KR100243239B1 - Programmed recording apparatus of dvcr not having self-tunner and programmed recording method - Google Patents

Abstract

The present invention relates to a reservation recording apparatus for a digital video cassette recorder without a tuner and a reservation recording method according thereto, wherein the reservation recording apparatus receives a broadcast signal, generates a digital transport stream from the received broadcast signal, and transmits the same. A digital television receiver for extracting and displaying broadcast program information included in the stream on a screen and outputting the digital transport stream to the digital video cassette recorder; Select a broadcast program to be reserved using the broadcast program information displayed on the screen of the digital television receiver, store information on the selected broadcast program, count the stored broadcast time, and when the time is reached, the digital program is broadcasted. And a digital video cassette recorder which checks the power supplied to the television receiver and its own power supply, selects the reserved program from the transport stream output from the digital television receiver, and records the reserved program on a recording medium.

Therefore, according to the present invention as described above, by having a control command transmitted through the digital interface unit without having its own tuner, it is possible to make a reservation recording using the tuner of the digital television receiver.

Description

Reservation recording device for digital video cassette recorder without its own tuner and corresponding recording method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reservation recording apparatus for a digital broadcast signal and a reservation recording method thereof, and more particularly, to a predetermined broadcasting program using a digital television receiver or a set-top box in a digital video cassette recorder (DVCR) that does not have its own tuner. The present invention relates to a reservation recording apparatus for reserve recording and a reservation recording method thereof.

As digital audio / video devices have been rapidly digitized in recent years, television receivers and video cassette recorders have also encouraged the birth of high-definition television receivers (HDTVs) and high-definition video cassette recorders (HDVCRs). have. Digital audio / video devices offer superior picture quality and sound compared to analog.

In developing digital video / audio devices, it is difficult to overlook the functions provided by conventional analog AV devices. In other words, the functions provided in the analog AV device, in particular, the reservation recording function, should not be overlooked as they are familiar to the user.

Conventional analog VCRs have their own built-in tuner, allowing them to be reserved independently of the TV. However, since the digital video cassette recorder does not have its own tuner, it is necessary to implement reservation recording using a digital TV or a set top box.

SUMMARY OF THE INVENTION The present invention has been created to meet the above-described needs, and a first object of the present invention is to provide a reservation recording apparatus in a digital video cassette recorder that does not have its own tuner, and to provide a reservation recording method accordingly. It is done.

1 is a schematic diagram of a reservation recording apparatus for a digital broadcast signal according to the present invention.

FIG. 2 is a diagram showing the detailed configuration of the reserved recording apparatus of the digital broadcast signal shown in FIG.

3 is a diagram illustrating a detailed configuration of the digital interface unit shown in FIG. 2.

4 is a diagram for explaining a reservation recording method according to the present invention.

A reservation recording apparatus of a digital video cassette recorder having no own tuner according to the present invention for achieving the first object is to receive a broadcast signal, generate a digital transport stream from the received broadcast signal, and include it in the transport stream. A digital television receiver for extracting the displayed program information and displaying the same on a screen and outputting the digital transport stream to the digital video cassette recorder; Select a broadcast program to be reserved using the broadcast program information displayed on the screen of the digital television receiver, store information on the selected broadcast program, count the stored broadcast time, and when the time is reached, the digital program is broadcasted. It is preferable to include a digital video cassette recorder which checks the power supplied to the television receiver and its own power supply, selects the reserved program from the transport stream output from the digital television receiver, and records the recorded program on a recording medium.

The digital television receiver and the digital video cassette recorder may include respective digital interface units for mutually interfacing broadcast signals and control commands.

According to the present invention for achieving the second object, a digital video cassette recorder having a second digital interface unit without its own tuner, and a first for receiving a digital broadcast signal and communicating with the digital video cassette recorder. A method for reservation recording a digital broadcast signal using a digital television receiver having a digital interface unit includes the steps of: inputting reservation recording information; Storing the input reservation recording information and driving a timer; Determining whether a broadcast time of the reserved broadcast program is reached; As a result of the determination, supplying power to the digital television receiver and the digital video cassette recorder when the scheduled time of the scheduled broadcast program arrives, and switching the broadcasting channel of the digital television receiver; Receiving a transport stream output from the digital television receiver; And selecting and recording a reserved broadcast program in the received transport stream.

