JP2007257773A - Information-reproducing device, information-reproducing method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain suitable reproducing operation in reproducing operation while processing data by a processing unit different from that of the data. <P>SOLUTION: An information-reproducing device 200 is provided with a storage means 407 which stores content data containing each of a first frame, a second frame and a third frame of a first size as two or more internal processing data of a second size; and a control means 408 which controls the storage means to transfer content data by deleting (i) a part (101-2) of the second frame contained in first internal processing data containing the terminal end part of the first frame and (ii) a part (101-1) of the second frame contained in second internal processing data containing the start end part of the third frame. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information recording / reproducing apparatus and method such as a Blu-ray Disc recorder, and a computer program for causing a computer to function as such an information recording / reproducing apparatus.

  There is a DV (Digital Video) method as one of the encoding methods for compressing moving image information, and this encoding method is used in a camcorder or the like using a video cassette. The DV method performs compression in units of frame data (that is, compression within a frame), the bit rate after compression is approximately 25 Mbps, and the compression rate is approximately 1/5.

  In recent years, a DV stream recorded on a tape by a camcorder or the like is taken into a personal computer or a DVD recorder, and after editing such as cut editing, it is dubbed and stored on an information recording medium such as an optical disk. ing. For example, when a DV stream is recorded on a DVD (Digital Versatile Disc), which is one of optical disks, the DV stream cannot be directly recorded on the DVD. Therefore, it is necessary to re-encode the MPEG stream into an MPEG2 program stream and then record it on the DVD. For this reason, image quality is deteriorated due to re-encoding, and editability in units of frames of the DV stream is also impaired. On the other hand, a BD-RE (Blu-ray Disc Rewritable) which is a recording type Blu-ray Disc can directly record a DV stream in addition to recording an MPEG2 transport stream. Therefore, there is no deterioration in image quality due to re-encoding, and editability in units of DV streams is not impaired.

DV stream signals can be input and output via an IEEE 1394 digital interface.
A Blu-ray Disc recorder, which is a specific example of an information recording / reproducing apparatus, can input a DV stream signal via, for example, an IEEE 1394 digital interface.

  For example, when the DV stream conforms to the NTSC (National Television System Committee) system, one video frame has a size of 120,000 bytes. For example, when the DV stream conforms to a PAL (Phase Alternation by Line) system, one video frame has a size of 144000 bytes. On the other hand, as a data processing unit in the information recording / reproducing apparatus, a processing unit having a size different from these sizes is often used. In general, for example, a data processing unit in the information recording / reproducing apparatus has a size of 2048 bytes. Therefore, in order for the information recording / reproducing apparatus to process the DV stream, it is necessary to convert the data of 120,000 bytes or 144000 bytes into data of 2048 bytes. Patent Documents 1 and 2 disclose information recording apparatuses that record DV streams.

International Publication No. 03/085972 Pamphlet International Publication No. 03/083868 Pamphlet

  When data in units of 120,000 bytes or 144000 bytes is converted into data in units of 2048 bytes, there are many cases where data relating to a plurality of frames are mixed in the data in units of 2048 bytes. Therefore, when a desired frame is acquired from a series of frame groups, it is necessary to selectively acquire data related to the desired frame from 2048-byte data. In particular, in fast forward playback and rewind playback in which a DV stream is played back while thinning out frames, it is necessary to play back the desired frames obtained while selectively acquiring desired frames that are not thinned out.

  The present invention has been made in view of, for example, the above-described conventional problems. For example, when performing a reproduction operation while processing data in a processing unit different from the processing unit of the data itself, a suitable reproduction operation is realized. It is an object of the present invention to provide an information reproducing apparatus and method, and a computer program that causes a computer to function as such an information reproducing apparatus.

  In order to solve the above-described problem, the information reproducing apparatus according to claim 1 has a first size, a first frame data, a second frame data, and a third frame data each having a first size and continuously arranged. Storage means for storing content data including at least each of the plurality of internal processing data as a plurality of internal processing data each having a second size different from the first size, and (i) the first of the plurality of internal processing data A part of the second frame data included in the first internal processing data including the end portion of the frame data; and (ii) a second including a starting end portion of the third frame data among the plurality of internal processing data. The storage unit is controlled to delete at least one part of the second frame data included in the internal processing data and transfer the content data. And means.

  In order to solve the above-mentioned problem, the information reproducing apparatus according to claim 9 has first frame data, second frame data, and third frame data each having a first size and continuously arranged. Storage means for storing content data including each of a plurality of internal processing data having a second size different from the first size, and (i) the second of the plurality of internal processing data A part of the first frame data included in the first internal processing data including the start end portion of the frame data and (ii) an end portion of the second frame data among the plurality of internal processing data are included. Control means for controlling the storage means to transfer at least one of the third frame data included in the second internal processing data and transfer the content data With steps.

  In order to solve the above-mentioned problem, the information reproducing method according to claim 16, wherein each of the first frame data, the second frame data, and the third frame data has a first size and is continuously arranged. Information reproducing method in an information reproducing apparatus comprising storage means for storing content data including at least each of a plurality of internal processing data each having a second size different from the first size, wherein (i) Of the plurality of internal processing data, a part of the second frame data included in the first internal processing data including a terminal portion of the first frame data; and (ii) the first of the plurality of internal processing data. The case is such that at least one part of the second frame data included in the second internal processing data including the start portion of the three frame data is deleted. A first control step for controlling the delivery means; (i) a part of the second frame data included in the first internal processing data; and (ii) the second frame included in the second internal processing data. A second control step of controlling the storage means so as to transfer the content data from which at least one part of the data has been deleted.

  In order to solve the above-mentioned problem, the information reproducing method according to claim 17, wherein each of the first frame data, the second frame data, and the third frame data has a first size and is continuously arranged. The information reproduction method in the information reproduction apparatus includes storage means for transferring the content data including each of the plurality of pieces of internal data as a plurality of internal processing data each having a second size different from the first size, and (i) Among the plurality of internal processing data, a part of the first frame data included in the first internal processing data including a start end portion of the second frame data, and (ii) the portion of the plurality of internal processing data The storage unit is configured to delete at least one of a part of the third frame data included in the second internal processing data including the end portion of the second frame data. A first control step for controlling a stage, a part of the first frame data included in the first internal processing data, and (ii) the third frame data included in the second internal processing data. A second control step of controlling the storage means so as to transfer the content data from which at least one part has been deleted.

  In order to solve the above-mentioned problem, a computer program according to claim 18 has first frame data, second frame data, and third frame data each having a first size and continuously arranged. Storage means for storing content data including at least each of them as a plurality of internal processing data each having a second size different from the first size; and (i) the first frame of the plurality of internal processing data A part of the second frame data included in the first internal processing data including the end portion of the data, and (ii) a second including the starting end portion of the third frame data among the plurality of internal processing data. The storage means for transferring at least one of the second frame data included in internal processing data and transferring the content data A computer program for controlling reproduction that controls a computer provided in an information reproducing apparatus comprising: control means for controlling the computer, wherein the computer functions as the control means.

  In order to solve the above-described problem, a computer program according to claim 19 includes first frame data, second frame data, and third frame data each having a first size and continuously arranged. Storage means for storing content data including each as a plurality of internal processing data each having a second size different from the first size; and (i) the second frame of the plurality of internal processing data. A part of the first frame data included in the first internal processing data including the start end portion of the data, and (ii) a second end portion of the second frame data included in the plurality of internal processing data. The storage means is controlled to transfer at least one of the third frame data included in the internal processing data of 2 and transfer the content data. A computer program for reproduction control for controlling a computer provided in an information reproduction apparatus comprising control means for controlling, wherein the computer functions as the control means.

  The operation and other advantages of the present invention will become apparent from the embodiments described below.

  Hereinafter, as the best mode for carrying out the invention, description will be given on embodiments of the information reproducing apparatus and method and the computer program of the present invention.

