the fast-forward playback speed decreases.

  According to one aspect of the present invention, a disc device that reproduces content from a disc on which content comprising a plurality of video units including video data and control information related to the video data is recorded has the following characteristics: .

  When a fast-forward instruction is input during normal playback of the content, a fast-forward time detection unit that detects the normal playback time of the video data amount to be fast-forwarded based on the input fast-forward instruction, and normal when the fast-forward instruction is input Fast forward based on the unit time detector that detects the time required for normal playback of video data in the video unit being played, the normal playback time detected by the fast forward time detector, and the time detected by the unit time detector A unit number detection unit for detecting the number of video units constituting the amount of video data to be detected, an address read from the disk of the video unit of the video data being normally played when a fast-forward instruction is input, and unit number detection Based on the number detected by the recording unit, the video data to be reproduced next is recorded on the disc of the video unit. Comprising an address detector for detecting a next order address pointing to less, and a search output section for reading and outputting image data to be reproduced next order by searching the disk based on the detected next order address.

The control information includes start time data for starting normal playback of related video data and end time data for ending normal playback, and the unit time detection unit normally outputs when a fast-forward instruction is input. The time required for normal playback of the video data of the video unit of the video data being played back is detected based on the start time data and end time data of the control information in the video unit.
The disc has a recording area corresponding to each of the plurality of video units and stores an address in the disc of the video unit, and each address of the recording area corresponds to the address when content is played back. It is indicated by the order data indicating the order in which the video data in the video unit is to be reproduced.

  The address detection unit searches the recording area based on the address read from the disk of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the order data indicating the searched address Based on the number detected by the unit number detection unit, the order data of the video unit of the video data to be reproduced next is calculated, the recording area is searched based on the calculated order data, and the address indicated by the order data Is retrieved as the next address.

  The disc has an address area in which an address in which an address in the disc of the video unit of the predetermined video data to be played back is recorded when a fast forward instruction is input during normal playback is recorded, When it is detected that the order data calculated by the search unit is not valid, the address read from the address area is given to the search output unit as the next address, and the address detected by the address detection unit is the content on the disc. When it is detected that an address outside the recorded area is designated, reading of the video data from the disc based on the fast-forward instruction is terminated.

  The recording format of the content on the disc indicates the + VR format or the Video format.

  According to another aspect of the present invention, a disc device for reproducing content from a disc on which content composed of a plurality of video units including video data and control information related to the video data is recorded has the following characteristics.

  When a fast-forward instruction is input during normal playback of the content, a fast-forward time detection unit that detects the normal playback time of the video data amount to be fast-forwarded based on the input fast-forward instruction, and normal when the fast-forward instruction is input Fast forward based on the unit time detector that detects the time required for normal playback of video data in the video unit being played, the normal playback time detected by the fast forward time detector, and the time detected by the unit time detector A unit number detection unit for detecting the number of video units constituting the amount of video data to be detected, an address read from the disk of the video unit of the video data being normally played when a fast-forward instruction is input, and unit number detection Based on the number detected by the recording unit, the video data to be reproduced next is recorded on the disc of the video unit. The control information includes an address detection unit that detects a next address indicating a response and a search output unit that retrieves and outputs video data to be reproduced to the next level by searching the disk based on the detected next address. The start time data for starting the normal playback of the related video data and the end time data for ending the normal playback are included, and the unit time detection unit detects the video data being normally played back when the fast-forward instruction is input. The time required for normal reproduction of the video data of the video unit is detected based on the start time data and end time data of the control information in the video unit.

  Preferably, the disc has a recording area corresponding to each of the plurality of video units and stores an address in the disc of the video unit, and each address of the recording area corresponds to the address when content is played back When the video data in the video unit is instructed by the order data indicating the order in which the video data is to be played back, the address detection unit reads the video data currently being played back from the video unit disk at the time when the fast-forward command is input Search the recording area based on the address, calculate the order data of the video unit of the video data to be reproduced next based on the order data indicating the searched address and the number detected by the unit number detection unit, The recording area is searched based on the calculated order data, and the address indicated by the order data is assigned to the next address. With a search unit to read as.

  Preferably, the disc has an address area in which the address of the video unit of the predetermined video data to be reproduced next is recorded when a fast-forward instruction is input during normal reproduction, and the search unit calculates When it is detected that the order data is not valid, the address read from the address area is given to the search output unit as the next address.

  Preferably, when the address detected by the address detection unit is detected to indicate an address outside the area where the content is recorded on the disc, the reading of the video data from the disc based on the fast-forward instruction is terminated.

  Preferably, the recording format of the content on the disc indicates the + VR format or the Video format.

