KR20010092116A - A receiving device and a method for storing and reproducing a satellite broadcasting - Google Patents

Abstract

PURPOSE: A receiving device for storing and replaying satellite broadcasting and a method for the same are provided to store video and audio data transmitted from a satellite to a storage medium and replay the stored video and audio data. CONSTITUTION: A data converter(100) converts a DVB(Digital Video Broadcasting) transport stream to data for storage and replay. A PCI(Peripheral Component Interconnection) control portion(200) controls mutual connection between component devices inserted into expansion slots. A PCI bus(300) provides a path for storing video data and audio data. A hard disc(400) stores the transmitted video and audio data. A multiplexer(500) multiplexes one transport stream and an extracted transport stream signal. A demultiplexer(600) separates the multiplexed video and audio data. A processor(700) controls operations of the data converter(100) and the demultiplexer(600) and a multitude of input and output signals. An MPEG-2 decoder(800) decodes the separated video and audio data.

Description

A RECEIVING DEVICE AND A METHOD FOR STORING AND REPRODUCING A SATELLITE BROADCASTING}

The present invention relates to a receiving apparatus and method for storing and reproducing satellite broadcasting, and more particularly, to restore and store data and audio data of a program produced by a broadcasting station by compressing and transmitting the stored data and stored audio and video. The present invention relates to a receiving apparatus and a method for reproducing data without reproducing error.

Hereinafter, a conventional satellite broadcast receiver will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a conventional satellite broadcast receiver.

As shown in FIG. 1, a conventional satellite broadcast receiver includes a demultiplexer 10; A processor 20; Moving Picture Experts Group (MPEG) 2 decoder 30. Data including video and audio is compressed by the MPEG-2 compression algorithm and converted into digital satellite broadcast data, and then transmitted in a DVB (DVB) transport stream. The transmitted DVB transport stream is received by the demultiplexer 10 and separated by PID (PID: Program IDentification) information included in the received video and audio data. Video and audio data are reproduced by That is, since the transmitted video and audio data are compressed by the MPEG-2 method, the restored video and audio data are restored by the MPEG-2 decoder 30, and the restored video and audio data are output to a video device such as a TV so that a viewer can watch a broadcast. To help. At this time, the processor 20 controls the demultiplexer 30 to separate only the necessary PID, and performs the function of initializing the MPEG-2 decoder 30.

By the way, the conventional satellite broadcast receiver can restore the video and audio data included in the DVB transport stream transmitted through the satellite and output the video and audio data to the video device, but the video and audio data stored by the viewer are stored and stored. There is a problem that can not be restored by playing back.

The technical problem to be solved by the present invention is to provide a receiving device that can digitally store the image and audio data transmitted through the satellite, and reproduce the stored image and audio data. Its purpose is to.

1 is a block diagram showing the structure of a conventional satellite broadcasting receiver.

2 is a block diagram illustrating a configuration of a receiver for storing and reproducing satellite broadcasts according to an exemplary embodiment of the present invention.

3A to 3C are diagrams illustrating the structure of a transport stream according to an embodiment of the present invention.

4 is a block diagram illustrating an internal structure of the data converter of FIG.

5 is a flowchart illustrating a receiving method for storing and reproducing satellite broadcasting according to an exemplary embodiment of the present invention.

Receiving apparatus for storage and playback of satellite broadcasting according to one feature of the present invention for achieving the above object,

And a demultiplexer configured to receive the video and audio data transmitted through the satellite and separate the video and audio data, a processor to control the demultiplexer, and a decoder to restore the video and audio data separated by the demultiplexer. As a receiving device,

Signal analysis / packet interval generating means for analyzing a specific signal included in a packet of input video and audio data, calculating a next arrival time of the specific signal, and including the packet in the packet;

Storage means for storing the video and audio data contained in the packet generated by the signal analysis / packet interval generating means;

Time interval adjusting means for adjusting and outputting a time interval of the packet for reproduction of the video and audio data stored in the storage means

It is made, including.

It is preferable that the said specific signal is packet identification information of the said packet.

According to another aspect of the present invention, a method for receiving and storing satellite broadcasts includes:

And a demultiplexer configured to receive the video and audio data transmitted through the satellite and separate the video and audio data, a processor to control the demultiplexer, and a decoder to restore the video and audio data separated by the demultiplexer. A satellite broadcast reception method using a receiver,

Analyzing the received video and audio data, calculating a next arrival time of a specific signal included in the video and audio data, and including the same in the video and audio data;

Calling and playing the stored video and audio data;

It is made, including.

