KR100312511B1 - Apparatus and Method of Recording and Playing Broadcasting Data - Google Patents

Abstract

The present invention relates to an apparatus and method for storing and reproducing broadcast data capable of simultaneously viewing and recording analog and digital broadcasts.

The television according to the present invention includes a reproducing unit for reproducing analog signals and digital signals, a storage unit for storing analog signals and digital signals in the form of a digital stream, and a reproducing unit according to a reproducing mode, a storage mode, and a simultaneous reproducing storage mode. The control block for switching the signal transmission path of the analog signal and the digital signal supplied to the storage unit, the encoder for converting the analog signal into the digital stream signal, and the size of the digital stream signal and the digital broadcast signal according to the recording format of the storage unit. A stream controller for conversion, an analog digital channel selector for selecting a program to be stored among the output signals of the stream controller, and a buffer for temporarily storing the output signal of the analog digital channel selector.

According to the present invention, an analog and digital broadcast signal can be stored and displayed simultaneously without a separate device.

Description

Apparatus and Method of Recording and Playing Broadcasting Data

The present invention relates to an apparatus and method for storing and reproducing broadcast data, and more particularly to an apparatus and method for storing and reproducing broadcast data capable of simultaneously viewing and recording analog and digital broadcasts. It is about.

In the transitional situation where analog and digital broadcasts are being conducted at the same time, there is a need for storing and simultaneously watching analog and digital broadcasts. However, to store analog broadcasting and digital broadcasting, a separate external device such as a VCR or DVCR is required. This will be described with reference to FIGS. 1 and 2.

1 illustrates a conventional analog broadcast signal storage / display device for storing and displaying analog broadcast signals.

Referring to FIG. 1, a conventional analog broadcast signal storage / display device includes a video cassette recorder (VCR) 4 connected between an antenna 2 and a tuner 6, and a decoder 8 for decoding a signal from a tuner 6. On Screen Display (hereinafter referred to as "OSD") that displays channel information on the signal from the decoder 8, the signal of the OSD controller 10 is displayed. A note is provided with a display part 12. The antenna 2 receives an analog broadcast signal transmitted from a broadcast station. The analog broadcast signal received from the antenna 2 is input to the VCR 4. The VCR 4 stores the input analog signal or sends it to the tuner 6. The tuner 6 tunes an analog broadcast signal for each channel frequency and inputs it to the decoder 8. The broadcast signal input to the decoder 8 is divided into a video and audio signal and output to the OSD controller 10 and a voice controller (not shown). The audio signal is output to the speaker via a control circuit not shown. The OSD controller 10 adds channel information to the input image signal and outputs the channel information to the display part 12. The video signal input to the display part 12 is displayed on the television. 2 illustrates a digital broadcast signal storage / display device for storing and displaying a digital broadcast signal that has been recently tested and broadcast.

Referring to FIG. 2, a digital broadcast signal storage / display device includes a digital video cassette recorder (DVCR) 22 connected between an antenna 20 and a tuner 24, and a demodulator 26 for restoring a digital broadcast signal. ), An MPEG decoder 28 that separates the restored signal into video, audio, and data, and a video display part 30 displaying the separated video signal. The digital broadcast signal is modulated in a lateral side band (VSB) manner and transmitted from a broadcasting station. The antenna 20 receives a digital broadcast signal transmitted from a broadcast station. The digital broadcast signal received from the antenna 20 is stored in the DVCR 22 or input to the tuner 24. The tuner 24 tunes the digital broadcast signal for each frequency to extract a high frequency carrier signal. The extracted high frequency carrier signal is input to the demodulator 26 through a frequency conversion process from the tuner 24 to a low frequency. The demodulator 26 restores the digital broadcast signal modulated by the trailing sideband method. The amplifier decoder 28 separates an audio signal, a video signal, and data from the restored digital broadcast signal. The separated voice signal is input to a sound controller (not shown) and then output to a speaker. The data separated by the amplifier decoder 28 is input to a control circuit for various additional services (not shown). The video signal separated by the amplifier decoder 28 is input to the video display part 30 and displayed on a television.

