KR100780112B1 - Method and apparatus for recording a video signal discontiguous blocks and managing the recorded discontiguous blocks - Google Patents

Abstract

The present invention relates to a method and apparatus for distributing and recording video signals on a recording medium such as DVD + R and managing distributed recording sections. The recording method according to the present invention includes at least two distributed on a recording medium. Record the video signal requested to be recorded in the empty space, generate recording section information for each recorded section, and generate connection information for considering the generated recording section information as a single recording program. The reproducing method according to the present invention reads the information of each recording section recorded on the recording medium, checks whether a plurality of recording sections which are mutually dispersed constitute a single recording program, and constitutes a single recording program. One replay item for a plurality of distributed recording intervals identified as one, and one replay for each recording interval otherwise. The configuration items will be provided to the user selection screen.

Disc, Free Space, Scattered Recording, Single Title, DVD + R

Description

Method and apparatus for recording a video signal distributedly on a recording medium and managing distributed recording intervals {Method and apparatus for recording a video signal discontiguous blocks and managing the recorded discontiguous blocks}

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

FIG. 2 shows the structure of video recording management information (VRMI) in which VRMI recording information generated after recording once on a DVD + R disc is recorded.

3 is a diagram showing the configuration of an embodiment of a recording / reproducing apparatus for an optical recording medium in which a method of distributed recording and single title management of an input video signal is performed according to the present invention;

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

5 illustrates an example in which empty space for recording is selected according to the present invention;

FIG. 6 illustrates a process in which a single broadcast program recorded in distributed empty spaces is distributedly recorded and a part of VRMI recording information generated according to the present invention.

7 illustrates a structure of VRMI recording information generated for one recorded section, according to the present invention.

8 shows the structure of a recording mode (REC_MODE) recorded in VRMI recording information, according to the present invention;

9 is a diagram schematically showing a method of reproducing distributed recording sections as a single title according to 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 distributing and recording a video object, for example, a broadcast program in spaces spaced apart from each other, and managing the distributed recorded sections.

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 A set can be managed by one recording program (or 'title'), but DVD + R represents one section (hereafter referred to as recording) that is recorded until recording is stopped after starting recording once. Since the recording program (title) is managed, the recording of a single broadcast program set for recording is always performed for continuous empty space. One recorded recording corresponds to one VRMI recording information (VRMI_RECI) in the video recording manager information (VRMI) of FIG. 2, and one VRMI recording information is managed by one recording program (or title). do. That is, it is shown to the user as one recorded program (playback item), and when selected, only the recorded program is played back and playback ends.

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), but continuous recording If the size of the empty space 101 ₃ at the last possible position is, for example, about 30 minutes, a broadcast program having a recording time exceeding the time cannot be recorded. In general, a device for recording a video signal on a DVD + R does not start video recording in the inner empty space 101 ₁ or 101 _{2 in} order to prevent a recording interruption situation due to the absence of continuous empty space during recording. Start with an empty space (101 ₃ ) of. Therefore, in the case of a DVD + R recording medium having an empty space structure as shown in FIG. 1, recording is stopped even though recording is performed for about 30 minutes and there is a recordable space therein, and the VRMI recording for the recorded section is performed. The information is created and recorded.

Accordingly, the present invention has been made to solve the above problems, and the object thereof is to provide a user with a plurality of empty spaces on a recording medium in which consecutively recorded sections are managed as one title, such as DVD + R. A method and apparatus for distributing and recording an input image and managing the same as a title are provided.

In order to achieve the above object, the present invention, when recording the input video signal on the recording medium, recording the video signal requested to record in at least two empty spaces distributed on the recording medium, and recording for each recorded section It is characterized in that the section information is generated and recorded on the recording medium, and the connection information for considering each of the generated recording section information as belonging to a single recording program is recorded.

In addition, when the video signal recorded on the recording medium is reproduced, the present invention reads each recording section information recorded on the recording medium to confirm whether the plurality of recording sections which are distributed to each other constitute a single recording program. One reproduction item is provided for a plurality of distributed recording sections identified as constituting a recording program, and one reproduction item is provided for each recording section that is not provided, and provided as a user selection screen.

In one embodiment according to the present invention, information indicating that it is connected to other VRMI recording information and index information of the connected VRMI recording information are recorded in the VRMI recording information defined for the DVD + R disc medium.

In one embodiment according to the present invention, when the video signal requested to be recorded cannot be accommodated in the last empty space of the recording medium, the video signal requested to be recorded is recorded in at least two empty spaces.

Hereinafter, a preferred embodiment of a method and apparatus for distributed recording and single title management of an input video signal according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram showing the configuration of an embodiment of an optical recording medium recording / reproducing apparatus in which a method of distributed recording and single title management of an input video signal according to the present invention is performed.