In the storing step, the next arrival time information of the specific signal is preferably stored at the head of the video and audio data.

In the reproducing step, it is preferable to adjust the time interval between the video and the audio data having the specific signal to match the original signal and reproduce the same.

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

2 is a block diagram illustrating a configuration of a receiver for storing and reproducing satellite broadcasts according to an exemplary embodiment of the present invention.

As shown in FIG. 2, a receiving apparatus for storing and playing satellite broadcasts according to an embodiment of the present invention receives and stores a DVB transport stream mixed with video and audio data input through an antenna (not shown). A data converter 100 for converting information into a form for reproduction and reproduction; A PCI (PCI: Peripheral Component Interconnect (PCI) controller) for smoothly controlling interconnections between devices attached to a plurality of expansion slots; A PCI bus 300 providing a path for storing transmitted video and audio data; A hard disk 400 for storing the transmitted video and audio data; A multiplexer 500 for multiplexing the original transport stream and the extracted transport stream signal for playback after storage; A demultiplexer 600 for separating the multiplexed video and audio data through the multiplexer 500; A processor 700 that controls operations of the data converter 100 and the demultiplexer 600 and controls a plurality of input / output signals; MPEG-2 decoder 800 for decoding the video and audio data separated by the demultiplexer 600, so that viewers can view the compressed video and audio data.

3A to 3C are diagrams showing the structure of a transport stream according to an embodiment of the present invention, FIG. 4 is a block diagram showing the internal structure of the data converter of FIG. 2, and FIG. 5 is an embodiment of the present invention. Is a flowchart illustrating a receiving method for storing and reproducing satellite broadcasting.

As shown in FIG. 4, the data converter 100 includes: an input transport stream interface 100 for converting a DVB transport stream input through an antenna into a signal suitable for signal processing; A PID analysis / packet interval generation unit 120 for identifying and analyzing PIDs included in transport packets of the DVB transport stream and generating information according to time intervals of each packet; A memory interface 130 for converting the input image and audio data into signals of a form suitable for storage; S-RAM 140 for temporarily storing the input video and audio data; A PCI / communication interface 150 for converting a control signal of the PCI controller 200, a control signal of the processor 700, and various transmission signals into a signal that can be processed in a corresponding region; A DM (Direct Memory Access, DMA) controller 160 generating a control signal for transmitting and storing video and audio data without passing through the processor 700; An output transport stream timing controller 170 for controlling a time interval between transport packets of a transport stream so that a user can watch video and audio data as an original signal without error; An output transport stream interface 180 for converting a signal to enable multiplexer 500 input of the transport stream; And a clock controller 190 for controlling a clock for precisely timing the bytes of the bit stream of the transport stream.

Hereinafter, an operation of a reception device for storing and reproducing satellite broadcasts according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The form of data transmitted through a satellite broadcasting transmitter (not shown) is transmitted in the form of a transport stream, as shown in FIG. 3A. Transport streams are multiplexed and separated by transport packets of 188 bytes. The transport packet itself is a fixed length, relatively short, simple in structure, and a bit string carrying a plurality of programs.

Each transport packet includes sync byte, error indication, unit start indication, transport packet priority, PID, scramble control, adaptation field control, traversal counter, adaptation field, and user information.

The sync byte is a data for the MPEG-2 decoder 800 to detect the head of a transport packet as a sync signal, and can be detected using a method such as several consecutive detections for reliable detection. Error Error Indication indicates the presence or absence of a bit error in a transport packet. The unit start indication indicates that a new Packetized Elementary Stream (PES) packet is started from the information of this transport packet. Here, PES refers to a plurality of packet bundles. The transport packet priority indicates the importance of this transport packet. PID is packet identification information and represents an attribute of an individual bit string of a corresponding packet. The scramble control indicates whether or not the information of this packet is scrambled and the type. Here, scramble means encryption of a data string. Adaptive field control indicates the presence or absence of an adaptation field and information of this packet. The traversal counter is information for detecting whether a packet having the same PID is partially lost during transmission. The traversal counter detects whether the packet has been lost due to the continuity of the traversal counter information. The adaptation field may contain side information or invalid data bytes relating to individual bit strings, and may transmit dynamic state change information of individual bit strings.