Currently, broadcasting stations will transmit digital broadcasts as 8VSBs along with existing analog television broadcasts. In this type of broadcast, since a large amount of stream data is stored and played, it is impossible in the conventional method. In addition, conventional analog and digital televisions must have a separate VCR or DVCR to store broadcast signals. In particular, there is no solution in the case of simultaneously storing the analog and digital broadcast signals being broadcast.

Accordingly, an object of the present invention is to provide an apparatus and method for storing and reproducing broadcast data capable of simultaneously watching and storing a broadcast without a separate VCR or DVCR.

1 is a view showing a conventional analog program storage method.

2 is a view showing a conventional digital program storage method.

3 is a diagram illustrating a program storing method according to an exemplary embodiment of the present invention.

4 shows the analog-digital controller shown in FIG.

FIG. 5 shows the stream controller shown in FIG.

FIG. 6 shows the stream mixer shown in FIG. 5. FIG.

FIG. 7 shows the control block shown in FIG. 4. FIG.

8 is a flowchart showing the operation of the control block shown in FIG.

<Description of Symbols for Main Parts of Drawings>

2, 20, 50, 52: antenna 4: VCR

6, 24: Tuner 8: Decoder

10: OSD control unit 12: Display part

22: DVCR 26: demodulator

28: MPEG decoder 30: video display part

54: NTD part 56: ATVD part

58: IDE control unit 60: hard disk

62: TMD part 64: CPU

66: VDP section 68: television encoder

70: analog bus 72, 74: digital bus

80: ADRCB 88: MPEG2 Encoder

90: identification information provider 92: stream mixer

94: RID / PID Detector 95: Analog Digital Channel Selector

96, 98: FIFO buffer 100: ADRPC part

102: internal bus 110: digital data stream

120: analog data stream 130: data stream

150: first multiplexer 152: second multiplexer

154: multiplexer controller 156: third multiplexer

158: fourth multiplexer

In order to achieve the above object, a television of the present invention includes a reproducing unit for reproducing analog signals and digital signals, a storage unit for storing analog signals and digital signals in the form of a digital stream, a reproducing mode, a storage mode, and a simultaneous reproducing storage mode. A control block for switching the signal transmission paths of the analog and digital signals supplied to the reproducing section and the storing section, an encoder for compressing and converting the analog signal into a digital stream signal, and the size of the digital stream signal and the digital broadcast signal. A stream controller for converting to a negative recording format, an analog digital channel selector for selecting a program to be stored among the output signals of the stream controller, and a buffer for temporarily storing the output signal of the analog digital channel selector.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIG. 3.

Referring to FIG. 3, a receiver for receiving a digital broadcast signal and an analog broadcast signal, and an analog and digital record and playback controller for recording or playing back an output signal of the receiver are described below. And a display unit for displaying the played back signal.

Antennas 50 and 52 receive analog and digital signals. The received analog signal is tuned for each frequency in the tuner and decoder unit NT54 and decoded and input to the ADRPC unit 100. The received digital signal is tuned by the tuner and demodulator (ATSC Tuner and VSB Demodulator (hereinafter referred to as 'ATVD') section 56 for each frequency and then demodulated into a digital signal of 19.4 Mbps and input to the ADRPC unit 100. Data to be stored among the data input to the ADRPC unit 100 is stored in the hard disk 60 via a host bus 59 and an integrated device electrical (IDE) control unit 58. The data to be reproduced among the data input to the ADRPC unit 100 is reconstructed by a video decoder (Transport Signal and MPEG Decoder (TMD) hereinafter) 62, and then a video display processor (hereinafter referred to as 'VDP'). 66 is displayed on the television encoder 68. The process of playing back the data stored in the hard disk 60 is also displayed on the television through the TMD 62 and the VDP 66 as described above. 4 is a block diagram showing the ADRPC unit 100 in detail.

Referring to FIG. 4, an analog and digital record control block (hereinafter referred to as 'ADRCB') 80 for extracting analog broadcast and digital broadcast data to determine storage and reproduction, and analog and digital data. An analog and digital transport signal stream controller (hereinafter, referred to as 'ADTSC') 200 is shown.