The step of inputting the reservation recording information is characterized by inputting the reservation recording information by extracting the broadcast program information included in the transport stream to display on the screen, by selecting the broadcast program to be reserved from the displayed broadcast program.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

1 is a schematic diagram of a reservation recording apparatus for a digital broadcast signal according to the present invention.

The apparatus shown in FIG. 1 receives a broadcast signal, generates a digital transport stream from which an error correction code is deleted, transmits the generated transport stream, and extracts broadcast program information included in the digital transport stream. Selects a broadcast program to be reserved from the program information displayed on the digital television receiver 10 and the digital television receiver 10 to be displayed and reserves the recording, stores the recording information of the reserved broadcast program, and broadcasts the stored broadcast program. The digital video cassette recorder 20, the digital television receiver 10, and the digital video cassette recorder 20, which count the time and select a reserved broadcast program from the transport stream output from the digital television receiver 10 and record the recorded program on a recording medium. ) Is made of a cable 30 for connecting.

The digital television receiver 10 includes a tuner 100 for demodulating a broadcast signal received from a broadcasting station, a channel decoder 102 for deleting an error correcting code from the demodulated broadcast signal and outputting a transport stream corresponding to a system layer, and a channel decoder. A first digital interface unit 104 for transmitting the transport stream output from the 102 to the digital video cassette recorder 20, and a transport stream extraction unit (TS-DEMUX) for extracting broadcast program information included in the transport stream. And a display unit 106 for displaying the extracted broadcast program information.

The digital video cassette recorder 20 uses the broadcasting program information displayed on the display unit 106 to record a reserved recording from the user interface unit 200 and the user interface unit 202 for transmitting a user command for selecting a reserved program. A second digital interface unit 202 for receiving and storing information, checking a broadcast time of a scheduled broadcast program, and selecting and outputting a transport stream of a corresponding channel among the transport streams transmitted from the first digital interface unit 104; A channel codec unit 204 for coding the broadcast signal output from the second digital interface unit 202, and a recording / reproducing unit 206 for recording the channel coded broadcast signal to the recording medium 208. Is made of.

The operation of the reservation recording apparatus shown in FIG. 1 is as follows.

First, the power supply to the digital television receiver 10 and the digital video cassette recorder 20 is checked. The broadcast signal input through the antenna or the network is received through the tuner 100 of the digital television receiver 10, and the broadcast signal received through the tuner 100 is deleted through the channel decoder 102. The transport stream corresponding to the system layer is output. The transport stream is output through the first digital interface unit 104, and the broadcast program information included in the transport stream is extracted through the transport stream extraction unit 105, displayed on the display unit 106, and the displayed broadcast program information. The user selects a broadcast program that the user wants to reserve. The selected broadcast program information (for example, a broadcast time and channel of the selected broadcast program) is stored in a memory (not shown) of the second interface unit 202, and a timer or a time comparator (not shown) is operated. At this time, the power supplied to the digital television receiver 10 and the digital video cassette recorder 20 may be cut off. Here, even if the entire power is cut off, power should be supplied to the reserved recording related part of the microcomputer (not shown) including the digital interface 104 and 202. In addition, a timer (not shown) for checking the airing time of the program selected by the user is operated. When the airing time of the broadcast program selected by the operation of the timer is reached, power is supplied to the tuner of the digital television receiver 100 to be reserved. The broadcast program is recorded on the recording medium 208.

FIG. 2 is a diagram illustrating a detailed configuration of the reserved recording apparatus for the digital broadcast signal shown in FIG. 1, wherein the reserved recording apparatus for the digital broadcast signal using an HDTV (High Definition VCR) without an ATV (Advanced Television) and its own tuner is shown. A diagram for explaining.

In the apparatus shown in FIG. 2, the same reference numerals as those shown in FIG.

The ATV used in the present invention is an American HDTV proposed by ATSC (Advanced Television System Committee), which has MPEG2-TS as a transmission format, and has an IEEE1394 digital interface. In addition, ATV STB (Set Top Box), which can substitute for ATV, is a system having an IEEE1394 digital interface for receiving and transmitting ATV broadcasting signals, and receiving digital broadcasting signals or signals transmitted from a network. It refers to a device that converts to a transport stream and outputs it through a digital interface such as IEEE1394. HDVCR is a system that can record and play ATV broadcast signal.

