KR100441539B1 - Apparatus for recording and replaying of image and method for recording of image - Google Patents

Abstract

Disclosed are a video recording and reproducing apparatus and a video recording method. In a video recording and reproducing apparatus for recording and reproducing a broadcast signal for a tuned channel, the flash memory stores channel information including at least one of a channel number and a channel broadcast name of a channel received from a tuner. The receiver receives a recording command signal. The control unit receives only channel information of the channel identification information of the broadcast signal except for the packet identifier of the broadcast signal and the packet identifier of the clock signal for synchronizing the video signal and the audio signal included in the broadcast signal. The tuner is controlled to receive only the packet identifier for the target channel. The hard disk stores a broadcast signal for a recording target channel received from the tuner when the recording start time comes. At this time, the controller receives the broadcast signal for the recording target channel using the packet identifier received when the recording start time comes and processes the received broadcast signal to be stored in the hard disk. Therefore, it is possible to prevent deterioration of storage area utilization and device performance of the flash memory.

Description

Apparatus for recording and replaying of image and method for recording of image}

The present invention relates to a video recording and reproducing apparatus and a video recording method, and more particularly, to a video recording and reproducing apparatus which can efficiently use a storage space of a storage medium by storing only predetermined data among channel identification information of a received broadcast signal. It is about video recording method.

With the recent rapid development of digital broadcasting technology, the personal video recorder (Hard Disk Driver), which uses a storage device such as a hard disk driver (HDD) as a video storage medium by integrating with computer technology. PVR "is in the spotlight.

The PVR is a set top box for digitally storing (that is, recording) a received broadcast signal, for example, a broadcast signal such as an airwave TV, a cable TV, or a satellite.

In order to move to a selected channel during video playback using such a PVR, channel identification information of a channel to be moved is identified and the channel is selected.

The channel identification information includes various channel information such as channel number, channel broadcast name, packet identifier of a broadcast signal for a channel (hereinafter referred to as "PID"), and synchronization of video and audio signals included in the broadcast signal. The PID of the clock signal (Program Clock Reference, hereinafter referred to as "PCR") is embedded.

In addition, when the reservation recording is set using the PVR, recording is possible only if channel identification information of a recording target channel is stored in the PVR. To this end, the PVR has a function of previously storing channel identification information of a recording target channel in a nonvolatile memory such as flash.

However, in the case of satellite broadcasting, the number of channels currently provided is hundreds, and among them, a memory for storing channel identification information by storing channel identification information for hundreds of channels in order to set up reservation recording for a desired channel. The required dose of is also increased. In addition, the conventional PVR takes a lot of time (scan time) to receive and store the channel identification information for a number of channels, which is provided as a factor that degrades the performance of the PVR.

An object of the present invention is to provide a video recording and reproducing apparatus and a video recording method for storing a predetermined data of the channel identification information of the broadcast signal to prevent deterioration of the storage area utilization and device performance of the memory.

1 is a block diagram showing a video recording and reproducing apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a flowchart illustrating a reservation recording method using the apparatus of FIG. 1.

Description of the main parts of the drawing

100: video recording and playback device 110: tuner

120: first storage unit 130: demultiplexer

140: decoder 150: DA converter

160: receiver 170: second storage unit

180: control unit

In order to solve the above technical problem, at least any one of a channel number and a channel broadcast name of the channel received from the tuner in the video recording and reproducing apparatus for recording and playing the broadcast signal for the selected channel according to the present invention; A first storage unit storing one channel information; A receiver which receives a recording command signal; Receiving only the channel information of the channel identification information of the broadcast signal except for the packet identifier of the broadcast signal and the packet identifier of the clock signal for synchronizing the video signal and the audio signal included in the broadcast signal, the recording command signal is A control unit which controls the tuner to receive only the packet identifier for a recording target channel when received; And a second storage unit which stores a broadcast signal for the recording target channel received from the tuner when the recording start time arrives, wherein the control unit uses the packet identifier received when the recording start time arrives. And a controller configured to receive the broadcast signal for a target channel and process the received broadcast signal to be stored in the second storage unit.

In more detail, the first storage unit is a flash memory device, and the second storage unit is a hard disk drive.

On the other hand, in the video recording method of the video recording and playback apparatus for recording and playing back the broadcast signal for the selected channel according to the present invention for solving the above technical problem, the channel number of the channel received from the tuner and Storing channel information including at least one of channel broadcast names in a flash memory; Receiving a recording command signal; Receiving a packet identifier of the broadcast signal and a clock signal for synchronizing a video signal and an audio signal included in the broadcast signal with respect to a recording target channel when the recording command signal is received; And receiving the broadcast signal for the recording target channel using the packet identifier received when the recording start time arrives and storing the broadcast signal on a hard disk.

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

1 is a block diagram showing a video recording and reproducing apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 1, the video recording and reproducing apparatus 100 according to the present invention includes a tuner 110, a first storage unit 120, a demultiplexer 130, a decoder 140, a D / A converter 150, The receiver 160, the second storage unit 170, and the controller 180 are provided.

