JP2010027145A - Recording apparatus, recording method, reproducing apparatus, and reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent decrease in speed of writing data to a hard disk drive and reading data from a hard disk. <P>SOLUTION: Before a video signal is written in the hard disk drive 1f, a size of a dummy file per unit is determined, a plurality of dummy files with arbitrary names including a serial number given are stored in the hard disk drive 1f in the determined size, dummy data is written in each dummy file, the video signal is written in the determined dummy file, regarding the dummy file where the video signal is written, only part other than the serial number out of the name given to the dummy file is changed to change the name of the dummy file, and, when the size of the written data is less than the size of the determined dummy file, predetermined dummy data is written after the video signal as terminal data until the size of the data becomes equal to the size of the dummy file. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus, a recording method, a reproducing apparatus, and a reproducing method capable of writing a video signal to a storage medium.

2. Description of the Related Art Conventionally, there is known a recording / reproducing apparatus capable of recording arbitrary information and dividing the recorded information into divided files so that an unnecessary part felt unnecessary by an operator can be partially deleted (patent) Reference 1).
JP 2002-140886 A

  However, in the invention of Patent Document 1, since the file is divided, the file is fragmented, and there is a possibility that the data writing speed to the hard disk drive and the data reading speed from the hard disk are reduced.

  According to the inventor's consideration regarding video signal recording processing and playback processing, data is written to the hard disk drive by managing the file so that the file is not fragmented when the video signal is recorded. In addition, there is an increasing demand from the industry for a recording apparatus that can prevent a decrease in the speed of accessing a hard disk and reading data from the hardware.

Accordingly, the present invention provides a recording that can prevent a decrease in the speed of data writing to the hard disk drive and data reading from the hard disk by recording the video signal without causing file fragmentation. An object is to provide an apparatus and a recording method.
Furthermore, another object of the present invention is to provide a reproducing apparatus and a reproducing method for reproducing video data recorded by such a recording apparatus.

  In order to solve the above problems, a recording apparatus according to the present invention provides a dummy file per unit that is stored in a storage area of a storage unit before the video signal is written to the storage unit having a storage area in which the video signal is stored. File size determining means for determining the size of the file, and dummy file writing for storing a plurality of dummy files to which an arbitrary name including at least a serial number is assigned in the storage area of the storage means at a size determined by the file size determining means Means, a first dummy data writing means for writing dummy data in each dummy file, a dummy file determining means for determining a dummy file for writing a video signal, and a dummy file whose video signal is determined by the dummy file determining means Video signal writing means and video signal writing File name changing means for changing the name of the dummy file by changing only the part other than the serial number among the names given to the dummy file, and the video signal When the video signal data size written by the writing means is less than the dummy file size determined by the file size determining means, the data size is equal to the dummy file size determined by the file size determining means. And second dummy data writing means for writing predetermined dummy data as termination data after the video signal.

  In order to solve the above-described problem, a recording method according to the present invention provides a dummy file per unit to be stored in a storage area of a storage unit before the video signal is written to the storage unit having a storage area in which the video signal is stored. File size determining step for determining the size of the file, and a dummy file writing step for storing a plurality of dummy files to which an arbitrary name including at least a serial number is assigned in the storage area of the storage means with the size determined in the file size determining step A first dummy data writing step for writing dummy data in each dummy file, a dummy file determination step for determining a dummy file to which a video signal is written, and a video signal for the dummy file determined in the dummy file determination step. Video signal writing process and video signal writing process For the dummy file to which the audio signal is written, in the file name changing step for changing the name of the dummy file by changing only the part other than the serial number among the names given to the dummy file, and the video signal writing step When the size of the data of the written video signal is less than the size of the dummy file determined in the file size determination step, until the data size becomes equal to the size of the dummy file determined in the file size determination step And a second dummy data writing step of writing predetermined dummy data as termination data after the video signal.

  In order to solve the above-described problem, a playback apparatus according to the present invention stores a first storage unit storing a video signal including a plurality of frames, and a video signal read from the first storage unit. A second storage means composed of a plurality of unit buffers formed in a ring shape, and when reproducing a video signal, the video signal is read from the first storage means for each of a plurality of frames, and the read video The video data writing means for writing the signal to the second storage means for each of a plurality of frames and the number of frames included in the video signal stored in the second storage means when reproducing the video signal in time series When the number of frames exceeds a predetermined number, the process of reading the video signal from the first storage means is performed, and the number of frames included in the video signal stored in the second storage means Read stop means for stopping until the number of frames is less than the predetermined number of frames, read restart means for restarting the process of reading the video signal stopped by the read stop means from the first storage means, and storage in the second storage means And a reproducing means for reproducing the recorded video signal in the forward direction or the reverse direction.

In order to solve the above-described problems, in the reproduction method according to the present invention, when reproducing a video signal, the video signal is read out from the first storage means storing the video signal including a plurality of frames for each of the plurality of frames. Video data read from the first storage means for each of a plurality of frames is stored and the video data is written to the second storage means composed of a plurality of unit buffers formed in a ring shape If the number of frames included in the video signal stored in the second storage means is greater than or equal to a predetermined number of frames in the writing process and when reproducing the video signal in time series, the video signal Is read out from the first storage means until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames. A stop narrowing seen step, characterized in that it comprises a resuming reading resuming step a process of reading the video signal is stopped from the first storage means by reading stop process.
Further, in order to solve the above-described problem, the playback method according to the present invention is a reading order in which frames are read out from the first storage means in which a video signal including a plurality of frames is stored when the video signal is played back in the reverse direction. However, the video signal is read for each of the plurality of frames so that the frame numbers assigned to the respective frames are in ascending order, the read video signal is stored as the video signal read from the first storage means, and A video data writing step for writing a plurality of frames to a second storage unit configured by a plurality of unit buffers formed in a ring shape, and a second storage unit that stores a video signal when reproducing the video signal in the reverse direction When the number of frames included in the received video signal exceeds a predetermined number of frames, a process of reading the video signal from the first storage means is performed. A reading stop process for stopping until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames, and the video signal stopped by the reading stop process is read from the first storage means. The reading restarting step for restarting the process and the reading order for reading the frames from the second storage means are sequentially read for each of a plurality of frames so that the frame numbers assigned to the respective frames are in descending order. And a reverse reproduction step of executing a reproduction process.

  According to the present invention, it is possible to prevent the writing of data to the hard disk drive and the decrease in the reading speed of the data from the hard disk by recording the video signal without causing the fragmentation of the file. .

Hereinafter, the best mode of the present invention will be described with reference to the drawings.
(First embodiment)

  FIG. 1 is a block diagram showing an overall configuration of a recording / reproducing apparatus 1 to which a recording apparatus according to an embodiment of the present invention is applied.

  The recording / reproducing apparatus according to the present embodiment prevents the fragmentation of the storage area storing the video signal and stores the video signal as a video signal from the viewpoint of speeding up the processing during reproduction or recording. Before writing to the storage means having the storage area, the size of the dummy file per unit to be stored in the storage area of the storage means is determined, and a plurality of dummy files to which arbitrary names including at least a serial number are assigned are determined. Process to determine the dummy file to which the video signal is written in the dummy file stored in the storage area, with the dummy data being written, and to write the video signal to the determined dummy file. Is a device for executing

  The recording / reproducing apparatus 1 according to the present embodiment includes a video input unit 1a, an operation input receiving unit 1b, a stream encoder 1c, a system controller 1d, a file system 1e, a hard disk 1f, a synchronization processing unit 1g, A stream decoder 1h and a video output unit 1i are provided.

  Under the control of the system controller 1d, the video input unit 1a receives an input video signal such as MPEG2 TS input from the outside, and outputs the received video signal to the stream encoder.

  The operation input receiving unit 1b receives an initialization request for initializing a hard disk drive file input by an operator's operation, a video signal recording request for recording a video signal on the hard disk drive, and the name of a file to be played back And a video signal reproduction request for reproducing the video signal recorded on the hard disk drive, and a combination of the name of the file to be erased and the video signal erasure request for erasing the video signal recorded on the hard disk drive. Is output to the system controller 1d.

