KR100630061B1 - Data type identification information registration and reproduction method for distinguishing a plurality of service data - Google Patents

Abstract

The present invention provides a method of registering and reproducing data type identification information for distinguishing a plurality of service data received in a broadcast receiving system having a recording medium for storing a plurality of channel data bit streams. If received, a timestamp is added to the received data packet, and if an overnight download data packet through an external network is received, the time stamp is stored in the storage medium without adding a time stamp to the received data packet. By registering data type identification information indicating that the stored program is an overnight download program without a time stamp added to a navigation information file corresponding to a night download program, the data type identification information is used to match each data type during playback. Is characterized by reproducing a plurality of service data by a reproduction method.

Description

Data type identification information registration and reproduction method for distinguishing a plurality of service data {METHOD FOR REPRODUCING AND REGISTERING DATA TYPE ID INFORMATION FOR DISTINGUISHING PLURAL SERVICE DATA}             

1 is a block diagram of a broadcast receiving system to which an embodiment of the present invention is applied;

2 is an operation control flowchart for reproducing a plurality of service data according to an embodiment of the present invention;

3 is a view showing a storage state of a plurality of service data packets according to an embodiment of the present invention;

4 is a diagram illustrating a reproduction state of a plurality of service data packets according to an embodiment of the present invention.

The present invention relates to a recording device for recording and reproducing digital audio / video data of a plurality of channels transmitted through a broadcasting station or an external network to a recording medium. In particular, the recording medium includes a hard disk drive (HDD). A method of registering and reproducing data type identification information for distinguishing a plurality of service data in a broadcast receiving system.

Recently, the HDD, which is an auxiliary memory device of a computer system, is used as a random access storage device of the broadcast receiving system due to the advantage that the random access is possible, and the data transmission speed is high and it can be cheaper and larger in capacity than other auxiliary memory devices. have. Therefore, a user can receive various broadcast programs received from a broadcasting station and various video / audio programs received from an external network service provider using a broadcast receiving system having a hard disk as a recording medium as described above. By using the disc, you can enjoy various functions such as time shift and scheduled recording.

In this case, for various functions as described above, the broadcast receiving system adds an Arrival Time Stamp (ATS) to a data packet received from a broadcasting station or an external network, stores the time stamp on the HDD, and uses the time stamp for playback. A program corresponding to an arbitrary time can be reproduced and viewed in real time, and various functions such as time shift and reservation recording can be implemented.

However, the above functions such as real time playback, time shift, and reservation recording are possible in the broadcast program data packet transmitted from a broadcasting station whose transmission rate is 19.38 Mbps, but the transmission rate of the broadcast program data packet is 1 Mbps or the like. In the case of data packets from external networks that do not reach much, this was not practical. Therefore, a user downloads and stores a large amount of data packets during a late night without watching a broadcast, and reads them from the HDD at a convenient time. Hereinafter, a data packet downloaded from an external network during late night time as described above is referred to as an "overnight download data packet" and a program stored after the data packet has been downloaded is referred to as an "overnight download program".

That is, as described above, since data packets downloaded from an external network cannot be reproduced in real time due to a low transmission rate, it is not meaningful to add an ATS to the data packet. There was a problem in that the reproduction was difficult.

Accordingly, an object of the present invention is to provide a method of registering data identification information and reproducing service data for distinguishing a plurality of service data received from a broadcasting station and an external network in a broadcast receiving system.

In order to achieve the above object, the present invention provides a method of registering and reproducing data type identification information for distinguishing a plurality of service data received in a broadcast receiving system having a recording medium for storing a plurality of channel data bit streams. When a data packet of a broadcast program is received, a timestamp is added to the received data packet, and when an overnight download data packet is received through an external network, the time stamp is not added to the received data packet. After storing in the medium, by registering data type identification information indicating that the stored program is an overnight download program without a timestamp, in the navigation information file corresponding to the overnight download program, the data type identification information during reproduction. To And a plurality of service data are reproduced by a reproducing method suitable for each data type.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Many specific details are set forth in the following description and in the accompanying drawings, in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a schematic block diagram of a broadcast receiving system having a hard disk to which a embodiment of the present invention is applied as a recording medium. Referring to FIG. 1, the broadcast reception system according to an embodiment of the present invention includes a broadcast signal receiver 112, a buffer and time stamp inserter 104, a buffer and timing playback unit 110, and a main control unit (MCU). 106), HDD 108 and external network connection 102.

The broadcast signal receiving unit 112 includes an RF tuner for receiving a digital broadcast signal input from the outside, a plurality of RF tuners for receiving an analog broadcast signal input from the outside, and an analog signal input through the plurality of RF tuners. It consists of a plurality of data compressors that convert digital signals and compress them into multimedia files (AV files). The external network connection unit 102 receives and outputs a multimedia file from an external network 100 such as an IEEE 1394 network. The buffer and time stamp inserting unit 104 buffers and controls the multimedia file input from the broadcast signal receiving unit 112 and the external network connection unit 102 at a 27 MHz clock upon arrival of a source packet constituting the multimedia file. It captures the incremental internal counter value and inserts it into the input source packet to output it. The MCU 106 controls the overall operation of the broadcast receiving system according to the embodiment of the present invention. For example, the multimedia file (or binary file or text file) output from the buffer and time stamp inserting unit 104 is controlled to record and store in the file recording area of the HDD 108. The playback control of the file recorded in each data storage means is also performed. On the other hand, the buffer and timing reproducing unit 110 not only temporarily stores the multimedia file played by the HDD 108, but also reads the time stamped source packet constituting the multimedia file from the buffer and writes the time stamp. In this case, the source packet except for the time stamp is output to the A / V decoder 110. The A / V decoder 110 decodes and reproduces a data packet applied from the HDD 108 under the control of the MCU 106.

