JP2007097015A - Reproducing apparatus, recording and reproducing apparatus, data processing method, and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of providing comfortable reproduction operations by newly generating an entry point independently of the presence of the entry point attached in advance to moving picture data in reproducing the moving picture data recorded by another apparatus. <P>SOLUTION: A recording and reproducing apparatus 300 disclosed herein uses processing of a decoder 8 or the like to reproduce an MPEG stream of a title recorded by the other apparatus, uses the MPEG stream decoded by a decoder 88 whose processing speed is faster than that of the decoder 8 to extract a characteristic point prior to the reproduction and generates entry point information on the basis of the characteristic point. The apparatus 300 utilizes the generated entry point information to provide comfortable reproduction operations even when the other apparatus records the entry point information with lower accuracy to the MPEG stream. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a playback device capable of playing back moving image data, a recording / playback device capable of recording and playing back the moving image data, a data processing method for processing the moving image data, and a program thereof.

  In recent years, DVD (Digital Versatile Disc) and Blu-ray optical discs, playback devices that can play back moving image data recorded on semiconductor memory, and HDD (Hard Disk Drive) that receives broadcast moving image data In addition, recording / reproducing apparatuses capable of recording on the optical disc and the semiconductor memory and reproducing the recorded moving image data are widely used.

In the recording / playback apparatus, a characteristic scene is extracted from the moving image data to be recorded, and for example, a transition between a CM (Commercial Message) and a program main part or a scene change is extracted. In some cases, a plurality of sections (chapter) can be created for moving image data by attaching segmented position information called entry points (indexes). For example, in Patent Document 1 below, PID (Program Identification) information for identifying data included in the digital broadcast signal is extracted from the received digital broadcast signal, and the CM is detected by the change in the PID, A technique for indexing detection points is described. In addition, there is a case where chapters are created by adding entry points at equal intervals at predetermined intervals such as 15 seconds and 30 seconds without extracting characteristic scenes. By creating such a chapter, it is possible to reproduce moving image data in units of chapters.
JP 2003-32598 A (paragraphs [0012] to [0016])

  By the way, in the reproducing apparatus and the recording / reproducing apparatus, moving image data recorded on the optical disk, semiconductor memory, HDD or the like by another apparatus is inserted into the optical disk or semiconductor memory, or a USB (Universal Serial Bus) or LAN. (Local Area Network) or the like may be input from the outside and reproduced.

  However, when reproducing moving image data with an entry point (index) as described in Patent Document 1 described above in another device, the entry point was added under any conditions by the other device. It is difficult to recognize whether the entry point is attached to the other device. Therefore, for example, even when the accuracy of the entry point attached by another device is poor and the scene change or the like is not accurately reflected, the chapter movement must be performed using the inaccurate entry point. Further, in other devices, when chapters are attached at regular intervals at predetermined time intervals as described above, chapter movement based on a scene change or the like cannot be performed. Further, even if no entry point is added to the moving image data in another apparatus, even chapter movement cannot be performed. As described above, in the case of following the entry point added in another device, the result is that the convenience of the user is remarkably lacking.

  In view of the circumstances as described above, the object of the present invention is to create a new entry when reproducing moving image data recorded by another device, regardless of the presence or absence of an entry point previously attached to the moving image data. It is an object of the present invention to provide a playback device, a recording / playback device, a data processing method, and a program thereof that can generate a point and perform a comfortable playback operation.

  In order to solve the above-described problems, a playback device according to a main aspect of the present invention is a playback device capable of playing back moving image data, and is an input for inputting the moving image data recorded by a device other than the playback device. Means for reproducing the input moving image data, and generating means for generating first entry point information for dividing the moving image data into a plurality of sections during reproduction of the moving image data It comprises.

  Here, the moving image data is, for example, a removable optical disk such as a DVD (DVD-Video, DVD-RAM, DVD-R, DVD-RW, DVD + R, DVD + RW, etc.), Blu-ray disc, CD (Compact Disc), etc. For example, moving image data of a broadcast program recorded in a semiconductor memory such as a flash memory, moving image data shot by a recording device such as a digital camera or a digital video camera, and the like. The section is referred to as a so-called chapter, and the entry point is a sectioning position of the section. The input means includes, for example, an optical disk drive, a semiconductor memory interface between the semiconductor memory and the playback device, a USB interface for connecting the digital camera and the playback device, and an IEEE (for connecting the digital video camera and the playback device). Institute of Electrical and Electronic Engineers) 1394 interface, an interface for connecting other devices (for example, PC, etc.) and playback devices via LAN.

  According to this configuration, since the entry point information can be newly generated for any moving image data recorded by any device other than the playback device, the newly generated segment position information By using this to move the playback section, it is possible to perform comfortable playback of moving images.

  According to an aspect of the present invention, in the playback device, the generation unit extracts feature point information from the moving image data being played back, and obtains position information where the feature point information exists as the first information. It may be generated as entry point information.

  The characteristic point information is characteristic scene information such as a scene change in moving image data and a change between a commercial and a program main part. As a result, it is possible to perform a comfortable playback operation by moving the playback section using the entry point information generated based on the feature point information, regardless of the moving image data recorded by any device. Become.

  According to an aspect of the present invention, in the playback device, the input moving image data includes a second entry point for dividing the moving image data into a plurality of sections by a device other than the playback device. Information is added, and the playback apparatus further includes means for inputting a user operation for moving from the first section to the second section during playback of the moving image data, The reproduction means refers to the first entry point information with priority over the second entry point information when the user operation is input, and the second section based on the first entry point. It is possible to move to and reproduce the moving image of the second section.