  The stream encoder 1c performs codec processing on the video signal input from the video input unit 1a under the control of the system controller 1d, compresses the video signal, and writes the obtained digital video data to the hard disk.

  The system controller 1d determines the size of a dummy file to be stored in the storage area of the hard disk 1f before writing the video signal to the hard disk 1f having a storage area in which the video signal is stored, and includes at least an arbitrary serial number. A plurality of dummy files with names assigned are stored in the storage area with the determined size, and dummy files to which video signals are written are determined with dummy data written in each dummy file stored in the storage area. Then, the entire recording / reproducing apparatus 1 is controlled so as to execute the process of controlling the file system 1f so as to execute the process of writing the video signal to the determined dummy file, the format process, the data writing process, and the data reproducing process. The process to perform is performed.

  Under the control of the system controller 1d, the file system 1e determines the size of a dummy file to be stored in the storage area of the hard disk 1f before writing video data to the hard disk drive 1f, and includes at least an arbitrary number including a serial number. A plurality of dummy files to which names are assigned are stored in a storage area in a determined size, a format process for writing dummy data in each dummy file stored in the storage area, and writing of video data to the hard disk drive 1f The processing and the video data reading processing from the hard disk drive 1f are executed.

  The hard disk drive 1f is a storage medium in which digital video data obtained by compressing a video signal is stored so as to be writable / readable.

  The synchronization processing unit 1g extracts a horizontal synchronization signal, a vertical synchronization signal, and a clock signal included in the video signal input to the video signal input unit 1a under the control of the system controller 1d, and extracts the extracted horizontal synchronization signal and vertical synchronization. The signal and the synchronization signal are output to the video output unit 1i.

  The stream decoder 1h decompresses the digital video data read from the hard disk drive 1f, and outputs the obtained video signal to the video output unit 1i.

  The video output unit 1i receives the video signal output from the stream decoder 1h, and records and reproduces the video signal received from the stream decoder 1h using the horizontal synchronization signal and the vertical synchronization signal output from the synchronization processing unit 1g. 1 The same waveform as the signal waveform of the video signal input to the main body is output.

Next, processing executed by the recording / reproducing apparatus 1 configured as described above will be described with reference to the drawings. 2 to 9 are diagrams for explaining processing executed by the recording / reproducing apparatus 1 according to the present embodiment. In the following description, the description is limited to the point of the present invention, and from the viewpoint of improving the efficiency of the description, out of all the processes executed by the recording / reproducing apparatus 1 according to the present embodiment, here, the file system described above is used. In addition, only the format processing, data writing processing, data reproduction processing, and data erasing processing that constitute the file management processing for managing the file that is the processing executed by the system controller for the hard disk drive described above will be described. And
[Format processing]

  First, of the format processing, data writing processing, data reproducing processing, and data erasing processing constituting the file management processing executed by the recording / reproducing apparatus 1 according to this embodiment, the processing for preparing to write data is performed. The relevant format processing will be described.

  First, when an initialization request for initializing a file in the hard disk drive 1f is input from the operation input receiving unit 1b by an operation of the operator, the file system 1e receives all the data in the storage area of the hard disk drive 1f. By erasing the file, initialization processing of the hard disk drive 1f is executed (A1).

  In the next step A2, the file system 1e sets the size of the dummy file per unit to be stored in the storage area of the hard disk drive 1f before writing the video signal to the hard disk drive 1f having the storage area in which the video signal is stored. decide.

  As the size of the dummy file per unit that the file system 1e of the recording / reproducing apparatus 1 according to the present embodiment stores in the storage area of the hard disk drive 1f, the maximum size of the file size unique to the file system 1e, For example, it is needless to say that the size may be 2 GB or smaller.

  In the next step A3, the file system 1e generates a dummy file of the determined uniform size in the storage area of the hard disk drive 1f, and stores the generated dummy file.

  In the next step A4, the file system 1e gives each dummy file an arbitrary name including at least a serial number.

  In the recording / reproducing apparatus 1 according to the present embodiment, the name given to each dummy file by the file system 1e is any name as long as it can be specified that digital video data is not recorded. There may be.

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e assigns each dummy file with a name that does not record digital video data as shown in FIG. “Empty” that allows the system to identify the file to be used and a specific name including a serial number, “empty_e1”, “empty_e2”, “empty_e3”,..., “Empty_e13”, “empty_14”, “ “empty_15”,..., “empty_eN”, etc.

  In the recording / playback apparatus 1 according to the present embodiment, as shown in FIG. 7, the file system 1e has a name assigned to each dummy file as shown in FIG. It goes without saying that a name may be given that is a combination of “empty” that allows the system to specify that the data is not recorded, in other words, an unused file, and a specific name including a random number. Yes.

  In the next step A5, the file system 1e writes dummy data in each dummy file.

  In the recording / reproducing apparatus 1 according to the present embodiment, as the dummy data that the file system 1e writes to each dummy file, for example, an all 0 data string, an all 1 data string, or a data string of a specific pattern, for example, Needless to say, the data string may be an arbitrary combination of 0 and 1 such as “01010101...”.

  Further, in the recording / reproducing apparatus 1 according to the present embodiment, the operating system that manages the file system 1e is an operating system that can execute the processing of area allocation and file name management without writing dummy data. Of course, it is only necessary to generate a plurality of dummy files having a determined substantially constant size, and it is not necessary to write dummy data to each of the generated dummy files.

Through the above series of processes, the recording / reproducing apparatus 1 according to the present embodiment ends the formatting process.
[Data writing process]

  Next, a data writing process constituting a file management process executed by the recording / reproducing apparatus 1 according to the present embodiment will be described.

  First, in step B1, the file system 1e writes a video signal when a video signal recording request for recording a video signal is input to the hard disk drive 1f by an operation of the operator from the operation input receiving unit 1b. Determine a dummy file.

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has a case where other video signals are stored in the first dummy file and the second dummy file as shown in FIG. The third dummy file “Empty_e3” is selected.

  In the recording / reproducing apparatus 1 according to the present embodiment, as shown in FIG. 6, the file system 1e has a number included in the name among the names assigned to the dummy files when the video signal is recorded. The dummy file to which the video signal is written is determined so that the distribution of the dummy file in which the video signal is written by combining the dummy file including the number 1 and the second number larger than the first number is substantially uniform. Needless to say.

  This makes it possible to make the recording speed uniform between the inner periphery and the outer periphery of the hard disk drive.

  Further, in the recording / reproducing apparatus 1 according to the present embodiment, as shown in FIG. 7, the file system 1e does not record digital video data as the name assigned to each dummy file by the file system 1e. In other words, when a name that is a combination of “empty” that allows the system to identify an unused file and a specific name including a random number is given, the video signal data is written. When selecting the dummy file, a dummy file for writing video signal data may be selected so that the number of the selected dummy file is in ascending order or descending order.

  As a result, in the recording / reproducing apparatus 1 according to the present embodiment, the locations in the storage area in the hard disk drive 1f are changed to the inner circumference by using randomly assigned dummy files in ascending order or descending order. The outer circumference and the outer circumference are used at random, and the performance difference between the recording speeds of the inner circumference and the outer circumference of the hard disk drive can be made uniform to improve the performance.

  Furthermore, in the recording / reproducing apparatus 1 according to the present embodiment, as shown in FIG. 8, when the file system 1e selects a dummy file for writing a video signal, the number of the selected dummy file is made random. Alternatively, a dummy file for writing a video signal may be selected.

  As a result, the recording / reproducing apparatus 1 according to the present embodiment uses the dummy files to which the serial numbers are assigned in a random order, so that the location in the storage area in the hard disk drive 1f is divided between the inner circumference and the outer circumference. It is used at random, and the performance difference in recording speed between the inner and outer circumferences of the hard disk drive 1f is made uniform, and the performance can be improved.