The optical recording medium recording / reproducing apparatus of FIG. 3 includes a tuner 10 for tuning a television broadcast signal, converting the tuned video signal to digital, and then encoding the encoded video signal, for example, in an MPEG method, and converting the encoded data into audio. 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 data and separately outputting management information and navigation data from the restored data; and audio and video PES from a mushed PES packet sequence that is output data of the reproduction DSP unit 21. A decoder 22 for decoding and outputting an A / V signal from the packet, and an OSD unit 33 for generating text and graphics signals, a synthesizer 24 for synthesizing the video signal and the text and graphics signals, A servo control unit 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 the focusing error signal and the tracking error signal. 31, a memory 32 in which data such as a list of reserved recording items 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 4. 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. By 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 determines whether the current date / time tracked by the clock unit 34 in the standby state is a predetermined time, for example, three minutes before the start time of any one recording time zone of the preset recording item. Watch. When 3 minutes before the start time, all the components are supplied with operating power to be switched 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 recording item with 50 minutes in the example of FIG. 3 with the recordable time of the last empty space 101 ₃ (S501). If the set program cannot be recorded in the space, as shown in FIG. 5, the head of the first empty space 101 ₁ is determined as the recording start point (S502). If the recordable time of the empty space 101 ₃ of the last position is longer than the recording time of the pre-recorded program, the head position of the last empty space 101 ₃ is determined as the recording start position (S503). For explanation of the present invention, the head of the first empty space 101 ₁ is determined as a recording point according to the result of the comparison (S501), and the recording time of the pre-set program can be recorded in the first empty space 101 ₁ . Assume it is longer than time.

As such, when the position to start recording is determined, the current tracking time of the clock unit 34 determines whether the recording start time of the pre-set program is recorded, and when the start time comes, the tuner 10 is controlled. To synchronize the reserved recording channel.

Accordingly, the video signal received in the tuned channel is encoded by MPEG by the encoder 12 and then constituted by PES packets, and the packet sequence is an ECC block for error correction by the recording DSP unit 13. After being configured in a format, it is modulated into a recording signal and recorded along the physical track starting from the beginning of the first empty space 101 ₁ on 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.

During the above recording, when the end point of the empty space, that is, the start position where another program is recorded, as shown in FIG. 6, the recording is stopped and the currently recorded section (C_Rec # 1), that is, the currently generated Create VRMI recording information 601 for the recording. The recording information configured at this time has the structure as shown in FIG. 7, and the configured information is recorded in the second VRMI recording information (VRMI_RECI # 2) area in the VRMI of FIG. 2. Before recording this configuration information, a value of 02h is recorded in the 'REC_ST' field to indicate that the recording 101 ₁ corresponding thereto is deleted in the second VRMI recording information (VRMI_RECI # 2) (VRMI recording information Indicates that the record has been deleted, the corresponding recording will be empty.

When composing the VRMI recording information, the microcomputer 30 records 01h (not deleted) in the 'REC_ST' field, and records the recording date and time (REC_DATE, REC_TIME) and the last recording in other applicable fields. The position information REC_E_A and the title information REC_NM of the recorded program are recorded. Since specific values recorded in each field are not directly related to the present invention, detailed description thereof will be omitted.

In connection with the present invention, the microcomputer 30 records, for example, 01b in two bits of 'C_TT' (Chained_Title) in the 'REC_MODE' field having the structure as shown in FIG. 8 (single recording without connected recording). For the recording managed by one title, 00b is recorded in the 'C_TT' field. This is to indicate that the corresponding recording constitutes one title together with other linked recordings. Then, the index value of the VRMI recording information corresponding to the next empty space 101 ₂ to record the broadcast program currently stopped recording in the subsequent connected field N_CH_REC in the VRMI recording information, 4 in the example of FIG. 6. Record the value of. Since there is no recording connected to the front end, a value of '-1' indicating that no recording is connected is recorded in the front connected recording field P_CH_REC.

As described above, addition / modification of information related to recording is performed with respect to the navigation information loaded into the memory 32 at the time of mounting of the disc 1, and this updated navigation information ends the recording operation. Later, the disc 1 is copied and recorded.

On the other hand, during the construction of the VRMI recording information as described above, the PES packets encoding the input video signal are buffered.

When the microcomputer 30 completes the VRMI recording information for the recording C_Rec # 1 generated in the first empty space 101 ₁ , the microcom 30 transfers the optical pickup 2 to the next empty space through the servo controller 31. Go to (101 ₂ ). The next empty space is obtained by adding 1 (logical block unit) to the value recorded in the 'REC_E_A' (End Address of Recording) field in the previous VRMI recording information of the VRMI recording information in which the 'REC_ST' field is 'Deleted'. This can be seen from the value. This is because the address of the last position of the corresponding recording is recorded in the 'REC_E_A' field.