The ADRCB 80 determines whether to store and reproduce the data input from the NTD unit 54 and the ATVD unit 56. The data to be reproduced is input to the TMD unit 62. The analog data to be stored is input to an Moving Picture Experts Group 2 Encoder (hereinafter referred to as 'MPEG2 encoder') 88 through an 8-bit analog bus 70. The analog data input to the MPEG2 encoder 88 is compressed and converted into a digital signal of 188 bytes of PES (packet elementary stream). The PES data compressed by the MPEG2 encoder 88 is input to the ADTSC 200. The digital data to be stored is also input to the ADTSC 200 via an 8-bit digital bus 72.

An internal structure of the ADTSC 200 will be described in detail with reference to FIG. 5. The PES data stream input from the MPEG2 encoder 88 is input to the identification information adder 90 (Recorder Identification: hereinafter referred to as 'RID'). The stream input to the RID adder 90 becomes a 6Mbps data stream through RID grant and is input to the stream mixer 92. The stream mixer 92 receives a 6 Mbps data stream input from the RID adder 90 and a 19.4 Mbps digital data stream input from the 8-bit digital bus 72. Each data stream input to the stream mixer 92 is subjected to synchronous detection to be a data stream of 25.4 Mbps. Referring to FIG. 6, it can be seen that 1 packet of the analog data stream 120 corresponds to 3 packets of the digital data stream 110 to generate a new data stream 130. The generated data stream 130 is input to the RID / packet detector 94. The RID / Packet Detector 94 detects RIDs and packets that match the program selected by the Analog and Digital Channel Selection 95. The stream signal composed of the detected packets is input to a FIFO (First In First Out) receiving buffer 96. The input stream signal is stored in an IDE interface type hard disk 60 via an internal bus 102 capable of bidirectional communication. The stored data is input to the FIFO transmission buffer 98 via the internal bus 102 when the playback instruction of the CPU 64 is recognized. The input data is output from the FIFO transmit buffer 98 and input to the ADRCB 80 via the 8-bit digital bus 74. Data input to the ADRCB 80 is MPEG decoded in the TMD 62 and displayed.

FIG. 7 is a detailed block diagram showing the ADRCB 80 in detail, and FIG. 8 is a flowchart showing the control procedure of the ADRCB 80 step by step.

7 and 8, the multiplexer controller 154 controls the operations of the multiplexers 150, 152, 156 and 158 according to a store / send command. First, an analog signal applied by channel tuning in the NTD unit 54 is applied to the first multiplexer 150 and the second multiplexer 152 (step 210). The first multiplexer 150 receives a transmission command from the multiplexer controller 154 and outputs an analog signal to the TMD 62 (steps 212 and 222). The second multiplexer 152 stores a command of the multiplexer controller 154. On receipt of the signal, the signal is turned on. If the storage command is not received, the signal is turned off (steps 212 and 214). In operation 216, the digital signal input from the ATVD unit 56 is applied to the third multiplexer 156 and the fourth multiplexer 158 (step 210). The third multiplexer 156 receives a transmission command from the multiplexer controller 154 and outputs a digital signal to the TMD 62 (steps 218 and 224). The fourth multiplexer 158 stores a storage command of the multiplexer controller 154. On receipt of the signal, the signal is turned on. If it is not received, the signal is turned off. (Steps 218 and 220) The fourth multiplexer 158 receives the input signal from the ADTSC unit through the digital bus 72 when the storage command is received. If a pause command is input from the user, the multiplexer controller 154 turns off the first multiplexer 150 and the second multiplexer 150. Step 152 stores the analog broadcast signal by turning it on (steps 230 and 232). As described above, the analog broadcast signal is compressed and stored by the MPEG2 encoder 88 into a digital signal (step 232). Play command from user When the input is input, the multiplexer controller 154 turns on the third multiplexer 156 (steps 234 and 236). That is, since the analog broadcast signal is compressed and stored as a digital signal, the multiplexer controller 154 displays the screen through the third multiplexer 156. Is displayed. At the same time, the analog signal currently input is stored through the second multiplexer 152. (Step 236) In this way, the analog broadcast signal can be stored and viewed on a television. In the case of a digital signal, when a pause command is input from a user, the multiplexer controller 154 turns off the third multiplexer 156 and turns on the fourth multiplexer 158 to store the digital broadcast signal. When the play command is input from the user during the storage, the multiplexer controller 154 turns on the third multiplexer 156 (steps 234 and 236). That is, the digital broadcast signal turns the third multiplexer 156 on. The digital signal displayed on the screen and currently input is stored by the fourth multiplexer 158. (Step 236) In this manner, the digital broadcast signal can be stored and viewed on a television. In addition, the second multiplexer 152 and the fourth multiplexer 158 may be turned on to simultaneously store and view the analog broadcast signal and the digital broadcast signal.