  In the recording / reproducing apparatus 1 according to the present embodiment, when the file system 1e selects a dummy file for writing a video signal, the number of the dummy file to be selected is set to the maximum number that is the total number of dummy files, For example, “N−1”, “N-2”, “N-3”... “3”, “2”, “1” are set so as to decrement in order from the dummy file to which “N” is assigned. A dummy file for writing a video signal may be selected. In this case, the file system 1e initially manages the maximum number, which is the total number of dummy files. However, along with the data writing, the number to be managed is “N−1” in order from the dummy file to which “N” is assigned. “N-2”, “N-3”... “3”, “2”, “1” are decremented.

  In the next step B2, the file system 1e opens the dummy file determined as the dummy file into which the video signal is written so that the video signal can be written into the dummy file.

  In the next step B3, the file system 1e uses the dummy data previously written in the dummy file until the amount of data is the same as the amount of dummy data previously written in the dummy file in which the video signal can be written. Is overwritten with the video signal data to write the video signal data in the dummy file.

  In the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has the data amount of the video signal that reaches the amount that can be written to the dummy file that can be written to be opened. If not, after the video signal data is written in the opened dummy file in the hard disk drive 1f, the dummy data is written until it matches the size of the dummy file determined in advance.

  In the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has the data amount of the video signal that reaches the amount that can be written to the dummy file that can be written to be opened. If not, after the video signal data was written in the opened dummy file in the hard disk drive 1f, the dummy data was written until it matched the size of the dummy file determined in advance. In the file system 1e according to the present embodiment, as shown in FIG. 4, the data amount of the video signal does not reach the amount that can be written to the dummy file that can be opened and the video signal can be written. In this case, the video signal data is stored in the opened dummy file in the hard disk drive 1f. After the data is written into the file, predetermined end data indicating that there is no more video signal data in the dummy file, for example, “ffffffff”, is written until the size matches the predetermined dummy file size. It goes without saying that the data writing process may be terminated without writing dummy data.

  Thereby, as shown in FIG. 5, the file system 1e according to the present embodiment has the data amount of the video signal in an amount that can be written to the dummy file that can be opened and the video signal can be written. If not, the video signal data is written in the opened dummy file in the hard disk drive 1f without writing the dummy data until it matches the predetermined dummy file size. In this case, predetermined termination data indicating that there is no more video signal data, for example, “ffffffff” is written and the data writing process is terminated, so that the processing time can be shortened.

  In the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has the data amount of the video signal that reaches the amount that can be written to the dummy file that can be written to be opened. If not, the dummy data was written until it matched the predetermined dummy file size after the video signal data was written to the open dummy file in the hard disk drive. As shown in FIG. 9, in the file system 1e according to the embodiment, the data amount of the video signal does not reach the amount that can be written to the dummy file that can be opened and the video signal can be written. In this case, the video signal data is stored in the opened dummy file in the hard disk drive 1f. The top at a predetermined position of the terminal end or the like, a predetermined number of bytes area, it is needless to say that may write the number of bytes of video data written to the dummy file.

  In the next step B4, the file system 1e closes the dummy file in which the video signal data is written until the amount of data is the same as the amount of dummy data written in advance.

  In the next step B5, the file system 1e changes the name of the dummy file by changing only the part other than the serial number of the names assigned to the dummy file with respect to the dummy file to which the video signal is written. .

  For example, in the example shown in FIG. 3 described above, the file system 1e relates to the dummy video “Empty_e3” in which the video signal is written, and only the part other than the serial number of the name assigned to the dummy file is digital video. The name of the dummy file is changed to “scene1_e3” by changing to a specific name “scene1” that can specify that the data has been recorded.

  In step B6, the file system 1e determines whether or not the input of all data of the video signal, which is data to be written to the hard disk drive 1f, has been received.

  When the file system 1e determines that the input of all the data of the video signal, which is the data to be written to the hard disk drive 1f, has been received as a result of the determination in the above-described step B6, The video signal data writing process ends.

  On the other hand, if the file system 1e determines that the input of all the data of the video signal, which is the data to be written to the hard disk drive 1f, is not completed as a result of the determination in the above-described step B6, The process proceeds to step B1 to execute a process of determining a dummy file to which a video signal is to be written. Thereafter, until reception of input of all data of the video signal which is data to be written to the hard disk drive 1f is completed. The execution process in the process B1 to the process B5 described above is repeated.

Through the series of processes described above, the recording / reproducing apparatus 1 according to the present embodiment ends the data writing process.
[Data playback processing]

  Next, the data reproduction process that constitutes the file management process executed by the recording / reproducing apparatus 1 according to the present embodiment will be described.

  First, in step C1, the file system 1e receives the name of the file to be played and a video signal playback request for playing back the video signal recorded on the hard disk drive by the operator's operation from the operation input receiving unit 1b. When input, the name of the file to be reproduced designated by the operation of the operator from the operation input receiving unit 1b is searched on the hard disk drive 1f.

  As a result of the above-described search, the file system 1e performs operation input when the name of the file to be reproduced specified by the operation of the operator from the operation input receiving unit 1b exists on the hard disk drive 1f (C1: Yes). The name of the file to be reproduced first in time is detected from the reception target file designated by the operation of the operator from the accepting unit 1b (C2).

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e includes the file name “scene1_xx” at the beginning of the name “scene” of the reproduction target file designated by the operation of the operator from the operation input receiving unit 1b. As shown in FIG. 3, the file name “scene1_e3” is obtained on the hard disk drive.

  On the other hand, when the file system 1e does not exist on the hard disk drive as a result of the search described above and the name of the file to be played designated by the operator's operation from the operation input receiving unit 1b (C1: No), After notifying the operator that the name of the file to be played designated by the operator's operation does not exist on the hard disk drive from the input receiving unit 1b (C3), the data playing process that is being executed is terminated. .

  In step C4, the file system 1e opens the file to be reproduced first in the time of the reproduction target file designated by the detected operator's operation, so that the stored data can be read. To do.

  In step C5, the file system 1e opens and reads the stored video data from the file in which the stored data can be read, and outputs the read data to the stream decoder 1h.

  Thus, the video data stored in the file to be reproduced first in time of the reproduction target file designated by the operation of the operator from the operation input receiving unit is reproduced by the stream decoder 1h.

  In step C6, the file system 1e closes the file from which the video data has been read.

  In step C7, the file system 1e determines whether the name of the file to be reproduced next to the reproduction target file designated by the operation of the operator exists on the hard disk drive 1f in terms of time.

  When the file system 1e determines that the name of the file to be reproduced next exists on the hard disk drive 1f as a result of the above-described process (C7: Yes), the file system 1e proceeds to the above-described process C2 and performs the above-described process. The execution process in C2 to C6 is repeated.

  In the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e determines that the file to be reproduced last in the reproduction target file designated by the operation of the operator is up to immediately before the dummy data. After the video signal is read, the read video signal data is output to the stream encoder 1h.

  Therefore, in the recording / reproducing apparatus 1 according to the present embodiment, when the file to be reproduced is the last file to be reproduced, which is designated by the operation of the operator, the file is stored in the dummy file by the stream coder 1h. The video signal up to immediately before the dummy data is reproduced.

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e includes the file name “scene1_e3 at the beginning of the name“ scene ”of the reproduction target file designated by the operation of the operator from the operation input receiving unit 1b. ”To determine whether the name of the file to be reproduced next exists on the hard disk drive, detect“ scene2_e4 ”, open the detected“ scene2_e4 ”, and store the video signal stored in“ scene2_e4 ” The data of the read video signal is output to the stream decoder 1h.

  Thereby, in the recording / reproducing apparatus 1 according to the present embodiment, the data of the video signal stored in “scene2_e4” is reproduced.

  Next, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has the file name “scene2_e4” of the name “scene” of the reproduction target file designated by the operation of the operator from the operation input receiving unit 1b. Next, it is determined whether the name of the file to be reproduced exists on the hard disk drive 1f, "scene3_e5" is detected, the detected "scene3_e5" is opened, and the video signal stored in "scene3_e5" Read the data and output the read video signal data to the stream decoder.

  Thereby, in the recording / reproducing apparatus 1 according to the present embodiment, the data of the video signal stored in “scene3_e5” is reproduced.