  According to still another aspect of the present invention, a method for reproducing content from a disc on which content composed of a plurality of video units including video data and control information related to the video data is recorded has the following characteristics.

  When a fast-forward instruction is input during normal playback of the content, a step of detecting a normal playback time of the video data amount to be fast-forwarded based on the input fast-forward instruction, and normal playback at the time when the fast-forward instruction is input A step of detecting a time required for normal reproduction of the video data in the video unit, and a step of detecting the number of the video units constituting the video data amount to be fast-forwarded based on the detected normal reproduction time and the detected time. And the video to be played to the next level based on the address read from the disk of the video unit of the video data currently being played back at the time the fast forward instruction is input and the number detected in the step of detecting the number of units A step of detecting a next address indicating an address in the disk of the video unit of data, and a detected second order A step of searching for a disc based on the dress and reading out and outputting video data to be reproduced next, and the control information includes start time data for starting normal reproduction of the related video data and end of normal reproduction. In the step of detecting the period required for normal reproduction of the video data of the video unit, which is included in the time data, it is necessary for normal reproduction of the video data of the video unit of the normal video data when the fast-forward instruction is input The time is detected based on the start time data and end time data of the control information in the video unit.

  The disc has a recording area corresponding to each of the plurality of video units and stores an address in the disc of the video unit, and each address of the recording area corresponds to the address when content is played back. The step of detecting the address of the video unit in the video unit of the video data to be reproduced next is indicated by the order data indicating the order in which the video data in the video unit is to be reproduced. The recording area is searched based on the address read from the disk of the video unit of the video data being normally played back, and the next order is based on the order data indicating the searched address and the number detected by the unit number detection unit. Calculate the order data of the video unit of the video data to be played back, and based on the calculated order data Searching for can recording area, having a reading step the address to which the order data is indicated as next order address.

  Further, the disc has an address area in which the address of the video unit of the predetermined video data to be reproduced at the next position when a fast forward instruction is input during normal reproduction, and the calculated order data is When it is detected that the address is not valid, the address read from the address area is output as the next address, and the address detected in the address detecting step is an address outside the area where the content on the disc is recorded. When it is detected that the instruction is issued, reading of the video data from the disc based on the fast-forward instruction is terminated, and the recording format of the content on the disc indicates the + VR format or the Video format.

  According to still another aspect of the present invention, there is provided a method for reproducing content from a disc on which content composed of a plurality of video units including video data and control information related to the video data is recorded. Prepare.

  When a fast-forward instruction is input during normal playback of the content, a step of detecting a normal playback time of the video data amount to be fast-forwarded based on the input fast-forward instruction, and normal playback at the time when the fast-forward instruction is input A step of detecting a time required for normal reproduction of video data in the video unit, and a step of detecting the number of video units constituting the video data amount to be fast-forwarded based on the detected normal reproduction time and the detected time. And the video to be played to the next level based on the address read from the disk of the video unit of the video data currently being played back at the time the fast forward instruction is input and the number detected in the step of detecting the number of units A step of detecting a next address indicating an address in the disk of the video unit of data, and a detected second order A step of searching for a disc based on the dress and reading out and outputting video data to be reproduced next, and the control information includes start time data for starting normal reproduction of the related video data and end of normal reproduction. In the step of detecting the period required for normal reproduction of the video data of the video unit, which is included in the time data, it is necessary for normal reproduction of the video data of the video unit of the normal video data when the fast-forward instruction is input The time is detected based on the start time data and end time data of the control information in the video unit.

  Preferably, the disc has a recording area corresponding to each of the plurality of video units and stores an address in the disc of the video unit, and each address of the recording area corresponds to the address when content is played back The step of detecting the address on the disc of the video unit of the video data to be reproduced in the next order is indicated by the order data indicating the order in which the video data in the video unit is to be reproduced. The recording area is searched based on the address read from the disk of the video unit of the video data being played normally, and the next order is determined based on the order data indicating the searched address and the number detected by the unit number detection step. Calculate the order data of the video units of the video data to be played, and the calculated order Searching for the recording area on the basis of the over data, having a reading step the address to which the order data is indicated as next order address.

  Preferably, the disc has an address area in which an address in the disc of the video unit of the predetermined video data to be reproduced next when a fast forward instruction is input during normal reproduction, and the calculated order data Is detected as invalid, the address read from the address area is output as the next address.

  Preferably, when it is detected that the address detected by the address detecting step indicates an address outside the area where the content is recorded on the disc, the reading of the video data from the disc based on the fast-forward instruction is terminated.

  Preferably, the recording format of the content on the disc indicates the + VR format or the Video format.

