KR100251460B1 - Dvd recorder and method for recording program in real time - Google Patents

Abstract

PURPOSE: A DVD(Digital Video Disc) recorder for inserting a real time program is provided to automatically insert a program in real time as generating data having an existing system, so as to make a fast searching possible. CONSTITUTION: An AV(Audio/Video) Codec(Coder-Decoder)(11) transceives input/output signals with an external device. A DSP(Digital Signal Processor)(12) transmits a signal between an RF amplifier(13) and the AV Codec(11), and performs a signal processing for inserting a program in real time. The RF amplifier(13) converts a signal to transmit a signal between the DSP(12) and a pickup unit(14). The pickup unit(14) inputs the signal of the RF amplifier(13) to write the inputted information in a recording medium, and reads the information from the recording medium to transmit the information to the RF amplifier(13). A system servo controller(15) connected to each unit stably controls a DVD(Digital Video Disc) recorder system and the pickup unit(14).

Description

Real-time program insertion DVD recorder and method

The present invention relates to a DVD recorder for inserting a program in real time and a method of inserting the same, and more particularly, to automatically insert a program in real time and to perform a fast search function, as well as to a conventional DVD player. The present invention relates to a DVD recorder designed to be possible and a method of inserting the same.

In general, DVD is an abbreviation of digital video disc and can be said to be a next-generation disc for ultra-high speed and large capacity information processing. DVD players using these discs offer a variety of features, including fast search and real-time program insertion. The fast search means searching for a desired scene at a high speed while watching a movie or a sports game. In order to perform the fast search function, important information must be inserted and displayed in an important scene. Conventional DVD players have re-edited movies, sports games and the like to display information for high-speed search of important scenes or running times.

However, the conventional DVD recorder as described above has to be edited in order to insert a program including information for fast searching in the middle of a video.

Accordingly, an object of the present invention is to provide a method and a DVD recorder for inserting a program in which information for fast search and the like is recorded in real time so as to solve the above problems.

1 is a block diagram of a real-time program insertion DVD (DVD) recorder according to the present invention.

2 is a block diagram of one connection program (ProGram Chain, PGC) used in the DVD of the present invention.

3 is a view showing in detail the contents of the serial program information (PGCI) of the connection program (PGC).

4A is a flow chart for automatically inserting a program in real time, in accordance with the present invention.

4B is a flow diagram of a unit-purpose video end of VOBU routine, in accordance with the present invention.

※ Explanation of code for main part of drawing

11: sound image conversion unit 12: digital signal processing unit

13: RF amplifier 14: pickup (PICK-UP)

15: servo unit 16: system control unit

31: Pre-Command

32: Program List

33: Post-Command

50: connection program information (PGCI)

501: PGC Genernal Information (PGC_GI)

502: PGC Command Table (PGC_CMDT)

503: PGC Program Map (PGC_PGMAP)

504: Cell PlayBack Information (C_PBIT)

505: Cell Position Information Table (C_POSIT)

According to the present invention for achieving this object,

Real-time program insertion DVD recorder generates data in a way that can be reproduced even on existing DVD players, and can automatically insert a program in real time to enable fast search function. It is equipped with various devices such as an audio image unit and a digital signal processing device that perform special control functions.

In addition, the real-time program insertion method,

Setting initial values for the variables and instructing to start recording external data, repeating program insertion in real time by a timer operation, recording related information after stopping and stopping program insertion by a timer stop, and The initial value is modified.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a real-time program insertion DVD recorder according to the present invention. As shown, the real-time program insertion DVD recorder

An audio image converting unit (11, AV Codec) for transmitting and receiving signals to and from an external device is provided. Acoustic image conversion unit 11 is connected to the digital signal processing unit (12, DSP) for transmitting a signal between the acoustic image conversion unit 11 and the RF amplifier 13, and performs a signal processing for real-time program insertion, After that, an RF amplifier 13 (RF AMP) for converting a signal of the digital signal processor 12 (DSP) and a signal of the pickup unit 14 is connected. At the next stage, a pickup section 14 (PICK-UP) for writing signals to the disk and reading the recorded signals is connected to the RF amplifier section. In addition, the system servo control unit 15, which is connected to each unit for stably controlling the entire DVD recorder system and the pickup unit 14, is provided.

The operation of the real-time program insertion DVD recorder according to the present invention configured as described above will be described in more detail with reference to the accompanying drawings. As shown in Fig. 1, the functions of the real-time program inserting DVD recorder can be broadly classified into two types: write and read.