  Next, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has the file name “scene3_e5” of the name “scene” of the reproduction target file designated by the operation of the operator from the operation input receiving unit 1b. Next, it is determined whether the name of the file to be reproduced exists on the hard disk drive 1f, “scene4_e6” is detected, the detected “scene4_e6” is opened, and the dummy data stored in “scene4_e6” is detected. The previous video signal data is read, and the read video signal data is output to the stream decoder 1h.

  Thereby, in the recording / reproducing apparatus 1 according to the present embodiment, the video signal data stored before the dummy data stored in “scene4_e6” is reproduced.

  On the other hand, if the file system 1e determines that the name of the file to be reproduced next does not exist on the hard disk drive 1f as a result of the above-described process (C7: No), the execution process is ended as it is.

  Through the series of processes described above, the recording / reproducing apparatus 1 according to the present embodiment ends the data reproducing process.

  As shown in FIG. 5, the file system 1e according to the present embodiment can write in a dummy file that can be opened to write a video signal when data is written, as in the last data. If the video signal data amount does not reach the possible amount, after writing the video signal data to the opened dummy file in the hard disk drive 1f, there is no more video signal data in the dummy file. When predetermined end data indicating not to be performed, for example, “ffffffff” is written, the data before the end data is read, and the read data is output to the streaming decoder 1h.

  Thereby, in the recording / reproducing apparatus 1 which concerns on this Embodiment, the video data until before the said termination | terminus data are reproduced | regenerated.

  In the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e has an amount of video that can be written to a dummy file that can be opened and a video signal can be written, as shown in FIG. If the data amount of the signal has not reached, the video signal data is placed in a predetermined number of bytes area at a predetermined position such as the beginning and end of the opened dummy file in the hard disk drive 1f. If the number of bytes of video data written in the dummy file is written, after reading the number of written bytes, the video data of the number of read bytes may be output to the stream decoder. Good.

As a result, in the recording / reproducing apparatus 1 according to the present embodiment, video data for the number of written bytes is reproduced for the dummy file.
[Erase Data]

  Next, a data erasure process constituting a file management process executed by the recording / reproducing apparatus 1 according to the present embodiment will be described.

  First, in step D1, the file system 1e receives a name of a file to be reproduced and a video signal erasure request for erasing a video signal recorded in the hard disk drive 1f by an operation of the operator from the operation input receiving unit 1b. Is input, the name of the file to be erased designated by the operation of the operator from the operation input receiving unit 1b is searched on the hard disk drive 1f.

  As a result of the search described above, the file system 1e operates when the name of the file to be erased designated by the operator's operation from the operation input receiving unit 1b exists on the hard disk drive 1f (D1: Yes). The name of the file to be erased designated by the operator's operation is detected from the receiving unit 1b (D2).

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, the file system 1e searches for the file name “scenex_xx” of the name “scene” of the file to be erased designated by the operation of the operator from the operation input receiving unit 1b. Then, as shown in FIG. 4, the file names “scene1_e3”, “scene2_e4”, “scene3_e5”, and “scene4_e6” are obtained on the hard disk drive 1f.

  On the other hand, if the file system 1e does not exist on the hard disk drive 1f as a result of the above-described search and the name of the file to be erased designated by the operator's operation from the operation input receiving unit 1b (D1: No), After notifying the operator that the name of the file to be erased specified by the operation of the operator from the operation input receiving unit 1b does not exist on the hard disk drive 1f (D3), a data erasing process that is being executed is performed. finish.

  In step D4, the file system 1e uses the file name changed when the data of the video signal is written while the data stored in the detected file to be erased is stored in the file to be erased. Change the name to the same name of the dummy file before the change.

  For example, in the recording / reproducing apparatus 1 according to the present embodiment, as shown in FIG. 4, the file system 1e includes the detected deletion target files “scene1_e3”, “scene2_e4”, “scene3_e5”, and “scene4_e6”. The stored data remains stored in each of the files “scene1_e3”, “scene2_e4”, “scene3_e5”, and “scene4_e6” to be erased, and the file name “scene1_e3” changed when the video signal data is written. , “Scene2_e4”, “scene3_e5”, and “scene4_e6” are renamed to the same names as the dummy file names “empty_e3”, “empty_e4”, “empty_e5”, and “empty_e6” before the change.

  In the recording / reproducing apparatus 1 according to the present embodiment, when the file system 1e selects the dummy file for writing the video signal, the number of the dummy file to be selected is the maximum number that is the total number of dummy files, For example, “N−1”, “N-2”, “N-3”... “3”, “2”, “1” are set so as to decrement in order from the dummy file to which “N” is assigned. When a dummy file to which a video signal is written is selected and recorded, in other words, the number managed by the file system 1e is managed from the maximum number, which is the total number of dummy files, together with data writing. Are sequentially decremented as “N−1”, “N-2”, “N-3”... “3”, “2”, “1”, and stored in the detected deletion target file. The data in the state of being stored in the erased file is changed to a name that contains a number obtained by adding 1 to the number contained in the file name has been changed when writing data of a video signal.

  As a result, when recording a video signal, a dummy file is selected and used in order from a dummy file with a larger number included in the dummy file name to a dummy file with a smaller number when the video file is recorded. Instead of changing to the name of the dummy file before the change, it is managed with the number next to the maximum number managed in the hard disk, so it is easy without duplication of the number included in the name assigned to the dummy file Number management becomes possible.

  By using the dummy file numbers while managing the dummy file numbers in this way, the current total number of dummy files can be easily managed, and in addition to multiplying that value by the size of the dummy file, which is a fixed value, The number of used recording bytes can be easily calculated, and management of unused recording bytes can be executed.

  Through the series of processes described above, the recording / reproducing apparatus 1 according to the present embodiment ends the data erasure process.

  As described above, according to the present embodiment, after the initialization of the file system 1e of the hard disk drive 1f, all the storage areas of the hard disk drive are recorded with the dummy file size according to the arbitrarily defined dummy file size. Even when the recording and erasing of the video file is repeated, it is only overwritten to the file written in the entire storage area of the hard disk drive first, so that the fragmentation of the file can be prevented.

  Further, according to the present embodiment, after the initialization of the file system 1e of the hard disk drive, all the storage areas of the hard disk drive 1f are recorded with the dummy file size according to the arbitrarily defined dummy file size. Since the LBAs of the files secured as are continuous in ascending order, the LBA continuity is maintained even if the video data is overwritten in the dummy file.

  As a result, according to the present embodiment, in the recording / reproduction of video data in the dummy file, the LBA is continuously read / written in ascending order, and the read / write performance of the hard disk drive 1f can be improved.

  Also, according to the present embodiment, the larger the dummy file number, the larger the LBA, and the LBAs are arranged in order from the outer periphery to the inner periphery of the HDD in the order of the dummy file number. By properly using the dummy file number according to the bit rate of the signal, it becomes possible to properly use the difference in speed between the inner and outer circumferences of the hard disk drive.

  Furthermore, according to the present embodiment, it becomes possible to roughly control the writing positions on the inner and outer circumferences in the hard disk drive 1f.

  Further, according to the present embodiment, in the case of a high bit rate of the video signal to be recorded, the file is recorded in a file having a small dummy file number, and in the case of the low bit rate of the video signal to be recorded, By recording in a file with a large number, it is possible to properly use the difference in performance depending on the recording speed on the inner and outer circumferences of the hard disk drive 1f.

  Furthermore, according to the present embodiment, the file can be erased simply by changing the file name without changing anything while the data in the file is stored.

Also, according to the present embodiment, video data is erased by adopting a file name that includes both a file division number and a dummy file number as a video recording file name. In this case, the file can be easily returned to the original dummy file name, and special management such as dummy file number management becomes unnecessary, and the system can be configured simply.
(Second Embodiment)

  FIG. 10 is a block diagram showing an overall configuration of a recording / reproducing apparatus 1 ′ to which the reproducing apparatus according to one embodiment of the present invention is applied. The same parts as those in the above-described drawings are denoted by the same reference numerals, and detailed description thereof is omitted. Here, different parts will be mainly described.

