KR20030040602A - Method and apparatus for reproducting audio/video data in digital TV system - Google Patents

Abstract

PURPOSE: An apparatus for reproducing audio/video data of a digital TV system and a method thereof are provided to store the presently received data while displaying the stored data, and watch the presently received media data in real time by displaying time shifted data at high speed. CONSTITUTION: If a signal requesting a time shift is received while a decoded digital broadcasting signal is being reproduced, the presently received digital broadcasting signal is stored at a memory(S101-105). If a time shift reproducing signal is inputted while the received digital broadcasting signal is stored at the memory, it is judged whether the input time shift reproducing signal is a high speed reproducing key input signal(S106-S107). If so, the digital broadcasting signal stored at the memory after being time shifted is reproduced at a set rate(S108). It is judged whether broadcasting data stored at the memory exists(S109). If not, the presently receiving digital broadcasting data is displayed in real time(S110).

Description

Audio / video data reproducing apparatus and method of digital TV system {Method and apparatus for reproducting audio / video data in digital TV system}

The present invention relates to an audio / video data reproducing apparatus of a digital TV system and a method thereof.

Currently, digital TV broadcasting includes digital satellite broadcasting through satellites and terrestrial digital broadcasting using terrestrial waves, and cable digital broadcasting is also being implemented.

Digital TV, which is under development these days, receives analog broadcast signal and digital broadcast signal, performs predetermined data processing, displays restored image on the screen, and can process analog broadcast signal while aiming for complete digitalization of the system. System to ensure that In addition, according to the trend toward larger and more versatile TV screens, a realism of the screen can be increased, and a TV having a 16: 9 aspect ratio that meets the aspect ratio of a wide screen is commercially available.

In such a general digital TV system, a received input signal is decoded and then reproduced, and reproduction and storage of the received data are provided in an independent form. That is, a function of storing media data, i.e., audio / video data and a function of displaying the stored data while viewing a digital TV at the request (input) of the user is performed independently. Therefore, there is a problem that it is cumbersome and time consuming to replay the stored data after watching the stored data.

Accordingly, the present invention is a method for solving the above-mentioned problems according to the prior art, an object of the present invention is to store audio / video data received from a request point by a user's request in a digital TV system, After the elapsed time, the data stored by the user's request is displayed in the form of time shifted (time shifted), and the presently received data can be stored to provide convenience to the user. Disclosed is an audio / video data reproducing apparatus and method of a digital TV system capable of viewing a currently received media data in real time in a short time.

1 is a schematic block diagram of an audio / video data reproducing apparatus of a digital TV system according to the present invention;

2 is a flowchart illustrating an operation of a method for reproducing audio / video data of a digital TV system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: Tuner 20: A / D converter

30: decoding unit 40: display unit

50: key input unit 60: control unit

70: storage unit

According to one aspect of the audio / video data reproduction method of the digital TV system according to the present invention for achieving the above object, if a signal for requesting time shift is received while the decoded digital broadcast signal is being reproduced, the currently received digital Storing the broadcast signal in a memory; Determining whether the inputted reproduction signal is a high speed reproduction key input signal when a time shift reproduction signal is input while storing the received digital broadcast signal in a memory; Reproducing the previous digital broadcast signal time-shifted and stored in the memory at a set reproduction speed when determined as a fast reproduction key input signal; Determining whether broadcast data stored in the memory exists during the high speed playback; If there is no broadcast data in the memory, displaying the currently received digital broadcast data in real time.

In the storing of the currently received digital broadcast signal in a memory, the currently received digital broadcast signal is stored in the memory and displayed on the screen.

In the determining of whether the fast playback key input signal is input, in the case of the normal speed playback key input signal, the time-shifted broadcast data stored in the memory is reproduced at the same speed as the playback speed in real time and is currently received digitally. Sequentially storing broadcast signals in the memory; If the time shift release key input signal is received during playback, stopping the storing operation of the currently received digital broadcast signal and playing back the image on the screen in real time.

