JP2007142813A - Disk recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk recording and reproducing device capable of increasing the speed of a time from the put-on of a power supply to a thumb-nail display. <P>SOLUTION: The presence of a thumb-nail information table in a non-volatile memory 10 is confirmed in the case of the put-on of the power supply. When the thumb-nail information table is not stored; a management information is read from a disk medium 1, an encoding data converted into the image data of the thumb-nail display is read, and the thumb-nail information table is prepared and stored in the non-volatile memory 10. When the thumb-nail information table is stored in the non-volatile memory; the table is read. A data-reading time from the disk medium is shortened, and a thumb nail can be displayed at a high speed by reading the encoding data for a conversion into a thumb-nail image from the disk medium 1, by using the place of the recording start of the encoding data converted into the image data of the thumb-nail display and the recording size. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk recording / reproducing apparatus, and more particularly to a technique that enables high-speed display of thumbnails of video and audio data recorded on a disk medium during reproduction of the disk medium.

  In recent years, products such as a DVD recorder and a DVD camcorder that use a disk medium as a recording medium are rapidly spreading. In the above product, a thumbnail list of the video data recorded on the disk medium is displayed so that the operator can quickly select and reproduce a favorite one from the video data recorded on the disk medium.

  Conventionally, a sequence as shown in FIG. 5 is performed to display thumbnails. That is, after the power is turned on, the disk is first recognized (S34). After completion of disc recognition, the file system is read (S36), and management information is read in order to specify the encode data recording start position to be converted into thumbnail display video data and the size of the encode data (S37). ). Management information is read in the order of VMGI (Video Manager Information), VTSI (Video Title Set Information), and Navigation Pack in a disk medium recorded in the DVD-VIDEO standard.

  In addition, in a disc medium recorded with the DVD-VR standard, VR_MANGR. Read the IFO. Next, the encoded data is read (S38), and finally converted into a thumbnail image (S39) and displayed (S40). In the sequence of S34 to S40, there is a problem that it takes a long time from power-on to completion of thumbnail display.

  Therefore, a method described in Patent Document 1 is known as a method for shortening the time until the conventional thumbnail display is completed.

In this technology, catalog information such as thumbnails, disc medium identification information, history information, etc. are stored in a storage means such as a hard disk, and when the disc medium is inserted, history information read from the disc medium or identification If the information matches the history information stored in the storage means or the identification information, catalog information such as thumbnails stored in the hard disk or the like is used to achieve high-speed thumbnail display. Yes.
Also, as described in Patent Document 2, when thumbnail display video data or the like is recorded in a data recording area of a disk medium and thumbnail display is performed, the thumbnail video data is read and used to display thumbnails. Realization of high speed.
JP 2005-56466 A JP 2001-111963 A

Since the technique of Patent Document 1 is a technique for storing management information of a plurality of disc media and catalog information such as thumbnails, it is necessary to have a storage means capable of storing a large amount of information, such as a DVD camcorder. There is a problem that it is very difficult to apply the technology because it is difficult to provide the storage unit in a product that requires reduction in size and cost.
Further, the technique of Patent Document 2 has a problem in that thumbnail information is recorded on a disk medium, so that the thumbnail information increases and the area for the operator to record decreases.

  An object of the present invention is to solve the above-described conventional problems and to provide a disc recording / reproducing apparatus capable of speeding up the time from power-on to thumbnail display.

In order to solve the above-described conventional problems, a disc recording / reproducing apparatus according to the present invention includes a disc medium, a decoder for reproducing moving image data recorded on the disc medium, and a predetermined frame image of the moving image data. In a disk recording / playback apparatus comprising a thumbnail image generation stage for generating thumbnail images and a nonvolatile memory for storing various data,
A thumbnail information generating unit for generating thumbnail information from the playback control information recorded on the disk medium; a thumbnail information recording unit for storing the thumbnail information in the nonvolatile memory; and the thumbnail required information in the nonvolatile memory. A thumbnail information detecting unit that detects whether or not the thumbnail information is stored, and when the thumbnail information detecting unit determines that there is no thumbnail information in the nonvolatile memory, the thumbnail information generating unit generates thumbnail information, and The thumbnail information recording unit includes a system controller unit that performs control of recording in the nonvolatile memory.