  The second entry point information may be generated and added by extraction of the feature point information, or may be added at regular intervals at a predetermined time interval regardless of the feature point information. When the user operation is input, priority is given to the first entry point information over the second entry point information. For example, the second entry point information is added at regular intervals regardless of the feature point information. The feature point information is newly detected and generated even if the feature point information is added or the feature point extraction accuracy is low and the scene change is overlooked The section can be moved using the first entry point information with high accuracy, and a comfortable reproduction operation can be performed.

  According to an aspect of the present invention, in the playback device, the playback means includes a first decoder that decodes the moving image data to play back the input moving image data, and the generation The means may include a second decoder for decoding the moving image data in order to extract the feature point information.

  Thus, by separately providing a first decoder for reproducing the moving image and a second decoder for extracting the feature point information, for example, the reproduction stop state of the moving image data such as pause or stop Regardless, feature point information can be extracted.

  According to an aspect of the present invention, in the reproducing apparatus, the first decoder has a first decoding processing speed, and the second decoder has a second speed higher than the first decoding processing speed. It may have a decoding processing speed.

  Thus, the feature point information can be extracted and the first entry point can be generated prior to the moving image data reproduction process, so that even if the moving image data being reproduced is not reproduced to the end, the first entry point is generated. The playback section of the moving image data can be moved based on the first entry point.

  According to an aspect of the present invention, the playback device further includes a storage unit that records the generated first entry point information in association with the input moving image data, the playback unit including: Each time the moving image data is input and the user operation is input, the moving image moves to the second section based on the stored first entry point information corresponding to the moving image data. Data may be played back.

  Thus, for example, even if a medium such as an optical disk on which moving image data is recorded is once taken out from the reproducing device, the first entry point information is stored, and the medium is inserted again into the reproducing device and the moving image is recorded. Since the section can be moved using the stored first entry point information when data is input, the first entry point information for the user is as if the first entry point information is on the medium such as the optical disc. The moving operation can be performed on the moving image data as if it had been added.

  According to an aspect of the present invention, the moving image data is recorded on a disk-shaped or card-shaped recording medium, and the playback apparatus determines whether the recording medium is a rewritable recording medium. Means for determining, and means for updating the second entry point information recorded on the recording medium to the generated first entry point information when it is determined that the recording medium is rewritable; May further be provided.

  The disk-shaped or card-shaped recording medium is an optical disk such as the above-described DVD or Blu-ray disk, a flash memory, or the like. As a result, when the accuracy of the second entry point information recorded on the recording medium is low, the information is updated to the first entry point information with high accuracy, and thereafter, for example, in other playback devices, etc. The first entry point information can be used.

  A recording / reproducing apparatus according to another aspect of the present invention is a recording / reproducing apparatus capable of recording and reproducing moving image data, and receiving means for receiving the broadcasted first moving image data; Input means for inputting the second moving image data recorded by a device other than the recording / reproducing device, and a position where the feature point information is extracted from the received first moving image data and the feature point information exists Generating information as first entry point information for dividing the first moving image data into a plurality of sections, and extracting the feature point information from the input second moving image data; Generating means for generating position information where the feature point information exists as second entry point information for dividing the second moving image data into a plurality of sections;

  With this configuration, means for generating entry point information by extracting feature points from the received first moving image data may be used as means for generating entry point information of the input second moving image. It can be combined. Thereby, an increase in cost can be suppressed as compared with the case where the generation unit is provided separately, and the user can also record the second moving image data recorded by a device other than the recording / reproducing device. Using the same entry point information as the entry point information generated for the first moving image data recorded in step 2, the second moving image data can be moved during the reproduction of the second moving image data. It is possible to perform a reproduction operation as if the image data was recorded by the recording / reproducing apparatus.

  A data processing method according to another aspect of the present invention is a method in which a playback device capable of playing back moving image data processes the moving image data, and the moving image data recorded by a device other than the playback device is processed. An input step; a step of reproducing the input moving image data; and a step of generating first entry point information for dividing the moving image data into a plurality of sections during the reproduction of the moving image data. It comprises.

  A data processing method according to still another aspect of the present invention is a method in which a recording / playback apparatus capable of recording and playing back moving image data processes the moving image data, and the first moving image broadcasted Receiving the image data; inputting the second moving image data recorded by a device other than the recording / reproducing device; extracting feature point information from the received first moving image data; The position information where the feature point information exists is generated as first entry point information for dividing the first moving image data into a plurality of sections, and from the input second moving image data Extracting the feature point information and generating position information where the feature point information exists as second entry point information for dividing the second moving image data into a plurality of sections. Comprising a.

  A program according to another aspect of the present invention includes a step of inputting the moving image data recorded by a device other than the reproducing device to a reproducing device capable of reproducing moving image data, and the input moving image data. The step of reproducing and the step of generating first entry point information for dividing the moving image data into a plurality of sections during the reproduction of the moving image data are executed.

  A program according to still another aspect of the present invention includes a step of receiving broadcasted first moving image data in a recording / reproducing device capable of recording and reproducing moving image data, and a method other than the recording / reproducing device. Inputting the second moving image data recorded by the device, extracting the feature point information from the received first moving image data, and determining the position information where the feature point information exists as the first moving image data. The moving image data is generated as first entry point information for dividing the moving image data into a plurality of sections, and the feature point information is extracted from the input second moving image data. Generating existing position information as second entry point information for dividing the second moving image data into a plurality of sections.