The transport stream as described above is converted through the input transport interface 110 of the data converter 100 and input to the PID analysis / packet interval generation unit 120 (S100). The PID analysis / packet interval generation unit 120 checks and analyzes the PID included in the transport packet of the input transport stream (S110), generates information according to the time interval of each packet (S120), and attaches As shown in FIG. 3C, the memory is stored in the RAM 140 through the memory interface 130 in addition to the time display area of 2 bytes before the sync byte (S130). In this case, the PID analysis / packet interval generation unit 120 includes time information according to the interval of the same PID in the time display area as shown in FIG. 3B. For example, a time corresponding to a packet interval between packets having a PID of 100 initially input packets is generated and included before the sync byte.

The processor 700 transmits a control signal for storing the bit string of the transport packet stored in the S RAM 140 to the hard disk 400 through the PCI / communication interface 150 to separate only the desired PID. By the control signal, the transport packet bit string stored in the S RAM 140 is stored in the hard disk 400 through the PCI bus 300 (S140). The PCI controller 200 controls the data flow of the transport packet bit stream transmitted through the PCI bus 300. In the embodiment of the present invention, the data storage device for satellite broadcasting is a hard disk of a personal computer, but a general hard disk is also possible and is not limited to the embodiment of the present invention.

Depending on whether the video and audio data are stored and reproduced (S150), in order to play the video and audio data stored in the hard disk 4OO, the processor 700 transmits a control signal for reproducing the video and audio data to PCI / communication. The PCI controller 200 is transmitted to the PCI controller 200 through the interface 150, and the PCI controller 200 receives the video and audio data stored in the hard disk 400 (S160) through the PCI bus 300. The communication interface 150 transmits the data to the DMA controller 160. The DMA controller 160 generates a control signal for transmitting and storing the video and audio data to a video memory and an audio memory (not shown), which are storage devices for decoding the received video and audio data, without going through the processor 700. . By the control signal of the DMA controller 160, video and audio data are transmitted to the output transport stream timing controller 170, and the output transport stream timing controller 170 adjusts the packet interval time included in the transport packet. By reconstructing the data in the form of a transport stream as an original signal, and transmits to the multiplexer 500 through the output transport stream interface 180 (S170).

The multiplexer 500 multiplexes the transport stream and the reproduced transport stream of the original signal to the demultiplexer 600 (S180). The demultiplexer 600 separates video and audio data from the received transport stream (S190), and each of the separated video and audio data is decoded by an MPEG-2 decoder (S200) and output to an output device such as a TV. And playback (S210). In the embodiment of the present invention, although the output device of the video and audio data is a TV, the output of the video and audio data is possible through an output device other than a TV capable of reproducing the video and audio data. It is not.

The present invention is only one embodiment, and many modifications and variations are possible without departing from the spirit of the invention.

As described above, the receiving apparatus and method for storing and reproducing the satellite broadcast of the present invention digitally store the image and audio data transmitted through the satellite, and the stored image and audio data again without error Can play.

Claims (5)

And a demultiplexer configured to receive the video and audio data transmitted through the satellite and separate the video and audio data, a processor to control the demultiplexer, and a decoder to restore the video and audio data separated by the demultiplexer. In a receiving device, Signal analysis / packet interval generating means for analyzing a specific signal included in a packet of input video and audio data, calculating a next arrival time of the specific signal, and including the packet in the packet; Storage means for storing the video and audio data contained in the packet generated by the signal analysis / packet interval generating means; Time interval adjusting means for adjusting and outputting a time interval of the packet for reproduction of the video and audio data stored in the storage means Receiver for storage and playback of satellite broadcasts comprising a. In claim 1, The specific signal And a receiver for storing and reproducing satellite broadcasts. And a demultiplexer configured to receive the video and audio data transmitted through the satellite and separate the video and audio data, a processor to control the demultiplexer, and a decoder to restore the video and audio data separated by the demultiplexer. In the satellite broadcast receiving method using a receiver, Analyzing the received video and audio data, calculating a next arrival time of a specific signal included in the video and audio data, and including the same in the video and audio data; Calling and playing the stored video and audio data; Receiving method for the storage and playback of satellite broadcasts comprising a. In claim 3, The storing step And storing the next arrival time information of the specific signal at the head of the video and audio data. In claim 3, The regeneration step And controlling the time interval between the video signal and the audio data having the specific signal to match the original signal and play the received original signal.