(Embodiment of information reproducing apparatus)
The first embodiment of the information reproducing apparatus of the present invention includes at least each of first frame data, second frame data, and third frame data each having a first size and continuously arranged. Storage means for storing content data as a plurality of internal processing data each having a second size different from the first size; and (i) a terminal portion of the first frame data among the plurality of internal processing data A part of the second frame data included in the first internal processing data including (ii) and (ii) second internal processing data including a start end portion of the third frame data among the plurality of internal processing data. Control means for controlling the storage means so as to transfer at least one of the second frame data included and transfer the content data. .

  According to the first embodiment of the information reproducing apparatus of the present invention, content data input from the outside of the information reproducing apparatus or read from the information recording medium can be stored by the operation of the storage means. Each of the content data has a first size (for example, a frame size to be described later, more specifically, for example, 120,000 bytes, 144000 bytes, etc.), and the first frames arranged continuously. It includes at least data, second frame data, and third frame data. The storage means stores the content data as a plurality of internal processing data each having a second size (for example, a processing unit on a buffer to be described later, more specifically, for example, 2048 bytes). Store. That is, for example, a plurality of internal processing data generated by dividing the content data for each second size is stored.

  At this time, the content data is transferred by deleting a part of the second frame data included in the first internal processing data including the terminal portion of the first frame data among the plurality of internal processing data by the operation of the control means. Thus, the storage means is controlled. Specifically, the first internal processing data includes a start end portion of second frame data arranged subsequent to the first frame data in addition to the end portion of the first frame data. . Therefore, by deleting the second frame data from the first internal processing data, the first frame data can be selectively transferred in the first size. In addition to or instead of this, a part of the second frame data included in the second internal processing data including the starting end portion of the third frame data is deleted from the plurality of internal processing data, and the content data is transferred. Thus, the storage means is controlled. Specifically, the second internal processing data includes the end portion of the second frame data arranged in front of the third frame data in addition to the start portion of the third frame data. . Therefore, by deleting the second frame data from the second internal processing data, the third frame data can be selectively transferred in the first size.

  That is, according to the present embodiment, the first frame data, the second frame data, and the third frame data are included in the first frame from the content data that is processed with the second size as a processing unit. Data and third frame data can be selectively acquired, and content data including the first frame data and the third frame data can be transferred using the first size as a processing unit. In other words, the second frame data is selectively deleted from the content data that includes the first frame data, the second frame data, and the third frame data and is processed with the second size as a processing unit. Then, the content data including the first frame data and the third frame data can be transferred while using the first size as a treatment unit. That is, content data including desired frame data is acquired from a plurality of frame data included in the content data being processed with the second size as a processing unit, and the content data including the desired frame data is obtained. The first size can be transferred as a processing unit. In other words, content data that does not include frame data other than desired frame data is acquired from a plurality of frame data included in the content data that is processed with the second size as a processing unit, and the desired frame data It is possible to transfer content data that does not include any other frame data while using the first size as a processing unit. Then, desired frame data can be selectively reproduced by reproducing the transferred content data.

  In this way, even if some of the plurality of frame data are included in certain internal processing data, the desired frame data is selectively transferred as described above, and as a result, the desired frame data is reproduced. can do. That is, even when the content data is played back while being processed in a processing unit (that is, the second size) that is different from the processing unit (that is, the first size) of the content data itself, According to the information reproducing apparatus according to the first embodiment, a suitable reproducing operation can be realized.

  In particular, since desired frame data can be selectively transferred as described above, special reproduction in which frame data is reproduced while being thinned out can be suitably realized.

  According to one aspect of the first embodiment of the information reproducing apparatus of the present invention, the content data includes one or a plurality of the second frame data, and the control means includes: (i) the first internal processing A part of the second frame data included in the data, (ii) a part of the second frame data included in the second internal processing data, and (iii) the first of the plurality of internal processing data The storage is performed such that each of the one frame data and the third frame data is not included (in other words, only the second frame data is included), the third internal processing data is deleted and the content data is transferred. Control means.

  According to this aspect, the content data can be transferred while selectively thinning out one or a plurality of second frame data arranged between the first frame data and the third frame data. Therefore, even if a part of each of a plurality of frame data is included in certain internal processing data, the desired frame data is selectively transferred as described above, and as a result, the desired frame data is reproduced. Can do.

  According to another aspect of the first embodiment of the information reproducing apparatus of the present invention, the control means includes: (i) a part of the second frame data included in the first internal processing data; (ii) A part of the second frame data included in one second internal processing data, (iii) a part of the first frame data included in the other first internal processing data, and (iv) other The storage unit is controlled to delete at least one part of the third frame data included in the second internal processing data and transfer the content data.

  According to this aspect, the first frame data, the second frame data, and the third frame data are selectively acquired from a plurality of pieces of internal processing data that are processed using the second size as a processing unit, The first frame data, the second frame data, and the third frame data can be transferred while using the first size as a processing unit. That is, for example, even in the case of normal playback without thinning out frame data, the content data is stored in a processing unit (that is, the second size) that is different from the processing unit (that is, the first size) of the content data itself. The content data can be suitably reproduced while being processed. Thereby, the mode of playback can be unified during normal playback and special playback. For this reason, there is no need to separate the reproduction mode, and the reproduction process can be relatively simplified.

  The first internal processing data and the second internal processing data include a part of different frame data, and a part of one of the frame data is deleted. Therefore, in order to transfer a series of frame data, the first internal processing data and the second internal processing data are transferred redundantly in consideration that a part of the frame data is deleted.

  Further, in order to transfer a series of frame data, internal processing data other than the two first internal processing data and the two second internal processing data can be transferred as they are (in other words, without being deleted). preferable.

  According to another aspect of the first embodiment of the information reproducing apparatus of the present invention, the control means is configured to control the first frame data based on a position of the first frame data or the third frame data in the content data. At least one of the part of the second frame data included in the internal processing data and the part of the second frame data included in the second internal processing data is specified.

  According to this aspect, a part of the second frame data included in the first internal processing data (specifically, a position or size at which a part of the second frame data exists) and the second It is relatively easy to specify at least one of a part of the second frame data included in the internal processing data (specifically, a position or a size where a part of the second frame data exists). it can. Thereby, the transfer operation described above can be realized relatively easily.

  In another aspect of the embodiment of the information reproducing apparatus of the present invention, the control means includes at least one of the plurality of pieces of internal processing data having a start end portion among the plurality of frame data included in the content data. Included in the first internal processing data based on the position of the first frame data or the third frame data with reference to the frame data that matches the head portion of the internal processing data At least one of a part of the second frame and a part of the second frame data included in the second internal processing data is specified.

  According to this aspect, the first frame data or the third frame data is a frame in which the start end portion matches the start portion of the internal processing data, with reference to the frame data in which the start end portion matches the start portion of the internal processing data. It is identified how far away from the data (specifically, for example, what number of frame data is present or how many frame data exist between them). In accordance with the identification result, a part of the second frame data included in the first internal processing data (specifically, a position or size at which a part of the second frame data exists) and the second Identifying at least one of a part of the second frame data included in the internal processing data (specifically, a position, a size, etc. where the part of the second frame data exists) relatively easily Can do. In other words, since each frame data has the first size, what kind of aspect the arbitrary frame data has can be obtained by using the frame data whose starting end portion matches the beginning portion of the internal processing data as a reference. It can be relatively easily specified whether the data is divided into internal processing data. Thereby, the transfer operation described above can be realized relatively easily.

  In the aspect of the information reproducing apparatus for specifying at least one of the part of the second frame included in the first internal processing data and the part of the second frame data included in the second internal processing data as described above, The control means indicates a correspondence relationship between a part of the second frame data included in the first internal processing data and a part of the second frame data included in the second internal processing data. Based on each of the correspondence information, at least the other of the part of the second frame included in the first internal processing data and the part of the second frame data included in the second internal processing data is identified. You may comprise.

  If comprised in this way, at least the other of a part of 2nd frame data contained in 1st internal process data and a part of 2nd frame data contained in 2nd internal process data is comparatively easy. Can be specified. Thereby, the transfer operation described above can be realized relatively easily.

  In another aspect of the first embodiment of the information reproducing apparatus of the present invention, the first size is larger than the second size.