  As described above, according to the present invention, when moving image data recorded by another device is reproduced, a new entry point is generated regardless of the presence or absence of the entry point previously attached to the moving image data. Thus, a comfortable reproduction operation can be performed.

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

(First embodiment)
First, a first embodiment of the present invention will be described. FIG. 1 is a block diagram showing the configuration of the playback apparatus 100 in the present embodiment. The playback device 100 can input and play back moving image data recorded in a device other than the playback device 100 (for example, another recording / playback device).

  As shown in the figure, a playback apparatus 100 includes a CPU (Central Processing Unit) 1, a RAM (Random Access Memory) 2, an operation input unit 3, a feature point extraction unit 4, an optical disk drive 5, a buffer controller 6, and a demultiplexer 7. An AV decoder 8, an OSD (On Screen Display) 9, a D / A (Digital / Analog) converter 10, and a D / A converter 11.

  The CPU 1 appropriately accesses the RAM 2 and the like as necessary, and controls the entire blocks of the playback device 100. The RAM 2 is a memory that is used as a work area for the CPU 1 and temporarily holds an OS, a program, processing data, and the like.

  The operation input unit 3 includes buttons, switches, keys, a display for operation confirmation, a light receiving unit for infrared signals transmitted from a remote controller (not shown), and the like. Is output to the CPU 1.

  The optical disc drive 5 reads moving image data (hereinafter referred to as an MPEG stream) recorded on an optical disc 12 detachable by a device other than the playback device 100 after being compressed by, for example, an MPEG (Motion Picture Expert Group) method, and is buffered. Input to the controller 6. The optical disc 12 is, for example, a DVD disc (DVD-Video, DVD-RAM, DVD-R, DVD-RW, DVD + R, DVD + RW, etc.), a Blu-ray disc, or the like. The moving image data compression method is not limited to MPEG, and other compression methods may be used.

  The buffer controller 6 controls the read timing and data amount of the MPEG stream continuously input from the optical disk drive 5, and continuously outputs the MPEG stream read intermittently from the optical disk drive to the demultiplexer 7.

  That is, while the optical disk drive 5 is performing a seek operation, data cannot be read, while the demultiplexer, 7 and AV decoder expect continuous MPEG stream output. The MPEG stream is buffered, and read timing control in accordance with the characteristics of the optical disk drive 5 is performed.

  The demultiplexer 7 separates the multiplexed MPEG stream input from the buffer controller 6 into an MPEG audio stream and an MPEG video stream, and outputs them to the AV decoder 8.

  The AV decoder 8 performs a decoding process on the separated MPEG audio stream and MPEG video stream to convert them into a digital audio signal and a digital video signal, and converts the digital audio signal to the D / A converter 10 and also to the digital video signal. Is output to OSD9.

  The MPEG audio stream and MPEG video stream before decoding by the AV decoder 8 or the digital audio signal and digital video signal after decoding by the AV decoder 8 are input to the feature point extraction unit 4. Details of the feature point extraction unit 4 will be described later.

  The D / A converter 10 converts the digital audio signal input from the AV decoder 8 into an analog audio signal, and outputs it to a speaker (not shown) for reproduction.

  The OSD 9 generates graphics or the like to be displayed on a display (not shown), performs synthesis processing and switching processing with the digital video signal, and outputs the processed video data to the D / A converter 11.

  The D / A converter 11 converts the digital video signal subjected to the graphic processing by the OSD 9 into an analog video signal (NTSC (National Television Standards Committee) signal), and outputs and displays it on a display (not shown).

  The feature point extraction unit 4 extracts feature points from each MPEG stream before decoding by the AV decoder 8 or each digital signal after decoding by the AV decoder.

  Specifically, the feature point extraction unit 4 selects, for example, scene change, switching between CM and the main program, highlight scene, and telop information from each of the above MPEG streams or digital signals existing as each title (program). Feature points such as presence / absence and volume level are extracted. The CPU 1 generates position information and the like of the frame in which those feature points exist as entry point information, sets the frame as the first frame of each chapter, and divides each title into a plurality of chapters. When the entry point is added, the title can be reproduced from the top frame (that is, in units of chapters). The generated entry point information is stored in the RAM 2 for each title, and is used whenever there is an operation such as chapter movement from the user via the operation input unit 3.

  In addition, an MPEG stream of digital broadcasting includes a PSI / SI (Program Specific Information / Service Information) signal for transmitting a data broadcast signal, EPG (Electronic Program Guide) data, and the like in addition to an audio stream and a video stream. Although included, these data may be used for feature point extraction.

  A more specific method for generating the entry point will be described. For example, when a scene change is detected, each frame is based on the luminance component and audio information for each frame constituting each MPEG stream or each digital signal. A feature point is detected, a characteristic scene is extracted by comparing changes and magnitudes of the feature point of each frame, and the frame of the scene is extracted as an entry point. In addition, when detecting the switching between the CM and the program main part, the stereo / monaural switching position of the audio signal is detected, or the volume level (the volume of the CM section is higher than that of the program main part) is detected. Then, the switching position is extracted as an entry point.

  Also, when audio information is used as one parameter for detecting a scene change, when a predetermined threshold is set and the average power of the predetermined section is larger than the threshold, the section is set as a voice characteristic section. An entry point may be added to the start time position. In addition, because human speech has consonants, vowel intervals, breathing, etc., it has a feature that the continuity of the section over a predetermined power is shorter than music, etc., so a time threshold is set and the average continuation over a predetermined power If the time length is smaller than the time threshold, the section may be added as a speaker section at the start time position of the section.