The video recording and reproducing apparatus 100 according to the present invention is a PVR capable of recording and playing a desired broadcast signal without a separate video tape by using a built-in hard disk.

The PVR is a set top box capable of receiving digital signals and outputting them as analog signals based on MPEG technology and interfacing with an image display device (not shown) such as a TV.

The tuner 110 selects a channel set by a user from among a plurality of channels received through an antenna, for example, a plurality of channels included in an airwave TV, a cable TV, a satellite TV, and the like. In the present invention, a case of receiving, recording, and playing back satellite broadcasts will be described by way of example.

Among the plurality of channels provided in the satellite broadcast, the broadcast signal of the channel tuned by the tuner 110 is a compressed digital A / V (Audio / Video) signal. Although the present invention supports compression and decompression by Motion Pictures Experts Group-2 (MPEG-2), the compression method is preferably not limited to MPEG-2.

In addition, in the video recording and reproducing apparatus 100 according to the present invention, the tuner 110 receives not only a broadcast signal but also channel information among channel identification information for a plurality of channels. The channel identification information is a packet for distinguishing a plurality of channels received by the tuner 110.

In detail, the video recording and reproducing apparatus 100 according to the present invention stores channel identification information of a plurality of channels during the manufacturing process of the video recording and reproducing apparatus 100 or as required by a user.

The plurality of channels have channel identification information for identifying each channel. The channel identification information includes channel information consisting of a channel number, a channel broadcast name, and a PID of a PCR for synchronizing an audio / video signal / audio signal and a video signal.

Among them, PCR is used to synchronize the sound signal and the video signal in the recording and playback of the video recording and reproducing apparatus 100. Hereinafter, the "PID of an audio signal / video signal / PCR" will be referred to as "A / V / PCR PID".

Channel information received from the tuner 110 under the control of the controller 180 to be described later is stored in the first storage unit 120. The first storage unit 120 preferably uses a flash memory as a nonvolatile memory.

The demultiplexer 130 separates the A / V signal output from the tuner 110 into an audio signal and a video signal and outputs the audio signal to the decoder 140.

When a reproduction command signal for the tuned broadcast signal is received from an input unit (not shown) such as a remote controller included in the image display device (not shown), the demultiplexer 130 outputs the tuned broadcast signal to the decoder 140. .

The decoder 140 has an acoustic decoder 142 and an image decoder 144. The acoustic decoder 142 decodes the acoustic signal output from the demultiplexer 130. That is, the acoustic decoder 142 decompresses the acoustic signal by MPEG-2.

The video decoder 144 decodes the MPEG-2 video signal output from the demultiplexer 130. That is, the video decoder 144 decompresses the video signal by MPEG-2. At this time, the decompressed sound signal and video signal are digital signals.

The digital analog converter (DAC) 150 includes an acoustic DAC 152 and an image DAC 154.

The acoustic DAC 152 decompresses and outputs the digital acoustic signal decompressed from the acoustic decoder 142 into an analog acoustic signal such as YCbCr. The image DAC 154 decompresses the output from the image decoder 144 and converts the output digital image signal into an analog image signal.

In particular, the image DAC 154 is a type of MPEG-2 encoder and synchronizes an audio signal and a video signal using a predetermined frequency (eg, 27 MHz) clock of a PCR.

The broadcast signal converted from the DAC 150 into an analog signal is input to an image display device (not shown) and implemented as a viewable image.

The receiver 160 receives a user's selection command signal input from an input unit (not shown) provided in the image display device (not shown). That is, the input unit (not shown) is a user's selection command device such as a remote controller. The selection command signal preferably includes a channel selection signal, a recording command signal and a reproduction command signal.

On the other hand, during the playback of the tuned broadcast, if information about a reserved recording command signal, a recording target channel, a recording start time, a recording end time, and the like for a predetermined channel is received from an input unit (not shown) of a video display device (not shown), The tuner 110 receives the A / V / PCR PID for a predetermined recording target channel.

The A / V / PCR PID receives a digital broadcast signal of a recording target channel from a satellite and is used to extract the digital broadcast signal transmitted from the demultiplexer 130.

The received A / V / PCR PID is set in the video recording / reproducing apparatus 100 together with information on the recording target channel, recording start time and recording end time (inventor confirmation: different from 'set', 'stored' For example, where is the setting of the video recording / reproducing apparatus 100, or does it mean that the reception is continued until the recording start time is reached?

In detail, the A / V / PCR PID is continuously received from the satellite through the tuner 110 until the recording start time is reached and set in the video recording / reproducing apparatus 100. When the recording start time comes, the tuner 110 receives the digital broadcast signal for the recording target channel by using the A / V / PCR PID under the control of the controller 180. At this time, the received digital broadcast signal is a signal compressed by MPEG-2.

In addition, the demultiplexer 130 extracts the broadcast signal for the received recording target channel using the A / V / PCR PID and outputs it to the second storage unit 170. The second storage unit 170 stores the broadcast signal for the recording target channel, which means that the broadcast signal is recorded in the second storage unit 170. The second storage unit 170 preferably uses an HDD.

