KR20040076560A - Method for reproducing contents information in interactive optical disc player - Google Patents

Abstract

PURPOSE: A method for reproducing contents information in an interactive optical disk device is provided to re-synchronize contents audio data identical with a calculated offset value with video data when a synchronization failure occurs, and to output the re-synchronized data, so that a user can normally watch various contents audio data. CONSTITUTION: An initial Internet connection access to a contents providing server is performed(S10). The contents providing server performs corresponding functions(S11). An IDVD(Interactive DVD) player transmits a generated command to the server(S12). The server retrieves a requested contents audio data file, and transmits the retrieved file as ENAV(Enhanced Navigation) contents information(S13). When a network access loss occurs, the server stops transmitting the ENAV contents information(S14). The player multiplies bit rates of contents audio data, and calculates an offset value of re-synchronizable contents audio data(S15). The player generates a command for requesting ENAV contents information identical with the offset value to be transmitted, and transmits the command(S16). The server reads/transmits the contents audio data identical with the offset value(S17).

Description

Method for reproducing contents information in interactive optical disc player

The present invention relates to a method for reproducing content information in an interactive optical disc apparatus for synchronizing and reproducing and outputting various content audio data having an association with video data read out from an optical disc such as an interactive digital versatile disc (IDVD). will be.

In general, a high density optical disc capable of recording and storing a large amount of digital data, for example, a DVD, is widely used. The DVD has a large capacity capable of recording and storing not only digital audio data but also high definition video data for a long time. It is commercially available as a recording medium.

The DVD may include a navigation data recording area in which navigation data necessary for controlling playback of the moving picture data is recorded and a data stream recording area in which a digital data stream such as the moving picture data is recorded and stored. .

Therefore, in the general DVD player, when the DVD is inserted and seated in the device, the navigation data recorded in the navigation data recording area is read out, stored in a memory in the device, and then the data stream is used using the navigation data. A DVD playback operation of reading and playing back moving picture data recorded in the recording area is performed.

Accordingly, the user having the DVD player can not only play and watch the high quality video data recorded on the DVD for a long time, but also can use various functions provided by the DVD.

Meanwhile, in recent years, detailed information related to A / V data read and reproduced from the DVD may be displayed in a Mark-Up Language (XHTML or SMIL), or a Cascading Style Sheet (CSS). , Document types such as Scripting Language ('ECMAScript'), Image ('JPEG' or 'PNG'), Audio ('AC-3', 'MPEG audio', 'DTS') , 'SDDS'), Animation ('MNG') Text / Font, etc.A variety of data types such as additional content on the DVD and recorded on the interactive DVD (Read and playback through the user interface) IDVD) is being discussed among related companies. When such interactive DVD is commercialized, various types of content information related to the main A / V data will be easily searched by a user. It is expected.

In addition, while playing the main A / V data recorded on the interactive DVD (DVD), the other various types of contents listed above are provided from a content providing server connected through the Internet, and then synchronized and reproduced. Measures to enable this are discussed.

However, due to loss of network connection or storage capacity of the buffer memory included in the interactive optical disk device, etc., if the transmission of content information is temporarily interrupted or delayed, an efficient solution for resynchronization has not yet been provided. If the A / V data and content information read out from the interactive DVD are not synchronized with each other, an efficient solution for resynchronization has not yet been prepared.

Accordingly, the present invention has been made in view of the above situation, and the content audio data having an association with video data read out from an optical disc such as an interactive DVD (IDVD) is synchronized with the video data during playback. If a failure occurs, after calculating the offset value of the resynchronizable content audio data, the content audio data corresponding to the offset value is received from the content providing server or searched and read from the optical disc, SUMMARY OF THE INVENTION An object of the present invention is to provide a method of reproducing content information in an interactive optical disc apparatus for reproducing and outputting in synchronization.

1 illustrates a configuration of an interactive optical disk apparatus to which the present invention is applied.