  Further, the thumbnail information is a predetermined frame address in the moving image data and a predetermined frame data size.

  In addition, the thumbnail information generation unit acquires the thumbnail information from a navigation pack of the DVD-VIDEO standard.

  The western part of the thumbnail information property is VR_MANGR. The thumbnail information is obtained from an IFO file.

  As described above, according to the first and second aspects of the invention, the time from power-on to thumbnail display is increased even in a product such as a DVD camcorder that is required to be reduced in size, weight, and cost. Can be

  Embodiments of a disk recording / playback apparatus according to the present invention will be described below in detail with reference to the drawings.

  FIG. 1 shows an overall configuration diagram of a disk recording / reproducing apparatus according to a first embodiment of the present invention.

  In FIG. 1, 2 is a spindle motor that rotationally drives the disk 1, 3 is an optical pickup that records and reproduces information signals input / output from / to the disk 1 from the input / output controller 13, and 4 controls the spindle motor 2 and the optical pickup 3. The servo control unit 5 is an amplifier that amplifies an RF signal and a servo signal from the output signal of the optical pickup 3, 6 is a signal processing unit that binarizes the output signal of the amplifier 5, and 7 is binarized by the signal processing unit 6. A decoder for decoding the RF signal and thumbnail image data stored in the memory 8; 8 a memory for temporarily storing the output signal of the decoder 7 and thumbnail video data; 9 a system controller for controlling the entire disk recording / reproducing apparatus; Non-volatile memory that stores firmware and various information executed by the system controller 9, and 11 is a memo 8 is an encoder having a function of encoding a moving picture information signal on MPEG 8 into MPEG and the like, and a function of encoding a frame image on memory 8 into thumbnail video data. Reference numeral 12 denotes an encoding signal of the encoder 11 as a control signal of the system controller 9. A power control unit for controlling and controlling the power of the laser light source of the optical pickup 3, 13 is an input / output control unit for inputting information signals at the time of recording on the disk 1, and outputting data stored in the memory 8 at the time of reproduction, and 14 is a thumbnail. A thumbnail information generation unit 15 that generates information, 15 is a thumbnail information recording unit that records thumbnail information in the nonvolatile memory 10, and 16 is a thumbnail information detection unit that detects whether or not thumbnail information is recorded in the nonvolatile memory 10. is there.

  The operation of the disk recording / reproducing apparatus configured as described above will be described with reference to FIGS.

  FIG. 2 is a diagram showing a sequence from turning on the power to displaying a thumbnail screen when a disc medium recorded in accordance with the DVD-VIDEO standard is inserted. When the power of the disk recording / reproducing apparatus is turned on, first, recognition of the disk is started (S1). Next, it is confirmed whether or not the disc recognition is completed (S2). After determining that the disc recognition is completed, the file system (UDF) on the disc medium is read (S3). After the reading of the file system is completed, the presence / absence of a thumbnail information table in the nonvolatile memory 10 described later is confirmed (S4). If the thumbnail information table is stored, the process proceeds to S5, and if not stored, the process proceeds to S10.

  First, a case where the thumbnail information table is not stored will be described. When the disk medium is removed from the disk recording / reproducing apparatus, the thumbnail information table in the nonvolatile memory is deleted. Therefore, the thumbnail information table is not stored mainly when it is started up only after the disk medium is replaced. In such a case, first, a VMGI (Video Manager Information Table) is read from the disk medium (S10). Next, the recording position of VTSI (Video Title Set Information) is specified from the read VMGI information and read (S11). Next, since it is possible to specify the recording position of the navigation pack from the VTSI information, the navigation pack is read in S12. By reading the navigation pack, it is possible to specify the encoding data recording start position and the encoding data recording size to be converted into thumbnail-displayed video data. Therefore, in S13, the encoded data to be converted from the disk medium into thumbnail-displayed video data. Then, in step S14, the thumbnail information table is updated.