Digital television receiver (DTV) and digital video cassette recorder (DVCR) are broader terms than ATV and HDVCR, and mean a device that can handle data generated by using digital signal compression technology. Can be used in common for all DTVs and DVCRs using a digital interface.

The IEEE 1394 High Performance Serial Bus is an interface used for data transmission between digital devices such as home appliances and PCs. The IEEE 1394 High Performance Serial Bus supports both Asynchronous and Isochronous. The transmission speeds defined so far include 100 mega bps, 200 mega bps, 400 mega bps, and the like.Physical layer, link layer, transaction layer, serial bus management layer Management Layer).

IEC1883 is an AV device employing IEEE1394 as a digital interface, and acts as a higher protocol of IEEE1394, and defines a connection management protocol (hereinafter referred to as CMP) and a function control protocol (hereinafter referred to as FCP). CMP is used to establish a connection for audio / video data transmission, and FCP defines a method of sending and receiving control commands such as AV / C CTS (AV Control Command and Transaction Set).

A brief operation of the ATV and the HDVCR shown in FIG. 2 will now be described.

The ATV receives the bit stream transmitted through the terrestrial wave through the tuner 100, and the received broadcast signal is deleted from the channel decoder 102 so as to be MPEG2-TS. The transport stream extractor 108 extracts video, audio, and other information (broadcast program information) from the transport stream output from the channel decoder 102, and the extracted video, audio, and broadcast program information is transmitted through the decoder 108. The decoded program information is displayed on the display unit. Also, when the digital output of the received signal is required, the ATV transmits the output of the channel decoder 102, that is, the MPEG2-TS, to the digital interface 104 such as IEEE1394.

In an HDTV system using MPEG2-TS such as ATV broadcasting, multiple programs (typically one HD quality and three to four programs in SD quality) are multiplexed into MPEG2-TS in one channel band (6MHZ). The program selection process is necessary because it comes in.

On the other hand, HDVCR for recording and playing back ATV broadcast receives the MPEG2-TS signal (a signal received from the ATV) received by the second digital interface unit 202 during recording, and selects one program to be recorded. After the channel encoding is performed through the channel codec unit 204, the recording is performed on the recording medium 208, and during playback, the channel is decoded by reproducing the signal recorded on the recording medium 208. Displayed on the screen 106 through the section 104,202.

3 is a diagram illustrating a detailed configuration of the digital interface unit shown in FIG. 2.

The physical layer 300, which is the lowest layer, receives a bit string from the link layer 302, which is the upper layer, obtains a right to use a serial bus, encodes it, converts it into an electrical signal, and transmits data on the bus. On receipt, the reverse process is performed.

Since the link layer 302 handles data on a packet basis, the link layer 302 plays a role in constructing and decomposing packets, detecting errors, and managing bus cycles. The physical layer 300 and the link layer 302 are generally composed of chipsets.

The transaction layer 304 provides transactions such as read / write / lock, and performs asynchronous communication with other nodes on the IEEE 1394 bus by using a service provided at a lower layer.

The serial bus management layer 306 incorporates various data structures such as a configuration ROM and a control and status register (CSR), and manages the top layer such as power management and topology / speed map management.

Transaction layer 304 and serial bus management layer 306 are written in software and embedded in the microcomputer is a common implementation. There are two transmission modes supported by IEEE1394. The asynchronous transmission method and the simultaneous transmission method are used. In the asynchronous transmission method, operations such as read / write / lock to a specific address of another node are performed. . Simultaneous transmission method is used for real-time transmission of audio / video data, and microcomputer is only involved in initial setup. The control command mentioned in the present invention uses asynchronous transmission.

4 is a view for explaining a reservation recording method according to the present invention, it will be described with reference to FIG.

The reservation recording information is input through the user interface 200 (step S400).

A method of inputting reservation recording information uses broadcast program information (eg, EPG (Electronic Program Guide)) included in MPEG2-TS. There are ATV-oriented reservation recording and HDVCR-oriented reservation recording. In the case of ATV-oriented reservation recording, the TS-DEMUX 105 of the ATV received by the ATV analyzes a transport stream packet to extract broadcast program information, and displays the extracted broadcast program information on the display unit 106. The user selects and reserves a desired program from the program information displayed on the display 106 through the user interface 200. The program selected by the user is sent to the HDVCR using control commands such as AV / C CTS or CAL. Even in the case of reservation recording centering on HDVCR, it is also transmitted by ATV and receives input by analyzing program information in MPEG2-TS received by HDVCR.