  The recording / reproducing apparatus 1 ′ according to the present embodiment manages a video signal in units of frames and records it in the recording apparatus. From the viewpoint of increasing the speed of forward reproduction and reverse reproduction processing during reproduction, The apparatus is equipped with a buffer 1j composed of a plurality of unit buffers formed in the above, and operates the buffer as described below, thereby enabling high-speed forward playback and reverse playback processing. .

  The recording / reproducing apparatus 1 ′ according to the present embodiment is configured such that the selection operation input unit 1b of the configuration of the recording / reproducing apparatus 1 according to the first embodiment is used as the selection operation input unit 1b ′, and the selection operation input unit 1b is selected. In the input unit 1b ', the system controller 1d is replaced with the system controller 1d', the file system 1e is replaced with the file system 1e ', and the video data is temporarily stored when the hard disk drive 1f is read / written. The buffer 1j to be added is added.

  The selection operation input unit 1b ′ receives an initialization request for initializing a hard disk drive file input by an operator's operation, a video signal recording request for recording a video signal on the hard disk drive, and a file to be played back. Pair of name and video signal playback request to play back the video signal recorded on the hard disk drive, video signal playback to play back the name of the file to be played back and the video signal recorded on the hard disk drive The set of the request and the set of the name of the file to be erased and the video signal erasure request for erasing the video signal recorded on the hard disk drive are output to the system controller 1d ′.

  In addition to the processing executed by the system controller 1d according to the first embodiment, the system controller 1d ′ has the number of frames for forward reproduction written in the buffer 1j equal to or greater than the predetermined number of frames. When the number of frames for measurement and management and the number of frames for forward playback written in the buffer 1j exceeds a predetermined number of frames, the frame data is transferred from the hard disk drive 1f to the file system 1e '. Is read and stored in the buffer 1j, and when the number of frames for forward playback written in the buffer 1j is equal to or greater than a predetermined number of frames, stored in the buffer Read out the frame data and output it to the stream decoder 1h. When a process, a file name to be played back from the selection operation input unit 1b ', and a reverse playback request for playing back the file in the reverse direction are received, the data reading position is moved counterclockwise by one frame. The frame 1 stored in the buffer is read, the process of transferring the read frame data to the stream decoder 1h is executed by the buffer 1j, and the data write position for writing the frame data is counterclockwise. Moves by one frame, reads from the hard disk drive 1f the frame data obtained by subtracting the number of installed buffers from the last frame read from the hard disk 1f and stored in the buffer 1j in forward playback. Processing for storing data relating to the received frame in the buffer 1j Preparative and a process to be executed parallel processing to perform the processing to be executed by the file system 1c' respectively every frame.

  In the file system 1e ′, in addition to the processing executed by the file system 1e according to the first embodiment, the number of frames for forward reproduction written in the buffer 1j is greater than or equal to a predetermined number of frames. The frame data is read from the hard disk drive 1f and stored in the buffer 1j, the file name to be reproduced from the selection operation input unit 1b ', and the reverse reproduction request for reproducing the file in the reverse direction. Is received, the data writing position for writing the frame data is moved counterclockwise by one frame, and from the last frame read out from the hard disk 1f and stored in the buffer 1j in the forward reproduction. The frame data obtained by subtracting the number of installed buffers from the hard disk drive 1f A process of reading and storing data relating to the read frame in the buffer 1j is executed.

  The buffer 1j is a buffer composed of a plurality of unit buffers formed in a ring shape, and the number of frames for forward reproduction written in the buffer 1j is equal to or more than a predetermined number of frames. In addition, the frame data stored in the buffer is read and output to the stream decoder 1h, the file name to be reproduced from the selection operation input unit 1b ', and the reverse reproduction request for reproducing the file in the reverse direction. Is received, the data reading position is moved counterclockwise by one frame, the frame data stored in the buffer is read, and the read frame data is transferred to the stream decoder 1h. To do.

  Since the other configuration of the recording / reproducing apparatus 1 ′ according to the present embodiment is the same as that of the recording / reproducing apparatus 1 according to the first embodiment described above, detailed description thereof is omitted here. .

  Next, execution processing executed by the recording / reproducing apparatus 1 ′ configured as described above will be described with reference to the drawings.

  In the following description, the description will be focused on the point of the present invention, and from the viewpoint of improving the efficiency of the description, out of all the processing executed by the recording / reproducing apparatus 1 ′ according to the present embodiment, here, in a ring shape Only the playback process using the configured buffer 1j will be described.

  First, the file system 1e ′ receives the name of the file to be reproduced and the forward reproduction request for forward reproduction of the video signal recorded in the hard disk drive 1f by the operation of the operator from the operation input receiving unit 1b. Is input from the operation input accepting unit 1f, the first frame F1 of the file having the name to be reproduced designated by the operation of the operator is read from the hard disk drive 1f, and the read file having the name to be reproduced is read. The first frame F1 is written to the first buffer N1 of the buffer 1j configured in a ring shape.

  In the next step, the file system 1e ′ reads from the hard disk drive 1f the frame F2 to be reproduced next to the file with the name to be reproduced designated by the operation of the operator from the operation input receiving unit 1b, and the read reproduction. The frame F2 to be reproduced next to the target name file is written in the buffer N2 next to the buffer 1j configured in a ring shape.

  In the next step, the file system 1e 'reads from the hard disk drive 1f the frame F3 to be reproduced next to the file having the name to be reproduced designated by the operation of the operator from the operation input receiving unit 1b, and the read reproduction. The frame F3 to be reproduced next to the target name file is written to the buffer N3 next to the buffer 1j configured in a ring shape.

  In the next step, the file system 1e ′ reads from the hard disk drive 1f the frame F4 to be reproduced next to the file with the name to be reproduced designated by the operation of the operator from the operation input receiving unit 1b, and the read reproduction. The frame F4 to be reproduced next to the target name file is written to the buffer N4 next to the buffer 1j configured in a ring shape.

  In the next step, the file system 1e 'reads from the hard disk drive the frame F5 to be reproduced next to the file having the name to be reproduced designated by the operation of the operator from the operation input receiving unit 1b, and reads the reproduction target read out. The frame F5 to be reproduced next to the file with the name is written into the buffer N5 next to the buffer 1j configured in a ring shape.

  In the next step, the file system 1e reads from the hard disk drive 1f the frame F6 to be reproduced next to the file having the name to be reproduced designated by the operation of the operator from the operation input receiving unit 1b, and reads the reproduction target read out. The frame F6 to be reproduced next to the file with the name is written into the buffer N6 next to the buffer 1j configured in a ring shape.

  In the next step, the system controller 1d measures and manages whether or not the number of frames for forward reproduction written in the measured buffer is equal to or greater than a predetermined number of frames.

  In the next step, the file system 1e ′, when the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1d exceeds a predetermined number of frames, The process of reading from the hard disk drive 1f is stopped until the number of frames stored in the buffer 1j is less than a predetermined number of frames.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the file system 1e ′ has the number of frame buffers in which the number of frames for forward reproduction written in the buffer measured by the system controller 1d is set. When the number of frames becomes half or more, the process of reading frames from the hard disk drive 1f may be stopped until the number of frames stored in the buffer 1j is less than half of the number of installed frame buffers.

  In the recording / reproducing apparatus according to the present embodiment, the file system 1e ′ is half the number of frame buffers in which the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1c is installed. In such a case, the process of reading frames from the hard disk drive 1f may be stopped until the number of frames stored in the buffer 1j is half the number of installed frame buffers.

  FIG. 11 shows a state in which the frames F1 to F6 read from the hard disk drive 1f, which are the same number of frames as the six predetermined frames, are stored in the buffer of the recording / reproducing apparatus 1 ′ according to the present embodiment. It is a schematic diagram which shows.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the file system 1e ′ starts the process of reading the frame data stored in the buffer 1j and outputting the read frame data to the stream decoder 1h.

  In the next step, when the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1c becomes equal to or larger than the predetermined number of frames, the system controller 1c ' A read process for reading out the frames stored therein is started in the buffer 1j and output to the stream decoder 1h.