In the storing of the currently received digital broadcast signal in a memory, the digital broadcast signal stored in the memory may include at least one of broadcast data in a compressed state and decoded broadcast data.

On the other hand, according to one aspect of the audio / video data reproduction apparatus of the digital TV system according to the present invention, a decoding unit for decoding the received digital broadcast signal to provide to the display device; A key input unit for providing a plurality of key input signals for performing a time shift function during broadcast signal reproduction; A storage unit which stores digital broadcast data currently received; a) when a key input signal for requesting a time shift is received through the key input unit, a digital broadcast signal currently received is stored in the storage unit, and a time shift is performed through the key input unit while the digital broadcast signal is stored in the memory. When a high speed playback signal is input, a previous digital broadcast signal time-shifted and stored in the storage unit is provided to the display apparatus at a set reproduction speed, and b) when there is no broadcast data stored in the storage unit during the high speed playback. And a controller for controlling the digital broadcast data currently being received to be displayed on the display device in real time.

Meanwhile, in order to perform the audio / video data reproduction method of a digital TV system, a program of instructions that can be executed by a digital processing apparatus is tangibly embodied, and according to an aspect of a recording medium that can be read by a digital processing apparatus. If the signal for requesting time shift is received while the decoded digital broadcast signal is being reproduced, storing the currently received digital broadcast signal; Determining whether the inputted reproduction signal is a high speed reproduction key input signal when a time shift reproduction signal is input during digital broadcast signal memory storage; Reproducing the previously shifted and stored digital broadcast signal at a set reproduction speed when determined as a fast reproduction key input signal; Determining whether the stored broadcast data is present during the fast playback; If the stored broadcast data does not exist, performing the step of displaying the currently received digital broadcast data in real time.

Hereinafter, a preferred embodiment of an audio / video data reproducing apparatus and method thereof of a digital TV system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an audio / video data reproducing apparatus of a digital TV system according to the present invention. As shown in FIG. 1, a tuner 10, an A / D converter 20, and a decoder ( 30, the display unit 40, the key input unit 50, the control unit 60, and the storage unit 70.

The tuner 10 receives a broadcast signal received through a channel selected by a user among analog multicast signals received through an antenna.

The A / D converter 20 converts an analog broadcast signal of one channel received by the tuner 10 into a digital signal, and then provides the converted digital broadcast signal to the decoder 30. Here, the A / D converter 20 is a VSB (Vestigial Side Band) decoder.

The decoding unit 30 decodes the digital broadcast data converted by the A / D converter 20, and then decoded broadcast data, that is, audio data through a voice output device and video data through the display unit 40. Will play through. Here, the display unit 40 may be a TV monitor, a PC, or the like.

The key input unit 50 provides a key input signal for performing or releasing a time shift function to the controller 60 and may include both a wired and a wireless key input unit. Here, the time shift function means that the video / audio data that the user cannot watch while watching TV is stored on a recording medium, and can be played back and watched at a desired time, and currently received while storing the media data on the recording medium. The broadcast signal may be displayed as it is, or the display may be blocked. In addition, when the media data stored in the recording medium is played back, it is possible to play back at the same speed as the normal broadcast data playback speed or at a high speed (for example, 1.5 times and 2 times). If playback is performed at high speed, after a certain period of time, depending on the playback speed, the current time and the completion of playback of the media data stored on the recording medium reach a point in time so that the currently received broadcast signal can be automatically viewed in real time. It is.

However, when the playback speed of the media data stored on the recording medium is a normal playback speed, the media data stored on the recording medium is continuously time-shifted so that the user can watch a broadcast signal that has elapsed for a predetermined time instead of real time.

When the time shift key input signal is input from the user through the key input unit 50, the control unit 60 may receive the current digital signal, that is, the compressed digital broadcast data or the decoding unit 30 that is input to the decoding unit 30. The decoded broadcast data is to be stored in the storage unit 70.

