KR20020071652A - Method for recording and reproducing a demo data, and medium thereof - Google Patents

Abstract

PURPOSE: A method of recording and reproducing demo data and a recording medium according to the method are provided to search and reproduce demo data without having a separate decoding code. CONSTITUTION: A recording medium includes a data recording area, and a management information recording area that stores management information required for reproducing the data recorded in the data recording area. One source data composed of encoded data and non-encoded data is recorded in the data recording area. Location information needed for searching the non-encoded data is recorded in the management information recording area. The location information includes non-encoded data recording start position information and recording completion position information. The non-encoded data is for demonstrating the contents of the encoded data.

Description

Method for recording and reproducing demo data, and recording medium according thereto {Method for recording and reproducing a demo data, and medium}

The present invention, a portion of the source data (Source Data) that is transmitted and received through an online communication network, such as the Internet (Internet), down-recorded (Download) in an encrypted state on a recording medium such as a DVD-RAM, The present invention relates to a method of recording and reproducing demo data for enabling searching and reproducing as demo data, and a recording medium accordingly.

Recently, DVD (Digital Versatile Disc), a high-capacity and high-density optical disc capable of recording and storing high-quality video data for a long time, has been developed and released. High-definition moving picture data can be recorded and stored, such as a DVD-ROM for reproduction only, a DVD-R recordable once, and a rewritable DVD-RAM or DVD-R / W.

For example, DVD-RAM, a rewritable recording medium, is a high-density optical disc that is currently undergoing specific standardization, and when a rewritable recording medium such as DVD-RAM is developed and released and is commonly used, a user may want his own video data. Of course, audio data can be recorded on a DVD-RAM for a long time.

Meanwhile, various types of digital data transmitted through an online communication network such as the Internet, for example, Electronic Music Distribution (EMD) audio data, may be used to prevent unauthorized copying and copyright protection. In other words, according to the EMD audio providers are encoded in the audio data of different unique formats, and a unique copy protection code, etc. are additionally recorded and transmitted through online.

Accordingly, in order to decode and listen to the original audio data by decoding the EMD audio data, a unique decoder provided from the EMD audio provider, that is, the EMD audio data encoded in the unique format, is restored to the original audio data. Since a decoder having a unique decoding algorithm capable of decoding and a unique decoding code capable of decoding the copy protection code is necessary, it is possible to fundamentally prevent unauthorized copying and copyright infringement of digital audio data. .

Accordingly, in recent years, various types of digital data, such as various audio songs, provided through an online communication network such as the Internet, have been recorded and produced in the form of encrypted EMD audio data which requires a separate decryption code. It is rapidly spreading through online communication networks such as the Internet.

However, since the copy protection code is additionally recorded in the digital data of various intrinsic formats, for example, the EMD audio data, which is transmitted and provided through the Internet or the like as described above, the user provided with the optical disc device can read Without the code, it is not possible to play and listen to the EMD audio data recorded downward on the DVD-RAM, etc., so as to confirm whether the EMD audio data recorded on the recording medium such as the DVD-RAM corresponds to the audio song of the desired contents. It becomes impossible to passively cope with the purchase of a payout of a decryption code capable of decrypting and playing the EMD audio data, which is spreading digital data such as EMD audio data provided through an online communication network such as the Internet. There was a problem that greatly limits the.

Accordingly, the present invention has been made to solve the above problems, wherein the data encrypted by the additional recording of the copy protection code and the non-encrypted demo data for identifying the contents of the encrypted data have temporal continuity. Down-record the transferred source data into a recording format suitable for a recording medium such as a DVD-RAM, and generate and record management information for searching and reproducing the demo data. It is an object of the present invention to provide a method of recording and reproducing demo data, and a recording medium according to the same, which can search and reproduce the demo data without code.

1 shows a configuration of an optical disk apparatus to which the method for recording demonstration data according to the present invention is applied.

2 shows demo data search management information generated and recorded by the method for recording demo data according to the present invention;

3 illustrates an audio recording assembly (AOB) in which data for demonstration is included and demodulation data search management information.

4 illustrates demo data search management information generated and recorded by a method for recording demo data according to another embodiment of the present invention.

FIG. 5 illustrates an audio recording assembly (AOB) including data for demo data and demo data search management information according to another embodiment of the present invention.

6 shows audio management information (AMGI) generated and recorded by the method for recording demo data according to the present invention.