FIG. 2 illustrates data type identification in the MCU 106 of FIG. 1 for distinguishing a plurality of service data received from a broadcasting station and an external network in a broadcast receiving system having a hard disk as a recording medium according to an embodiment of the present invention. An operation control flowchart for information registration and reproduction is shown. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

First, when the user requests an overnight download to download a data packet from an external network during a night time when the user does not watch the broadcast, the MCU 106 responds to the step (200) to (202) of FIG. do. Subsequently, the MCU 106 stores the HDD 108 without adding a time stamp ATS to the data packet transmitted from the external network 100 in step 202.

In this case, the operation of the MCU 106 in step 202 will be described in more detail with reference to FIG. 3. That is, the MCU 106 can receive a broadcast program data packet capable of real-time reproduction received through the broadcast signal receiver 112. As for the packet (AP), the buffer and time stamp inserter 104 is controlled in the same manner as in the related art to add the ATS to the data packet and store it in the HDD 108, but from the external network 100 where the addition of the ATS is meaningless. In the case of the Overnight Download Data Packet (AP), as shown in FIG. 3 (b), the ATS is stored in the HDD 108 without adding an ATS.

Subsequently, the MCU 106 proceeds to step 204 and checks whether an overnight download data packet transmitted through the external network 100 is received. In this case, when the overnight download data packet through the external network 100 is received, the MCU 106 proceeds from step 204 to step 206 in response to the navigation information file for the overnight download program. The data type identification information indicating that the received and stored program is an overnight download program from the external network 100 is added to a navigation information file. The navigation information file is a file in which various information about the corresponding program stored in the HDD 108 is recorded. For example, the program title, the data amount of the program, the I-picture position information, and the timestamp (ATS) length ( AP_SZ). According to an exemplary embodiment of the present invention, the timestamp length is set to "0" (AP_SZ = 0) in a navigation information file corresponding to an overnight download program using the information on the timestamp length AP_SZ as data type identification information. ATS is distinguished from the added broadcast program.

Subsequently, when the MCU 106 stores the overnight download program and the broadcast program on the HDD 108 as described above, and a user requests a playback for a specific program, the MCU 106 responds in step 208 to step 210. Proceed to check whether the program requested to be played by the user is an overnight download program or a broadcast program. At this time, if the program requested to be reproduced is an overnight download program, the MCU 106 proceeds to step 214 in response to this in step 212 and is stored in the HDD 108 as shown in FIG. By using the interface method of reading the data packet of the over-night download program as much as the storage buffer capacity of the A / V decoder 110 at each request of the A / V decoder 110 to transmit to the A / V decoder 110. Play it back. On the contrary, if the program requested to be played back from the user in step 210 is a broadcast program, the MCU 106 proceeds to step 218 in response to step 216 and the process shown in FIG. As described above, the data packet of the broadcast program requested for reproduction is reproduced in real time through the A / V decoder 110.

Therefore, the over night download program is displayed in the navigation information file so as to be distinguished from the broadcast program, so that a plurality of service data can be reproduced according to the corresponding data type.

As described above, the present invention has an advantage of displaying an overnight download program in a navigation information file to be distinguished from a broadcast program so that a plurality of service data can be reproduced according to a corresponding data type.

Claims (7)

A method of registering data type identification information for distinguishing a plurality of service data received in a broadcast receiving system having a recording medium for storing a plurality of channel data bit streams, the method comprising: Storing a data stamp of a broadcast program by adding a timestamp to the received data packet; Storing an over-night download data packet that does not require a time stamp through an external network in the storage medium without adding a time stamp to the received data packet; And registering data type identification information indicating that the stored program is a program having no time stamp added in a navigation information file corresponding to a program to which the time stamp is not added. How to register data type identification information. The method of claim 1, wherein the data type identification information, And a timestamp length (AP_SZ) of the corresponding program stored in the recording medium. The method of claim 2, wherein the data type identification information, And "0" in the navigation information file of the program to which the time stamp is not added, thereby identifying the overnight download program. The method of claim 2 or 3, wherein the recording medium, A data type identification information registration method for distinguishing a plurality of service data, characterized in that the hard disk. A method of reproducing a plurality of service data stored in a broadcast receiving system having a recording medium for storing a plurality of channel data bit streams using data type identification information in a navigation information file, the method comprising: Checking a data type of the program requested to be reproduced by using data type identification information in a navigation information file of the program requested to be reproduced when a user requests a specific program to be reproduced; Transmitting the data packet of the corresponding program by the storage buffer capacity whenever the decoder requests the decoder, when the data type of the requested program is a time stamp-free program; When the data type of the program requested to be reproduced is a broadcast program transmitted in real time, a process of transmitting a data packet of the corresponding program to a decoder and reproducing the service in real time using a time stamp is provided. Way. The method of claim 5, wherein the data type identification information, And a timestamp length AP_SZ of a corresponding program stored in the recording medium. The method of claim 6, wherein the data type identification information, And "0" in the navigation information file of the program to which the time stamp is not added, thereby identifying a program to which the time stamp is not added.

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