  Specifically, the buffer N1 is stored in the buffer N1 when the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1c ′ exceeds a predetermined number of frames. Is read out and is output to the stream decoder 1h.

  When the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1c ′ exceeds the predetermined number of frames, the buffer N2 stores the frames stored in the buffer N2. F2 is read and output to the stream decoder 1h.

  When the number of frames for forward reproduction written in the buffer 1j measured by the system controller 1c ′ exceeds the predetermined number of frames, the buffer N3 stores the frames stored in the buffer N3. F3 is read and output to the stream decoder 1h.

  When the number of frames for forward reproduction written in the buffer measured by the system controller 1c ′ exceeds the predetermined number of frames, the buffer N4 stores the frame F4 stored in the buffer N4. Is output to the stream decoder.

  When the number of frames for forward reproduction written in the buffer measured by the system controller 1c ′ exceeds the predetermined number of frames, the buffer N5 stores the frame F4 stored in the buffer N4. Is output to the stream decoder.

  When the number of frames for forward reproduction written in the buffer measured by the system controller 1c ′ exceeds the predetermined number of frames, the buffer N6 stores the frame F6 stored in the buffer N6. Is output to the stream decoder.

  The system controller 1c ′ reads out the frames F1 to F4 from these buffers N1 to N6 and sequentially transfers the read frames F1 to F4 to the stream decoder 1h at the frame speed necessary for standard reproduction. Let it run.

  FIG. 11 to FIG. 18 are diagrams for explaining transfer processing for transferring frame data from the buffer 1j to the stream decoder 1h at the time of forward reproduction by the recording / reproducing apparatus 1 ′ according to the present embodiment.

  In FIG. 11 described above, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the data of the frame F7 executed by the file system 1c ′ from the hard disk drive 1f, and writes the data related to the read frame of F7 to the next data. Processing for storing the data in the buffer N7 as a position, and reading the data of the frame F1 stored in the buffer N1 with the next data reading position executed by the buffer 1j as the buffer N1, and transferring the read F1 data to the stream decoder 1h It shows that the processing to be executed is started in parallel.

  In FIG. 12, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the data of the frame F7 executed by the file system 1c ′ from the hard disk drive, and buffers the read data regarding the frame of F7. The processing to be stored in N7 and the processing to read the data of the frame F1 stored in the buffer N1 executed by the buffer 1j and transfer the read F1 data to the stream decoder are executed in parallel. Show. In this state, the next data writing position of the frame read from the hard disk drive 1f is the buffer N8, and the next data reading position for reading the frame data from the buffer is the buffer N2.

  Further, the reproduction process proceeds, and in FIG. 13, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the data of the frame F16 executed by the file system 1c ′ from the hard disk drive, and the read data about the frame of F16. Is stored in the buffer N16, and the process of reading the data of the frame F10 stored in the buffer N10 executed by the buffer 1j and transferring the read data of F10 to the stream decoder is executed in parallel. It is shown that. In such a state, the next data write position of the frame read from the hard disk drive 1f is the buffer N1, and the next data read position for reading the frame data from the buffer 1j is the buffer N11.

  Further, the reproduction process proceeds for one frame. In FIG. 14, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the data of the frame F7 executed by the file system 1c ′ from the hard disk drive, and reads the F7 read out. In parallel, the process of storing the data related to the frame N7 in the buffer N7 and the process of reading the data of the frame F11 stored in the buffer N1 executed by the buffer 1j and transferring the read data of F11 to the stream decoder Indicates that it is running. In this state, the next data write position of the frame read from the hard disk drive 1f is the buffer N2, and the next data read position for reading the frame data from the buffer 1j is the buffer N12.

  Here, the file system 1c ′ reads the data of the frame F17 from the hard disk drive 1f, writes the read data of the frame F17 to the buffer N1, and overwrites the data of the frame F1 already stored in the buffer N1. Run by doing. As a result, the data of the frame F1 stored in the buffer N1 is erased by overwriting.

  Further, as the frame playback process proceeds, in FIG. 15, the recording / playback apparatus 1 ′ according to the present embodiment reads the data of the frame F70 executed by the file system 1c ′ from the hard disk drive 1f, and reads the read F7. The process of storing the data relating to the frame in the buffer N6 and the process of reading the data of the frame F64 stored in the buffer N16 executed by the buffer 1j and transferring the read F64 data to the stream decoder 1h are performed in parallel. Indicates that it is running. In this state, the next data write position of the frame read from the hard disk drive 1f is the buffer N7, and the next data read position for reading the frame data from the buffer 1j is the buffer N1.

  As described in detail above, the name of the file to be played and the forward playback request for playing back the video signal recorded on the hard disk drive 1f are input by the operator's operation from the operation input receiving unit 1b. In this case, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the frame data from the hard disk drive 1f and stores the data related to the read frame in the buffer. The stored frame data is read, and the data read position for executing the process of transferring the read frame data to the stream decoder is sequentially moved in the clockwise direction, and the data related to the frame read from the hard disk drive is stored in the buffer. Already stored in the buffer Frame is when stored is the data of the frame already stored in the buffer and performs a process of overwriting the data of the frame read from the hard disk drive.

  On the other hand, in the state of FIG. 15, the name of the file to be played and the reverse playback request for playing back the video signal recorded on the hard disk drive are input from the operation input receiving unit by the operator's operation. In such a case, the recording / reproducing apparatus 1 ′ according to the present embodiment reads the frame data executed by the file system 1c ′ from the hard disk drive 1f, and stores the data related to the read frame in the buffer 1j. The data write position to be executed and the data read position to execute the process of reading the frame data stored in the buffer 1j executed by the buffer 1j and transferring the read frame data to the stream decoder 1h are counterclockwise. Execute processing to move along.

  Specifically, the recording / reproducing apparatus 1 ′ according to the present embodiment reverses the name of the file to be reproduced and the video signal recorded on the hard disk drive 1f in the reverse direction by the operation of the operator from the operation input receiving unit 1b. As shown in FIG. 16, the frame data executed by the file system 1c ′ is read from the hard disk drive 1f, and the data related to the read frame is buffered as shown in FIG. The data write position for executing the process to be stored in 1j and the data read for executing the process of reading the frame data stored in the buffer 1j executed by the buffer 1j and transferring the read frame data to the stream decoder 1h Processing to move the position one buffer along the counterclockwise direction Execute.

  That is, in the recording / reproducing apparatus 1 ′ according to the present embodiment, the data write position for executing the process of reading the frame data from the hard disk drive 1f and storing the read frame data in the buffer 1j is from the buffer N1 to the buffer N16. And move one frame counterclockwise.

  Further, in the recording / reproducing apparatus 1 ′ according to the present embodiment, the data read position for executing the process of reading the frame data stored in the buffer 1j and transferring the read frame data to the stream decoder 1h is the buffer N7. To the buffer N6 by one frame counterclockwise.

  Specifically, in the recording / reproducing apparatus 1 ′ according to the present embodiment, as shown in FIG. 17, the buffer 1j writes the data of the frame F64 that has been written to the frame reading position N16 and has already been used once. And the data of the read frame F64 is output to the stream decoder 1h.

  Thereafter, in the recording / reproducing apparatus 1 ′ according to the present embodiment, N16 which is the frame reading position is moved counterclockwise and moved to the buffer N15.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the file system 1c reads the frame data from the hard disk drive 1f, and stores the data related to the read frame in the buffer 1j at the current data writing position. A process of writing to the buffer N6 is executed.

  At this time, the frame to be written in the buffer N6 must be moved in the direction of returning the frame in the reverse direction from the frame F70 stored in the buffer 1j last in the forward reproduction direction, and the frame already stored in the buffer 1j. Therefore, the frame F54 obtained by subtracting the number of frames 16 of the buffer from the frame 70 finally stored in the buffer is used.

  That is, in the recording / reproducing apparatus 1 ′ according to the present embodiment, the data read position executed by the buffer 1j is moved counterclockwise by one frame, and the frame data stored in the buffer is read and read. The process of transferring the frame data to the stream decoder 1h and the data writing position for writing the frame data executed by the file system 1c ′ are moved counterclockwise by one frame, and finally played back in the forward playback. In parallel with the process of reading the data of the frame obtained by subtracting the number of installed buffers from the frame read from the hard disk 1f and stored in the buffer 1j from the hard disk drive 1f, and storing the data related to the read frame in the buffer 1j Process to be executed every frame Execute.

