KR20070013541A - Method and apparatus for making space for recording video signal on a recording medium - Google Patents

Abstract

A method and an apparatus for securing an image signal recording space on a recording medium are provided to enhance the utilization of a recording medium by maximally using empty spaces of the recording medium in case of the recording medium needing a space for one continuous recording program. A microcomputer compares a size of a deleted recording program with the size of an empty space located in the outermost circumference of a recording medium(S501). The microcomputer moves and records one or more programs recorded in the recording medium to be mutually continued, and collects empty spaces according to the compared result. If the size of the deleted recording program is greater than the size of the empty space located in the outermost circumference, the microcomputer performs the operation for collecting the empty spaces.

Description

Method and apparatus for securing a video signal recording space on a recording medium {Method and apparatus for making space for recording video signal on a recording medium}

1 shows an example in which empty spaces are scattered while programs recorded on a disk medium are selectively deleted.

2 is a configuration of an embodiment of an optical recording medium recording / reproducing apparatus in which a method for securing a program recording space according to the present invention is performed;

3 shows an example of a menu screen for registering reservation recording of a broadcast program.

4 to 6 schematically show each case where the empty space collecting operation is performed according to a preferred embodiment of the present invention.

7 is an example of a guide screen for inquiring the user whether the empty space collecting operation is performed according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

2: optical pickup 10: tuner

12: encoder 13: recording DSP unit

14: optical drive unit 20: RF unit

21: playback DSP section 22: decoder

24: synthesizer 30: microcomputer

31: servo control unit 32: memory

33: OSD section 34: Clock section

The present invention relates to a method and apparatus for securing a space for recording an image, for example a broadcast program, on a recording medium.

As a variety of broadcast channels by terrestrial, cable, satellite broadcasting, etc. are diversified, users frequently record a desired program on a disc medium, which is a digital recording medium, and watch it at a desired time. Therefore, many programs are reproduced after recording and deleted after being reproduced.

However, a user generally selects and plays a program to be played first according to his or her own preference, regardless of the recording order, and then deletes the played program. Therefore, if all the recorded programs are not continuously viewed at one time, the positions of the recorded programs remaining on the disc medium are sporadically positioned as illustrated in FIG. 1, and thus, the recordable space 101 _N is also scattered. do.

By the way, the most widely used disc media for recording images digitally are DVD + R and DVD-R, among which DVD-R makes data recording random and The set can be managed by one recording program, but DVD + R must be a data section in which program units generated by recording once are continuously recorded.

Therefore, when the recording medium having the recording space as in the example of FIG. 1 is DVD + R, the total recordable space is approximately 2 hours (when in the EP recording mode with a data bit rate of 2.45 Mbps / sec). If the size of the empty space 101 ₃ is, for example, about 30 minutes, a broadcast program having a recording time exceeding that time cannot be recorded. If recording is in progress, only 30 minutes are recorded and recording is stopped even though there is a recordable space therein.

Accordingly, the present invention has been made to solve the above problems, and an object thereof is to allow a user to fully utilize the recordable space of a recording medium such as DVD + R that requires continuous space for recording. A method and apparatus for making scattered recordable space into a continuous recordable space are provided.

In order to achieve the above object, the present invention, when the empty space interspersed with the recording medium meets a certain condition, by moving and recording one or more programs recorded on the recording medium so as to be continuous with each other, the scattering on the recording medium The empty spaces are characterized in that they become one continuous empty space.

In one embodiment according to the present invention, the empty spaces scattered on the recording medium are collected so that a continuous empty space is formed on the outer circumferential side.

In one embodiment according to the present invention, when the size of the deleted recording program is larger than the size of the empty space at the outermost periphery of the recording medium, the scattered empty space is collected.

In another embodiment according to the present invention, an empty space interspersed when the sum of the sizes of the remaining empty spaces scattered on the recording medium is larger than the size of the empty spaces excluding the empty space at the outermost periphery of the recording medium. Collect.

In another embodiment according to the present invention, the empty spaces scattered when the size of the deleted recording program can record the video signal for more than a reference time are collected.

In another embodiment according to the present invention, the sum of the sizes of the empty spaces scattered on the recording medium collects the empty spaces scattered when the video signal can be recorded for a reference time or more.