  According to the present invention, the number of video units constituting the video data amount to be fast-forwarded is calculated based on start time data for starting normal reproduction of control information and end time data for ending normal reproduction, The user can easily specify the address of the video unit to be played next by fast-forwarding by the address on the disc of the video unit being normally played at the time of fast-forwarding instruction input, so the user regardless of the recording format of the disc, Information recorded on the disc at a desired speed indicated by the fast-forward instruction can be fast-forwarded and reproduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, the data (content) on the disc is recorded according to the + VR format, but the recording format is not limited to this, and the same applies to the Video format.

  In the present embodiment, the type and data structure of data recorded on a DVD are not changed at all in the recording operation according to either the + VR format or the Video format, and in a playback mode including fast-forward playback. The feature is that the type of data used for controlling the operation is changed from the conventional one.

  FIG. 1 is a block configuration diagram of a DVD recording / reproducing apparatus 100 according to an embodiment of the present invention. Referring to FIG. 1, a DVD recording / reproducing apparatus 100 includes a control unit 3 including a CPU (Central Processing Unit), an HDD (Hard Disc Drive) 5, an HDD 5 and a DVD 7 for centrally controlling and monitoring each unit of the apparatus. Disc control unit 9 for controlling access, antenna 11 for receiving a broadcast signal such as digital TV (Television) broadcast, and the received broadcast signal output from the antenna 11 is inputted to extract a broadcast signal of a desired channel A TV tuner 13, an A / V (Audio / Visual) input unit 15 for inputting an audio signal or a video signal from an external device (not shown), an encoding unit 17, a decoding unit 19, an output unit 21, and a user A key input unit 23 including a plurality of keys for providing various information and instructions to the DVD recording / reproducing apparatus 100 by external operation, A display unit 25 for displaying various information such as an operation mode of the playback apparatus 100, a ROM (Read Only Memory) 34 and a RAM (Random Access Memory) 35 for storing data and programs accessed by the CPU of the control unit 3, and A data bus 31 for connecting these units is included.

  The RAM 35 has an area 351 for storing a variable SP, which will be described later, an area 352 for storing a variable CK, which will be described later, an area 353 for storing the NV-PCK of the current VOBU # j, which will be described later, and title data 6 which will be described later. Including an area 354 for storing the VTSI of the VTSI. Areas 353 and 354 are read from DVD 7 by disk control unit 9 and read data is written by control unit 3 in playback mode and fast-forward playback mode.

  A DVD 7 is detachably mounted on the disk control unit 9, and the disk control unit 9 accesses the loaded DVD 7 to read / write data. It is assumed that data is recorded on the DVD 7 according to the + VR format by the disk control unit 9.

  When recording data on the HDD 5 or DVD 7, for example, when recording data of a TV broadcast program or data according to a signal input via the A / V input unit 15, a desired program input via the antenna 11 and the TV tuner 13 Or the video signal input via the A / V input unit 15 is encoded by the encoding unit 17 in accordance with, for example, MPEG (Motion Picture Experts Group) and provided to the disk control unit 9 as data. 9 records the data on the HDD 5 or DVD 7 under the control of the control unit 3.

  When reproducing data from the HDD 5 or DVD 7, the disk control unit 9 reads the data of the designated program (content) from the HDD 5 or DVD 7 and gives it to the decoding unit 19 under the control of the control unit 3. The decoding unit 19 decodes the given data in accordance with MPEG, and a signal obtained as a result of the processing is output to the TV receiver 200 (not shown) via the output unit 21 via the cable 400. On the TV receiver 200, an image according to the reproduced data is displayed or outputted as audio. Here, the DVD recording / reproducing apparatus 100 and the TV receiver 200 are assumed to be wired communication using the cable 400, but may be wireless communication instead of wired communication.

  The control unit 3 includes a reproduction unit 37, an instruction detection unit 38, a fast-forward unit 39, and a control unit 36 that controls them. The fast-forward unit 39 includes a map search unit 391. The playback unit 37, the instruction detection unit 38, the fast-forward unit 39 including the map search unit 391, and the control unit 36 each read out the corresponding program from the ROM 34 or the RAM 35 by the CPU of the control unit 3, and execute the read program Thus, the function is realized.

  FIG. 2 schematically shows the recorded contents according to the + VR format of DVD7. One or more title data 6 is recorded on the DVD 7. Details of the title data 6 are shown in FIG.

  Referring to FIG. 3, title data 6 corresponds to various content data such as one TV broadcast program (program). All the title data 6 is stored in an area excluding the lead-in area of the DVD 7 disc.