  According to this aspect, even if some of the plurality of frame data is included in certain internal processing data, the desired frame data is selectively transferred as described above, and as a result, the desired frame data Can be played. In other words, even when the content data is played back while processing the content data in a processing unit smaller than the processing unit of the content data itself, a suitable playback operation can be realized.

  Another aspect of the embodiment of the information reproducing apparatus of the present invention further includes a reproducing means for reproducing the content data transferred under the control of the control means.

  According to this aspect, even when the content data is reproduced while being processed in a processing unit different from the processing unit of the content data itself, a suitable reproduction operation can be realized.

  The second embodiment according to the information reproducing apparatus of the present invention has contents each having the first size and the first frame data, the second frame data, and the third frame data that are successively arranged. Storage means for storing data as a plurality of internal processing data each having a second size different from the first size, and (i) a start end portion of the second frame data of the plurality of internal processing data A part of the first frame data included in the first internal processing data including, and (ii) a second internal processing including a terminal portion of the second frame data among the plurality of internal processing data And control means for controlling the storage means so as to transfer the content data by deleting at least one of the third frame data included in the data.

  According to the second embodiment of the information reproducing apparatus of the present invention, content data can be transferred in the same manner as the information reproducing apparatus according to the first embodiment described above.

  Particularly in the second embodiment, a part of the first frame data included in the first internal processing data including the starting end portion of the second frame data is deleted from the plurality of internal processing data by the operation of the control means. The storage means is controlled to transfer the content data. Specifically, the first internal processing data includes the end portion of the first frame data arranged in front of the first frame data in addition to the start end portion of the second frame data. . Therefore, by deleting the first frame data from the first internal processing data, the second frame data can be selectively transferred in the first size. In addition to or instead of this, a part of the third frame data included in the second internal processing data including the end portion of the second frame data is deleted from the plurality of internal processing data, and the content data is transferred. Thus, the storage means is controlled. Specifically, the second internal processing data includes a start portion of third frame data arranged subsequent to the second frame data in addition to the end portion of the second frame data. . Therefore, by deleting the third frame data from the second internal processing data, the second frame data can be selectively transferred in the first size.

  That is, according to the present embodiment, the second frame is generated from the content data that includes the first frame data, the second frame data, and the third frame data and is processed with the second size as a processing unit. Data can be selectively acquired, and content data including the second frame data can be transferred using the first size as a processing unit. In other words, from the content data that includes the first frame data, the second frame data, and the third frame data and that is processed using the second size as a processing unit, the first frame data and the third frame are processed. After the data is selectively deleted, the content data including the second frame data can be transferred with the first size as a treatment unit. That is, according to the information reproducing apparatus according to the second embodiment, it is possible to suitably enjoy the same benefits as those of the information reproducing apparatus according to the first embodiment described above.

  In one aspect of the second embodiment of the information reproducing apparatus of the present invention, the control means includes: (i) a part of the first frame data included in the first internal processing data; (ii) Part of the third frame data included in one second internal processing data, (iii) part of the second frame data included in the other first internal processing data, and (iv) other The storage unit is controlled to delete at least one part of the second frame data included in the second internal processing data and transfer the content data.

  According to this aspect, the first frame data, the second frame data, and the third frame data are selectively acquired from a plurality of pieces of internal processing data that are processed using the second size as a processing unit, The first frame data, the second frame data, and the third frame data can be transferred while using the first size as a processing unit. That is, for example, even in the case of normal playback without thinning out frame data, the content data is stored in a processing unit (that is, the second size) that is different from the processing unit (that is, the first size) of the content data itself. The content data can be suitably reproduced while being processed. Thereby, the mode of playback can be unified during normal playback and special playback. For this reason, there is no need to separate the reproduction mode, and the reproduction process can be relatively simplified.

  The first internal processing data and the second internal processing data include a part of different frame data, and a part of one of the frame data is deleted. Therefore, in order to transfer a series of frame data, the first internal processing data and the second internal processing data are transferred redundantly in consideration that a part of the frame data is deleted.

  Further, in order to transfer a series of frame data, internal processing data other than the two first internal processing data and the two second internal processing data can be transferred as they are (in other words, without being deleted). preferable.

  According to another aspect of the second embodiment of the information reproducing apparatus of the present invention, the control means is included in the first internal processing data based on a position of the second frame data in the content data. At least one of a part of the first frame and a part of the third frame data included in the second internal processing data is specified.

  According to this aspect, a part of the first frame data included in the first internal processing data (specifically, a position or size where a part of the third frame data exists) and the second It is relatively easy to specify at least one of a part of the third frame data included in the internal processing data (specifically, a position or a size where a part of the third frame data exists). it can. Thereby, the transfer operation described above can be realized relatively easily.

  According to another aspect of the second embodiment of the information reproducing apparatus of the present invention, the control means is configured such that, of the plurality of frame data included in the content data, the starting end portion is at least one of the plurality of internal processing data. Based on the position of the second frame data on the basis of the frame data matching the head portion of one internal processing data, the first frame of the first internal processing data includes the first frame. At least one of a part and a part of the third frame data included in the second internal processing data is specified.

  According to this aspect, on the basis of the frame data whose starting end portion matches the head portion of the internal processing data, the second frame data is separated from the frame data whose starting end portion matches the head portion of the internal processing data. (Specifically, for example, what number of frame data is present, or how many frame data exist between them). In accordance with the identification result, a part of the first frame data included in the first internal processing data (specifically, a position or size where a part of the first frame data exists) and the second Identifying at least one of a part of the third frame data included in the internal processing data (specifically, a position or size where a part of the third frame data exists) relatively easily Can do. In other words, since each frame data has the first size, what kind of aspect the arbitrary frame data has can be obtained by using the frame data whose starting end portion matches the beginning portion of the internal processing data as a reference. It can be relatively easily specified whether the data is divided into internal processing data. Thereby, the transfer operation described above can be realized relatively easily.

  In an aspect of the information reproducing apparatus for specifying at least one of a part of the first frame included in the first internal processing data and a part of the third frame data included in the second internal processing data, the control unit includes: Corresponding information indicating a correspondence relationship between a part of the first frame data included in the first internal processing data and a part of the third frame data included in the second internal processing data. And at least the other of the part of the first frame included in the first internal processing data and the part of the third frame data included in the second internal processing data. May be.

  If comprised in this way, at least the other of the part of 1st frame data contained in 1st internal process data and the part of 3rd frame data contained in 2nd internal process data is comparatively easy. Can be specified. Thereby, the transfer operation described above can be realized relatively easily.

  In another aspect of the second embodiment of the information reproducing apparatus of the present invention, the first size is larger than the second size.

  According to this aspect, even if some of the plurality of frame data is included in certain internal processing data, the desired frame data is selectively transferred as described above, and as a result, the desired frame data Can be played. In other words, even when the content data is played back while processing the content data in a processing unit smaller than the processing unit of the content data itself, a suitable playback operation can be realized.

  Another aspect of the second embodiment of the information reproducing apparatus of the present invention further includes a reproducing unit that reproduces the content data transferred under the control of the control unit.

  According to this aspect, even when the content data is reproduced while being processed in a processing unit different from the processing unit of the content data itself, a suitable reproduction operation can be realized.

(Embodiment of information reproduction method)
The first embodiment of the information reproducing method of the present invention includes at least each of first frame data, second frame data, and third frame data each having a first size and continuously arranged. An information reproduction method in an information reproduction apparatus comprising storage means for storing content data as a plurality of internal processing data each having a second size different from the first size, wherein (i) the plurality of internal processes A part of the second frame data included in the first internal processing data including the end portion of the first frame data in the data; and (ii) a starting end of the third frame data in the plurality of internal processing data. Controlling the transfer means to delete at least one part of the second frame data included in the second internal processing data including the part. One control step; (i) at least a part of the second frame data included in the first internal processing data; and (ii) a part of the second frame data included in the second internal processing data. A second control step of controlling the storage means so that one of the deleted content data is transferred.

  According to the first embodiment of the information reproducing method of the present invention, it is possible to receive the same benefits as the various advantages of the first embodiment of the information reproducing apparatus of the present invention described above.