  As shown in FIG. The encoded data recording start position to be converted into thumbnail display video data, and the size of the encoded data. The data size of the thumbnail information table is the thumbnail number. Is 2 bytes (capable of holding up to 65536 thumbnail information), the encoded data recording start position to be converted into thumbnail display video data is 4 bytes, the size of the encoded data is 4 bytes, and the data amount per thumbnail is 10 bytes.

  Therefore, for example, even when storing 100 pieces of thumbnail information, the data size is as very small as 1000 bytes. The nonvolatile memory 10 stores firmware to be executed by the system controller 9. For example, a capacity of about 8 to 16 MB is required to store the firmware, so that the capacity for storing 1000-byte thumbnail information is sufficient. It is possible to secure. Therefore, it is not necessary to separately provide a non-volatile memory for storing the thumbnail information table, and there is no need for cost increase.

  After updating the thumbnail information table in S14, the encoded data read in S13 is converted into thumbnail video data, for example, JPEG, and a thumbnail is generated. In S16, it is confirmed whether or not the generation of all thumbnail images to be displayed is completed. If not, the encoded data for generating the next thumbnail is the same VTS as the encoded data of the previously generated thumbnail. It is confirmed whether or not it is located in (Video Title Set) (S17). If it is not located in the same VTS (Video Title Set), it is necessary to newly read VTSI (Video Title Information), so the process returns to S11 to read VTSI (Video Title Set Information) from the disk medium. I do.

  If it is determined in S17 that they are located in the same VTS (Video Title Set), the process returns to S12 to read the navigation pack from the disk medium.

  The sequence is repeated until it is determined that the generation of all thumbnail images to be displayed in S16 is completed. After the generation of thumbnail images is completed, the thumbnail information table created in S14 is stored in the nonvolatile memory (S18). In the sequence, the VMGI (Video Manager Information) of S10, the VTSI (Video Title Set Information) of S11, and the Navigation Pack of S12 are recorded not at continuous positions on the disk medium, but at separate positions. This is a process that requires a long head movement operation and takes a very long time to complete reading.

  Next, a sequence when the thumbnail information table in the nonvolatile memory 10 is stored in S4 will be described. In step S5, the thumbnail information table is read from the nonvolatile memory 10, and in step S6, the encoded data recording start position to be converted from the thumbnail information table to the video data for thumbnail display and the recording size of the encoded data are acquired. Using the information obtained in S6, the encoded data is read from the disk medium in S7, and the read encoded data is converted into thumbnail video data such as JPEG in S8 to generate a thumbnail. In S9, it is confirmed whether or not the generation of all thumbnail images to be displayed is completed. If not completed, the process returns to S6 and repeats the sequence of S6 to S9.

  Next, a sequence from power-on to displaying a thumbnail screen when a disc medium recorded in accordance with the DVD-VR standard is inserted will be described with reference to FIG. When the power of the disk recording / reproducing apparatus is turned on, first, recognition of the disk is started (S19). Next, it is confirmed whether or not the disk recognition is completed (S20). After determining that the disk recognition is completed, the file system (UDF) on the disk medium is read (S21). After the reading of the file system is completed, the presence / absence of the thumbnail information table in the nonvolatile memory 10 is confirmed (S22). If the thumbnail information table is stored, the process proceeds to S23, and if not stored, the process proceeds to S28.

  First, a case where the thumbnail information table is not stored will be described. In order to specify the encoding data recording start position and the encoding data recording size to be converted into thumbnail-displayed video data, first, VR_MANAGER. Read the IFO. In step S29, encoded data to be converted into thumbnail display video data is read. In step S30, the thumbnail information table is updated. The thumbnail information table is the same as that shown in FIG. After updating the thumbnail information table in S30, the encoded data read in S31 is converted into thumbnail video data, such as JPEG, to generate a thumbnail. In S32, it is confirmed whether or not the generation of all thumbnail videos to be displayed is completed. If not, the process returns to S29 to read the encoded data to be converted into the video data for thumbnail display.

  The sequence is repeated until it is determined that the generation of all thumbnail images to be displayed in S32 is completed. After the generation of thumbnail images is completed, the thumbnail information table created in S30 is stored in the nonvolatile memory 10 (S33). . In the sequence, the VR_MANGR. Reading the IFO requires a head movement operation of the disk medium, and takes time to complete the reading.