FIG. 7 shows cell general information C_GI generated and recorded by the method for recording demo data according to the present invention;

Fig. 8 shows audio recording collective general information AOB_GI generated and recorded by the method for recording demo data according to the present invention.

※ Explanation of code for main part of drawing

1: DVD-RAM 2: Optical pickup (P / U)

3: recording processing unit 4: signal processing unit

5 control unit 6 buffer unit

7: converter

In order to achieve the above object, a recording medium having recorded therein demo data according to the present invention comprises a recording area of data and a management information recording area in which management information necessary for data reproduction is recorded. In the recording area, one source data composed of encrypted data and unencrypted data is recorded, and the management information recording area is recorded with location information for searching for the unencrypted data.

In addition, the method for recording demo data according to the present invention comprises the steps of: receiving one source data consisting of encrypted data and unencrypted data, and recording them in a data recording area of a rewritable recording medium; And generating location information for searching a recording section of the non-encrypted data, and recording in the management information recording area of the re-recording medium.

In addition, the method for reproducing demo data according to the present invention comprises: a step (1) of confirming whether decryption information for decryption of encrypted and recorded data exists in a management information recording area of a recording medium when a request for reproducing of recorded data is requested; Reading the location information of the non-encrypted data section of the corresponding record data when there is no decryption information as a result of the checking; And selecting and reproducing only the non-encrypted recording section from the recorded data requested for reproduction by using the read position information.

Hereinafter, a method of recording and reproducing demo data according to the present invention and a preferred embodiment of the recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 shows a partial configuration of an optical disc device such as a DVD-Audio recorder (DVD-AR) to which the method for recording demo data according to the present invention is applied. An input signal processor 4 for receiving and inputting digital data, for example, an EMD audio file, which is transmitted and transmitted through a personal computer (PC) or a modem connected to the same online communication network; A buffer unit 6 for temporarily storing the input and received EMD audio file; A converter (7), optionally provided by an EMD audio provider, for converting the EMD audio file into a recording method suitable for a DVD format; The EDM audio file is signal-processed so as to be suitable for recording, and after converting and encoding the temporarily stored EMD audio file into a DVD-AR format using the converter, the EMD audio file is used. And a recording signal processing unit 3 for selectively processing parallel recording signals together; An optical pickup (2) for recording a signal output from the recording signal processor to a recording medium (1) such as a DVD; And controlling the operation of the constituent means according to whether or not the converter 7 is provided and a decryption code for decrypting a copy protection code recorded in the EMD audio file. And a control unit 5 for interpreting the header information included in the D audio file and generating and recording management information on the EMD audio file recorded in the recording medium or the audio file in the DVD format. The decryption code may be transmitted in the header information of the EMD audio file or transmitted separately from the EMD audio file.

On the other hand, in the audio data transmitted as the EMS audio file, the data encrypted by additional recording of a copy protection code and the non-encrypted demo data for identifying the contents of the encrypted data have a temporal continuity. In the case where the encrypted data and the non-encrypted demo data are continuously transmitted and received as described above, the control unit 5 includes a format included in the header information of the EMD audio file. Search and verify the information, especially the recording format of the unencrypted demo data.

For example, when the recording format of the demo data is an MP3 audio format and the audio format that can be reproduced by the optical disc device is an LPCM audio format, the control unit 5 includes the transmission information included in the header information of the EMD audio file. The converted format information is used to convert and record the demo data of the MP3 audio format into the LPCM audio format, and generate and record the search management information for searching and reproducing the demo data.

That is, as shown in FIG. 2, recording start position information (EP_DA_S_PTM) and recording end position information (EP_DA_E_PTM) of demo audio data are generated as search management information for searching and reproducing the demo data. Recording is performed in cell information included in the program chain information (PGCI), in particular, audio entry point information A_C_EPI in the audio cell information.

The audio entry point information may include entry point type information (EP_TY) indicating whether recording start position information and recording end position information of the demo audio data are recorded. For example, the audio entry point information may be recorded. When recording start position information and recording end position information of the demo audio data are recorded in the entry point information, a value of '0001XXXX' (X is any value) is recorded in the entry point type information as a bit value. When only positional information capable of random access is recorded in the audio entry point information, a value of '0110XXXX' is recorded in the entry point type information.

As described above, the search management information recorded and managed in the audio entry point information is recorded in the demo data included in the audio record assembly (AOB) corresponding to one audio song, as shown in FIG. Recording is managed as positional information specifying a position.