  Incidentally, in response to the various aspects in the first embodiment of the information reproducing apparatus of the present invention described above, the first embodiment of the information reproducing method of the present invention can also adopt various aspects.

  The second embodiment according to the information reproducing method of the present invention has contents each having the first size and the first frame data, the second frame data, and the third frame data that are successively arranged. An information reproduction method in an information reproduction apparatus comprising storage means for storing data as a plurality of internal processing data each having a second size different from the first size, wherein (i) the plurality of internal processing data A part of the first frame data included in the first internal processing data including a start end portion of the second frame data, and (ii) the second frame data among the plurality of internal processing data A first control for controlling the storage means to delete at least one of a part of the third frame data included in the second internal processing data including the terminal portion of And at least one of a part of the first frame data included in the first internal processing data and (ii) a part of the third frame data included in the second internal processing data. A second control step of controlling the storage means so as to transfer the deleted content data.

  According to the second embodiment of the information reproducing method of the present invention, it is possible to receive the same benefits as the various advantages of the second embodiment of the information reproducing apparatus of the present invention described above.

  Incidentally, in response to the various aspects in the second embodiment of the information reproducing apparatus of the present invention described above, the second embodiment of the information reproducing method of the present invention can also adopt various aspects.

(Embodiment of computer program)
The first embodiment according to the computer program of the present invention is a computer program for reproduction control for controlling the computer provided in the above-described first embodiment (including various aspects) of the information reproduction apparatus of the present invention. Thus, the computer is caused to function as the control means.

  According to the first embodiment of the computer program of the present invention, if the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and then executed by the computer. Alternatively, if the computer program is downloaded to a computer via communication means and executed, the first embodiment of the information reproducing apparatus of the present invention described above can be realized relatively easily.

  Incidentally, in response to the various aspects in the first embodiment of the information reproducing apparatus of the present invention described above, the first embodiment of the computer program of the present invention can also adopt various aspects.

  The second embodiment according to the computer program of the present invention is a computer program for reproduction control for controlling a computer provided in the above-described second embodiment (including various aspects) of the information reproduction apparatus of the present invention. Thus, the computer is caused to function as the control means.

  According to the second embodiment of the computer program of the present invention, if the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and then executed by the computer. Alternatively, if the computer program is downloaded to a computer via communication means and then executed, the second embodiment according to the information reproducing apparatus of the present invention described above can be realized relatively easily.

  Incidentally, in response to the various aspects of the second embodiment of the information reproducing apparatus of the present invention described above, the second embodiment of the computer program of the present invention can also adopt various aspects.

  Such an operation and other advantages of the present embodiment will be further clarified from examples described below.

  As described above, according to the first embodiment or the second embodiment of the information reproducing apparatus of the present invention, the storage unit and the control unit are provided. According to 1st Embodiment or 2nd Embodiment which concerns on the information reproduction method of this invention, a 1st control process and a 2nd control process are provided. According to the first embodiment or the second embodiment relating to the computer program of the present invention, a computer is caused to function as control means. Therefore, a suitable reproduction operation can be realized when performing a reproduction operation while processing data in a processing unit different from the processing unit of the data itself.

  Embodiments of the present invention will be described below with reference to the drawings.

(1) Basic Configuration First, a basic configuration of an information recording / reproducing apparatus 200 as an embodiment of the information reproducing apparatus of the present invention will be described with reference to FIG. FIG. 1 is a block diagram conceptually showing the basic structure of the information recording / reproducing apparatus 200 in the example. The information recording / reproducing apparatus 200 has a function of recording data on an optical disk or a hard disk and a function of reproducing data recorded on the optical disk or the hard disk.

  As shown in FIG. 1, an information recording / reproducing apparatus 200 includes a disk drive 300 in which an optical disk is actually loaded or a hard disk is actually mounted, and data is recorded or reproduced, and data for the disk drive 300 is recorded. And a recording / reproducing unit 400 for controlling recording and reproduction. The recording / reproducing unit 400 may be a computer such as a personal computer.

  The recording / playback unit 400 includes an IEEE 1394 interface 401, a recording side buffer 402, a DMAC (Direct Memory Access Control) 403, a memory 404, a host processor 405, a DMAC 406, a playback side buffer 407, a control unit 408, And a DV (Digital Video) decoder 409.

  The IEEE 1394 interface 401 is configured to be able to input, for example, a DV stream to the information recording / reproducing apparatus 200 via the input terminal IN. The input DV stream is output to at least one of the recording buffer 402 and the DV decoder 409.

  The recording-side buffer 402 temporarily records a DV stream output from the IEEE 1394 interface 401, and the DV stream is data having a data processing unit in the information recording / reproducing apparatus 200 (specifically, will be described later). 2048 byte unit data). The DV stream converted into data having a data processing unit in the information recording / reproducing apparatus 200 is output to the memory 404.

  The data processing unit in the DV stream and information recording / reproducing apparatus 200 will be described in detail later (see FIGS. 2 and 3).

  The DMAC 403 controls data transfer between the recording buffer 402 and the memory 404. Specifically, the DMAC 403 controls the transfer of the DV stream temporarily recorded in the recording side buffer 402 to the memory 404.

  The memory 404 reads and records the DV stream temporarily recorded in the recording-side buffer 402, transfers the recorded DV stream to the disk drive 300 under the control of the host processor 405, and records the recorded DV stream. The transferred DV stream is transferred to the reproduction side buffer 407 under the control of the DMAC 406.

  The host processor 405 outputs control signals instructing the respective operations to the IEEE 1394 interface 401, the recording buffer 402, the DMAC 403, the memory 404, the DMAC 406, the reproduction buffer 407, the control unit 408, and the DV decoder 409. The overall operation of the recording / reproducing unit 400 is controlled.

  In addition, the host processor 405 transfers the DV stream recorded in the memory 404 to the disk drive 300, and records the DV stream recorded on the optical disk loaded in the disk drive 300 and the hard disk mounted on the disk drive 300. Controls transfer to the playback unit 400. At this time, the host processor 405 controls the recording and reproduction of the DV stream in the disk drive 300 by outputting a control signal instructing recording and reproduction of the DV stream to the disk drive 300.

  The DMAC 406 controls data transfer between the reproduction side buffer 407 and the memory 404. Specifically, the DMAC 406 controls the transfer of the DV stream recorded in the memory 404 to the reproduction side buffer 407.

  The reproduction-side buffer 407 constitutes a specific example of the “storage unit” in the present invention, and temporarily records the DV stream output from the memory 404 and processes the DV stream itself with the DV stream itself. The data is converted into data having a unit (specifically, data of 120,000 bytes or 144000 bytes described later). The DV stream converted into data having the processing unit of the DV stream itself is output to the DV decoder 409.

  The control unit 408 constitutes a specific example of “control means” in the present invention, and controls conversion of processing units of DV streams in the recording side buffer 402 and the reproduction side buffer 407.

  In particular, the control unit 408 deletes some data (in other words, selectively obtains some data) when converting the processing unit of the DV stream in the reproduction side buffer 407. 407 is controlled. This operation will be described in detail later (see FIGS. 4 to 6).

  The DV decoder 409 constitutes a specific example of the “reproducing means” in the present invention, and performs a decoding process on the DV stream output from the IEEE 1394 interface 401 or the reproduction side buffer 407. The DV stream subjected to the decoding process is output to an external output device such as various displays or various speakers. Thereby, a DV stream can be reproduced.

(2) Operation Principle (2-1) Data Processing Unit Next, a DV stream handled by the information recording / reproducing apparatus 200 according to the present embodiment will be described with reference to FIG. FIG. 2 is a data structure diagram conceptually showing the processing unit of the DV stream.

  As shown in FIG. 2, the DV stream is composed of a plurality of frame data # 1, # 2,..., #N (n> 1) each having a predetermined size. For example, when the DV stream conforms to the NTSC system, the size of each frame data is 120,000 bytes. For example, when the DV stream conforms to the PAL system, the size of each frame data is 144000 bytes. These sizes correspond to a specific example of “first size” in the present invention. Each of the plurality of frame data #n corresponds to each of the frames # 1, # 2,.