  The title data 6 includes VTSI (Video Title Set Information), VOBS (Video Object Set), and VTSI for backup. The VOBS is composed of a plurality of CELL # i (i = 1, 2, 3,..., N). CELL # i stores recorded content data. Depending on the recording format, one CELL # i stores an amount of data corresponding to a playback time of 30 seconds to 2 minutes in normal playback.

  Referring to FIG. 4, VTSI is data 70 indicating the end address of title data 6, data indicating the total number of cells (CELL # i) constituting title data 6, and start of the first cell in title data 6. Data ST1 indicating an address, data indicating a total time required for reproduction when the title data 6 is normally reproduced, and an address map 40 are included.

  Referring to FIG. 3, CELL # i includes a plurality of VOBUs (Video Object Units) #j (j = 1, 2,..., M).

  VOBU # j includes NV-PCK (navigation pack) at the head, and then actual video and audio data (VIDEO & AUDIO). NV-PCK is information related to the VOBU # j, and refers to control information for managing the VOBU # j and reproducing data.

  NV-PCK is data 71 indicating the playback start time of VOBU # j (time indicated by symbol T2 in FIG. 3), and the playback end time of the corresponding VOBU # j (time indicated by symbol T3 in FIG. 3). , Data 73 indicating the time required to reproduce the data from the head of the corresponding CELL # i (position indicated by the symbol T1 in FIG. 3), and search information 60.

  Data 71, 72, and 73 indicate the playback time when the content data 6 starts to be played at the normal playback speed from the head data, that is, from the cell start address indicated by the data ST1. If the reproduction start time of the data at the address indicated by the data T1 in FIG. 3 is the reference time, the times indicated by the codes T1, T2, and T3 indicate the elapsed time from the reference time.

  The search information 60 includes a plurality of information 61. The information 61 includes the address of the VOBU to be reproduced 0.5 seconds after the currently reproduced VOBU # j, assuming that the VOBU # j having the information 61 is currently reproduced in normal reproduction. VOBU # j to be played next at 0.5 second intervals, such as the address of VOBU to be played after 0 seconds, the address of VOBU to be played after 1.5 seconds, and the address of VOBU to be played after 3 seconds Is stored.

  With reference to FIG. 5, the address map 40 recorded corresponding to each title data 6 in the DVD 7 will be described. The address map 40 includes a top area 41 for storing address map end address data 43 indicating the final address of the area in which the address map itself is recorded, and an area 42 following the area 41. The address map end address data 43 indicates a relative address from the top of the address map 40.

  In the area 42, the record 44 corresponding to each of all the VOBU # j constituting the title data 6 corresponding to the address map 40 is the order in which the VOBU # j should be reproduced when the title data 6 is reproduced. Are stored in ascending order. Here, it is assumed that h records 44 are stored. The record 44 stores address data AD indicating the address on the DVD 7 where the corresponding VOBU # j is recorded.

  The map search unit 391 searches the address map 40 and reads the contents of the predetermined record 44 (address data AD). In this search, the map search unit 391 counts the number of records 44 stored from the top of the address map 40 based on what number the record 44 is stored from the top of the address map 40. A value indicating the detected order (any one of 1, 2, 3,..., H) is set in the temporary variable K.

  Here, the smaller the value indicated by the record address AD of the record 44 is, the smaller the value of the variable K indicating the order of the record 44 is. The larger the value of the address indicated by the address data AD is, the larger the value of the variable K is. .

  Next, referring to the flowchart of FIG. 6, the user through the key input unit 23 during the reproduction operation of the predetermined title data 6 at the normal reproduction speed of the DVD 7 on which the content is recorded according to the + VR format by the reproduction unit 37. A description will be given assuming that fast-forward playback is instructed by the key operation.

  Here, since the speed at which the control unit 3 accesses the RAM 35 is much faster than the speed at which the control unit 3 accesses the DVD 7, the VTSI including the address map 40 of the predetermined title data 6 can be fast-forwarded. It is assumed that the disk controller 9 previously reads from the DVD 7 and stores it in the area 354 of the RAM 35 in order to realize high-speed access. However, if high-speed access is possible, the address map 40 of the DVD 7 may be accessed without being transferred to the area 354 in advance. For the same reason, it is assumed that the NV-PCK of VOBU # j currently being reproduced is also read from the DVD 7 and stored in the area 353 of the RAM 35. If high speed access is possible, the NV-PCK is transferred to the area 353 in advance. The NV-PCK of the DVD 7 may be accessed without doing so.