2 conceptually illustrates a data reproduction state in an interactive optical disc apparatus to which the present invention is applied;

3 and 4 illustrate a data transmission / reception process and a data reproduction process between the interactive optical disc apparatus and the content providing server according to the first embodiment of the present invention.

5 shows a data reproduction process in the interactive optical disc apparatus according to the second embodiment of the present invention,

6 shows a data reproduction process in the interactive optical disc apparatus according to the third embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: network manager 11: ENAV buffer

12: document processing unit 13: element decoder

14: ENAV interface handler 15: AV renderer

100: ENAV engine 200: DVD-Video playback engine

300: CP server 400: optical disk

Content information playback method in the interactive optical disk device according to the present invention for achieving the above object, the video data read from the interactive optical disk, and the content audio transmitted and downloaded from the content providing server connected and connected through the Internet Step 1 of synchronizing and playing data; Calculating an offset value of resynchronizable content audio data based on a reproduction time of video data read and reproduced from the interactive optical disc and a bit rate of the content audio data when a transmission break or delay of the content audio data occurs. step; And transmitting a command for requesting transmission of content audio data corresponding to the calculated offset value to the content providing server, and then retransmitting content audio data corresponding to the command from the interactive optical disc. It characterized in that it comprises a three steps of re-synchronizing the video data and playback,

In addition, the method for reproducing content information in the interactive optical disc apparatus according to the present invention comprises the steps of: synchronizing and reproducing video data and content audio data separately recorded on the interactive optical disc; Calculating an offset value of resynchronizable content audio data based on a reproduction time of the video data and a bit rate of the content audio data when the synchronization fails; And searching for the content audio data corresponding to the calculated offset value, resynchronizing with the video data read from the interactive optical disc, and reproducing and outputting the same.

In addition, the method for reproducing content information in the interactive optical disc apparatus according to the present invention comprises the steps of: searching and referring to additional information recorded in the content audio data stream read from the interactive optical disc or transmitted from the content providing server; Calculating an offset value for resynchronization between the content audio data and video data read out from the interactive optical disc based on the additional information; And three steps of searching for and reading content audio data corresponding to the offset value from the interactive optical disc, or receiving a request through an interface with the content providing server, resynchronizing with the video data, and outputting. Characterized in that made.

Hereinafter, a preferred embodiment of a method of reproducing content information in an interactive optical disc apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates a configuration of an interactive optical disc apparatus to which the present invention is applied. The interactive optical disc apparatus, for example, the interactive DVD player 100, is connected to a content providing server 300 through a network. Network manager 10 for downloading ENAV contents from the network, ENAV buffer 11 preloaded with the ENAV contents recorded on the optical disk 400 such as IDVD, and ENAV document to receive the corresponding data processing operations. The document processing unit 12 for performing, the element decoder 13 for decoding text data and element data such as audio, images, fonts, animations, etc. into video and audio, the ENAV buffer, and the document processing unit To perform the corresponding operation, user trigger, DVD trigger, DVD status, DVD control scene. Is received, and to send the ENAV interface handler 14 and, AV renderer 15, comprising configuring ENAV engine 100 comprises a that is for outputting the audio and video configurations,

In addition, the DVD-Video reproducing engine 200 which is operated in association with the ENAV engine is configured to be included, and the content providing server 300 is connected to the network manager 10 of the ENAV engine to be connected with various content information, for example, And various ENAV (Enhanced Navigation) content data, such as an audio data file associated with video data read out from the interactive DVD 400.

Meanwhile, the ENAV buffer may be logically divided into a first buffer Buffer 1 and a second buffer Buffer 2, and as shown in FIG. 2, the main A read from the interactive DVD 400. The / V stream is reproduced and output together with ENAV content information, for example, content audio data, or synchronized with another content audio data provided from the content providing server 300.

Accordingly, a user having the interactive DVD player may use the A / V stream and / or ENAV content audio data read from the interactive DVD 400 and the ENAV content audio provided from the content providing server 300. You can watch the data together.