  Next, a data processing unit in the information recording / reproducing apparatus 200 will be described with reference to FIG. FIG. 3 is a data structure diagram conceptually showing a data processing unit in the information recording / reproducing apparatus 200.

  As shown in FIG. 3, in the information recording / reproducing apparatus 200, data is processed in units of 2048 bytes (for example, input / output processing, recording processing, reading processing, etc.). Specifically, in the recording-side buffer 402, a DV stream composed of frame data in units of 120,000 bytes or 144000 bytes is converted into data in units of 2048 bytes (hereinafter, data in units of 2048 bytes is referred to as “internal processing”). And is recorded in units of 2048 bytes (specifically, as internal processing data # 1, # 2,...). Further, the DV stream is recorded in units of 2048 bytes from the recording buffer 402 to the memory 404, from the memory 404 to the host processor 405, from the host processor 405 to the disk drive 300, and from the disk drive 300 to the host processor 405, to the host processor. The data is output from 405 to the memory 404 and from the memory 404 to the reproduction side buffer 407. Further, in the reproduction side buffer 407, the data of 2048 bytes is converted into frame data of 120,000 bytes or 144000 units, and output to the DV decoder 409 every 120,000 bytes or 144000 units. The size of 2048 bytes corresponds to a specific example of “second size” in the present invention.

(2-2) Special Playback Operation Next, with reference to FIG. 4 to FIG. 7, an operation at the time of special playback (for example, fast forward playback or rewind playback) of a DV stream by the information recording / reproducing apparatus 200 according to the present embodiment. The principle will be explained. 4 is a data structure diagram showing a plurality of frame data constituting the DV stream in association with units of internal processing data. FIG. 5 shows a frame of internal processing data at the time of special playback of the DV stream. FIG. 6 is a data structure diagram conceptually showing a conversion process to data, and FIG. 6 shows an offset used for specifying a top offset when converting internal process data to frame data during special playback of a DV stream. FIG. 7 conceptually shows an offset table used for specifying a bottom offset when converting internal processing data into frame data during special playback of a DV stream. It is a table.

  As shown in FIG. 4, during special playback, frame data # 1, # 2, # 3 and # 4 are processed by internal processing data # 1, # 2,... By the operation of the DMAC 406 controlled by the host processor 405. , #W (where 1 is an integer greater than or equal to 1), # w + 1,..., # X-1 (where x is an integer greater than or equal to w), #x, # x + 1,. , Y is an integer greater than or equal to x), #y, # y + 1,..., # Z−1 (where z is an integer greater than or equal to y), #z, is read from the memory 404 and output to the playback side buffer 407 Is done. In the reproduction side buffer 407, the frame data # 1, # 2, # 3 and # 4 are stored in the internal processing data # 1, # 2,..., #W (where w> 1), # w + 1,. ···, # x-1, #x, # x + 1, ..., # y-1, #y, # y + 1, ..., # z-1, #z are temporarily recorded.

  When generating the frame data # 1 from the internal processing data temporarily recorded in the reproduction side buffer 407 (in other words, converting the internal processing data into the frame data # 1), the internal processing data # 1, # 2, ... and #w are required. At this time, the internal processing data #w includes unnecessary data 101-2 (# 1) which is not necessary for generating the frame data # 1. This unnecessary data 101-2 (# 1) corresponds to a part of the frame data # 2. Therefore, when generating the frame data # 1 from the internal processing data temporarily recorded in the reproduction side buffer 407, unnecessary data 101-2 included in the internal processing data #w is generated by the operation of the control unit 408. After (# 1) is deleted, the internal processing data # 1, # 2,..., And #w are combined to be converted into a series of frame data. Thereby, frame data # 1 of 120,000 bytes (or 144000 bytes) can be generated from the internal processing data of 2048 bytes.

  Similarly, when the frame data # 2 is generated from the internal processing data temporarily recorded in the reproduction side buffer 407 (in other words, when the internal processing data is converted into the frame data # 2), the internal processing data # w, # w + 1,..., # x−1 and #x are required. At this time, the internal processing data #w includes unnecessary data 101-1 (# 2) which is not necessary for generating the frame data # 2. This unnecessary data 101-1 (# 2) corresponds to a part of the frame data # 1. The internal processing data #x includes unnecessary data 101-2 (# 2) that is not necessary for generating the frame data # 2. This unnecessary data 101-2 (# 2) corresponds to a part of the frame data # 3. Therefore, when generating the frame data # 2 from the internal processing data temporarily recorded in the reproduction side buffer 407, the unnecessary data 101-1 included in the internal processing data #w is generated by the operation of the control unit 408. After deleting unnecessary data 101-2 (# 2) included in (# 2) and internal processing data #x, internal processing data #w, # w + 1,..., # X-1 and #x are combined. To convert to a series of frame data. Thereby, frame data # 2 of 120,000 bytes (or 144000 bytes) can be generated from the internal processing data of 2048 bytes.

  Similarly, when generating the frame data # 3 from the internal processing data temporarily recorded in the reproduction side buffer 407 (in other words, converting the internal processing data into the frame data # 3), the internal processing data # x, # x + 1,..., # y−1 and #y are required. At this time, the internal processing data #x includes unnecessary data 101-1 (# 3) that is not necessary for generating the frame data # 3. This unnecessary data 101-1 (# 3) corresponds to a part of the frame data # 2. The internal processing data #y includes unnecessary data 101-2 (# 3) that is not necessary for generating the frame data # 3. This unnecessary data 101-2 (# 3) corresponds to a part of the frame data # 4. For this reason, when generating the frame data # 3 from the internal processing data temporarily recorded in the reproduction-side buffer 407, the unnecessary data 101-1 included in the internal processing data #x is generated by the operation of the control unit 408. After deleting unnecessary data 101-2 (# 3) included in (# 3) and internal processing data #y, internal processing data #x, # x + 1,..., # Y-1 and #y are combined. To convert to a series of frame data. Thereby, frame data # 3 of 120,000 bytes (or 144000 bytes) can be generated from the internal processing data of 2048 bytes.

  Similarly, when generating the frame data # 4 from the internal processing data temporarily recorded in the reproduction side buffer 407 (in other words, converting the internal processing data into the frame data # 4), the internal processing data # y, # y + 1,..., # z−1 and #z are required. At this time, the internal processing data #y includes unnecessary data 101-1 (# 4) which is not necessary for generating the frame data # 4. This unnecessary data 101-1 (# 4) corresponds to a part of the frame data # 3. The internal processing data #z includes unnecessary data 101-2 (# 4) that is not necessary for generating the frame data # 4. The unnecessary data 101-2 (# 4) corresponds to a part of the frame data # 5 arranged next to the frame data # 4. For this reason, when generating the frame data # 4 from the internal processing data temporarily recorded in the reproduction-side buffer 407, the unnecessary data 101-1 included in the internal processing data #y is generated by the operation of the control unit 408. After deleting unnecessary data 101-2 (# 4) included in (# 4) and internal processing data #z, internal processing data #y, # y + 1,..., # Z-1 and #z are combined. To convert to a series of frame data. Thereby, frame data # 4 of 120,000 bytes (or 144000 bytes) can be generated from the internal processing data of 2048 bytes.

  Here, special playback in which frame data # 1 and # 3 are selectively played back by thinning out frame data # 2 and # 4 from frame data # 1, # 2, # 3, and # 4 will be described.

  As shown in FIG. 5, (i) internal processing data # 1, # 2,... Necessary for generating frame data # 1 from the memory 404 by the operation of the DMAC 406 controlled by the host processor 405. And #w, and (ii) internal processing data #x, # x + 1,..., # Y−1 and #y necessary for generating frame data # 3 are output to the reproduction side buffer 407. The

  In the reproduction side buffer 407, after the unnecessary data 101-2 (# 1) included in the internal processing data #w is deleted by the operation of the control unit 408, the internal processing data # 1, # 2,. #W is combined. As a result, the internal processing data # 1, # 2,..., And #w in units of 2048 bytes are converted into frame data # 1 in units of 120,000 bytes (or in units of 144000 bytes). Similarly, after the unnecessary data 101-1 (# 3) included in the internal processing data #x and the unnecessary data 101-2 (# 3) included in the internal processing data #y are deleted by the operation of the control unit 408, , Internal processing data #x, # x + 1,..., # Y−1 and #y are combined. As a result, the internal processing data #x, # x + 1,..., # Y−1 and #y in 2048 bytes are converted to frame data # 3 in 120,000 bytes (or 144000 bytes).