In addition, the control unit 60 controls the time-shifted media stored in the storage unit 70 when the time shift display key input signal is provided through the key input unit 50, and when the key input signal is a high speed playback key input signal. The data is read and provided to the decoding unit 30, and the decoding unit 30 reproduces the provided media data at high speed and displays it on the display unit 40, and simultaneously stores the currently received media data on the recording medium, that is, the storage unit. It will be recorded sequentially at (70).

On the contrary, when the key input signal is not a high-speed display key input signal and is a normal display key input signal, media data stored in the storage unit 70 is read and reproduced on the display unit 40 through the decoding unit 30. will be. In this case as well, the media broadcast data currently received is continuously stored in the storage unit 70. In this case, in the case of the normal speed display, the media data displayed on the display unit 40 continuously displays only the media data shifted for a predetermined time.

The storage unit 70 may store the compressed media data received from the corresponding time point according to the time shift key input signal of the key input unit 50, or may store the decoded media data through the decoding unit 30.

The operation of the audio / video data reproducing apparatus of the digital TV system according to the present invention having such a configuration will be described.

First, when an analog broadcast signal of a channel selected by a user is received through the tuner 10, the received analog broadcast signal is converted into digital broadcast data through the A / D converter 20.

The converted digital broadcast data is displayed on the display unit 40 through the decoding unit 30. When the user provides the time shift key input signal through the key input unit 50 while the media data is displayed, the controller 60 receives the compressed broadcast input to the decoder 30 from the time point at which the key input signal is provided. The data will be stored in the storage unit 70. In this case, the broadcast data may be stored in the storage unit 70 and the broadcast data may be decoded through the decoder 30 and displayed on the display unit 40. In addition, the broadcast data stored in the storage unit 70 may be compressed broadcast data, but may also be data decoded through the decoding unit 30.

When a predetermined time has elapsed while broadcasting data for performing the time shift function is stored in the storage unit 70, a time shift display key input signal is provided from the user through the key input unit 50. The control unit 60 blocks the display of the currently received broadcast data, reads the broadcast data stored in the storage unit 70, and sequentially displays the broadcast data on the display unit 40 through the decoding unit 30. As a result, the broadcast data displayed on the display unit 40 is elapsed for a predetermined time, that is, time shifted data is displayed. In this case, the broadcast signal received while the time shifted broadcast data stored in the storage unit 70 is displayed is continuously displayed in the display unit 40 while being stored in the compressed state or decoded state in the storage unit 70. will be.

When the time-shifted data is displayed and the user requests a high-speed display when the user inputs the time-shifted display key input signal to the controller 60, the controller 60 transmits the time-shifted broadcast stored in the storage 70. The data is reproduced to the display unit 40 at high speed through the decoding unit 30. Here, the high speed may be 1.5 times speed, 2 times speed or more. In this case of high speed reproduction, the current broadcast data received within the reproduction time is stored in the storage unit 70. At this time, since the reproduction time is more than a predetermined speed, the data stored in the storage unit 70 and the reproduction data will match after a predetermined time elapses. When the data received in this way and the data stored in the storage unit equally match, the currently received data is reproduced at the normal speed.

As a result, the controller 60 checks the storage unit 70 while the time-shifted data stored in the storage unit 70 is reproduced at high speed, and when there is no data stored in the storage unit 70 (received broadcast). When data and the currently reproduced data coincide with each other, the currently received broadcast data is not stored in the storage unit 70 but is reproduced at the normal speed on the display unit 40 through the decoding unit 30.

On the other hand, when the user requests reproduction at the normal speed instead of the high speed to display the time-shifted broadcast data through the key input unit 50, the user can play the time-shifted broadcast data stored in the storage unit 70 at the normal speed. do. At this time, the current broadcast data received while reproducing the broadcast data stored in the storage unit 70 is continuously stored in the storage unit 70 sequentially.

When the broadcast data stored in the storage unit is reproduced at the normal speed, only the time shifted broadcast data is continuously reproduced. Therefore, viewers cannot watch the broadcast in real time. Here, when the user wants to watch a broadcast in real time, the user may input a time shift release signal through the key input unit 50. When the time shift release signal is input, the control unit 60 stores the time shift stored in the storage unit 70. The reproduction of the broadcast data is blocked, and the currently received broadcast data is controlled to be displayed on the display unit 40 through the decoding unit 30. Thus, the viewer can watch the real-time data.