First, referring to the writing process, the audio image converting unit 11 (AV Codec) receives an audio and video signal input from the outside, compresses the data using a DVD method, and outputs the data to the digital signal processing unit 12 or DSP. do. The digital signal processor 12 (DSP) adds additional data for error correction code (ECC) processing of the compressed data, and performs 8/16 modulation. 8/16 modulation converts the number of data bits to match the DVD recorder. The RF amplifier 13 (RF AMP) converts and outputs an electrical signal processed by the digital signal processor 12 (DSP) into an optical signal for recording on a disk. Thereafter, the pickup unit 14 and the PICK-UP receive the optical signal of the RF amplifier 13 and the RF AMP and record the same on a disk, and also perform focusing and tracking. The system servo controller 15 receives the necessary information from each unit and stably controls the overall DVD recorder system and the pickup unit 14.

Next, referring to the operation of the DVD recorder when reading, the pick-up unit 14 (PICK-UP) reads a signal from a disc storing data, and the RF amplifier unit 13 (RF AMP). To transmit. The RF amplifier 13 (RF AMP) converts the input optical signal into an electrical signal and outputs it to the digital signal processor 12 (DSP). The digital signal processor 12 (DSP) performs 8/16 demodulation from the electrical signal, and then performs an error correction code (ECC) process to remove the added data added during modulation for recording. The audio image converting unit 11 (AV Codec) converts the data of the compressed DVD system and outputs it to the outside. The operation of the system servo controller 15 is the same as in writing.

2 shows a configuration diagram of one connection program (ProGram Chain, PGC) used in a DVD. PGC (ProGram Chain) can be classified according to execution order and signal function.

First, in accordance with the execution order, one linked program (PGC) is a pre-command (31, Pre-Command) to be executed before program reproduction, a program set consisting of a plurality of cells (32, Program List) It is classified into three parts of the post command 33 executed after the program playback.

The connection program PGC is classified into connection program information 30a (ProGram Chain Information (PGCI)) and a target video signal 30b (Video OBject Set, VOBS) according to a function. The connection program information 30a (PGCI) has information on the PGC configuration, and the target video signals 30b and VOBS represent actual data of compressed audio and video.

3 shows in detail the contents of the linking program information (PGCI) of the linking program (PGC).

As shown, the connection program information 50 (PGCI) is largely classified into five parts, the five parts of which are PGC general information (501, PGC Genernal Information, hereinafter PGC_GI), PGC command table (502, PGC Command Table, PGC_CMDT), PGC program map 503 (PGC Program Map, PGC_PGMAP), Cell playback information (504, Cell PlayBack Information, C_PBIT), and Cell Position Information Table (505, Cell Position Information Table, C_POSIT). Each of these five parts is described in detail.

First, the PGC general information (501, PGC_GI) will be described. The PGC general information 501 and PGC_GI can be classified into six small parts. PGC_CNT indicates program information and number of cells, PGC_PB_TM indicates PGC playback time, and PGC_CMDT_SA / PGC_PGMAP_SA / C_PBIT_SA / C_POSIT_SA start address of various tables in PGCI. ).

Second, the PGC instruction table 502 (PGC_CMDT) is classified into six small parts. PGC Command Table Information (PGC_CMDTI) shows information about PGC Command Table. Pre-Commands / Post-Commands are commands to be executed before and after playing a program in PGC. Is the cell execution command.

Third, in the PGC program diagram 503 (PGC_PGMAP), the cell numbers registered in the respective programs are displayed for all the programs in the PGC.

Fourth, the cell reproduction information 504 (C_PBIT) stores five detailed information of all registered cells. Cell PlayBack Time represents the cell playback time, and the remaining four pieces of information are for indicating actual data belonging to the corresponding cell. C_FVOBU_SA is the starting address of the first VOBU of the cell, C_FILVU_EA is the last address of the first interleave unit of the cell, C_LVOBU_SA is the starting address of the last VOBU of the cell, and C_LVOBU_EA is the last VOBU of the cell. The last address of each is stored.

Finally, the cell position information table 505 (C_POSIT) has VOB ID and Cell ID information for each cell in the PGC.

FIG. 4A is a flowchart for automatically inserting a program in real time according to the present invention, and FIG. 4B is a flowchart of an VOBU end routine.

As described above, the connection program information (PGCI) of the DVD includes many kinds of information, but such information includes information that cannot be written in real time. Accordingly, the present invention takes the form of a unique linked program information (PGCI) called PGCI defect default. Its contents are to make one program into one cell so that the cell identification number and the program number are the same. Also, the PGC instruction is not generated. VOB), programs are played sequentially, and no interleave block is used.

Referring now to FIG. 4A, a method of inserting a program in real time will be described. When recording is started on the DVD recorder, a PGCI defect default value is input (step 701). This is because the PGCI is not known until the data is recorded, so the PGCI defaults are entered first as described above. In addition, since the PGCI must be recorded before recording the object video (VOB), which is pure data, the PGCI defects are entered first, and then updated according to the data contents recorded thereafter.

Next, some initialization input for program automatic insertion is performed (step 702). The initialization input is set to 1 for Program Number (PGN), 0 for Sector Address, 1 for VOBU_SA / VOBU_EA, and 0 for PBTM. The program number PGN represents the number of programs. The sector address is a value that is incremented by one each time the sector is increased in the process of constructing data in sector units in the digital signal processing unit 12 (see FIG. 1) and generating an ECC code.