  Through the series of processes as described above, the recording / reproducing apparatus 1 ′ according to the present embodiment ends the reproducing process.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the frame data is read from the hard disk drive 1f, the data relating to the read frame is stored in the buffer, and the frame data stored in the buffer 1j is read. The process of executing the process of transferring the read frame data to the stream decoder 1h in parallel is executed for each frame. However, the present invention is not limited to this, and the recording / reproducing apparatus 1 ′ according to the present embodiment The frame data is read from the hard disk drive 1f, the data related to the read frame is stored in the buffer 1j, the frame data stored in the buffer 1j is read, and the read frame data is transferred to the stream decoder 1h. Multiple processes that execute the process in parallel It goes without saying that it may be executed for each ram.

  Further, in the recording / reproducing apparatus 1 ′ according to the present embodiment, the data read position executed by the buffer 1j is moved counterclockwise by one frame, and the frame data stored in the buffer is read and read. The process of transferring the frame data to the stream decoder 1h and the data writing position for writing the frame data executed by the file system 1c ′ are moved counterclockwise by one frame, and finally played back in the forward playback. In parallel with the process of reading out the data of the frame obtained by subtracting the number of installed buffers from the frame read from the hard disk 1f and stored in the buffer 1j from the hard disk drive 1f, and storing the data relating to the read frame in the buffer 1f Execute the process to be executed for each frame However, the present invention is not limited to this, and the data read position is moved counterclockwise by one frame, the frame data stored in the buffer 1j is read, and the read frame data is transferred to the stream decoder. The data writing position for writing the frame data is moved counterclockwise by one frame, and the buffer installed from the frame read last from the hard disk drive 1f and stored in the buffer 1j by forward reproduction is stored. The frame data obtained by subtracting the number of frames is read from the hard disk drive 1f, and the process of executing the process of storing the data relating to the read frame in the buffer in 1j is performed in parallel for each of a plurality of frames, for example, as shown in FIG. It may be executed every 3 frames F53 and F54 It goes without saying.

  In this case, the recording / reproducing apparatus 1 ′ according to the present embodiment reads out from the hard disk drive in the order of the frame F54, the frame F53, and the frame F52, and processes them in the order of the buffers N6, N5, and N4 formed in a ring shape.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the data reading position is moved by one frame counterclockwise, the frame data stored in the buffer is read, and the read frame data is read by the stream decoder. From the frame transferred to 1h, the data writing position for writing the frame data is moved by one frame counterclockwise, and finally read from the hard disk 1f and stored in the buffer 1j in forward playback. The frame data obtained by subtracting the number of installed buffers is read from the hard disk drive 1f, and the process of storing the data related to the read frame in the buffer 1j is executed in parallel for each frame. Not limited to this, the data reading position is one frame counterclockwise. The frame data stored in the buffer is read, the read frame data is transferred to the stream decoder 1h, and the data write position for writing the frame data is moved counterclockwise by one frame. The frame data obtained by subtracting the number of installed buffers from the last frame read from the hard disk drive 1f and stored in the buffer 1j in the forward reproduction is read from the hard disk drive, and the data relating to the read frame is buffered. Needless to say, only the reverse reproduction processing for executing the processing to be stored in parallel may be executed for each frame or for every plurality of frames.

  Note that when the recording / reproducing apparatus 1 ′ according to the present embodiment performs reverse reproduction to forward reproduction, the frame data read from the hard disk drive 1f is written to the buffer 1j, and the frame read from the buffer 1j is read. The process of outputting data to the stream decoder 1h can be realized by the same method as described above.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the frame length of the buffer 1j has been described as a fixed length. However, the present invention is not limited to this, and it goes without saying that the frame length of the buffer 1j may be variable.

  Further, in the recording / reproducing apparatus 1 ′ according to the present embodiment, the case where the buffer is implemented by hardware has been described, but it goes without saying that the buffer may be implemented by an application on a memory managed by the OS.

  In the recording / reproducing apparatus 1 ′ according to the present embodiment, the storage area used for forward reproduction has priority over the storage area used for backward reproduction with respect to the allocation of the storage area for storing the data stored in the buffer 1j. A first setting, a second setting in which a storage area used for backward reproduction has priority over a storage area used for forward reproduction, and a storage area used for forward reproduction and a storage area used for backward reproduction; It goes without saying that the third setting with the same value may be made selectable by the operation of the operator.

  As described above, according to the present embodiment, in addition to the effects that can be achieved by the first embodiment, the forward standard is maintained by keeping the frames stored in the ring buffer as they are after use. The transition from playback to backward standard playback and the transition from backward standard playback to forward standard playback efficiently use the frames stored in the buffer and efficiently change the forward and reverse directions. I can do it.

  Further, according to the present embodiment, the frame buffer is configured in a ring shape, and in the frame buffer operation, the read frame data read operation data from the hard disk drive is stored and the frame data is reproduced. Since the output operation frame position is at a certain distance, the operation for accumulating the read frame data from the HDD and the output operation for reproducing the accumulated frame data can be performed in parallel.

  Furthermore, according to the present embodiment, even if the buffer configuration is shifted from forward standard reproduction to backward reproduction, the frame data in the buffer is left as it is without erasing the frame data in the buffer. Decrease.

  In addition, according to the present embodiment, when the normal playback is changed from the forward normal playback to the reverse playback, the frame data is effectively used when the backward playback is returned to the forward playback after the reverse playback. I can do it.

  Further, according to the present embodiment, it is not necessary to delete the stored frame read into the unit buffer in the buffer composed of a plurality of unit buffers formed in a ring shape. Since the buffer is configured in a ring shape, reading the necessary frames one after another from the HDD and overwriting the buffer automatically erases frames with low utility value, eliminating the need to erase unnecessary frames Is efficient.

  Furthermore, according to the present embodiment, the frame data from the HDD is read and stored in the unit buffer in a buffer composed of a plurality of unit buffers formed in a ring shape. By operating the frames together, continuous data is read from the HDD, and the efficiency is increased.

  Also, according to the present embodiment, in the case of reverse playback, when reading a plurality of frames from the HDD, the seek operation of the HDD is entered by reading the frames collectively in the ascending order without reading them in the descending order. In addition, the reading speed of the frame data from the HDD recording storage is increased, and the system performance is improved.

  Furthermore, according to the present embodiment, the number of forward frames stored in the buffer used in the system is set to be less than half of the number of unit buffers formed in a ring shape, or set to be more than half. By making it possible to select settings such as halved settings, etc., there is a balance between settings that focus on forward playback, settings that focus on reverse playback, or forward playback and reverse playback. It is possible to select the settings that have been taken.

  In addition, according to the present embodiment, there is no need for a large system change, and the number of frames set in advance for the forward frame stored in the buffer that temporarily stops reading frame data from the HDD is set to the buffer. Since it is only necessary to determine the total number of frames, it can be easily adapted to various systems.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention in the implementation stage. Further, the above embodiment includes inventions at various stages, and various inventions can be generated by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is generated by omitting some requirements from all the constituent requirements shown in each embodiment, the omitted part is supplemented by a well-known common technique at the stage of implementing the generated invention. Is.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.