  When fast-forward playback is instructed during normal playback, the instruction data according to the key operation is given to the control unit 36 (step S1). When the instruction is input, the control unit 36 gives the instruction to the instruction detection unit 38. The instruction detection unit 38 detects a skip interval specified by the user based on an instruction given from the control unit 36. For example, the interval is detected based on the number of operations of the fast-forward key of the key input unit 23. The skip interval indicates the reproduction time required for normal reproduction of the amount of data to be skipped. The detected skip interval is set in the variable SP (step S2). The variable SP is stored in the area 351 of the RAM 35.

  Next, the map search unit 391 of the fast-forward unit 39 sets the variable K indicating the stored order in the address map 40 of the record 44 of the VOBU # j that is currently being reproduced (reproduced when the fast-forward instruction is input). A value is set in the variable CK (step S3). Variable CK is stored in area 352 of RAM 35.

  That is, during the reproduction of the content of the DVD 7, the recording address is read from the DVD 7 together with the data of VOBU # j to be reproduced by the disc control unit 9. Since the disk control unit 9 outputs the read VOBU # j to the decoding unit 19, the video according to VOBU # j is displayed on the TV receiver 200. Further, the disk control unit 9 outputs the address of the read VOBU # j on the DVD 7 and NV-PCK to the control unit 3.

  The map search unit 391 inputs the address of VOBU # j given from the disk control unit 9 and searches the address map 40 of the RAM 35 based on the input address. By this search, the record 44 storing the address data AD indicating the input address is specified, and a value indicating the order of the specified record 44 is set in the variable K. As a result, the variable K indicates a value indicating the order in which the record 44 of the currently reproduced VOBU # j is to be reproduced.

  Next, the fast-forward unit 39 retrieves the NV-PCK of the VOBU # j currently being played stored in the area 353 of the RAM 35, and reads and reads the playback start time data 71 and the playback end time data 72. Based on the data 71 and 72, a time T (= T2-T1) required for normal reproduction of the data of one VOBU # j is calculated (step S5).

  Next, the fast-forward unit 39 searches the address map 40 of the RAM 35 and calculates a value indicated by a variable K indicating the order in which the next VOBU # j is to be reproduced (hereinafter referred to as the next order data K). To do. The value indicated by the next order data K is calculated according to (value of variable CK + (value of variable SP) / time T required for reproduction) (step S7). Here, it is assumed that the value of the variable SP is larger than the time T.

  In the fast-forward playback mode, the next VOBU # j is a part of the VOBU # j that is to be reproduced after the VOBU # j that is currently being reproduced, after skipping some data (one or more VOBU # j). VOBU # j to be reproduced (read) following some data. In normal reproduction, it indicates VOBU # j + 1 to be reproduced following VOBU # j being currently reproduced.

  Next, the control unit 36 determines whether or not the calculated value of the next order data K is valid. That is, the control unit 36 compares the calculated value according to ((the value of the next order data K) × 4 bytes) with the value indicated by the address map end address data 43 read from the area 41 of the address map 40, If it is determined that the comparison result indicates (calculated value> value indicated by address map end address data 43), it is detected that the next order data K is not valid (NO in step S9). That is, since the record 44 indicated by the next order data K is not registered in the address map 40, the next VOBU # j corresponding to the order data K is the data constituting the title data 6 currently being reproduced. Not detected. Thereafter, the processing proceeds to step S13 and later described later. On the other hand, if it is determined that the comparison result indicates (calculated value ≦ value indicated by address map end address data 43), it is detected that the next order data K is valid (YES in step S9). That is, since the record 44 designated by the next order data K is registered in the address map 40, the next VOBU # j corresponding to the record 44 designated by the next order data K is the title currently being reproduced. It is detected that the data constitutes data 6. Thereafter, the process proceeds to step S11 and subsequent steps.

  In step S11, the map search unit 391 detects the address of VOBU # j corresponding to the record 44 indicated by the next order data K. That is, the address map 40 is searched based on the next order data K, and the address data AD is read from the record 44 indicated by the next order data K. The read address data AD is given to the control unit 36.

  Next, the map search unit 391 sets the value of the next order data K to the variable CK (step S16). Thereby, the variable CK is updated so as to indicate the value of the current next order data K.

  The control unit 36 determines whether or not the next VOBU # j corresponding to the given address data AD is included in the title data 6 (step S17). Specifically, the title data end address indicated by the data 70 read from the VTSI of the RAM 35 is compared with the address of the given address data AD, and the comparison result is (title data end address ≦ address of address data AD). When instructed, it is detected that the next VOBU # j is not included in the title data 6 (NO in step S17). Thereafter, the series of fast-forward playback processing ends, and the original normal playback is performed from the VOBU # j indicated by the variable CK by the playback unit 37.

  On the other hand, when the comparison result indicates (title data end address> address data AD address), it is detected that the next VOBU # j is included in title data 6 (YES in S17), and fast-forward playback is performed. In order to continue, the process of step S19 is performed.