  Thereafter, a DV stream including each of the frame data # 1 and # 3 is output to the DV decoder 409. The DV decoder 409 performs a decoding process on the DV stream including the frame data # 1 and # 3. As a result, special reproduction is realized in which frame data # 1 and # 3 are selectively reproduced by thinning out frame data # 2 and # 4 from frame data # 1, # 2, # 3 and # 4.

  Here, it is preferable to use the offset tables shown in FIGS. 6 and 7 for specifying the unnecessary data 101-1 and 101-2. Here, the size of the unnecessary data 101-1 (#n) located before a certain frame data #n (where n is an integer equal to or greater than 1) is referred to as a top offset, and is arranged following a certain frame data #n. The size of the unnecessary data 101-2 (#n) is referred to as a bottom offset. That is, the top offset corresponds to the data size from the start end portion of the internal processing data including the start end portion of certain frame data to the start end portion of certain frame data. Similarly, the bottom offset corresponds to the data size from the end portion of certain frame data to the end portion of internal processing data including the end portion of certain frame data.

  As shown in FIG. 6A, the top offset is uniquely determined depending on the position of the target frame data from the top frame data. For example, when the target frame data is the 0th frame data from the top frame data (that is, the target frame data itself is the top frame data), the top offset is, for example, “a0”. . For example, when the target frame data is the first frame data from the top frame data (that is, the target frame data is arranged next to the top frame data), the top offset is, for example, “a1 " For example, when the target frame data is the second frame data from the top frame data, the top offset is, for example, “a2”. For example, when the target frame data is Nth frame data (where N is an integer of 1 or more) from the top frame data, the top offset is, for example, “aN”.

  As shown in FIG. 6B, the top offset is assumed to be uniquely and periodically determined depending on the position of the target frame data from the top frame data. For example, when the target frame data is the 0th, X (where X is an integer equal to or greater than 1) th and Y (where Y is an integer greater than or equal to 1) frame data from the top frame data, The top offset is “b0”, for example. For example, when the target frame data is the first, X + 1th, and Y + 1th frame data from the top frame data, the top offset is “b1”, for example. For example, when the target frame data is the second, X + 2, and Y + 2th frame data from the top frame data, the top offset is “b2”, for example. For example, when the target frame data is Mth (X is an integer equal to or greater than 1), X + Mth, and Y + Mth frame data from the top frame data, the top offset is, for example, “bM”. .

  Here, the head frame data means frame data whose head part matches the head part of the internal processing data. That is, the frame data converted into 2048-byte units so that the head portion becomes the head portion of the internal processing data becomes the head frame data.

  Specifically, the top frame data in FIG. 4 is frame data # 1. Frame data # 1 corresponds to the 0th frame data from the top frame data. Frame data # 2 corresponds to the first frame data from the top frame data. Frame data # 3 corresponds to the second frame data from the top frame data. Frame data # 4 corresponds to the third frame data from the top frame data. Then, the top offsets of the frame data # 1, # 2, # 3, and # 4 are calculated using the tables shown in FIGS. 6 (a) and 6 (b).

  Furthermore, as shown in FIG. 7, the bottom offset is uniquely determined from the top offset. This is clear from the fact that the size of the frame data is fixed. For example, if the top offset is “c0”, the bottom offset is “d0”. For example, if the top offset is “c1”, the bottom offset is “d1”. For example, if the top offset is “c2”, the bottom offset is “d2”. For example, if the top offset is “cL (where L is an integer of 1 or more)”, the bottom offset is “dL”.

  A specific example of the relationship between the top offset and the bottom offset is as follows, for example. The top offset value at the boundary (in other words, the nth boundary) of the frame data positioned at the mth (where m is an integer equal to or greater than 0) when the boundary of the start edge of the top frame data is 0th The value of P (m) and the bottom offset is defined as Q (m). That is, it is assumed that unnecessary data having a size of P (m) and unnecessary data having a size of Q (m) are adjacent to each other at the boundary of the nth frame data. When the DV stream conforms to the NTSC system, P (m) = 2048−Q (m) and Q (m) = 2048 × (58 + k) + Q (m−1) −120,000. Note that k is 0 or 1 depending on the value of m. Further, when the remainder (residue) when m is divided by 32 is 0, Q (m) = 0, and when the remainder (residue) when m is divided by 32 is not 0, Q (m ) Is determined from the above formula. In this case, P (m) has the same value every 32 periods. On the other hand, when the DV stream conforms to the PAL system, P (m) = 2048−Q (m) and Q (m) = 2048 × (70 + 1) + Q (m−1) -144000. Note that l is 0 or 1 depending on the value of m. Further, when the remainder (residue) when m is divided by 16 is 0, Q (m) = 0, and when the remainder (residue) when m is divided by 16 is not 0, it is determined from the above formula. In this case, P (m) has the same value every 16 periods.

  In this way, by referring to the offset tables shown in FIGS. 6 and 7, unnecessary data 101-1 arranged following the start portion of the frame data and unnecessary data 101-2 arranged following the end portion of the frame data. Each can be identified. The identification of the unnecessary data 101-1 and 101-2 is performed by the operation of the control unit 408.

  As described above, according to the information recording / reproducing apparatus 200 of this embodiment, the internal processing data in 2048 bytes can be converted into frame data in 120,000 bytes or 144000 bytes. In particular, since unnecessary data 101-1 and 101-2 are deleted as described above, desired frame data in units of 120,000 bytes or 144000 bytes can be extracted from internal processing data in units of 2048 bytes. As a result, even when frame data in units of 120,000 bytes or 144000 bytes is handled as internal processing data in units of 2048 bytes, special reproduction that continuously reproduces desired frame data can be suitably performed.

  In addition, the unnecessary data 101-1 and 101-2 can be specified relatively easily by referring to the offset table. In other words, by referring to the offset table, the unnecessary data 101-1 and 101-2 can be identified relatively easily without performing complicated calculation processing.

  Needless to say, the above-described benefits can be obtained by performing the above-described operation when selectively reproducing arbitrary frame data from a plurality of frame data. In other words, regardless of the number of frame data to be selectively reproduced, it is possible to receive the above-described benefits by performing the above-described operation when selectively reproducing desired frame data. Not too long.

  In the above-described offset table, the top offset is first specified according to the position of the target frame data from the top frame data, and then the bottom offset is specified from the top offset. However, similarly to the top offset, the bottom offset is also uniquely determined by the position of the target frame data from the top frame data. Therefore, the bottom offset may be specified first and the top offset may be specified from the bottom offset after that, depending on the position of the target frame data from the top frame data. Alternatively, the top offset and the bottom offset may be specified by performing predetermined arithmetic processing from the relationship between the internal processing data and the frame data without referring to the offset table.

(2-3) Normal Playback Operation Subsequently, with reference to FIGS. 8 and 9, normal playback (for example, standard in which fast-forward playback or rewind playback is not performed) of the DV stream by the information recording / reproducing apparatus 200 according to the present embodiment. The operation principle at the time of reproduction) will be described. FIG. 8 is a data structure diagram conceptually showing a first mode of conversion processing of internal processing data into frame data at the time of normal reproduction of the DV stream, and FIG. 9 is at the time of normal reproduction of the DV stream. FIG. 5 is a data structure diagram conceptually showing a second aspect of the conversion process of internal process data into frame data in FIG.

  As shown in FIG. 8, a case where frame data # 1, # 2, # 3 and # 4 are normally reproduced will be described. In this case, the operation of the DMAC 406 controlled by the host processor 405 causes the internal processing data # 1, # 2,..., #W, # w + 1,. # X + 1,..., # Y−1, #y, # y + 1,..., # Z−1 and #z are output to the reproduction side buffer 407. Here, during normal playback, the playback-side buffer 407 reads internal processing data from an arbitrary position in the playback-side buffer 407, thereby converting 2048-byte internal processing data into 120,000-byte or 144000-byte frames. Convert to data. That is, during normal playback, as in the above-described special playback, internal processing data is read sequentially without considering unnecessary data 101-1 and 101-2, and the read internal processing data is converted into frame data. Then, the frame data may be transferred to the DV decoder.