In another embodiment according to the present invention, the sum of the sizes of the empty spaces scattered and insufficient for accommodating the amount of data by the video signal during the designated recording time is the size of the empty space at the outermost periphery of the recording medium. If the amount of data can be accommodated, the scattered empty space is collected.

In one embodiment according to the present invention, the operation of collecting the scattered empty space is executed when the user is inquired and the execution is approved.

Hereinafter, a preferred embodiment of a method and apparatus for securing a recording space of a video signal according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram showing the configuration of an embodiment of a recording / reproducing apparatus for an optical recording medium in which a method for securing a recording space of a video signal according to the present invention is performed.

The optical record carrier recording / reproducing apparatus of FIG. 2 includes a tuner 10 for tuning a television broadcast signal, converting the tuned video signal into digital, and then encoding the encoded video signal, for example, in an MPEG method and audio encoding the encoded data. And an encoder 12 which converts the packetized elementary stream (PES) packets of the video into muxing outputs, and configures the PES packet sequence in an ECC block format and modulates the signal into a signal for recording. 13, an optical driver 14 for applying a recording beam driving current to the optical pickup 2 according to an input signal, or reading a signal from an optical recording medium 1 such as DVD +/- R or the optical driver ( An RF unit for outputting the optical pickup 2 for recording a signal from 14, a reproduction signal binarized from the read signal, and an electrical signal for focusing error (FE) signal and tracking error (TE); 20), the binarized reproduction signal A reproduction DSP unit 21 for restoring digital information and separately outputting management information and navigation data from the restored data, and audio and video PES packets from a muted PES packet sequence which is output data of the reproduction DSP unit 21. A decoder 22 for decoding and outputting the A / V signal from the decoder 22, an OSD unit 33 for generating text and graphics signals, a synthesizer 24 for synthesizing the video signal and the text and graphics signals, and A servo controller for controlling the optical pickup 2 and its incident beam (for recording and reproducing) and driving the spindle motor M for rotating the optical recording medium 1 according to a focusing error signal and a tracking error signal ( 31), a memory 32 in which data such as a scheduled recording item list and navigation information are stored, a clock unit 34 that tracks the current date and time, and a user input and processes recording / playback operations. It consists of a microcomputer 30 for controlling the volume.

When the user selects the reserved recording menu through a user input means provided in the recording / playback apparatus, for example, a remote controller, the microcomputer 30 controls the OSD unit 33. Configure the scheduled recording menu screen as shown in 3 and print it out. Reception of the remote control signal is made through a conventional infrared receiver (not shown), which is interpreted by the microcomputer 30. In the menu screen display, the user selects one of the channel, recording time (start and end time including date), and recording mode (HQ, SP, LP, EP and SLP) that he / she wants to reserve by key input on the remote control. ) And the recording method. Here, the recording method may be once, daily, weekly or the like.

When the reservation item is set as described above and 'complete' is selected, the microcomputer 30 registers the reserved reservation item in the reserved recording list of the memory 32. Through the above process, all programs desired by the user are registered in the reserved recording list of the memory 32. After setting such a reservation recording, the user usually turns off the power of the recording / reproducing apparatus and puts it into the standby state. In the standby state, it does not provide the operating power except for the components necessary for checking the time and confirming the user's power on / off request.

The microcomputer 30 has a current date / time tracked by the clock unit 34 in a standby state, for example, 30 minutes before the start time of any one recording time zone of the preset recording item. Monitor At 30 minutes before the start time, all the components are supplied with operating power to switch to the operating state, and the servo control unit 31 is controlled to assume the mounted disk 1 (DVD + R disk). The judgment is made according to a conventional known technique.) A) is rotated to a proper reproduction speed, and the optical pickup 2 is moved to a navigation area on the disc 1 so as to read a navigation file recorded in that area. The signal read by the optical pickup 2 is converted into a binary signal by the RF unit 20 and then restored to navigation information by the reproduction DSP 21 and then provided to the microcomputer 30. This navigation information is stored in the memory 32 for reference when necessary. The microcomputer 30 calculates a recording area of each program recorded on a disc currently mounted from the navigation information and the resulting empty space. In the example of FIG. 1, the size of each of the empty spaces 101 ₁ , 101 ₂ , and 101 ₃ scattered with each other is determined to be approximately 882 Mbytes, 772 Mbytes, and 551 Mbytes.