  Also, when detecting telop information, for example, each frame is divided into several areas, paying attention to macroblocks in a predetermined area, the number of edges is measured, and the threshold of the number of edges set in advance is exceeded. If it is larger, it is determined that a telop has appeared. The number of edges can be measured by a method using an AC coefficient in an MPEG video stream or a method such as multi-resolution analysis in wavelet analysis.

  When each MPEG stream before the decoding process by the AV decoder 8 is used for the feature point extraction process, the amount of data to be processed can be reduced as compared with the case where each digital signal after the decoding process is used. There is an advantage that the capacity of the buffer area can be reduced. Therefore, normally, each decoded digital signal may be used for feature point extraction, and each MPEG stream before decoding may be used when there is not enough buffer capacity.

  When feature points are extracted based on the EPG data, text data in the EPG data is easier to process before decoding. Therefore, the data is output to the feature point extraction unit before decoding. It may be.

  Next, the entry point information will be described. FIG. 2 shows entry point information (FIGS. (A) and (b)) that can be added in devices other than the playback device 100, and entry point information (FIG. (C)) generated in the playback device 100. FIG.

  FIG. 6A shows a case where entry point information is added at regular intervals of a predetermined time interval (for example, 15 seconds, 30 seconds, etc.) in a device other than the playback device 100. In this case, it is inconvenient to search for a user's desired scene because the chapter can only be moved at predetermined intervals.

  FIG. 5B shows a case in which entry point information is added by extracting feature points (in this case, switching between CM and the main program) in an apparatus other than the playback apparatus 100. However, since the accuracy of feature point extraction is low, the switching between the first CM 21a and the main program 22a, the switching between the third CM 21c and the main program 22c, and the switching between the main program 22c and the fourth CM 21d cannot be extracted. . In addition, there is a deviation in the extraction of the switching position between the second CM 21b and the main program 22b. If there are omissions or deviations in the extraction, even if feature points are extracted and entry point information is generated, the result may be inconvenient for the user.

  FIG. 5C shows entry point information that can be generated by the playback apparatus 100 according to the present embodiment. As shown in the figure, the switching between the main program and the CM is surely extracted, and highly accurate entry point information is added. By using the highly accurate entry point information, the user can A comfortable chapter movement operation can be performed. In the present embodiment, the moving image data recorded on the optical disc 12 by adding entry point information with low convenience or low accuracy as shown in FIGS. Even if it exists, comfortable reproduction | regeneration operation is enabled by regenerating the highly accurate entry point information like the said figure (c).

  As described above, the playback apparatus 100 generates entry point information by extracting video feature points such as scene changes and telops (including title calls, end rolls, etc.) as well as switching between CM and the main program. Of course, it is also possible.

  Next, the operation of the playback device 100 in this embodiment will be described.

  FIG. 3 is a flowchart showing a flow of processing in which the playback apparatus 100 generates entry point information in the present embodiment. As shown in the figure, first, when the optical disk 12 is inserted into the optical disk drive 5, as described above, the buffer controller 6, the demultiplexer 7, the AV decoder 8, the OSD 9, the D / A converter 10, the D / A The title recorded on the optical disk 12 is reproduced by the processing of the converter 11 and a display and a speaker (not shown) (step 31).

  Subsequently, the CPU 1 determines whether or not entry point information has already been generated by the processing of the feature point extraction unit 4 or the like (step 32).

  If the entry point information has already been generated (YES in step 32), the user is made to use the generated entry point information without performing the entry point information generation process.

  If the entry point information has not yet been generated (NO in step 32), the feature point extraction unit 4 extracts the feature point from the MPEG stream of the title by the above-described method during the title reproduction (step 33). The CPU 1 generates entry point information based on the extracted feature point information (step 34). The entry point information generation process will be described in detail with reference to FIG.

  FIG. 4 is a diagram illustrating a process transition when the playback apparatus 100 generates entry point information in the present embodiment.

  FIG. 5A shows the extraction status of entry point information at time t when the optical disc 12 is inserted into the playback apparatus 100 and title playback is started. From the time t, the feature point extraction unit 4 starts the feature point extraction process, but since the feature point extraction is not performed at this time, the entry point information recorded by another device can only be used.

  FIG. 5B shows the entry point information extraction status at the time when α has elapsed from the time t. As shown in the figure, the title has been reproduced up to the main program 22a, and the feature point extraction unit 4 also synchronizes with the reproduction and the feature points existing up to the reproduced location (start position of the first CM 21a, CM 21a). And the program main part 22a) are extracted, and entry point information is generated at the two positions.

  FIG. 5C shows the entry point information extraction status at the time when β has elapsed from the time t + α. As shown in the figure, in addition to the entry point information generated up to the time t + α, four more entry point information are generated in synchronization with the reproduction status of the title.

  In this way, the feature point extraction unit 4 extracts feature points in synchronization with the reproduction status of the title, and generates entry point information. The generated entry point information is stored in the RAM 2 (step 35) and is used every time a chapter movement operation is input from the user via the operation input unit 3. The feature point extraction unit 4 repeats the above operation every time the MPEG stream recorded on the optical disc 12 is reproduced.

  In the present embodiment, when the entry point information is generated, the position where the feature point extraction processing is performed and the playback position are synchronized. Therefore, in order to move to a chapter belonging to a location that has not been played back, The entry point information recorded by other devices will be used, but when moving to a chapter before the already played part, the newly generated entry point information can be used. In addition, when the title is played back to the end and then played again, entry point information is generated for all parts of the title. Therefore, chapter movement is performed using the generated entry point information. It can be carried out.