  Next, a sequence when the thumbnail information table in the nonvolatile memory 10 is stored in S22 will be described. In step S23, the thumbnail information table is read from the nonvolatile memory 10, and in step S24, the encoded data recording start position to be converted into thumbnail-displayed video data and the encoded data recording size are acquired.

  In S25, the encoded data is read from the disk medium using the information acquired in S24, and the read encoded data is converted into thumbnail video data such as JPEG in S26 to generate a thumbnail. In S27, it is confirmed whether or not the generation of all thumbnail images to be displayed is completed. If not completed, the process returns to S24 and repeats the sequence of S24 to S27.

  As described above, by using the thumbnail information table stored in the non-volatile memory 10, in a disk medium recorded in the DVD-VIDEO standard, VMGI (Video Manager Information), VTSI (Video Title Information), and Navigation Pack are used. It is possible to specify the encoding data recording start position for converting into video data of thumbnail display without reading the image data, and the recording size of the encoding data. In a disc medium recorded in the DVD-VR standard, VR_MANGR. It is possible to specify the encoding data recording start position and the recording size of the encoding data to be converted into thumbnail-displayed video data without reading the IFO, and the time for reading the data from the disk medium is shortened, and it is very fast. Thumbnails can be displayed.

  The thumbnail information table stores only the encoding data recording start position to be converted into thumbnail-displayed video data and the recording size of the encoding data, and should be used in common for both the DVD-VIDEO standard and the DVD-VR standard. Is possible.

  Further, by storing in the nonvolatile memory 10, the information in the thumbnail information table is retained even when the power is turned off, and can be used when the power is turned on next time.

  The disc recording / reproducing apparatus according to the present invention has an advantageous effect that the time from the power-on to the completion of the thumbnail display of the video data recorded on the disc medium can be shortened.

  Further, the memory for storing the thumbnail information table can be shared with the non-volatile memory storing the firmware of the system controller, and the hardware resources in the disk recording / reproducing apparatus can be used efficiently.

1 is an overall configuration diagram of a disc recording / reproducing apparatus in Embodiment 1 of the present invention. Thumbnail display flow chart when a DVD-VIDEO standard disc medium is inserted in Embodiment 1 of the present invention Thumbnail display flow chart when a DVD-VR standard disc medium is inserted in Embodiment 1 of the present invention Configuration diagram of thumbnail information table in Embodiment 1 of the present invention Thumbnail display flowchart in a conventional disc recording / reproducing apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc medium 2 Spindle motor 3 Optical pick-up 4 Servo control part 5 Amplifier 6 Signal processing part 7 Decoder 8 Memory 9 System controller 10 Non-volatile memory 11 Encoder 12 Power control part 13 Input / output control part 14 Thumbnail information generation part 15 Thumbnail information recording 15 Part 16 Thumbnail information detection part

Claims (4)

A disk medium, a decoder for reproducing moving image data recorded on the disk medium, a thumbnail image generating stage for generating a thumbnail image from a predetermined frame image of the moving image data, and a nonvolatile memory for storing various data In a disk recording / reproducing apparatus equipped with a memory,
A thumbnail information generator for generating thumbnail information from the playback control information recorded on the disc medium;
A thumbnail information recording unit for storing the thumbnail information in the nonvolatile memory;
A thumbnail information detection unit for detecting whether the thumbnail required information is stored in the nonvolatile memory;
When the thumbnail information detection unit determines that there is no thumbnail information in the nonvolatile memory, the thumbnail information generation unit generates thumbnail information and the thumbnail information recording unit controls to record the thumbnail information in the nonvolatile memory A disk recording apparatus comprising a controller unit. 2. The disc recording apparatus according to claim 1, wherein the thumbnail information includes a predetermined frame address in the moving image data and the predetermined frame data size. 3. The disc recording apparatus according to claim 2, wherein the thumbnail information generating unit acquires the thumbnail information from a navigation pack of the DVD-VIDEO standard. The western part of the thumbnail information property is the VR_MANGR. 3. The disk recording apparatus according to claim 2, wherein the thumbnail information is acquired from an IFO file.

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