Meanwhile, when a play command signal for a stored broadcast signal is applied from an input unit (not shown) of the image display device (not shown), the decoder 140 detects the compressed digital broadcast signal from the second storage unit 170.

In detail, the audio decoder 142 detects and decompresses the compressed digital sound signal, and the video sound decoder 144 detects and decompresses the compressed video signal.

The decompressed sound signal and the video signal are input to the sound DAC 152 and the video DAC 154, respectively, and are converted into a viewable analog signal.

The controller 180 controls the overall operation of the video recording and reproducing apparatus 100 described above.

In particular, in the video recording and reproducing apparatus 100 according to the present invention, the controller 180 controls the tuner 110 to receive only channel information among channel identification information of the broadcast signal transmitted from the satellite.

In addition, when a recording command signal is applied from an input unit (not shown) of the image display apparatus (not shown), the controller 180 controls the tuner 110 to receive only the A / V / PCR PID for the recording target channel. At this time, the controller 180 checks the channel information of the recording target channel stored in the first storage unit 120 and controls the tuner 110 to receive channel information not stored in the first storage unit 120.

In addition, the controller 180 controls the tuner 110 to receive a digital broadcast signal for a recording target channel using the A / V / PCR PID received from the tuner 110 when the recording start time comes.

In addition, the controller 180 controls the demultiplexer 130 so that the demultiplexer 130 extracts a broadcast signal for a channel to be recorded using the received A / V / PCR PID.

In addition, the controller 180 controls the second storage unit 170 to store the broadcast signal extracted from the demultiplexer 130 in the second storage unit 170.

FIG. 2 is a flowchart illustrating a reservation recording method using the apparatus of FIG. 1.

Referring to FIG. 2, the tuner 110 of the video recording and reproducing apparatus 100 according to the present invention receives only channel information among channel identification information for a plurality of channels (S210). The channel information is composed of a plurality of pieces of information such as a channel number for distinguishing channels and a channel broadcast name. Channel information of each received channel is pre-stored in the first storage unit 120 such as a flash (S220).

When a reserved recording command signal is applied from an input unit (not shown) of an image display device (not shown) (S230), the tuner 110 receives A / V / PCR PID among channel identification information for a recording target channel (S240). ). The A / V / PCR PID is a packet identifier of an audio signal / video signal / synchronization signal.

When the recording start time is set by the input unit (not shown) (S250), the tuner 110 receives a broadcast signal for the recording target channel using the received A / V / PCR PID (S260). The broadcast signal received at this time is a digital signal compressed by MPEG-2.

The received broadcast signal is stored in the second storage unit 170 in a compressed state (S270). This completes the recording of the broadcast signal for the recording target channel.

In addition, if the recording start time before the step S250, the tuner 110 receives the A / V / PCR PID until the recording start time (S240).

According to the video recording and reproducing apparatus and the video recording method using the hard disk according to the present invention, the space utilization of the memory can be improved by storing only channel information such as channel number among the channel identification information for identifying a plurality of channels. In addition, the time required to receive and store the channel identification information can be reduced by receiving only the channel information from which the packet identifier of the video signal, the sound signal, and the synchronization signal is removed. As a result, the performance of the device is also improved.

Although the present invention has been described in detail with reference to the exemplary embodiments above, those skilled in the art will understand that various modifications are possible within the scope of the present invention without departing from the scope of the present invention. will be. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be defined by the claims below and equivalents thereof.

Claims (4)

An image recording and reproducing apparatus for recording and playing back a broadcast signal for a tuned channel, A first storage unit for storing channel information including at least one of a channel number and a channel broadcast name of the channel received from the tuner; A receiver which receives a recording command signal; Receiving only the channel information of the channel identification information of the broadcast signal except for the packet identifier of the broadcast signal and the packet identifier of the clock signal for synchronizing the video signal and the audio signal included in the broadcast signal, the recording command signal is A control unit which controls the tuner to receive only the packet identifier for a recording target channel when received; And And a second storage unit storing a broadcast signal for the recording target channel received from the tuner when the recording start time comes. And the controller is configured to receive the broadcast signal for the recording target channel by using the packet identifier received when the recording start time arrives and to store the broadcast signal in the second storage unit. Playback device. The method of claim 1, And the first storage unit is a flash memory device. The method of claim 1, And the second storage unit is a hard disk drive. A video recording method of a video recording / reproducing apparatus for recording and playing back a broadcast signal for a tuned channel, Storing channel information including at least one of a channel number and a channel broadcast name of the channel received from the tuner in a flash memory; Receiving a recording command signal; Receiving a packet identifier of the broadcast signal and a clock signal for synchronizing a video signal and an audio signal included in the broadcast signal with respect to a recording target channel when the recording command signal is received; And receiving the broadcast signal for the recording target channel using the packet identifier received when the recording start time arrives, and storing the broadcast signal in a hard disk.