Then, the reserved recording (hereinafter, abbreviated as 'Yen recording') to be recorded soonest is checked for the recording mode for the set item, and the recordable time of each free space is calculated accordingly. Assuming that the set recording mode is EP (data bit rate is 2.45 Mbps / sec), as shown in Fig. 1, the recordable time of each free space is about 48, 42 and 30 minutes.

The microcomputer 30 compares the recording time of the program to be recorded according to the pre-recording item with 50 minutes in the example of FIG. 3 with the recordable time of the empty space 101 ₃ located at the end, and compares the pre-set program. If it is impossible to record in the space, as shown in FIG. 4, the recordable time (about 120 minutes) of the entire free space is compared with the recording time of the pre-recorded program (S401). If it is larger than the recording time, a continuous empty space making operation is performed on the outer circumferential side (S402).

That is, the microcomputer 30 reads the data of the second program prg # 2 recorded after the first empty space 101 ₁ , stores the data in the memory 32, and then stores the data in the memory 32 again. The optical drive unit 14 allows recording from the beginning of the empty space 101 ₁ . Since the temporary storage space of the memory 32 is limited in capacity, the optical pickup 2 is read through the servo control unit 31 after reading data of a program as much as the memory 32 allows and storing the last read position. After moving the position of the recording beam in the first empty space (101 ₁ ), data stored temporarily in the memory 32 from the position is recorded. When all the temporarily stored data is recorded, the last recording position is memorized, and then the reproduction beam of the optical pickup 2 is moved to the last playback position previously stored so that the data of the recording program is subsequently read out and the previously stored recording is again performed. It will record from the location. When this process is performed for the second recorded program prg # 2, the first program prg # 1 and the second program prg # 2 are continuous with each other. Then, the microcomputer 30 updates the recording position information of the second program prg # 2 in the navigation information stored in the memory 32 to match the moved position. This completes the first move of the program.

Next, the data of the third recording program prg # 3 is read and subsequently recorded after the second program prg # 2 moved earlier. Similarly, the third program prg # 3 of the navigation information in the memory 32 is stored. The information on the recording position is updated to match the moved position. As a result, all the interspersed empty space becomes one continuous empty space 403 after the program recording area. Immediately after this process is finished, the microcomputer 30 writes the updated navigation information in the memory 32 into the navigation file of the disc 1. This is to prevent inability to play the recorded moving program due to a discrepancy between the actual recorded data position and the navigation information, for example, when the disk is ejected after the moving recording of the program and before the update of the navigation file information. .

If the total recordable time of the recording spaces scattered in the comparison process (S401) is smaller than the recording time of the pre-set program, the recording is not performed at the reserved recording time or only for the empty space 101 _{3 at the} last position. A normal recording operation of recording is performed (S410).

When the empty space collecting operation as described above is finished, the current tracking time of the clock part 34 checks whether the microcomputer 30 is the recording start time of the pre-set program, and when the start time reaches the tuner 10. To control the reserved recording channel.

Accordingly, the video signal received in the tuned channel is encoded by MPEG by the encoder 12 and then composed of PES packets, and the packet sequence is an ECC block for error correction by the recording DSP 13. After being configured in a format, it is modulated into a recording signal and recorded along the track, starting from the beginning of the single empty space 403 of the outer periphery secured to the disc 1 through the optical drive unit 14 and the optical pickup 2. . That is, the broadcast program of the preset item starts to be recorded. While recording is in progress, the microcomputer 30 divides the recorded data into navigation units (VOBUs) and generates a time entry that records the size and presentation time length for each of the divided navigation units. The division of the navigation unit is made up of one or a plurality of GOP (Group of Pictures) units included within 0.4 to 1 second encoded by the encoder 12.