1 is a block diagram showing an overall configuration of a recording / reproducing apparatus 1 to which a recording apparatus according to an embodiment of the present invention is applied. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a figure for demonstrating the execution process of the recording / reproducing apparatus 1 which concerns on the same embodiment. It is a block diagram which shows the whole structure of recording / reproducing apparatus 1 'to which the reproducing | regenerating apparatus which concerns on one embodiment of this invention is applied. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment. It is a figure for demonstrating the execution process of recording / reproducing apparatus 1 'which concerns on the same embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus, 1 'Recording / reproducing apparatus, 1a Video input part, 1b Operation input reception part, 1b' Operation input reception part 1c Stream encoder, 1d system controller, 1d 'system controller, 1e file system, 1e' file system, 1f hard disk, 1g synchronization processing unit, 1h stream decoder, 1i video output unit, 1j buffer

Claims (15)

File size determining means for determining the size of a dummy file per unit to be stored in the storage area of the storage means before writing the video signal to the storage means having a storage area in which the video signal is stored;
Dummy file writing means for storing a plurality of dummy files to which an arbitrary name including at least a serial number is given in a storage area of the storage means at a size determined by the file size determining means;
First dummy data writing means for writing dummy data in each dummy file;
Dummy file determining means for determining a dummy file to which the video signal is written;
Video signal writing means for writing the video signal to the dummy file determined by the dummy file determining means;
File name changing means for changing the name of the dummy file by changing only the part other than the serial number of the names assigned to the dummy file, with respect to the dummy file to which the video signal is written by the video signal writing means; ,
When the size of the data of the video signal written by the video signal writing unit is less than the size of the dummy file determined by the file size determining unit, the size of the data is determined by the file size determining unit. A recording apparatus comprising: second dummy data writing means for writing predetermined dummy data as termination data after the video signal until the file size becomes equal   2. The process according to claim 1, further comprising initialization processing execution means for executing initialization processing for all the storage areas of the storage means before writing the video signal to the storage means having a storage area in which the video signal is stored. The recording device described.   When the video signal is erased, the data stored in the file remains stored in the storage unit, and the file name changed by the file name changing unit is changed before the file name changing unit changes the file name. The recording apparatus according to claim 1, further comprising second file name changing means for changing the name. The dummy file determining means
A dummy file including a first number and a second number greater than the first number among the names assigned to the respective dummy files during recording of the video signal. The recording apparatus according to claim 1, wherein the dummy file to which the video signal is written is determined so that the distribution of the dummy file to which the video signal is written in combination is substantially uniform. File name assigning means for assigning an arbitrary name including at least a serial number to each dummy file,
The dummy file determining means
The video signal is recorded such that a dummy file including the largest number included in the name among the names assigned to the dummy files at the time of recording the video signal is a dummy file into which the video signal is written. Determine the dummy file to write
The file name changing means is
When erasing the video signal, the name given by the file name assigning means is changed to the name given by the file name assigning means while the data stored in the file remains stored in the storage means. The recording apparatus according to claim 1, wherein the name is changed to a name including at least a number obtained by adding 1 to a number included in the name. Byte number writing means for writing the number of bytes of video data written in the dummy file to a predetermined area in the dummy file determined by the dummy file determining means at the time of recording the video signal;
An output means for reading out only the number of bytes written by the number-of-bytes writing means out of all the data in the dummy file at the time of reproducing the video signal and outputting to the reproducing means for reproducing the video signal; The recording apparatus according to claim 1. A file size determination step for determining a size of a dummy file per unit to be stored in a storage area of the storage means before writing the video signal to a storage means having a storage area in which the video signal is stored;
A dummy file writing step of storing a plurality of dummy files to which an arbitrary name including at least a serial number is assigned in a storage area of the storage unit at a size determined in the file size determination step;
A first dummy data writing step of writing dummy data in each dummy file;
A dummy file determining step for determining a dummy file to which the video signal is written;
A video signal writing step of writing the video signal to the dummy file determined in the dummy file determination step;
A file name changing step for changing the name of the dummy file by changing only the portion other than the serial number among the names assigned to the dummy file, with respect to the dummy file to which the video signal is written in the video signal writing step. ,
When the size of the data of the video signal written in the video signal writing step is less than the size of the dummy file determined in the file size determining step, the size of the data is determined in the dummy determined in the file size determining step. And a second dummy data writing step of writing predetermined dummy data as termination data after the video signal until the file size becomes equal.   When the video signal is erased, the data stored in the file is left as it is, and the file name changed in the file name changing step is changed to a name before being changed in the file name changing step. The recording method according to claim 7, further comprising a file name changing step. First storage means in which a video signal including a plurality of frames is stored;
Video signals read from the first storage means are stored, and second storage means composed of a plurality of unit buffers formed in a ring shape;
Video data writing means for reading the video signal from the first storage means for each of a plurality of frames and writing the read video signal to the second storage means for each of a plurality of frames when reproducing the video signal; ,
When playing back the video signal in time series, if the number of frames included in the video signal stored in the second storage means is greater than or equal to a predetermined number of frames, the video signal is Reading stop means for stopping the process of reading from the first storage means until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames;
Reading restarting means for restarting the process of reading the video signal stopped by the reading stopping means from the first storage means;
A reproduction apparatus comprising: reproduction means for reproducing the video signal stored in the second storage means in the forward direction or the reverse direction. The reading stop means is
When playing back the video signal in time series, if the number of frames included in the video signal stored in the second storage means is greater than or equal to a predetermined number of frames, the video signal is Stop the process of reading from the first storage means until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames,
The reading restarting means includes
The playback apparatus according to claim 9, wherein the process of reading out the video signal stopped by the reading stop unit from the first storage unit is resumed.   Regarding the allocation of the storage area for storing the data stored in the second storage means, the storage area used for forward playback is used for the first setting, reverse playback, which has priority over the storage area used for backward playback. The operator sets the second setting that gives priority to the storage area used for the forward reproduction and the third setting for making the storage area used for the forward reproduction and the storage area used for the backward reproduction the same. The playback device according to claim 9, wherein the playback device is made selectable by an operation. At the time of forward reproduction of the video signal, the frame data is read from the first storage means, the data relating to the read frame is stored in the second storage means, and the frame stored in the second storage means The reproducing apparatus according to claim 9, wherein the process of reading data and transferring the data of the read frame to the reproducing unit is executed in parallel. The second storage means is
It consists of a buffer composed of multiple unit buffers formed in a ring shape,
When the video signal is reproduced in the reverse direction, a data read position for reading frame data from the plurality of unit buffers formed in the ring shape is moved counterclockwise by one frame, and a plurality of ring signals formed in the ring shape are moved. The process of reading the frame data stored in the unit buffer, transferring the read frame data to the reproducing means, and moving the data writing position for writing the frame data counterclockwise by one frame to move forward Data of a frame obtained by subtracting the number of buffers forming the plurality of unit buffers formed in the ring shape from the frame read from the first storage unit and stored in the second storage unit at the end of reproduction. A plurality of data that are read from the first storage means and data related to the read frame are formed in the ring shape. Position reproducing apparatus according to claim 9 and a process of storing in the buffer to execute in parallel. When playing back a video signal, the video signal is read for each of a plurality of frames from a first storage means storing a video signal including a plurality of frames, and the read video signal is read for each of a plurality of frames. A video data writing step in which a video signal read from the storage means is stored and written to a second storage means configured by a plurality of unit buffers formed in a ring shape;
When playing back the video signal in time series, if the number of frames included in the video signal stored in the second storage means is greater than or equal to a predetermined number of frames, the video signal is A reading stop step of stopping the process of reading from the first storage means until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames;
A reading restarting step of restarting a process of reading out the video signal stopped by the reading stopping step from the first storage means. When the video signal is reproduced in the reverse direction, the reading order of reading out the frames from the first storage means storing the video signals including a plurality of frames is set so that the frame numbers assigned to the respective frames are in ascending order. A video signal is read out for each of a plurality of frames, and the read video signal is stored in the video signal read out from the first storage means, and is composed of a plurality of unit buffers formed in a ring shape. A video data writing step for writing to each of the plurality of frames in the storage means;
When playing back the video signal in the reverse direction, if the number of frames included in the video signal stored in the second storage means exceeds a predetermined number of frames, the video signal is A reading stop step of stopping the process of reading from one storage means until the number of frames included in the video signal stored in the second storage means is less than a predetermined number of frames;
A read resuming step of resuming a process of reading out the video signal stopped by the read stop step from the first storage means;
Reverse playback for executing reverse playback processing in which frames are sequentially read out and played back in a reverse direction so that the reading order for reading frames from the second storage means is in descending order of the frame numbers assigned to the frames. A reproduction method including the steps.

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