As described above, the apparatus and method for storing and reproducing broadcast data according to the present invention have an advantage of simultaneously displaying and storing analog and digital broadcast signals without a separate device. Therefore, there is no need to install a separate VCR or DVCR, and the data stream can be reduced because the broadcast signal is compressed and stored. In addition, the digital broadcast signal can be stored while watching the analog broadcast, and the analog broadcast can be stored while watching the digital broadcast. In addition, analog and digital broadcasts can be stored simultaneously and broadcasts can be played back.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (8)

An apparatus for storing and reproducing analog and digital broadcast signals in real time, A reproducing unit for reproducing the analog signal and the digital signal; A storage unit for storing the analog signal and the digital signal in the form of a digital stream; A control block for switching signal transmission paths of analog and digital signals supplied to the reproducing section and the storing section according to a reproducing mode, a storing mode and a simultaneous reproducing storage mode; An encoder for compressing and converting the analog signal into a digital stream signal; A stream controller for converting the size of the digital stream signal and the digital broadcast signal according to a recording format of the storage unit; An analog digital channel selector for selecting a program to be stored among the output signals of the stream controller; And a buffer for temporarily storing the output signal of the analog digital channel selector. The method of claim 1, The control block includes: a first multiplexer for transmitting the analog broadcast signal to the playback unit in accordance with the playback mode and the simultaneous playback storage mode; A second multiplexer for transmitting the analog broadcast signal to the storage unit in accordance with the storage mode and the simultaneous playback storage mode; A third multiplexer for transmitting the digital broadcast signal to the playback unit according to the playback mode signal and the simultaneous playback storage mode; A fourth multiplexer for transmitting the digital broadcast signal to the storage unit according to the storage mode signal and the simultaneous reproduction storage mode; And a multiplexer controller for controlling the operation of the first to fourth multiplexers. The method of claim 2, The first multiplexer stops transmitting the analog broadcast signal according to a pause command of the multiplexer controller, The second multiplexer sends the analog broadcast signal to a storage unit according to the pause command; The third multiplexer stops transmitting the digital broadcast signal according to the temporary storage command; And the fourth multiplexer transmits the digital broadcast signal to a storage unit according to the pause command. The method of claim 3, wherein The second multiplexer outputs the analog broadcast signal to a storage unit according to the reproduction mode and the simultaneous reproduction storage mode. The third multiplexer outputs a digital broadcast signal and an analog broadcast signal from the storage unit to the playback unit according to the playback mode and the simultaneous playback storage mode. And the fourth multiplexer transmits the digital broadcast signal to a storage unit according to the reproduction mode and the simultaneous reproduction storage mode. The method of claim 1, The stream controller may include: an identification information provider for assigning identification information to the digital stream signal; A stream mixer which synchronizes on the basis of an output signal of the identification information provider among the digital broadcast signal and an output signal of the identification information provider; And a program extractor for extracting a specific program according to an identification signal included in each of the digital broadcast signal and the digital stream signal by the control from the analog digital channel selector. The method of claim 5, And the stream mixer synchronizes the digital broadcast signal and the digital stream signal such that three packets of the digital broadcast signal and one packet of the output signal of the identification information adder correspond to each other. In the method for storing and playing analog and digital broadcast signals in real time, Setting a play mode, a storage mode, a simultaneous play storage mode, and a pause mode; Reproducing the analog broadcast signal according to the reproduction mode and the simultaneous reproduction storage mode; Converting and storing the analog broadcast signal into a digital stream according to the storage mode and the simultaneous playback storage mode; Reproducing the digital broadcast signal according to the reproduction mode and the simultaneous reproduction storage mode; And storing the digital broadcast signal according to the storage mode and the simultaneous playback storage mode. The method of claim 7, wherein Stopping transmission of the analog broadcast signal in accordance with the pause mode; Converting and storing the analog broadcast signal into a digital stream according to the pause mode; Stopping transmission of the digital broadcast signal according to the temporary storage mode; And storing the digital broadcast signal according to the temporary storage mode.