  Specifically, for example, the internal processing data is sequentially read from the position where the start end portion of the internal processing data # 1 is recorded in the reproduction side buffer 407. After that, if the internal processing data is read sequentially, the internal processing data # 1, # 2,..., #W, # w + 1,..., # X-1, #x, # x + 1,. # Y-1, #y, # y + 1,..., # Z-1 and #z can be read out. Then, the frame data # 1 can be generated when the internal processing data # 1, # 2,..., # W-1 and #w are read. Subsequently, frame data # 2 can be generated when the internal processing data # w + 1,..., # X−1 and #x are read. Subsequently, the frame data # 3 can be generated when the internal processing data # x + 1,..., # Y−1 and #y are read. Subsequently, frame data # 4 can be generated when the internal processing data # y + 1,..., # Z−1 and #z are read.

  However, the frame data # 4 which is the last frame data includes unnecessary data 101-2 (# 4) following the end portion thereof. Therefore, it is necessary to delete this unnecessary data 101-2 (# 4) in the same manner as in the special reproduction operation described above.

  On the other hand, even during normal reproduction, the same operation as that during special reproduction described above may be performed.

  Specifically, as shown in FIG. 9, by the operation of the DMAC 406 under the control of the host processor 405, (i) internal processing data # 1, # 2 necessary for generating frame data # 1 from the memory 404 ,..., And #w, (ii) Internal processing data #w, # w + 1,..., # X−1 and #x necessary for generating frame data # 2, (ii) frame data # , # Y-1 and #y necessary for generating 3 and (iv) internal processing data #y necessary for generating frame data # 4, Each of # y + 1,..., # Z−1 and #z is output to the reproduction side buffer 407.

  In the reproduction side buffer 407, after the unnecessary data 101-2 (# 1) included in the internal processing data #w is deleted by the operation of the control unit 408, the internal processing data # 1, # 2,. #W is combined. As a result, the internal processing data # 1, # 2,..., And #w in units of 2048 bytes are converted into frame data # 1 in units of 120,000 bytes (or in units of 144000 bytes).

  Similarly, after the unnecessary data 101-1 (# 2) included in the internal processing data #w and the unnecessary data 101-2 (# 2) included in the internal processing data #x are deleted by the operation of the control unit 408, , Internal processing data #w, # w + 1,..., # X−1 and #x are combined. As a result, the internal processing data #w, # w + 1,..., # X−1 and #x in units of 2048 bytes are converted into frame data # 2 in units of 120,000 bytes (or in units of 144000 bytes).

  Similarly, after the unnecessary data 101-1 (# 3) included in the internal processing data #x and the unnecessary data 101-2 (# 3) included in the internal processing data #y are deleted by the operation of the control unit 408, , Internal processing data #x, # x + 1,..., # Y−1 and #y are combined. As a result, the internal processing data #x, # x + 1,..., # Y−1 and #y in 2048 bytes are converted to frame data # 3 in 120,000 bytes (or 144000 bytes).

  Similarly, after the unnecessary data 101-1 (# 4) included in the internal processing data #y and the unnecessary data 101-2 (# 4) included in the internal processing data #z are deleted by the operation of the control unit 408, , Internal processing data #y, # y + 1,..., # Z−1 and #z are combined. As a result, the internal processing data #y, # y + 1,..., # Z−1 and #z in 2048 bytes are converted to frame data # 4 in 120,000 bytes (or 144000 bytes).

  Thereafter, a DV stream including each of the frame data # 1, # 2, # 3, and # 4 is output to the DV decoder 409. The DV decoder 409 performs a decoding process on the DV stream including the frame data # 1, # 2, # 3, and # 4. Thereby, normal reproduction for reproducing the frame data # 1, # 2, # 3, and # 4 is realized.

  Thus, by making the operation during normal playback the same as the operation during special playback, it is not necessary to switch the operation of the control unit 408 between normal playback and special playback. Therefore, the operation load in the information recording / reproducing apparatus 200 can be relatively reduced. In addition, since the reproduction side buffer 407 can use a common core (area) during normal reproduction and special reproduction, the circuit configuration of the reproduction side buffer 407 can be relatively simplified. Or the circuit scale of the reproduction-side buffer 407 can be made relatively small.

(2-4) Reproduction Operation when Editing Operation is Performed Next, with reference to FIG. 10, normal reproduction operation of the information recording / reproducing apparatus 200 according to the present embodiment when the DV stream editing operation is performed. (That is, playback at standard speed without fast-forwarding or rewinding) will be described. FIG. 10 is a data structure diagram conceptually showing conversion processing of internal processing data into frame data when a DV stream editing operation is performed.

  Note that the editing operation assumes that the user deletes frame data, for example, with respect to the DV stream recorded on the optical disk loaded on the disk drive 300 or the hard disk mounted on the disk drive 300. Yes. Thereafter, in accordance with the content of the editing operation performed by the user, the internal processing data is output from the memory 404 to the reproduction side buffer 407 and converted into frame data. Thereafter, the frame data is output to the DV decoder 409, so that the frame data is reproduced as an edited DV stream.

  Here, the reproduction operation when the user performs an editing operation for deleting # n-1 from frame data # 2 among frame data # 1, # 2,..., And #n will be described.

  10, (i) internal processing data # 1, # 2,... Necessary for generating frame data # 1 from the memory 404 by the operation of the DMAC 406 controlled by the host processor 405. And #w, and (ii) internal processing data #y, # y + 1,..., # Z−1 and #z necessary for generating frame data #n are output to the reproduction side buffer 407. The

  In the reproduction side buffer 407, after the unnecessary data 101-2 (# 1) included in the internal processing data #w is deleted by the operation of the control unit 408, the internal processing data # 1, # 2,. #W is combined. As a result, the internal processing data # 1, # 2,..., And #w in units of 2048 bytes are converted into frame data # 1 in units of 120,000 bytes (or in units of 144000 bytes). Similarly, after the unnecessary data 101-1 (#n) included in the internal processing data #y and the unnecessary data 101-2 (#n) included in the internal processing data #z are deleted by the operation of the control unit 408, , Internal processing data #y, # y + 1,..., # Z−1 and #z are combined. As a result, the internal processing data #y, # y + 1,..., # Z−1 and #z in 2048 bytes are converted into frame data #n in 120,000 bytes (or 144000 bytes).

  Thereafter, a DV stream including each of the frame data # 1 and #n is output to the DV decoder 409. The DV decoder 409 performs a decoding process on the DV stream including the frame data # 1 and #n. As a result, it is possible to reproduce a DV stream that has been edited to delete # n−1 from frame data # 2 among frame data # 1, # 2,..., And #n.

  As described above, even in the normal reproduction operation when the editing operation is performed on the DV stream, the above-described various benefits can be obtained by performing the same operation as that in the special reproduction operation.

  In the above embodiment, details of the recording operation of the DV stream on the optical disk or hard disk are not described. However, if the recording side buffer 402 converts the frame data constituting the DV stream into 2048-byte internal processing data and sequentially transfers the internal processing data to the memory 404, the DV stream to the optical disk or hard disk A recording operation can be realized.

  In the above-described embodiment, the configuration for recording and reproducing the DV stream has been described. Needless to say, the above-described various benefits can be enjoyed by performing the above-described operation for the reproducing configuration.

  In the above-described embodiments, the hard disk and the optical disk are described as examples of the information recording medium, and the recording / reproducing apparatus according to the hard disk and the optical disk is described as an example of the information reproducing apparatus. However, the present invention is not limited to this, and can be applied to other various information recording media corresponding to high-density recording or high transfer rates and recording / reproducing apparatuses thereof.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and information reproduction accompanied by such changes is possible. Apparatuses and methods, and computer programs are also included in the technical scope of the present invention.