  In step S19, since the control unit 36 outputs the given address data AD to the disk control unit 9, the disk control unit 9 searches the DVD 7 for the next VOBU # j designated by the given address data AD, The next-order VOBU # j read out by the search is output to the decoding unit 19, and the NV-PCK of the next-order VOBU # j is output to the control unit 36. Thereby, the video according to the actual data is displayed on the TV receiver 200 via the decoding unit 19 and the output unit 21, and the sound is output.

  Thereafter, the process proceeds to step S5, and the processes after step S5 are performed in the same manner as described above.

  If it is detected that the next order data K is not valid (NO in step S9), the fast-forward unit 39 searches for the NV-PCK of the current VOBU # j stored in the area 351 in the RAM 35. The address of a predetermined next-order VOBU # j of the information 60 is detected (step S13). For example, a VOBU address reproduced after 3 seconds is detected as a predetermined next-order VOBU # j. Assume that the address 61 of the next VOBU # j read from the NV-PCK search information 60 in the area 351 is determined in advance in step S13.

  In step S15, the map search unit 391 searches the address map 40 of the RAM 35 based on the read address of the next VOBU # j, and indicates the order of the records 44 in which the address is stored as the address data AD. And sets the acquired value to the variable K.

  Thereafter, the processing from step S16 onward is performed in the same manner, and fast-forward playback continues until it is determined that the next VOBU # j is not included in the title data 6 (NO in step S17).

  As described above, in the + VR format, the search information 60 of the control information is simplified and recorded in order to reduce the burden at the time of recording, so that the search information 60 required for fast forwarding is less than the video format and the fast forwarding speed is reduced. In the present embodiment, at least the address map 40 and the playback start / end time data 71 and 72 of VOBU # j currently being played back (if necessary, further search information is used). 60) is used to jump from VOBU # j currently being played back to VOBU # j to be played next, at a time interval according to the fast-forward speed designated by the user via the key input unit 23, and to jump to VOBU # j data of the next order can be read and reproduced. Thus, even if the search information 60 is a content recorded in a simplified format, reproduction start / end of at least the address map 40 and the currently reproduced VOBU # j recorded in common with various formats Since the fast-forwarding is performed using the time data 71 and 72 (further, the search information 60 is used if necessary), the fast-forwarding speed according to the user's request can be achieved.

  FIG. 7 shows the external appearance of the DVD recording / reproducing apparatus 100 and the TV receiver 200 according to the present embodiment. The DVD recording / reproducing apparatus 100 is connected to the TV receiver 200 via a cable 400. A DVD 7 is detachably attached to the DVD recording / reproducing apparatus 100 from the outside. In addition, the front panel of the DVD recording / reproducing apparatus 100 is provided with a key input unit 23 so that it can be operated from the outside. Further, a display unit 25 made of liquid crystal for displaying the operating state of the DVD recording / reproducing apparatus 100 is provided. Here, it is assumed that an instruction such as playback or fast-forward playback is given from the user via the key input unit 23. Instead, an instruction signal modulated by an infrared signal or the like is transmitted from the remote controller 300 to the DVD recording / playback. It may be given to the device 100.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a block diagram of a DVD recording / reproducing apparatus according to an embodiment of the present invention. It is a figure which shows typically the recording content of DVD which concerns on embodiment of this invention. It is a figure explaining the title data which concern on embodiment of this invention. It is a figure explaining VTSI which concerns on embodiment of this invention. It is a figure explaining the address map which concerns on embodiment of this invention. It is a process flowchart of the fast forward reproduction mode which concerns on embodiment of this invention. It is a figure which shows the external appearance of the DVD recording / reproducing apparatus which concerns on embodiment of this invention, and TV receiver. It is a figure which shows typically the recording content of DVD which concerns on a prior art and embodiment of this invention.

Explanation of symbols

  6 Title data, 7 DVD, 36 Control section, 37 Playback section, 38 Instruction detection section, 39 Fast forward section, 40 Address map, 60 Search information, 70 Title data end address, 71 VOBU # j playback start time data, 72 Playback start time data of VOBU # j, 391 map search unit.