After moving to the empty space 101 ₂ , the recording operation for the buffered PES packet and the input video signal is resumed, and the recording operation proceeds until the set recording end time. When the current time of the clock unit 34 reaches the recording end time, the recording is terminated and the VRMI recording information 602 for the currently generated recording C_Rec # 2 is configured. Before recording this configured information to VRMI, VRMI recording information (VRMI_RECI # 4 to #) for the previous empty space 101 ₂ , another recorded program (prg # 2), and the last empty space 101 ₃ . 6) is moved backward by one information unit in the VRMI information, that is, copied into the areas of VRMI_RECI # 5 to # 7, respectively, and the above-described information is recorded in the information area of VRMI_RECI # 4. A value of 10b is recorded in 2 bits of 'C_TT' in the 'REC_MODE' field of the VRMI recording information (VRMI_RECI # 4), which is a value indicating that the last recording is connected. Since there is no longer connected recording in the subsequent connected recording field (N_CH_REC), a value of -1 is recorded, and in the preceding connected recording field (P_CH_REC), the index of the VRMI recording information for the recording previously generated by the current recording operation is recorded. In the example of FIG. 6, record 2. In the fields other than the above-mentioned three fields (CTT, P_CH_REC, N_CH_REC), appropriate values, information, and the like are recorded in the same manner as those recorded for VRMI_RECI # 2. This is to enable the disc device that cannot interpret the connection information of the VRMI recording information according to the present invention to display and play back each individual title belonging to the connected chain as a separate title.

The microcomputer 30 records the navigation information in the memory 32, which is updated due to the addition / modification of the VRMI, to the navigation file of the disk 1 through the recording DSP unit 13 and user input. The recording operation is completely terminated by entering the standby mode confirming the bay.

In the above-described embodiment, the description has been made mainly on the operation of recording the item pre-set by the user, but the present invention is also applicable to the recording request of the user whose recording end time is unknown.

In this case, however, since the recording time is not known, the recording starts from the _first empty space 101 ₁ without comparing with the recordable time of the empty space 101 _{3 at the} last position. When the recording of the empty space of the is finished, VRMI recording information for recording the next empty space and then managing them as one title is generated as described above.

As described above, in a state in which an image, for example, broadcast program and recording information is recorded on the mounted disk 1, a user may use an ordinary input device such as an input device such as a remote controller. When the playback menu is selected, the microcomputer 30 controls the OSD unit 33 to configure and output a playback menu screen, for example, a list of recorded titles. When the microcomputer 30 constructs a title list, 'REC_ST' is 01b (not deleted) and 'REC_MODE' field is 00b in each VRMI_RECI in the VRMI loaded from the disk 1 to the memory 32. For each recording, one title is shown, and for each recording chain (interconnected recording set) whose 'REC_ST' is 01b and REC_MODE 'is not 00b, one title (playback item) is shown for that chain. Each title is represented by a string in REC_NM in VRMI_RECI.

If one recording title, for example, a title of the second VRMI recording information (VRMI_RECI # 2) is selected on the displayed title list, the microcomputer 30 performs the playback operation illustrated in FIG. 9. First, the microcomputer 30 moves the optical pickup 2 to a position of a logical block corresponding to a value obtained by adding 1 to the value of the 'REC_E_A' field in the immediately preceding VRMI recording information of the VRMI recording information for the selected title. The servo controller 24 is controlled and a read operation is performed at the corresponding position. The data stream of the recorded recording section is transmitted to the demux 22, and the demux 22 extracts the encoded A / V data from the input data stream and applies it to the A / V decoder 23. / V signal output. This allows the user to watch the recorded program.

On the other hand, when the reproduction of the current recording (Rec # 2) is completed during such a reproduction operation, the value of the 'C_TT' field in the VRMI recording information for the reproduced recording is checked (S901). If the value of the field is 01b, check the index value of 'N_CH_REC' to specify VRMI recording information for the next connected recording, and record in 'REC_E_A' in the previous information (VRMI_RECI # 3) of the information (VRMI_RECI # 4). The reproduction beam of the optical pickup 2 is jumped to a position corresponding to a value added by one (S902). If the value of the checked 'C_TT' field is not 01b, playback is terminated.

The microcomputer 30 resumes data reproduction from the jumped position. Then, when playback is completed to the end point of the recording (Rec # 4) (the point indicated by 'REC_E_A' in the VRMI_RECI of the recording), the VRMI recording information (VRMI_RECI #) of the recording (Rec # 4) as described above. Check the 'C_TT' field in 4) and if the value is not 01b, the playback operation is terminated (S903). If it is 01b, as described above, the next connected recording is found and played.