On the other hand, if the content audio data provided from the content providing server 300 is temporarily interrupted or delayed due to loss of network connection on the Internet or storage capacity of the buffer memory included in the interactive DVD player, the ENAV The engine 100 performs a series of operations for re-synchronizing the video data read from the interactive DVD 400 and the content audio data provided from the content providing server 300. .

In addition, when a synchronization failure occurs while synchronizing and outputting video data and content audio data read from the interactive DVD 400, a series of operations for resynchronization are performed, which will be described in detail. Is as follows.

3 and 4 illustrate a data transmission / reception process and a data reproduction process between the interactive optical disc apparatus and the content providing server according to the first embodiment of the present invention. For example, in the interactive DVD player, As described above, during the reading and playing of the video data of the interactive DVD embedded in the device, an initial internet connection connection operation with the content providing server is performed according to a user's request or an event generated by a script (Script). S10), the content providing server performs a series of operations corresponding thereto (S11).

Subsequently, the interactive DVD player generates a command requesting to transmit ENAV content information corresponding to the video data currently being played, for example, a content audio data file having an association with the video data currently being played, thereby providing the content. It is transmitted to the server (S12).

In addition, the content providing server performs a series of operations of searching for a content audio data file to be transmitted as described above in a database (not shown) and transmitting it as ENAV content information (S13). In the player, the content audio data provided as the ENAV content information is downloaded and temporarily stored in the ENAV buffer described above with reference to FIG. 1, and then reproduced and outputted in synchronization with the video data read out from the interactive DVD. .

In the meantime, the content providing server prepares an error process for a network connection loss situation such as connection failure or timeout of clients on the Internet, and waits for connection to clients. At this time, if the connection loss occurs on the network, the transmission of the ENAV content information is stopped (S14).

In the interactive DVD player, if the synchronization between the video data and the content audio data fails due to the suspension of transmission of ENAV content information, the video data playback time (Play Time = T1) is checked at that time. In addition, the sum of the playback time of the checked video data and a predetermined time A, which is set in advance, is then multiplied by the bit rate of the content audio data to calculate an offset value of the resynchronizable content audio data. Since the bit rate of the content audio data has a fixed bit rate (CBR), the offset value is simply calculated as 'Offset = (T1 + A) × CBR'. Can be.

The predetermined time A may be set to an arbitrary time value proportional to a playback speed of video data, a data transfer rate on the Internet, and the like. In operation S16, a command is generated to request transmission of the ENAV content information corresponding to the offset value calculated as described above, and is transmitted to the content providing server 300.

The content providing server performs a series of operations of reading and transmitting content audio data corresponding to the offset value with reference to the command received through the above process (S17). In the above process, the content audio data received again through the above process is resynchronized with the video data read out from the interactive DVD to reproduce and output normally.

Accordingly, as shown in FIG. 4, the interactive DVD player performs a normal playback operation of reading and playing back the main A / V stream read from the interactive DVD, and then from the content providing server. The content audio data to be transmitted is reproduced and output in synchronization with the video data of the main A / V stream.

In addition, even when the above synchronous reproducing operation fails, a series of operations of receiving resynchronizable content audio data from the content providing server again and resynchronizing with the video data can be performed. .

On the other hand, as a second embodiment according to the present invention, the interactive DVD player requests a user while performing a normal playback operation of reading and playing a main A / V stream recorded on an interactive DVD embedded in a device. Or ENAV, which is pre-downloaded and temporarily stored in the buffer of the interactive DVD system in advance in response to an event generated by a script. A series of synchronous playback operations are performed in which content audio data is reproduced in synchronization with the main A / V stream, for example, video data.