1 is a block diagram conceptually showing the basic structure of an information recording / reproducing apparatus in an example. It is a data structure figure which shows notionally the processing unit of DV stream. It is a data structure figure which shows notionally the processing unit of the data in the information recording / reproducing apparatus based on a present Example. FIG. 3 is a data structure diagram showing a plurality of frame data constituting a DV stream in association with units of internal processing data. It is a data structure figure which shows notionally the conversion process to the frame data of the internal process data at the time of special reproduction | regeneration of a DV stream. It is a table | surface which shows notionally the offset table used in order to specify a top offset in the conversion process to the frame data of the internal process data at the time of special reproduction | regeneration of DV stream. It is a table | surface which shows notionally the offset table used in order to specify a bottom offset in the conversion process to the frame data of the internal process data at the time of special reproduction | regeneration of DV stream. It is a data structure figure which shows notionally the 1st aspect of the conversion process to the frame data of the internal process data at the time of normal reproduction | regeneration of a DV stream. It is a data structure figure which shows notionally the 2nd aspect of the conversion process to the frame data of the internal process data at the time of normal reproduction | regeneration of a DV stream. It is a data structure figure which shows notionally the conversion process to the frame data of internal process data when the edit operation of DV stream is performed.

Explanation of symbols

101-1, 101-2 unnecessary data 200 information recording / reproducing apparatus 300 disk drive 400 recording / reproducing unit 402 recording side buffer 404 memory 405 host processor 407 reproduction side buffer 408 control unit 409 DV decoder

Claims (19)

Content data including at least each of the first frame data, the second frame data, and the third frame data, each having a first size and continuously arranged, is different from the first size. Storage means for storing as a plurality of internal processing data each having a size of
(i) a part of the second frame data included in the first internal processing data including a terminal portion of the first frame data among the plurality of internal processing data; and (ii) a plurality of the internal processing data Controlling the storage means to transfer at least one of the second frame data included in the second internal processing data including the start end portion of the third frame data and transferring the content data And an information reproducing apparatus. The content data includes one or a plurality of the second frame data,
The control means includes (i) a part of the second frame data included in the first internal processing data, (ii) a part of the second frame data included in the second internal processing data, and (iii) The storage so as to transfer the content data by deleting the third internal processing data not including each of the first frame data and the third frame data among the plurality of internal processing data 2. The information reproducing apparatus according to claim 1, wherein the information is controlled.   The control means includes (i) a part of the second frame data included in the first internal processing data, and (ii) the second frame data included in the second internal processing data. (Iii) a part of the first frame data included in the other first internal processing data, and (iv) a part of the third frame data included in the other second internal processing data. The information reproducing apparatus according to claim 1, wherein the storage unit is controlled to transfer at least one part of the content data.   The control means, based on the position of the first frame data or the third frame data in the content data, a part of the second frame data included in the first internal processing data and the The information reproducing apparatus according to claim 1, wherein at least one of a part of the second frame data included in the second internal processing data is specified.   The control means is based on the frame data whose starting end portion matches the head portion of at least one of the plurality of internal processing data among the plurality of frame data included in the content data. Based on the position of the first frame data or the third frame data, a part of the second frame and the second internal processing data included in the first internal processing data The information reproducing apparatus according to claim 1, wherein at least one of a part of the second frame data included in the information is specified.   The control means indicates a correspondence relationship between a part of the second frame data included in the first internal processing data and a part of the second frame data included in the second internal processing data. Based on each of the correspondence information, at least the other of the part of the second frame included in the first internal processing data and the part of the second frame data included in the second internal processing data is identified. The information reproducing apparatus according to claim 4, wherein:   The information reproducing apparatus according to claim 1, wherein the first size is larger than the second size.   2. The information reproducing apparatus according to claim 1, further comprising reproducing means for reproducing the content data transferred under the control of the control means. Content data including each of the first frame data, the second frame data, and the third frame data, each having a first size and continuously arranged, is different from the first size. Storage means for storing as a plurality of internal processing data each having a size;
(i) a part of the first frame data included in the first internal processing data including a start end portion of the second frame data among the plurality of internal processing data; and (ii) the plurality of internal processes. The storage is performed such that at least one part of the third frame data included in the second internal processing data including the end portion of the second frame data is deleted from the data, and the content data is transferred. An information reproducing apparatus comprising: control means for controlling the means.   The control means includes (i) a part of the first frame data included in the first internal processing data, and (ii) the third frame data included in the second internal processing data. Part of (iii) part of the second frame data included in the other first internal processing data, and (iv) part of the second frame data included in the other second internal processing data. The information reproducing apparatus according to claim 9, wherein the storage unit is controlled to transfer at least one part of the content data.   The control means includes a part of the first frame included in the first internal processing data and the second internal processing data based on the position of the second frame data in the content data. The information reproducing apparatus according to claim 9, wherein at least one of a part of the third frame data is specified.   The control means is based on the frame data whose starting end portion matches the head portion of at least one of the plurality of internal processing data among the plurality of frame data included in the content data. Based on the position of the second frame data, a part of the first frame included in the first internal processing data and the third frame included in the second internal processing data The information reproducing apparatus according to claim 9, wherein at least one part of the data is specified.   The control means is a correspondence indicating a correspondence relationship between a part of the first frame data included in the first internal processing data and a part of the third frame data included in the second internal processing data. Based on each of the information, a part of the first frame included in the first internal processing data and a part of the third frame data included in the second internal processing data are identified. The information reproducing apparatus according to claim 11, wherein:   The information reproducing apparatus according to claim 9, wherein the first size is larger than the second size.   10. The information reproducing apparatus according to claim 9, further comprising a reproducing unit that reproduces the content data transferred under the control of the control unit. Content data including at least each of the first frame data, the second frame data, and the third frame data, each having the first size and continuously arranged, is different from the first size. An information reproduction method in an information reproduction apparatus comprising storage means for storing as a plurality of internal processing data each having a size of
(i) a part of the second frame data included in the first internal processing data including a terminal portion of the first frame data among the plurality of internal processing data; and (ii) a plurality of the internal processing data A first control step of controlling the storage means so as to delete at least one part of the second frame data included in the second internal processing data including the start end portion of the third frame data,
At least one of (i) a part of the second frame data included in the first internal processing data and (ii) a part of the second frame data included in the second internal processing data is deleted. And a second control step of controlling the storage means so as to transfer the content data. Content data including each of the first frame data, the second frame data, and the third frame data, each having a first size and continuously arranged, is different from the first size. An information reproduction method in an information reproduction apparatus comprising storage means for storing as a plurality of internal processing data each having a size,
(i) a part of the first frame data included in the first internal processing data including a start end portion of the second frame data among the plurality of internal processing data; and (ii) the plurality of internal processes. A first control for controlling the storage means to delete at least one of a part of the third frame data included in the second internal processing data including a terminal portion of the second frame data in the data; Process,
The part of the first frame data included in the first internal processing data and (ii) the part of the third frame data included in the second internal processing data is deleted. And a second control step of controlling the storage means so as to transfer content data.   Content data including at least each of the first frame data, the second frame data, and the third frame data, each having the first size and continuously arranged, is different from the first size. And (i) the first internal processing data included in the first internal processing data including a terminal portion of the first frame data among the plurality of internal processing data. At least one of a part of two frame data and (ii) a part of the second frame data included in second internal processing data including a start end portion of the third frame data among the plurality of internal processing data A computer provided in an information reproducing apparatus comprising control means for controlling the storage means so as to transfer the content data by deleting A computer program for playback control, which causes the computer to function as the control means.   The content data including each of the first frame data, the second frame data, and the third frame data, each having a first size and continuously arranged, is different from the first size. Storage means for storing as a plurality of internal processing data each having a size; and (i) the first internal processing data included in the first internal processing data including a start end portion of the second frame data among the plurality of internal processing data. A part of the first frame data and (ii) a part of the third frame data included in the second internal processing data including the end portion of the second frame data among the plurality of internal processing data Controlling a computer provided in an information reproducing apparatus comprising control means for controlling the storage means so as to transfer at least one of the content data A computer program for reproduction control, which causes the computer to function as the control means.

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