The audio / video data reproducing method of the digital TV system according to the present invention corresponding to the operation of the audio / video data reproducing apparatus of the digital TV system according to the present invention as described above will be described step by step with reference to FIG. Let's do it.

2 is a flowchart illustrating an operation of a method of reproducing audio / video data of a digital TV system according to the present invention.

First, when a digital broadcast signal is received (S101), the received digital broadcast signal is MPEG decoded (S102).

The digital broadcast signal (audio / video data) thus decoded is displayed on the display apparatus (S103).

While the media data is displayed, the user determines whether a time shift function key signal is input through the key input unit (S104).

As a result of the determination, when the time shift function key signal is input, the compressed broadcast data input from the time point at which the corresponding signal is provided is stored in the memory (S105). In this case, the broadcast data may be stored in the memory and the corresponding broadcast data may be displayed on the display device. In addition, the broadcast data stored in the memory may be compressed broadcast data but may be data decoded through a decoding apparatus.

After a predetermined time has elapsed while the broadcast data for performing the time shift function is stored in the memory, it is determined whether a time shift display key input signal is input from the user (S106).

As a result of the determination, when the time shift display function key input signal is input, it is determined whether the function key input signal is a key input signal for high speed reproduction (S107).

If the high-speed display key input signal, the time-shifted broadcast data stored in the memory is reproduced on the display device at high speed. Here, the high speed may be 1.5 times speed, 2 times speed or more. In the case of the high speed reproduction, the current broadcast data received within the reproduction time is stored in the memory (S108). At this time, since the playback time is more than a certain speed, the data stored in the memory and the playback data will match after a predetermined time. When the data received in this way and the data stored in the storage unit equally match, the currently received data is reproduced at the normal speed.

As a result, the time-shifted data stored in the memory is checked during the high speed reproduction to determine whether the stored data exists (S109). As a result of the determination, when there is no data stored in the memory (when the received broadcast data and the currently reproduced data coincide), the broadcast data currently received is not stored in the memory and is decoded immediately so that the display device can reproduce the data at a normal speed. Will be (S110).

However, when the reproduction of the time-shifted broadcast data is requested at the normal speed instead of the high speed in step S107, the time-shifted broadcast data stored in the memory is reproduced at the normal speed (S111). At this time, the current broadcast data received while reproducing the broadcast data stored in the memory is continuously stored in the memory sequentially.

When the broadcast data stored in the memory is reproduced at the normal speed in this manner, only the time shifted broadcast data is reproduced continuously. Therefore, viewers cannot watch the broadcast in real time. In operation S112, the user determines whether a time shift release key input signal for viewing a broadcast is input in real time.

As a result of determination, when the time shift release key input signal is input, the reproduction of the time shifted broadcast data stored in the memory is interrupted, and the currently received broadcast data is blocked from being stored in the memory (S113). The received broadcast data is decoded and displayed on the display device in real time.

As a result, the audio / video data reproducing apparatus and method thereof of the digital TV system according to the present invention, when a time shift request signal is received from the user while reproducing the digital broadcast signal received in the digital TV system, currently received broadcast data Can be stored in the memory and played back at the point where the user wants to watch. At this time, in re-watching, the broadcast data that is stored, that is, time shifted and received within the time of reproducing the previous broadcast data stored in the memory, is continuously stored in the memory.

On the other hand, if the user requests high-speed playback when playing time-shifted data, the playback is performed at a higher speed than the normal speed, and the playback is performed at a high speed, so that after a predetermined time has elapsed, it matches the current broadcast data received in real time. In this case, the high speed playback mode is switched to the normal playback mode so that broadcast data can be viewed in real time.

In addition, in the case of requesting reproduction at a normal speed rather than high-speed reproduction, the user can continuously watch only time-shifted broadcast data unless a release signal is input. Therefore, while the time-shifted broadcast data is reproduced at a normal speed, the release signal may be input at a desired time to watch the currently received broadcast data in real time.