During the above recording, when the current time of the clock unit 34 reaches the end time of recording, the recording is terminated and the generation of each time entry is terminated, and the navigation information for the recorded program is generated. The navigation information generated at this time includes cell information on the video recording section, program information (PGI) referring to the cell information, and program chain information (PGC) information for managing the recorded section as one title. do. When such information is generated, it is recorded in a navigation file in the navigation recording area of the disc 1 together with the time entry information generated during recording. Since the existing navigation information is already loaded in the memory 32 at the time of initial loading of the disc 1, it is updated by adding the navigation information generated according to the recording to the loaded navigation information, and then updated The entire navigation information is recorded in the navigation file of the disc 1 through the recording DSP unit 13 and enters the standby mode for confirming only user input, thereby terminating the recording operation.

Even if one broadcast program cannot be recorded as the empty spaces scattered by the above process, if the entire empty space can accommodate the recording time of the broadcast program, the broadcast program can be recorded.

The above-mentioned empty space collecting process is different from the pre-recording time of the Ennock item, for example, if the user requests power-off after setting the pre-record, compare the recorded empty space with the recording time of the pre-set program. The aforementioned empty space collecting operation may be performed and the standby mode may be entered.

Hereinafter, another embodiment according to the present invention for securing a continuous recording space will be described.

In this embodiment, as shown in FIG. 5, the last empty space 101 ₃ of the disc 1 is interspersed with other spaces, and two empty spaces 101 ₁ preceding it in the example of FIG. , is less than the sum of the size of 101 ₂₎ is carried out on (S501). A recording apparatus for recording on a DVD + R disc usually does not start recording in the inner empty space 101 ₁ or 101 _{2 in} order to prevent the interruption of recording due to the absence of continuous empty space during recording. Start with an empty space (101 ₃ ). Therefore, when the size of the last empty space is small, it is advantageous to collect the capacity of the inner empty space in the last empty space to accommodate the recording of as much time as possible when the user wants to record. However, even if the size of the empty space inside is small, in order to prevent the empty space collecting operation from being performed when the sum of the size of the empty space inside is larger than the size of the last empty space.

The above-mentioned empty space collecting operation may be performed after an operation power is applied to the apparatus to perform an initialization operation, for example, adjusting a servo characteristic for recording or reproducing a disk medium, and then checking whether the empty space is distributed. When the condition S501 is satisfied, the empty space collecting operation is performed.

In addition, when a user selects a specific recorded program and deletes the program, the navigation information is modified to make the area of the corresponding recorded program empty, and then the above-described condition check (S501) and the empty space are collected accordingly. You may. In another embodiment according to the present invention, the empty space collecting operation described above may be performed when the size of the deleted program is larger than the size of the last empty space 101 ₃ instead of the condition S501.

In addition, instead of the condition S501 for performing the empty space collecting operation, for example, a ratio (β = SS_Last / SS_Others) of other conditions, for example, the sum of the sum of the remaining empty spaces SS_Others of the last empty space size SS_Last ) Is equal to or less than a predetermined ratio ct (β≤ct), the above-described empty space collecting operation may be performed. If the preset ratio (ct) is set to 2, the empty space collecting is performed when the size of the continuous empty space is 50% larger than the size of the last empty space when all the empty spaces are combined. The above ratio may be set by the user through the environment setting of the recording / reproducing apparatus.

In the following, another embodiment according to the present invention for securing a continuous recording space will be described.

In the present embodiment, as shown in Fig. 6, when deleting a specific program, the deleted program is not a program recorded at the last position, and the space of the deleted program is a specific reference time (broadcast that a normal program has). If the value corresponding to time, for example, 60 minutes or more (S601), the empty space collecting is performed. Here, the recording time calculation of the deleted space is performed according to the recording mode which is automatically set and performed when the recording / reproducing apparatus does not specify the user's specific recording mode. That is, if recording is performed in the EP mode when the user does not specify a specific recording mode, the recordable time is calculated by calculating the size of the deleted program space in the EP mode.

In other words, if the previously deleted space can normally accommodate one broadcast program, it is merged into a contiguous empty space. As mentioned above, a recording apparatus for recording on a DVD + R disc is normally stored in an internal empty space. By starting from the last empty space without starting video recording, it is possible to prevent the recording interruption or the inability to record due to the lack of the last empty space even though the disk has sufficient space to accommodate a program.