  Next, the operation when the playback apparatus 100 uses the entry point information generated as described above will be described. FIG. 5 is a flowchart showing the flow of the operation.

  As shown in the figure, when the reproduction of the MPEG stream recorded on the optical disk is started (step 51), the CPU 1 enters a standby state for an operation input from the user (step 52).

  If there is an operation input from the user (YES in step 52), it is determined whether or not the operation is an operation using entry point information, that is, a chapter moving operation (step 53).

  If the user operation is not a chapter movement operation (NO in step 53), it is further determined whether or not the user operation is an input of a command requesting to stop playback of the title (step 57). In step 57 (YES), the reproduction of the title is stopped (step 58) and the process ends. If it is not a playback stop command (NO in step 57), the process returns to the standby state for user operation (step 52).

  If the user's operation is a chapter moving operation (YES in step 53), the CPU 1 determines whether entry point information has already been generated for the title being reproduced (step 54). Since the generated entry point information is stored in the RAM 2 in association with the ID for identifying each title, the CPU 1 reads the ID of the title being reproduced from the optical disc 12, and the entry corresponding to the ID. It is determined whether or not there is entry point information generated depending on whether or not there is point information.

  If entry point information has been generated (YES in step 54), chapter movement is performed based on the entry point information (step 55). If entry point information has not been generated (NO in step 54), chapter movement is performed using entry point information recorded by another apparatus as shown in FIG. 4A (step 56). ).

  As described above, when an MPEG stream recorded on the optical disc 12 is played back by a device other than the playback device 100, entry point information can be newly generated, and chapter movement can be performed based on the entry point information. Even when the accuracy of the entry point information recorded by a device other than the playback device 100 is low, the entry point information with high accuracy can be reconstructed and a more comfortable playback operation can be performed.

  The generated entry point information is stored in the RAM 2 and used whenever the optical disk 12 is inserted and played back. However, when the optical disk 12 is rewritable, it is recorded by the other device. It is also possible to update the entry point information to the generated entry point information. FIG. 6 is a flowchart showing an operation flow of the playback apparatus 100 in this case.

  As shown in the figure, first, when the CPU 1 generates entry point information (step 61), the CPU 1 determines whether or not the optical disk 12 inserted in the optical disk drive 5 is rewritable (step 62).

  If it is rewritable (YES in step 62) (for example, DVD-RW, DVD + RW, etc.), it is confirmed with the user whether or not the entry point information is to be updated (step 63). Specifically, a pop-up screen that asks the user whether or not to update the entry point information is displayed on the display.

  When the user inputs an operation input for updating the entry point information via the operation input unit 3 (step 63), the generated entry point information is read from the RAM 2, written to the optical disc 12, and the entry point information is written. Information is updated (step 64).

  If the optical disk 12 is not rewritable (NO in step 62), and if there is an operation input not updating the entry point information (NO in step 63), the process is terminated without updating.

  With the above operation, even when the optical disc 12 is played back on a playback device other than the playback device 100, the chapter moving operation can be performed using the entry point information newly generated by the playback device 100.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 7 is a block diagram showing the configuration of the recording / reproducing apparatus 200 in the present embodiment. In the present embodiment, the same reference numerals are given to portions having the same configuration as that of the playback device 100 in the first embodiment, and the description will be omitted or simplified. Similarly to the playback apparatus 100 of the first embodiment, the recording / playback apparatus 200 of the present embodiment can generate entry point information by extracting feature points from moving image data such as an MPEG stream being played back. is there.

  The recording / reproducing apparatus 200 in the present embodiment includes a digital tuner 15, an IEEE (Institute of Electrical and Electronic Engineers) 1394 I / F (interface) 16, an Ethernet (registered trademark) / in addition to the reproducing apparatus 100 in the first embodiment. Each interface includes a wireless LAN (Local Area Network) interface 17, a USB (Universal Serial Bus) interface 18 and a flash memory interface 19, an HDD (Hard Disk Drive) 14, a buffer controller 13 for the HDD, and a selector 20. Yes.

  Under the control of the CPU 1, the digital tuner 15 selects a specific channel of the digital broadcast via an antenna (not shown), receives the MPEG stream, demodulates the broadcast data such as the MPEG stream, and the like via the selector 20. The data is output to the demultiplexer 7 for reproduction, recorded on the optical disk 12 inserted into the optical disk drive 5 via the buffer controller 6, or recorded on the HDD 14 via the buffer controller 13.

  The IEEE 1394 interface 16 can be connected to an external device such as a digital video camera. For example, data such as an MPEG stream shot and recorded by a digital video camera can be reproduced in the same manner as the MPEG stream received by the digital tuner 15 or can be recorded on the optical disk 12 or the HDD 14.

  The Ethernet (registered trademark) / wireless LAN interface 17 inputs, for example, an MPEG stream recorded on a PC or other recording / reproducing apparatus via Ethernet (registered trademark) or wireless LAN. The MPEG stream can also be reproduced and recorded on the optical disk 12 or the HDD 14.

  The USB interface 18 inputs data such as an MPEG stream from an external storage device such as a USB memory or a device such as a digital camera via the USB. The MPEG stream and the like can also be played back and recorded on the optical disc 12 or the HDD 14.

  The flash memory interface 19 is connected to, for example, a memory card (for example, a memory card) incorporating a flash memory, and inputs data such as an MPEG stream recorded in the flash memory. Data such as the MPEG stream can also be reproduced and recorded on the optical disk 12 or the HDD 14.