Claims (14)

A disc device that reproduces the content from a disc on which content comprising a plurality of video units including video data and control information related to the video data is recorded,
An operation unit operated by a user to input an instruction;
When fast-forward instruction is input by the operation unit is operated during normal playback of the content, based on the number of times which the operation section is operated when entering the fast-forward instruction, the image data quantity to be fast forward A fast-forward time detector that detects normal playback time;
A unit time detection unit for detecting a time required for normal reproduction of the video data in the video unit being normally reproduced at the time when the fast-forward instruction is input;
Unit number detection for detecting the number of video units constituting the video data amount to be fast-forwarded based on the normal reproduction time detected by the fast-forward time detection unit and the time detected by the unit time detection unit And
Based on the address read from the disc of the video unit of the video unit being normally played back when the fast forward instruction is input, and the number detected by the unit number detection unit, the next playback is performed. An address detector for detecting a next address indicating an address in the disk of the video unit of the video data to be processed;
A search output unit for searching out the disc based on the detected next address and reading out and outputting video data to be reproduced next;
The control information includes start time data for starting normal reproduction of the related video data and end time data for ending normal reproduction,
The unit time detection unit is configured to determine a time required for normal reproduction of the video data of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the start of the control information in the video unit. Detect based on time data and end time data,
The disc has a recording area in which addresses of the video unit in the disc are stored corresponding to each of the plurality of video units,
Each address of the recording area is indicated by the order data indicating the order in which the video data in the video unit corresponding to the address in the case of reproducing the content is to be reproduced,
The address detection unit
Searching for the recording area based on an address read from the disc of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the order data indicating the searched address; Based on the number detected by the unit number detection unit, the order data of the video unit of the video data to be reproduced next is calculated, the recording area is searched based on the calculated order data, and the order A search unit for reading out the address indicated by data as the next address;
The disc has an address area in which an address in which an address in the disc of a video unit of predetermined video data to be reproduced next is recorded when a fast-forward instruction is input during the normal reproduction is recorded. ,
When it is detected that the order data calculated by the search unit is not valid, the address read from the address area is given to the search output unit as the next address,
When the address detected by the address detection unit is detected to indicate an address outside the area where the content is recorded on the disc, the reading of the video data from the disc based on the fast-forward instruction is terminated,
A disc device in which a recording format of the content on the disc indicates a + VR format or a Video format. A disc device that reproduces the content from a disc on which content comprising a plurality of video units including video data and control information related to the video data is recorded,
An operation unit operated by a user to input an instruction;
When fast-forward instruction is input by the operation unit is operated during normal playback of the content, based on the number of times which the operation section is operated when entering the fast-forward instruction, the image data quantity to be fast forward A fast-forward time detector that detects normal playback time;
A unit time detection unit for detecting a time required for normal reproduction of the video data in the video unit being normally reproduced at the time when the fast-forward instruction is input;
Unit number detection for detecting the number of video units constituting the video data amount to be fast-forwarded based on the normal reproduction time detected by the fast-forward time detection unit and the time detected by the unit time detection unit And
Based on the address read from the disc of the video unit of the video unit being normally played back when the fast forward instruction is input, and the number detected by the unit number detection unit, the next playback is performed. An address detector for detecting a next address indicating an address in the disk of the video unit of the video data to be processed;
A search output unit for searching out the disc based on the detected next address and reading out and outputting video data to be reproduced next;
The control information includes start time data for starting normal reproduction of the related video data and end time data for ending normal reproduction,
The unit time detection unit is configured to determine a time required for normal reproduction of the video data of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the start of the control information in the video unit. A disk device that detects based on time data and the end time data. The disc has a recording area in which addresses of the video unit in the disc are stored corresponding to each of the plurality of video units,
Each address of the recording area is indicated by the order data indicating the order in which the video data in the video unit corresponding to the address in the case of reproducing the content is to be reproduced,
The address detection unit
Searching for the recording area based on an address read from the disc of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the order data indicating the searched address; Based on the number detected by the unit number detection unit, the order data of the video unit of the video data to be reproduced next is calculated, the recording area is searched based on the calculated order data, and the order The disk device according to claim 2, further comprising a search unit that reads the address indicated by data as the next address. The disc has an address area in which an address in the disc of a video unit of predetermined video data to be reproduced next is input when a fast-forward instruction is input during the normal reproduction,
4. The disk device according to claim 3 , wherein when it is detected that the order data calculated by the search unit is not valid, the address read from the address area is given to the search output unit as the next address. .   When the address detected by the address detection unit is detected to indicate an address outside the area where the content is recorded on the disc, the reading of the video data from the disc based on the fast-forward instruction is terminated. The disk device according to any one of claims 2 to 4. The recording format to the disk content refers to + VR format, disk equipment according to any one of claims 2 to 5.   6. The disc device according to claim 2, wherein a recording format of the content on the disc indicates a video format. A method of reproducing the content from a disc on which content composed of a plurality of video units including video data and control information related to the video data is recorded,