When the synchronization fails due to the capacity of the buffer memory or the like during the above-described synchronous playback operation, the interactive DVD player, as described above, plays the video data playback time (Play Time = T1), and after adding the playback time of the checked video data and the predetermined predetermined time A, multiplying the bit rate of the content audio data, and then offsetting the resynchronizable content audio data. Will yield

On the other hand, since the bit rate of the content audio data has a fixed bit rate (CBR), the offset value can be simply calculated as 'Offset = (T1 + A) x CBR', where the predetermined The time A may be set to any time value proportional to the playback speed of the video data.

In the interactive DVD player, content audio data corresponding to the offset value calculated as described above is searched and read from the interactive DVD, and then resynchronized with the video data to reproduce and output normally.

On the other hand, as a third embodiment according to the present invention, in the content audio data stream transmitted or received from the content providing server or read out from the interactive DVD, as described above with reference to Figs. / V stream, for example video data, and additional information for resynchronization between the content audio data can be recorded.

For example, as illustrated in FIG. 6, an offset value for resynchronization with video data can be calculated more quickly and accurately in one or more header areas of the head section of the content audio data stream. In order to ensure that the number of bytes of audio data per second (Number of Bytes / Sec), the number of bytes of audio data per frame (Number of Bytes / Frame), and the total byte size of the content audio data, Any one or more may be recorded including.

In addition, the additional information may be recorded in the header area and / or payload of the leading section of the content audio data stream or intermittently included in the entire section of the content audio data stream. .

In the interactive DVD player, for example, when the content audio data stream received from the content providing server is initially reproduced or the content audio data stream recorded on the interactive DVD is initially reproduced, for example, the content audio may be used. The number of bytes of audio data per second recorded in the header area, the number of bytes of audio data per frame, and the total byte size of the content audio data is searched for in the head section of the data stream.

Meanwhile, when a synchronization failure occurs while synchronizing and playing the content audio data and video data read out from the interactive DVD, an offset value for resynchronization is calculated by referring to the additional information. For example, the number of bytes of audio data per second is' 1 KB / Sec ', the number of bytes of audio data per frame is' 9 KB / Frame', and when the audio synchronization fails, resynchronization is required at '100 seconds ( 100 sec) ', the offset value calculated for resynchronization is' 100 seconds x 1 KB / sec = 100 KB'.

However, since the audio data is reproduced in units of frames and the number of bytes per frame is 9 KB, the start position of the audio frame including the offset value of 100 KB calculated as described above is '99 KB '. Therefore, in this case, from '99 KB ', a command for requesting transmission of the content audio data is generated and transmitted to the content providing server.

In the meantime, the content providing server performs a series of operations of searching for and reading a frame start position of the content audio data corresponding to the offset value with reference to the command received through the above process. In the type DVD player, the content audio data received again through the above process is resynchronized with the video data read out from the interactive DVD to reproduce and output normally.

In addition, when a synchronization failure occurs while the content audio data is read out and reproduced from the interactive DVD, the interactive DVD player sets the frame start position of the content audio data corresponding to the offset value calculated as described above. After searching and reading from the DVD, the video data is resynchronized with the video data to reproduce and output normally.

On the other hand, when the frame start position of the offset value calculated as described above exceeds the total byte size of the content audio data, the interactive DVD player determines that the offset value is calculated incorrectly, and performs the offset value calculation operation. After re-performing or determining that the resynchronization operation is impossible, a series of operations corresponding to the resynchronization operation, for example, a guide message for guiding a resynchronization failure, etc. are displayed.

In addition, the present invention is not only caused by synchronization failure due to external factors, but also when a user interactively disconnects audio data by forcibly selecting the Trick Play function from the interactive DVD that was normally played by the user. The offset value is calculated as described above, and the start point of the trick play is resynchronized, and the frame start position of the content audio data corresponding to the offset value is resynchronized with the video data for normal playback and output. have.

The above-described preferred embodiments of the present invention are disclosed for purposes of illustration, and can be applied to rewritable DVDs (DVD-RW, DVD-RAM) or various information recording media in addition to interactive DVDs. Within the spirit and scope of the present invention disclosed in the appended claims, various other embodiments may be improved, changed, replaced or added.