On the other hand, as another embodiment, the search management information for searching for the demo data may include recording start position information (EP_DA_S_PTM) of the demo audio data and a recording section of the demo audio data, as shown in FIG. Each of the information is generated as information DA_DUR, and can be recorded and managed in audio entry point information of audio cell information included in the program chain information. The audio entry point information includes recording start position information and recording data for the demonstration. Entry point type information (EP_TY) indicating whether the section information is recorded may be recorded. In this case, the search management information recorded in the audio entry point information is recorded in one audio tune. Record as positional information specifying the recording position of the demo data included in the corresponding audio recording assembly AOB. Managed.

In addition, when the decryption code is received from the outside in the state where the converter 7 is provided in the optical disk device, an emdy audio file and audio data in a DVD format may be simultaneously recorded on the recording medium. In this case, the audio management information (AMGI: Audio Manager Information), which is navigation data for controlling playback, is proposed in DVD-AR format. Management information, for example, as shown in FIG. 6, real time audio management information (RTR_AMGI), audio file information table (AUDFIT); Audio Still Video File Information Table (ASVFIT), Original Program Chain Information (ORG_PGCI), User Defined Program Chain Information Table (UD_PGCT), Text Data Management Information (TXTDT_MG: Text Data Manager) and Manufacture's Information Table (MNNFIT) are included. In addition, an EMD File Information Table (EMDFIT) for managing the EMD audio file is additionally included. It can be configured to include.

Therefore, an EMS file information table EMDFIT is generated and recorded for controlling playback of an EMS audio file recorded on the recording medium 1 such as the DVD RAM, and the audio of the DVD format together with the EMS audio file is recorded. When data is recorded in parallel, an audio file information table (AUDFIT) for controlling reproduction of audio data of the DVD format is generated and recorded.

In addition, when the EMS file information table EMDFIT and the audio file information table AUDFIT are both generated and recorded through the above process, the audio file information table includes a pointer for indicating the EMS file information table. Pointer) information is included and recorded so that the EMS file information table EMDFIT and the audio file information table AUDFIT are mutually associated with each other.

That is, as shown in Figs. 7 and 8, the cell general information (C_GI) and the audio object general information (AOB_GI: Audio Object General Information) for controlling reproduction of audio data recorded in the DVD format are controlled. An audio record set information search pointer number (AOBI_SRPN) and audio still video unit information recorded in the cell general information and the audio record set general information by additionally recording an EMD Search Pointer Number (EMD_SRPN), respectively. The EDM audio file recorded on the recording medium such as the DVD RAM may be searched by the search pointer number (ASVUI_SRPN) and the audio recording assemblies (AOB) so as to be associated with the EMD audio search pointer number. Playback control alternately or selectively with the audio files of the The audio data recorded on the rewritable recording medium is divided into one 'logical track' unit. The logical track is separated from the physical track spirally formed on the recording medium and provided through a microphone or a broadcast. When one audio track is recorded by one recording, one logical track is recorded.

Then, all audio songs recorded on the rewritable recording medium, that is, all logical tracks are partitioned into one track set, and a new logical track is additionally recorded or a part of the logical track in the track set. Can be deleted. In addition, only a part of a logical track can be designated as a part track (PoT) by a user's editing operation, and only a part of the logical track can be played. A playlist (PL: Play) for specifying a play order of the logical track can be played. List).

In addition, after the above-described recording or editing of the logical track, the above-mentioned cell information is generated as information for referring to all or part of the logical track, and the cell information refers to one or more programs. It belongs to the chain information (PGCI). The playlist then refers to the appropriate program chain information by the program chain number at the user's selection. When the playlist selects any one of a plurality of playback leases designated by the user or automatically generated at the time of recording, the optical disc The controller in the long form searches for program chain information corresponding to the selected play list, and performs search and play operations on all or some sections of logical tracks designated by cells in the program chain information.

On the other hand, in the audio recording collective general information AOB_GI, decryption information capable of decrypting the EMD audio data encrypted by additional recording of a copy protection code, for example, 8 bytes provided for a fee through the Internet. By recording and managing an EMD Decryption Code (EMD_D_CODE), the encrypted EMD audio data can be decrypted and reproduced and reproduced as original audio data. As described above, the decryption code provided to be transmitted in the unit of the audio recording set corresponding to the audio song is recorded and stored in the general information (AOB_GI) of the audio recording set, and when it is requested to play, the readout code is read out to decode the encrypted MD data. The reproduction operation described above will be described in detail as follows.