The audio / video data reproducing apparatus and method of the digital TV system according to the present invention as described above store the audio / video data received from the request point at the request of the user in the digital TV system, and after the predetermined time has elapsed, It is possible to provide convenience to the user by storing the currently received data while displaying the stored data in the form of time shifted (time shifted) data at the request of the user. By allowing the media data to be viewed in real time in a short time, there is an advantage of reducing the time loss of the user.

Claims (8)

In the broadcast signal reproduction method of the digital TV system, If a signal requesting time shift is received while the decoded digital broadcast signal is being reproduced, storing the currently received digital broadcast signal in a memory; Determining whether the inputted reproduction signal is a high speed reproduction key input signal when a time shift reproduction signal is input while storing the received digital broadcast signal in a memory; Reproducing the previous digital broadcast signal time-shifted and stored in the memory at a set reproduction speed when determined as a fast reproduction key input signal; Determining whether broadcast data stored in the memory exists during the high speed playback; If the broadcast data does not exist in the memory, displaying digital broadcast data currently received in real time. The method of claim 1, In the step of storing the currently received digital broadcast signal in a memory, The digital broadcast signal currently received is stored in the memory and displayed on the screen at the same time audio / video data reproduction method of a digital TV system. The method of claim 1, Determining whether the fast playback key is input; In the case of the normal speed reproduction key input signal, reproducing the time-shifted broadcast data stored in the memory at the same speed as that of the real-time reproduction and simultaneously storing the currently received digital broadcast signal in the memory; If the time shift release key input signal is received during playback, stopping the operation of storing the currently received digital broadcast signal, and reproducing the audio / video data of the digital TV system. The method of claim 1, In the step of storing the currently received digital broadcast signal in a memory, The digital broadcast signal stored in the memory is at least one of broadcast data and decoded broadcast data in a compressed state, the audio / video data reproduction method of a digital TV system. In the broadcast signal reproduction apparatus of the digital TV system comprising a display device, A decoding unit for decoding the received digital broadcast signal and providing the same to the display apparatus; A key input unit for providing a plurality of key input signals for performing a time shift function during broadcast signal reproduction; A storage unit which stores digital broadcast data currently received; a) when a key input signal for requesting a time shift is received through the key input unit, a digital broadcast signal currently received is stored in the storage unit, and a time shift is performed through the key input unit while the digital broadcast signal is stored in the memory. When a high speed playback signal is input, the digital broadcasting signal, which is time shifted and stored in the storage unit, is provided to the display device at a set playback speed. b) audio / video data of a digital TV system including a control unit for controlling digital display data to be displayed on the display device in real time when there is no broadcast data stored in the storage unit during the high speed playback. Playback device. The method of claim 5, And digital broadcast data stored in the storage unit is at least one of broadcast data in a compressed state and broadcast data decoded through the decoding unit. The method of claim 5, The control unit, a) When the normal speed reproduction key input signal is received from the key input unit, the time shifted broadcast data stored in the storage unit is reproduced at the same speed as that of the real time reproduction and the digital broadcast signal currently received is stored. Save it as wealth, b) when the time shift release key input signal is received during playback, stopping the storing operation of the currently received digital broadcast signal and reproducing it on a screen in real time. In the recording medium that can be read by the digital processing device, a program of instructions that can be executed by the digital processing device is tangibly implemented to perform the audio / video data reproducing method of the digital TV system. If a signal requesting time shift is received while the decoded digital broadcast signal is being reproduced, storing the currently received digital broadcast signal; Determining whether the inputted reproduction signal is a high speed reproduction key input signal when a time shift reproduction signal is input during digital broadcast signal memory storage; Reproducing the previously shifted and stored digital broadcast signal at a set reproduction speed when determined as a fast reproduction key input signal; Determining whether the stored broadcast data is present during the fast playback; And if the stored broadcast data does not exist, displaying the currently received digital broadcast data in real time.