  The HDD 14 records various programs and data in addition to the MPEG stream on a built-in hard disk, and reads them from the hard disk during reproduction.

  The buffer controller 13 controls the write timing and data amount of data such as an MPEG stream continuously supplied from the digital tuner 15 to the HDD 14 and intermittently writes the data such as the MPEG stream to the HDD 14. Further, the buffer controller 13 controls the read timing and data amount of data such as an MPEG stream recorded on the HDD 14, and continuously supplies data such as an MPEG stream that is intermittently read from the HDD 14 to the demultiplexer 7. To do.

  The selector 20 selects data such as an MPEG stream input from any one of the interfaces, the optical disc drive 5 and the HDD 14 based on a control signal from the CPU 1.

  In the recording / reproducing apparatus 200 configured as described above, in addition to the optical disc 12, when an MPEG stream input via each interface is reproduced, or an MPEG stream recorded on the HDD 14 is reproduced. At this time, the feature point extraction unit 4 can extract the feature points and generate entry point information by the same processing as that of the playback apparatus 100 of the first embodiment.

  In the present embodiment, it is conceivable that the MPEG stream input from each of the interfaces does not have entry point information itself. However, by generating entry point information for such an MPEG stream, It is possible to make the user perform a comfortable reproduction operation.

  Further, since the generated entry point information can be stored not only in the RAM 2 but also in the HDD 14, even when the recording / reproducing apparatus 200 is turned off after the entry point information is generated, When the MPEG stream recorded on each interface, the optical disc 12 and the HDD 14 is reproduced from the next time onward, it is possible to perform a chapter moving operation using the stored entry point information.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  FIG. 8 is a block diagram showing a configuration of the recording / reproducing apparatus 300 in the present embodiment. In the present embodiment, the same reference numerals are given to portions having the same configuration as the recording / reproducing apparatus 200 in the second embodiment, and the description thereof is omitted or simplified.

  The recording / reproducing apparatus 300 in the present embodiment includes an analog tuner 81, an A / D converter 82, an A / D converter 83, an NTSC decoder 84, an AV encoder 85, and a multiplexer 86 in addition to the recording / reproducing apparatus 200 in the second embodiment. , A demultiplexer 87, an AV decoder 88 and a selector 89 are newly provided.

  Under the control of the CPU 1, the analog tuner 81 selects a specific channel for analog broadcasting via an antenna (not shown), receives an analog audio signal and an analog video signal, demodulates each signal, and outputs an analog audio signal. The analog video signal is output to the A / D converter 82 and to the A / D converter 83.

  The A / D converter 82 converts the analog audio signal input from the analog tuner into a digital audio signal and outputs the digital audio signal to the AV encoder 85. Further, the A / D converter 82 outputs a digital audio signal to the selector 89. The digital audio signal is converted into an analog audio signal by the D / A converter 10 and output from a speaker (not shown). Further, the A / D converter 82 also outputs the digital audio signal to the feature point extraction unit 4 to perform feature point extraction processing.

  The A / D converter 83 converts the analog video signal (NTSC signal) input from the analog tuner 81 into a digital NTSC signal and outputs it to the NTSC decoder 84.

  The NTSC decoder 84 decodes the digital NTSC signal, converts it into a digital video signal, and outputs it to the AV encoder 85. Further, the NTSC decoder 84 outputs a digital video signal to the OSD 9. The digital video signal output to the OSD 9 is subjected to graphic processing, converted into an analog video signal by the D / A converter 11, and displayed on a display (not shown). Further, the NTSC decoder 84 also outputs the digital video signal to the feature point extraction unit 4 to perform feature point extraction processing.

  The AV encoder 85 compresses the digital audio signal input from the A / D converter 82 and the digital video signal input from the NTSC decoder 84 in accordance with the MPEG format, and generates an MPEG audio stream and an MPEG video stream, respectively. Output to. The AV encoder 85 also outputs the compressed MPEG audio stream and MPEG video stream to the feature point extraction unit 4 to perform feature point extraction processing.

  The multiplexer 86 multiplexes the MPEG audio stream and the MPEG video stream input from the AV encoder 85, outputs them to the buffer controller 6 or the buffer controller 13 via the selector 20, and records them on the optical disk 12 or the HDD 14.

  The recording / reproducing apparatus 300 in this embodiment is characterized by the digital signal output from the analog tuner 81 via the NTSC decoder 84 and the AV encoder 85 and the digital signal output from the digital tuner 15 via the demultiplexer 87. By inputting to the extraction unit 4 as well, the feature point information is extracted before recording the title on the optical disk 12 or the HDD 14 (even if it is not reproduced) to generate entry point information. It can be recorded. At the same time, for the MPEG stream recorded by another apparatus, the feature point extraction unit 4 can extract the feature point and generate entry point information. That is, by using the same feature point extraction unit 4 at the time of recording and at the time of reproduction, an increase in cost can be suppressed as compared with a case where a new feature point extraction unit is provided for an MPEG stream recorded by another device. it can.

  In addition, the recording / reproducing apparatus 300 in the present embodiment has a digital input signal re-encoding function.

  That is, the MPEG stream received by the digital tuner 15 and the digital signal input from each interface, the optical disc drive 5 and the HDD 14 are input to the demultiplexer 87 via the selector 20 to be converted into a digital audio signal and a digital video signal. After the separation, the data is decoded by the AV decoder 88, and further input to the AV encoder 85 for encoding, whereby the encoding format conversion, the image frame conversion, the bit rate conversion, and the like can be performed. The converted audio stream and video stream are multiplexed by the multiplexer 86 and recorded on the optical disc 12 or the HDD 14.