First, the control unit 5, when a recording request key (Key) is received from a user in a state in which a recording medium 1, such as a DVD, is inserted into an optical disk device, the audio recording assembly general information (AOB_GI). The decryption code (EMD_D_CODE) recorded in the < Desc / Clms Page number 8 > In this case, a series of playback operations are performed. In this case, as described above with reference to FIGS. 2 to 5, search management information of the demo audio data recorded in the audio recording assembly, that is, the encryption is recorded. Navigation management information recorded in the audio cell information corresponding to the < RTI ID = 0.0 > To each of the read, the non-encrypted in the recording data for recording the demo, thereby reproducing the read without any decryption process.

Therefore, the encrypted MD audio data partitioned and recorded in the audio recording assembly AOB corresponding to one audio song is reproduced and output as original audio data through a decryption process, and the non-encrypted partitioned recording in the audio recording assembly is performed. The demo data is reproduced and output as original audio data without a separate decoding process.

On the other hand, if the decoding code (EMD_D_CODE) is not recorded in the audio recording assembly general information (AOB_GI) and is not retrieved, the search recorded in the audio cell information corresponding to the audio recording assembly (AOB) is recorded. The management information, for example, the recording start position information and the recording end position information of the demonstration data are read out, and only the demonstration data recorded unencrypted at the corresponding recording position is read out and reproduced without a separate decoding process.

Accordingly, even when the decryption code is not recorded, the user can confirm the contents of the EMD audio data encrypted and recorded on a recording medium such as a DVD-RAM, by reproducing the demo data. Through an online communication network such as the Internet, it is possible to decide whether to purchase decryption code that is provided for a fee.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The recording and reproducing method of the demo data according to the present invention and the recording medium according to the present invention are performed as described above for the data encrypted by additional recording of the copy protection code and the contents of the encrypted data. The location for searching for the demo data, as well as downloading the source data in which the encrypted demo data is transmitted with temporal continuity to a recording format suitable for a recording medium such as a DVD-RAM. By generating and recording the information so that the demo data can be searched and reproduced without a separate decryption code, a user equipped with an optical disc device can encrypt and down-record the data recorded on a recording medium such as a DVD. It is possible to confirm whether or not the data is in advance without decryption code, so that the solution for decryption reproduction of the It is a very useful invention that can naturally lead to the purchase of a dock code and also enable the spread of digital data such as EMD audio data, which is encrypted and provided through an online communication network such as the Internet. .

Claims (13)

The recording area of the data, And a management information recording area in which management information necessary for reproducing the data is recorded. In the data recording area, one source data consisting of encrypted data and unencrypted data is recorded, And the location information for searching for the unencrypted data is recorded in the management information recording area. The method of claim 1, And the position information includes recording start position information and recording end position information of the non-encrypted data. The method of claim 1, And the position information comprises recording start position information and recording section information of the unencrypted data. The method of claim 1, And the non-encrypted data is data for demonstrating the contents of the encrypted data. Receiving a source data consisting of encrypted data and unencrypted data and recording the same in a data recording area of a rewritable recording medium; And And generating two pieces of position information for searching the recording section of the non-encrypted data and recording it in a management information recording area of the re-recording medium. The method of claim 5, The first step may further include decrypting the encrypted data when the decryption information for decrypting the encrypted data is received and recording the encrypted data in a data recording area of the rewritable recording medium. A method of recording demo data. The method of claim 6, And the decryption information is recorded in the general management information of the recording aggregate unit generated by one recording. The method of claim 5, And identification information indicating that position information on the recording section of the non-encrypted data is recorded. The method of claim 8, The identification information is information for discriminating whether the demonstration data for demonstrating the contents of the encrypted data is a section in which the demo data is recorded, or whether the location information that can be arbitrarily accessed is recorded. Way. The method of claim 5, And converting the non-encrypted data into the specific recording format when the recording format of the non-encrypted data is not a specific recording format previously designated by the device. How to record. The method of claim 8, And recording the conversion into the specific recording format is selectively performed based on the data format information received in association with the source data. A first step of confirming that decryption information for decrypting the encrypted and recorded data is present in the management information recording area of the recording medium upon request for reproduction of the recorded data; Reading the location information of the non-encrypted data section of the corresponding record data when there is no decryption information as a result of the checking; And And reproducing only the non-encrypted recording section from the corresponding record data requested for reproduction by using the read position information. The method of claim 12, And said step 2 reads out location information on an unencrypted recording section from entry point information in cell information referring to said recording data.