In the embodiment of FIG. 6, the empty space collecting is performed when the space size of the deleted inner program is equal to or greater than a predetermined reference time, but not the entire program, but the entire empty space existing before the empty space. When the sum of the sizes exceeds the predetermined reference time, the empty space collecting operation may be performed.

On the other hand, the microcomputer 30 does not automatically perform the above-mentioned empty space collecting operation if the condition is satisfied when the user deletes a specific program, and as illustrated in FIG. 7, through the OSD unit 33, the present When the empty spaces including the recordable time (recordable time for the last empty space) and the space obtained by the deletion of the recorded program are collected, the screen showing the recordable time obtained is presented and the empty space is collected. After outputting a screen inquiring whether to perform or not, in response to the user's consent, the user may execute an empty space collecting operation at that time. Performing the empty space collecting operation according to the user's request prevents the user from waiting for the empty space collecting operation performed automatically by the device when the user wants to request another operation immediately after the deletion of a specific program. can do.

On the other hand, the present invention is not limited to the above-described typical preferred embodiments, but can be carried out in various ways without departing from the gist of the present invention, various modifications, alterations, substitutions or additions are common in the art Those who have knowledge will easily understand. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims, the technical idea should also be regarded as belonging to the present invention.

According to the present invention described in detail above, in the case of a recording medium in which one recording program requires a contiguous space, the video content desired by the user, for example, broadcasting, is maximized by using the empty space of the recording medium. This allows recording of all programs or for as long a time as possible, thereby increasing the utilization of the recording medium.

Claims (13)

In the method of managing a program recorded on a recording medium, Comparing the size of the deleted recording program with the size of the empty space in the outermost circumference of the recording medium; And And recording the empty space by moving and recording one or more programs recorded on the recording medium so as to be continuous with each other according to the comparison result. The method of claim 1, And in step 2, collecting the empty space if the size of the deleted recording program is larger than the size of the empty space in the outermost circumference. The method of claim 1, And updating the navigation information of the moved program according to the moved position and recording it on the recording medium. The method of claim 1, In the step 2, inquiring a user of whether an empty space collecting operation is performed and instructing execution, the empty space collecting is performed. In the method of managing a program recorded on a recording medium, Comparing the size of the first empty space at the outermost periphery of the recording medium with the size of the other empty spaces existing in the recording medium except for the first empty space; And And recording the empty space by moving and recording one or more programs recorded on the recording medium so as to be continuous with each other according to the comparison result. The method of claim 5, In the second step, the empty space is collected if the sum of the sizes is greater than the size of the first empty space. The method of claim 5, The steps 1 and 2 are performed after the deletion of any program not located at the end of the programs recorded on the recording medium. The method of claim 5, The steps 1 and 2 are performed after performing an initial operation on the recording medium. An apparatus for recording a video signal on a recording medium, A receiver for receiving an input video signal; A recording unit for recording the received video signal in a continuous empty space of the recording medium; A reproducing unit for reading a signal recorded on the recording medium; And When the recorded program is deleted, the size of the deleted recording program is compared with the size of the free space in the outermost circumference of the recording medium, and according to the result, the reproducing unit and the recording unit are controlled and recorded on the recording medium. And a control unit for collecting the empty space on the recording medium by moving and recording one or more programs which are continuously connected to each other. The method of claim 9, And the controller is configured to collect the empty space when the size of the deleted recording program is larger than the size of the empty space in the outermost circumference. An apparatus for recording a video signal on a recording medium, A receiver for receiving an input video signal; A recording unit for recording the received video signal in a continuous empty space of the recording medium; A reproducing unit for reading a signal recorded on the recording medium; And After performing a specific operation, comparing the size of the first empty space in the outermost circumference of the recording medium with the size of the other empty spaces existing in the recording medium except for the first empty space, and according to the result, And a control unit which controls the reproducing unit and the recording unit to collect the empty space on the recording medium by moving and recording one or more programs recorded on the recording medium so as to be continuous with each other. The method of claim 11, And the controller is configured to collect an empty space when the sum of the sizes is larger than the size of the first empty space. The method of claim 11, The specific operation is characterized in that the deletion of any program not located at the end of the program recorded on the recording medium.

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