  In the present embodiment, the AV decoder 88 and the AV decoder 8 are provided. The AV decoder 88 is used when the re-encoding is performed or when the feature point extraction unit 4 performs the feature point extraction process. The AV decoder 8 is used when reproducing a title. That is, by providing separate decoders for feature point extraction and playback, it is possible to perform feature point extraction processing without depending on the playback status (for example, title playback stop, pause, etc.). For example, when the optical disk 12 is inserted into the optical disk drive 5 or the flash memory is inserted into the flash memory I / F, the decoder 88 first performs decoding for feature point extraction even when reproduction is not started. Entry point information can also be generated.

  In this case, the data such as the MPEG stream of each title input from each interface or the optical disc drive 5 or the HDD 14 via the selector is output to the demultiplexer 87 and the demultiplexer 7, respectively.

  The MPEG audio stream and the MPEG video stream separated by the demultiplexer 87 are decoded by the AV decoder 88 and supplied to the feature point extraction unit 4 for use in the feature point extraction process.

  On the other hand, the MPEG audio stream and the MPEG video stream separated by the demultiplexer 7 are decoded by the AV decoder 8, processed by the selector 89 and OSD 9, and converted into analog by the D / A converters 10 and 11, and the speaker and display. Is played.

  In addition, since the AV decoder 88 has a higher decoding processing speed than the AV decoder 8, the title reproduction process and the feature point extraction process are synchronized in the first and second embodiments. On the other hand, feature point extraction processing can be performed prior to title reproduction processing.

  Next, the operation of the recording / reproducing apparatus 300 in this embodiment will be described.

  FIG. 9 is a flowchart showing a flow of processing in which the recording / reproducing apparatus 300 generates entry point information. As shown in the figure, when reproduction of a title input from the optical disk drive 5 or HDD 14 or each interface is started (step 91), it is determined whether there is already generated entry point information (step 92).

  If an entry point has not yet been generated (NO in step 92), the feature point extraction unit 4 performs high-speed decoding processing by the AV decoder 88 from the MPEG stream of the title using the above-described method, and performs reproduction processing. First, feature points are extracted (step 93). The CPU 1 generates entry point information based on the extracted feature point information (step 94). The entry point information generation process will be described in detail with reference to FIG.

  FIG. 10 is a diagram showing a process transition when the recording / reproducing apparatus 300 generates entry point information in the present embodiment.

  FIG. 9A shows the extraction status of entry point information at time t when the playback of the title is started in the recording / playback apparatus 300. From the time t, the feature point extraction unit 4 starts the feature point extraction process, but since the feature point extraction is not performed at this time, the entry point information recorded by another device can only be used.

  FIG. 5B shows the entry point information extraction status at the time when α has elapsed from the time t. The feature point extraction unit 4 uses the digital signal decoded at high speed by the AV decoder 88, so that the feature point extraction unit 4 precedes the title reproduction process performed based on the digital signal output from the AV decoder 8 (that is, has been reproduced). The feature point extraction process can be performed without depending on the playback status such as playback stop or playback pause. In the figure, the title is reproduced up to the program main part 22a, but the feature point extraction processing is performed until the middle of the program main part 22b before the reproduction point, and four entry point information is generated. ing.

  FIG. 5C shows the entry point information extraction status at the time when β has elapsed from the time t + α. As shown in the figure, at this point in time, the title has only been played up to the main program 22c, but the feature point extraction processing has been performed up to the end of the title, generating nine entry point information in total. is doing.

  Thus, by providing the AV decoder 88 for feature point extraction, entry point information can be generated up to a point ahead of the playback point of the title. By using the entry point information, playback is in progress. It is possible to move to the previous chapter in real time.

  The generated entry point information is held in the RAM 2 during the reproduction of the title, and is used every time the user moves the chapter. After the title reproduction is completed, the entry point information is stored in the HDD 14 (step 95) and used every time the title is reproduced from the next time.

  Note that the present invention is not limited to the above-described two embodiments, and it is needless to say that various modifications can be made without departing from the scope of the present invention.

  In the above-described three embodiments, the entry point information is generated every time the title is played back. However, there may be a case where the user wants to directly use the entry point information recorded on the optical disc 12 or the like in another device. Therefore, every time a title is played, the user may select whether or not to generate entry point information for the title.

  In the above-described three embodiments, the example of extracting the switching between the CM and the main program as feature point information and generating entry point information at the switching position has been described. However, for example, whether there is a scene change or a telop Of course, the entry point information may be generated by extracting the feature point information under conditions such as the volume level.

  The recording / reproducing apparatus 300 in the third embodiment described above has two decoders, the AV decoder 88 for extracting feature points and the AV decoder 8 for reproduction. However, the reproducing apparatus 100 in the first embodiment described above. Of course, it does not matter even if it is a form having the two AV decoders.

  In the above-described three embodiments, the present invention is applied to a so-called DVD player type reproducing apparatus and a so-called DVD / HDD recorder type recording / reproducing apparatus. However, it is of course possible to apply the present invention to other apparatuses such as a PC. is there.