VOBU_SA / VOBU_EA are values generated by the VOBU end routine as shown in FIG. 4B. The VOBU end routine is a routine that is performed when the audio image converting unit 11 (see FIG. 1) compresses external data to generate data in VOBU units. In this routine, VOBU_SA stores the VOBU_EA + 1 value, and VOBU_EA obtains and stores the current sector address value from the digital signal processor 12 (see FIG. 1). The PBTM stores the current PBTM plus the PlayBack Time corresponding to the new VOBU.

Next, the timer is set to operate using information on whether to insert a program at regular intervals from the user, PGCI defaults, etc. (step 703). Start recording (Record on Command) to record important programs in the middle of external data (step 704). The C_FVOBU_SA corresponding to the current PGN stores the VOBU_EA + 1 value, which is the first in the current program. It is the start address of VOBU (step 705).

Next, it is determined whether or not the set timer is operated (step 706).

If the timer is running, VOBU_SA is stored in C_LVOBU_SA of the current PGN and VOBU_EA in C_LVOBU_EA of the current PGN, thus ending information on the VOBU address for the current program. In addition, the PBTM is stored in the C_PBTM of the current PGN, and the PBTM is initialized to '0' and used to obtain a PlayBack Time of the next cell. (Step 707) After that, the PGN is continuously increased. Repeating steps 708 and 705 to 708, the timer is stopped if the PGN is greater than 99 (steps 709 and 710).

In this case, after performing steps 705 and 706, step 711 is automatically performed, and all remaining areas record one program. The reason for stopping the timer is because the DVD only supports a maximum of 99 programs in one PGC.

The operation of the set timer is determined (step 706). If the timer does not operate, it is determined whether to stop recording (step 711). If the recording stop is NO, the recording is continued, and the determination of whether the timer is operated is repeated (step 706).

If recording stop YES, the VOBU currently being recorded is recorded, and then recording is stopped by using a record off command (step 712). Next, the aforementioned VOBU_SA is stored in C_LVOBU_SA of the current PGN, the VOBU_EA described in C_LVOBU_EA of the current PGN, and the PBTM are stored in the C_PBTM of the current PGN (step 713). And based on the information input so far, by modifying the PGCI defect implementation (default) described above (step 714), the real-time program insertion according to the present invention is completed.

As described above, the present invention provides an improved technique for DVD by providing a real-time program inserting DVD recorder and a method of inserting the same, which can be effectively reproduced by using a function such as program search even in a conventional DVD player. There is an economic advantage.

Claims (10)

In DVD (DVD) recorder, An audio image conversion unit (AV Codec) for transmitting and receiving signals to and from an external device; A digital signal processor (DSP) for transmitting a signal between the RF amplifier and the audio image converter and performing signal processing for inserting a program in real time; An RF amplifier (RF AMP) for converting a signal for signal transmission between the digital signal processor and a pickup (PICK-UP); A pick-up unit (PICK-UP) which receives the signal of the RF amplifier and writes input information on a recording medium, reads information from the recording medium, and transfers the information to the RF amplifier; And, And a system servo controller for stably controlling the overall DVD recorder system and the pick-up unit connected to the respective units. The method of claim 1, wherein the audio image conversion unit A real-time program insertion DVD recorder, characterized by transmitting information on a coding unit to the system servo control unit while encoding external data. The method of claim 1, wherein the digital signal processing unit And classifying data inputted to insert a program in real time into a predetermined unit, and providing information about the data to the system servo control unit. In the recording process of a DVD recorder, (1) commanding initial value setting and start of external data recording for a plurality of variables; (2) repeating program insertion in real time by a timer operation; (3) stopping program insertion by stopping the timer and recording related information about the program after the interruption; And, And (4) modifying the predetermined initial value of the first step. The method of claim 4, wherein the initial value setting of the first step comprises: Connection program information, characterized in that the information on the defect implementation (PGCI default), real-time program insertion method. The method of claim 4, wherein the initial value setting of the first step comprises: Real-time program insertion method, characterized in that the information on the variables counted when the real-time program insertion. The method of claim 4, wherein the external data of the first step, A real-time program insertion method, characterized in that the target video signal (VOBS) for inserting a real-time program. The method of claim 4, wherein the second step, (1) setting an initial value of a program being inserted in real time; (2) setting a condition for repeating real-time program insertion; And, And (3) determining the real time program insertion repeat and the insertion stop according to the condition of the second step. The method of claim 8, wherein the condition for repetition of the insertion of the second step is A method of inserting a real-time program, characterized in that one connection program (PGC) is the number of programs in a specified range that is acceptable. The method of claim 4, wherein the third step, (1) completing writing of information on the last unit-purpose video VOBU in which recording is in progress when the real-time program insertion stops; And (2) recording information on a program last inserted in the first step.

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