According to the present invention, a method of reproducing content information in an interactive optical disc apparatus according to the present invention synchronizes various content audio data having a correlation with video data read from an optical disc such as an interactive DVD (IDVD) and synchronized with the video data. If a synchronization failure occurs during playback, after calculating the offset value of the resynchronizable content audio data, content audio data corresponding to the offset value is received from the content providing server or searched and read from the optical disc. By reproducing and outputting in synchronization with the video data, it is a very useful invention that a user having an interactive optical disc device can normally view and check a variety of content audio data.

Claims (14)

A first step of synchronizing and reproducing the video data read out from the interactive optical disc and the content audio data transmitted and downloaded from the content providing server connected and connected through the Internet; Calculating an offset value of resynchronizable content audio data based on a reproduction time of video data read and reproduced from the interactive optical disc and a bit rate of the content audio data when a transmission break or delay of the content audio data occurs. step; And After the command for transmitting the content audio data corresponding to the calculated offset value is transmitted to the content providing server, the content audio data retransmitted corresponding to the command is read from the interactive optical disc. And reproducing and outputting data in synchronization with data. The method of claim 1, The bit rate of the content audio data has a fixed bit rate value. The method of claim 1, The offset value of the resynchronizable content audio data is calculated as an offset value of a result obtained by multiplying a reproduction time of the video data by a predetermined time and a bit rate of the content audio data. A content information playback method in an interactive optical disk device. The method of claim 1, The offset value of the resynchronizable content audio data is calculated as an offset value of a value obtained by multiplying the reproduction time of the video data by a predetermined time and a bit rate of the content audio data. And a time proportional to a reproduction speed of the video data and a data transfer rate on the Internet. A first step of synchronizing and playing the video data and the content audio data recorded separately on the interactive optical disc; Calculating an offset value of resynchronizable content audio data based on a reproduction time of the video data and a bit rate of the content audio data when the synchronization fails; And Content information in the interactive optical disc apparatus, comprising: searching for the content audio data corresponding to the calculated offset value, resynchronizing and reproducing the video data read from the interactive optical disc; How to play. The method of claim 5, The bit rate of the content audio data has a fixed bit rate value. The method of claim 5, The offset value of the resynchronizable content audio data is calculated as an offset value of a result obtained by multiplying a reproduction time of the video data by a predetermined time and a bit rate of the content audio data. A content information playback method in an interactive optical disk device. The method of claim 5, The offset value of the resynchronizable content audio data is calculated as an offset value of a value obtained by multiplying the reproduction time of the video data by a predetermined time and a bit rate of the content audio data. And content information reproducing method of an interactive optical disc device, characterized in that the time is set in proportion to the reproduction speed of the video data. Searching and referring to additional information recorded in the content audio data stream read from the interactive optical disc or transmitted from the content providing server; Calculating an offset value for resynchronization between the content audio data and video data read out from the interactive optical disc based on the additional information; And And searching and reading the content audio data corresponding to the offset value from the interactive optical disc or receiving a request through an interface with the content providing server, resynchronizing with the video data, and outputting the reproduced output. Content information playback method in an interactive optical disk device, characterized in that. The method of claim 9, And the additional information is at least one of the number of bytes of audio data per second, the number of bytes of audio data per frame, and the total byte size information of the content audio data. The method of claim 9, And the additional information is recorded and included in a header area or a pay load in a head section of the content audio data stream. The method of claim 9, And the additional information is intermittently included and recorded in a header area or a pay load among all sections of the content audio data stream. The method of claim 10, In the second step, the offset value of the content audio frame for resynchronization with the video data read from the interactive optical disc is calculated by referring to the number of bytes of audio data per second and the number of bytes of audio data per frame. Content information playback method in an interactive optical disk device. The method of claim 13, And when the calculated offset value of the content audio frame exceeds the total byte size of the content audio data, determining that the offset value is a calculation error or a resynchronization failure. A method of reproducing content information in an optical disc device.