Save the input reservation recording information and drive the timer (step S402).

That is, the HDVCR receives the reservation information of the user and stores it in a memory (not shown) and simultaneously drives a timer or a time comparator (not shown). At this time, when the input of the reserved recording is completed, the power supplied to the ATV or the power supplied to the HDVCR may be turned off by the user. When the power off command is applied from the user, the virtual power is turned off (step S404). If there is no power off command, normal operation is performed.

In this case, when the power is turned off, power is supplied to a block necessary for performing some functions of the IEEE 1394 digital interface unit 104 and the microcomputer and other functions, but it is recognized as being turned off to the eyes of the user. Say.

It is determined whether the set reservation recording time is reached (step S406).

When the time specified by the timer or the time comparator is reached, power is supplied to the HDVCR, and the band and channel for MPEG2-TS transmission are allocated from the IRM (Isochronous Resource Manager) of the IEEE 1394 serial bus.

The power is turned on and the channel number is switched (step S408).

Authorize the ATV or STB to supply a power supply command using the control commands of the IEEE 1394 interface unit 104 and 202 and change the channel number of the tuner unit 100 through the IEEE 1394 interface unit 104 and 202. Send the control command. At this time, if power is already applied to the ATV (or STB), the power-on command is ignored and only the channel number switching command is performed.

When the power is applied and the channel is switched, the ATV or STB starts transmitting MPEG2-TS through the digital interface unit 104 or 202 (step S410).

The HDVCR selects and records a reserved program from a transport stream output from the ATV (or STB) through the digital interface unit 104 or 202 (step S412).

When the recording is completed, the rental width and the channel are returned to the asynchronous transmission method management layer, and the power supplied to the ATV (or STB) is restored to its original state (step S414).

As described above, according to the reservation recording apparatus of a digital video cassette recorder having no own tuner and a reservation recording method according to the present invention, a control command is transmitted through a digital interface unit without having its own tuner. It has the effect of making a scheduled recording using the tuner.

Claims (4)

In a reserved recording device of a digital video cassette recorder that does not have its own tuner, A digital television receiving a broadcast signal, generating a digital transport stream from the received broadcast signal, extracting and displaying broadcast program information included in the transport stream on a screen, and outputting the digital transport stream to the digital video cassette recorder. A receiver; Select a broadcast program to be reserved using the broadcast program information displayed on the screen of the digital television receiver, store information on the selected broadcast program, count the stored broadcast time, and when the time is reached, the digital program is broadcasted. Digital video that does not have its own tuner including a digital video cassette recorder which checks the power supplied to the television receiver and its own power supply, selects the reserved program from the transport stream output from the digital television receiver, and records it on a recording medium. Cassette Recorder Reservation Recording Device. 2. The digital recording of a digital video cassette recorder without a tuner as set forth in claim 1, wherein said digital television receiver and said digital video cassette recorder comprise respective digital interface units for mutually interfacing broadcast signals and control commands. Device. Digital broadcast signal using a digital video cassette recorder having a second digital interface unit without its own tuner, and a digital television receiver having a first digital interface unit for receiving a digital broadcast signal and communicating with the digital video cassette recorder. In the method for reservation recording, Inputting reservation recording information; Storing the input reservation recording information and driving a timer; Determining whether a broadcast time of the reserved broadcast program is reached; As a result of the determination, supplying power to the digital television receiver and the digital video cassette recorder when the scheduled time of the scheduled broadcast program arrives, and switching the broadcasting channel of the digital television receiver; Receiving a transport stream output from the digital television receiver; And A method of reservation recording of a digital video cassette recorder, which does not have its own tuner, comprising selecting and recording a reserved broadcast program from a received transport stream. The method of claim 3, wherein the step of inputting the reservation recording information Extracting and displaying broadcast program information included in the transport stream and selecting a broadcast program to be reserved from the displayed broadcast programs, thereby inputting reservation recording information. Reservation recording method.

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