On the other hand, the value of the shear-linked recording field P_CH_REC in each VRMI recording information of the interconnected recordings is used during backward play or rewind. That is, in the example of FIG. 9, if backward playback or backward search is requested at any point of recording # 4, when the playback position becomes the leading point of the recording (Rec # 4), 'P_CH_REC' of VRMI_RECI # 4 Check the field value, specify the VRMI recording information (VRMI_RECI # 2) of the connected front end recording (Rec # 2), and start data playback in the reverse direction starting from the position indicated by 'REC_E_A' of the recording information. Will be performed. This reverse playback or searching proceeds only to the beginning of the recording corresponding to the VRMI recording information in which the value of 'P_CH_REC' is recorded with -1, unless a user inputs otherwise.

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 in various ways, modifications, substitutions or additions in the art. Anyone with knowledge of the world can easily understand it. 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 as a limited embodiment in the above, in the case of a recording medium in which recordings recorded at one time in succession are managed by one recording program (title), recording is carried out in distributed empty spaces of the recording medium. By allowing the user to recognize and play back the video content as one title, the empty space of the recording medium can be used to the maximum, thereby increasing the utilization of the recording medium.

Claims (17)

A method of recording an input video signal on a recording medium, If the video signal requested to be recorded cannot be recorded in the last empty space of the recording medium, the video signal requested to be recorded is recorded in at least two empty spaces distributed on the recording medium, and for each recorded section, A first step of generating recording section information on the recording medium; And generating and recording connection information for considering each generated recording section information as belonging to a single recording program. The method of claim 1, And the recording section information is information for causing the disk device to ignore the connection information to regard the recording section corresponding to the recording section information as a single recording program. delete delete The method of claim 1, Wherein the connection information comprises information indicating that any recording section information is connected to other recording section information, and information indicating the recording section information connected before and / or after. In the method for managing the video signal recorded on the recording medium, A step (1) of reading information of each recording section recorded on the recording medium to determine whether a plurality of recording sections distributed with each other constitute a single recording program; Including two steps, one playback item is provided for a plurality of distributed recording sections identified as constituting a single recording program, and one playback item is provided for each recording section that is not otherwise provided as a user selection screen. How it is done. The method of claim 6, In the step 1, when the connection information in each of the recording section information indicates that the information is connected to other recording section information, it is determined that the recording sections corresponding to the recording section information constitute a single recording program. How to. The method of claim 7, wherein And the recording section information is information for causing the disk device to ignore the connection information to regard the recording section corresponding to the recording section information as a single recording program. The method of claim 7, wherein And the connection information comprises information indicating that any record section information is connected to other record section information, and information indicating the record section information connected before and / or after. The method of claim 7, wherein If the playback item selected on the user selection screen is for a plurality of recording sections, further comprising three steps of sequentially playing the corresponding recording sections with reference to the connection information in each recording section information corresponding to the plurality of recording sections. Method made by the. The method of claim 10, In the third step, in the case of forward reproduction, when the reproduction for the current recording section is completed, the next recording section information is specified with reference to the connection information in the recording section information for the recording section, and recording corresponding to the specified recording section information is performed. And subsequently playing the section. The method of claim 10, In the case of reverse playback in step 3, when reverse playback of the current recording section is completed, the previous recording section information is specified by referring to the connection information in the recording section information for the recording section, and corresponding to the specified recording section information. And reproducing the recording section in reverse direction. 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 on the recording medium; And The recording unit is controlled to record the input video signal in at least two empty spaces distributed on the recording medium, and further, recording section information for each recorded section and a plurality of recorded sections in a single recording program. It includes a control unit for generating the connection information to be considered as being recorded on the recording medium, And the recording section information is information for causing the disk device to ignore the connection information to regard the recording section corresponding to the recording section information as a single recording program. delete An apparatus for reproducing a video signal recorded on a recording medium, A reproducing unit for reading a signal recorded on the recording medium; A menu configuration unit configured to output a menu screen according to the input data; And The reproducing unit is controlled to read each recording section information recorded on the recording medium to check whether a plurality of recording sections which are distributed to each other constitute a single recording program, and to determine that a single recording program is constituted. And a control unit for providing a user selection screen by providing data configured as one playback item for a plurality of recording sections and one playback item for each recording section, respectively, to the menu configuration unit. The method of claim 15, The control unit determines that the recording sections corresponding to the recording section information constitute a single recording program when the connection information in each of the recording section information indicates that the connection information is connected to the other recording section information. Device. The method of claim 16, And the recording section information is information for causing the disk device to ignore the connection information to regard the recording section corresponding to the recording section information as a single recording program.

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