During normal playback of the content, the fast-forward instruction via the operation section operated by the user is input, based on the number of times which the operation section is operated when entering the fast-forward instruction, the image data quantity to be fast forward Detecting the normal playback time of
Detecting a time required for normal reproduction of the video data in the video unit being normally reproduced at the time when the fast-forward instruction is input;
Based on the normal reproduction time detected by the step of detecting the fast-forwarding time and the time detected by the step of detecting the unit time, the number of the video units constituting the video data amount to be fast-forwarded is detected. And steps to
Based on the address read from the disk of the video unit of the video unit being normally played back when the fast-forward instruction is input, and the number detected by the step of detecting the number of units, Detecting a next address indicating an address in the disc of the video unit of the video data to be reproduced;
A step of searching for the disc based on the detected next address and reading out and outputting video data to be reproduced next;
The control information includes start time data for starting normal reproduction of the related video data and end time data for ending normal reproduction,
In the step of detecting a period required for normal reproduction of the video data of the video unit, a time required for normal reproduction of the video data of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, Detecting based on the start time data and the end time data of the control information in the video unit,
The disc has a recording area in which addresses of the video unit in the disc are stored corresponding to each of the plurality of video units,
Each address of the recording area is indicated by the order data indicating the order in which the video data in the video unit corresponding to the address in the case of reproducing the content is to be reproduced,
Detecting the address of the video unit of the video data to be reproduced in the next order in the disc;
Searching for the recording area based on an address read from the disc of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the order data indicating the searched address; Based on the number detected by the unit number detection unit, the order data of the video unit of the video data to be reproduced next is calculated, the recording area is searched based on the calculated order data, and the order Reading the address indicated by the data as the next address,
The disc has an address area in which an address in the disc of a video unit of predetermined video data to be reproduced next is input when a fast-forward instruction is input during the normal reproduction,
When it is detected that the calculated order data is not valid, the address read from the address area is output as the next address,
When it is detected that the address detected in the step of detecting the address indicates an address outside the area where the content is recorded on the disc, reading of the video data from the disc based on the fast-forward instruction is terminated. And
The recording method of the content on the disc indicates a + VR format or a Video format. A method of reproducing the content from a disc on which content composed of a plurality of video units including video data and control information related to the video data is recorded,
During normal playback of the content, the fast-forward instruction via the operation section operated by the user is input, based on the number of times which the operation section is operated when entering the fast-forward instruction, the image data quantity to be fast forward Detecting the normal playback time of
Detecting a time required for normal reproduction of the video data in the video unit being normally reproduced at the time when the fast-forward instruction is input;
Based on the normal reproduction time detected by the step of detecting the fast-forwarding time and the time detected by the step of detecting the unit time, the number of the video units constituting the video data amount to be fast-forwarded is detected. And steps to
Based on the address read from the disk of the video unit of the video unit being normally played back when the fast-forward instruction is input, and the number detected by the step of detecting the number of units, Detecting a next address indicating an address in the disc of the video unit of the video data to be reproduced;
A step of searching for the disc based on the detected next address and reading out and outputting video data to be reproduced next;
The control information includes start time data for starting normal reproduction of the related video data and end time data for ending normal reproduction,
In the step of detecting a period required for normal reproduction of the video data of the video unit, a time required for normal reproduction of the video data of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, A reproduction method of detecting based on the start time data and the end time data of the control information in the video unit. The disc has a recording area in which addresses of the video unit in the disc are stored corresponding to each of the plurality of video units,
Each address of the recording area is indicated by the order data indicating the order in which the video data in the video unit corresponding to the address in the case of reproducing the content is to be reproduced,
Detecting the address of the video unit of the video data to be reproduced in the next order in the disc;
Searching for the recording area based on an address read from the disc of the video unit of the video data being normally reproduced at the time when the fast-forward instruction is input, and the order data indicating the searched address; Based on the number detected by the unit number detection unit, the order data of the video unit of the video data to be reproduced next is calculated, the recording area is searched based on the calculated order data, and the order The reproduction method according to claim 9, further comprising a step of reading the address indicated by data as the next address. The disc has an address area in which an address in a disc of a video unit of a predetermined video data to be played to the next position when a fast forward instruction is input during the normal playback,
The reproduction method according to claim 10 , wherein when it is detected that the calculated order data is not valid, the address read from the address area is output as the next address.   When it is detected that the address detected in the step of detecting the address indicates an address outside the area where the content is recorded on the disc, reading of the video data from the disc based on the fast-forward instruction is terminated. The reproduction method according to any one of claims 9 to 11.   The reproduction method according to any one of claims 9 to 12, wherein a recording format of the content on the disc indicates a + VR format.   The playback method according to claim 9, wherein a recording format of the content on the disc indicates a video format.

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