1 is a block diagram illustrating a configuration of a playback device 100 according to a first embodiment of the present invention. FIG. 4 is a diagram showing entry point information that can be added in a device other than the playback device 100 and entry point information that can be generated in the playback device 100 in the first embodiment. 6 is a flowchart showing a flow of processing in which the playback apparatus 100 generates entry point information in the first embodiment. It is the figure which showed the transition of the process at the time of the reproducing | regenerating apparatus 100 producing | generating entry point information in 1st Embodiment. 5 is a flowchart illustrating an operation flow when the playback device 100 uses generated entry point information in the first embodiment. 6 is a flowchart showing an operation flow of the playback apparatus 100 when updating entry point information recorded on the optical disc 12 in the first embodiment. It is the block diagram which showed the structure of the recording / reproducing apparatus 200 in the 2nd Embodiment of this invention. It is the block diagram which showed the structure of the recording / reproducing apparatus 200 in the 3rd Embodiment of this invention. It is the flowchart which showed the flow of the process which the recording / reproducing apparatus 300 produces | generates entry point information in 3rd Embodiment. It is the figure which showed the transition of the process at the time of the recording / reproducing apparatus 300 producing | generating entry point information in 3rd Embodiment.

Explanation of symbols

1 ... CPU
2 ... RAM
DESCRIPTION OF SYMBOLS 3 ... Operation input part 4 ... Feature point extraction part 5 ... Optical disk drive 6 ... Buffer controller 8 ... AV decoder 12 ... Optical disk 13 ... Buffer controller 14 ... HDD
DESCRIPTION OF SYMBOLS 15 ... Digital tuner 16 ... IEEE1394 interface 17 ... LAN interface 18 ... USB interface 19 ... Flash memory interface 81 ... Analog tuner 88 ... AV decoder 100 ... Reproducing apparatus 200 ... Recording / reproducing apparatus 300 ... Recording / reproducing apparatus

Claims (12)

A playback device capable of playing back moving image data,
Input means for inputting the moving image data recorded by a device other than the playback device;
Reproduction means for reproducing the input moving image data;
A reproducing apparatus comprising: generating means for generating first entry point information for dividing the moving image data into a plurality of sections during reproduction of the moving image data. The playback device according to claim 1,
The reproducing apparatus extracts feature point information from the moving image data being reproduced, and generates position information where the feature point information exists as the first entry point information. The playback device according to claim 2,
Second entry point information for dividing the moving image data into a plurality of sections by a device other than the playback device is added to the input moving image data,
The playback apparatus further includes means for inputting a user operation for moving from the first section to the second section during playback of the moving image data,
The reproduction means refers to the first entry point information in preference to the second entry point information when the user operation is input, and based on the first entry point, the second entry point information is referred to. A playback apparatus that moves to a section and plays back a moving image in the second section. The playback device according to claim 3, wherein
The reproducing means includes a first decoder for decoding the moving image data in order to reproduce the input moving image data;
The reproducing device includes a second decoder for decoding the moving image data in order to extract the feature point information. The playback apparatus according to claim 4, wherein
The first decoder has a first decoding processing speed;
The playback apparatus, wherein the second decoder has a second decoding processing speed higher than the first decoding processing speed. The playback device according to claim 1,
Storage means for recording the generated first entry point information in association with the input moving image data;
Each time the moving image data is input and the user operation is input, the reproducing means moves to the second section based on the stored first entry point information corresponding to the moving image data. And reproducing the moving image data. The playback device according to claim 3, wherein
The moving image data is recorded on a disk-shaped or card-shaped recording medium,
The playback device
Means for determining whether the recording medium is a rewritable recording medium;
Means for updating the second entry point information recorded on the recording medium to the generated first entry point information when it is determined that the recording medium is rewritable. A reproducing apparatus characterized by the above. A recording / reproducing apparatus capable of recording and reproducing moving image data,
Receiving means for receiving the broadcasted first moving image data;
Input means for inputting second moving image data recorded by an apparatus other than the recording / reproducing apparatus;
A first entry for extracting feature point information from the received first moving image data and dividing the first moving image data into a plurality of sections for position information where the feature point information exists. It is generated as point information, the feature point information is extracted from the input second moving image data, and the position information where the feature point information exists is converted into a plurality of sections. A recording / reproducing apparatus comprising: generating means for generating second entry point information for classification. A reproduction apparatus capable of reproducing moving image data is a method of processing the moving image data,
Inputting the moving image data recorded by a device other than the playback device;
Replaying the input moving image data;
And a step of generating first entry point information for dividing the moving image data into a plurality of sections during the reproduction of the moving image data. A recording / reproducing apparatus capable of recording and reproducing moving image data processes the moving image data,
Receiving the broadcasted first moving image data;
Inputting second moving image data recorded by a device other than the recording / reproducing device;
A first entry for extracting feature point information from the received first moving image data and dividing the first moving image data into a plurality of sections for position information where the feature point information exists. It is generated as point information, the feature point information is extracted from the input second moving image data, and the position information where the feature point information exists is converted into a plurality of sections. And generating as second entry point information for sorting. A data processing method comprising: A playback device that can play back video data
Inputting the moving image data recorded by a device other than the playback device;
Replaying the input moving image data;
Generating the first entry point information for dividing the moving image data into a plurality of sections during the reproduction of the moving image data. In a recording / reproducing apparatus capable of recording and reproducing moving image data,
Receiving the broadcasted first moving image data;
Inputting second moving image data recorded by a device other than the recording / reproducing device;
A first entry for extracting feature point information from the received first moving image data and dividing the first moving image data into a plurality of sections for position information where the feature point information exists. It is generated as point information, the feature point information is extracted from the input second moving image data, and the position information where the feature point information exists is converted into a plurality of sections. And a step of generating as second entry point information for classification.

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