KR200404774Y1 - Apparatus for receiving broadcasting signal - Google Patents

Abstract

The present invention provides a broadcast signal receiving apparatus capable of viewing a broadcast signal in real time and re-watching the broadcast signal that was previously received and viewed according to a user's request.

The present invention stores a stream in which the tuner receives and outputs a broadcast signal in a buffer for a predetermined time, and the control unit controls the buffer according to a user's operation command input through the user interface unit so that the buffer currently stores or transfers the stream. Output the stream stored in time. The stream processing unit processes the current stream or the previous time stream output by the buffer so that the user can watch.

Therefore, the user can selectively watch the current stream or the previous time stream which the tuner receives and outputs the current broadcast signal according to his / her choice, and if the user misses the important scene, it is recommended to immediately re-watch the important scene. It is possible.

Description

Apparatus for receiving broadcasting signal

The present invention relates to a broadcast signal receiving apparatus for receiving broadcast signals such as digital audio broadcasting (DAB) or digital multi broadcasting (DMB) signals.

More particularly, the present invention relates to a broadcast signal receiving apparatus that enables to view a received DAB or DMB broadcast signal in real time, and to re-view a broadcast signal that was previously received and viewed according to a user's request.

Digital broadcasting such as DAB or DMB has high speed as well as various additional data services such as CD (Compact Disk) high quality audio service, traffic and securities, etc., compared to AM (Amplitude Modulation) or FM (Frequency Modulation) broadcasting. It is expected to be spotlighted as a new mobile multimedia service device as well as a replacement for AM and FM broadcasts as a multimedia broadcast that can provide a vivid quality video service anytime and anywhere with a screen of less than 7 inches even in the situation of moving to.

According to this trend, users will have more time to access voice and video media through DAB or DMB. Accordingly, a request for a service that can be intuitively felt by consumers for a broadcast signal receiver that receives DAB or DMB signals will be increased. This is expected to be frequent.

The conventional broadcast signal receiving apparatus includes a tuner unit to receive a DAB or DMB signal, and output an audio stream of the received DAB signal or an AV (Audio and Video) stream of the received DMB signal.

A storage device is provided to store an audio stream of a DAB signal output from the tuner unit or an audio and video (AV) stream of a received DMB signal.

When the signal output from the tuner is an audio stream of a DAB signal, an audio decoder decodes the audio stream, and the audio output unit processes and outputs the decoded signal so that the user can listen to the audio signal at the CD level.

When the signal output from the tuner is an AV stream of a DMB signal, a demultiplexer is provided to separate the AV stream into an audio stream and a video stream. The separated audio stream and the video stream are respectively decoded by the audio decoder and the video decoder, and the decoded signal is processed by the audio output unit and the video output unit, respectively, and outputted so that the user can watch.

The conventional broadcast signal receiving apparatus receives a DAB or DMB signal broadcasted by a broadcasting station in real time so that a user can view it. However, if the internal delay occurs in the state of processing the DAB or DMB signal in real time and the stream outputted from the tuner cannot be processed in time, an overflow phenomenon occurs. On the contrary, the tuner receives the broadcast signal to receive the stream. Failure to procure on time will result in underflow. The overflow phenomenon or the underflow phenomenon causes many obstacles in watching the broadcast signal in real time.

The storage device stores the stream output from the tuner unit in the form of a file in a local storage space when the user commands an immediate recording or a scheduled recording, and the tuner unit when the user commands recording and viewing at the same time. The output stream is duplicated and one is stored in a storage device, and the other is processed and output for viewing by a user.

However, since the conventional broadcast signal receiver as described above is based on real-time processing, the user can watch or record the broadcast signal received by the tuner in real time. However, when a user watches a broadcast signal, a user misses a scene that is important, for example, a goal scoring scene or a scene passing through a finish line in various sports events. In this case, the user wants to watch the scenes he has just watched again.

However, in the related art, only the real time processing is performed as described above, and thus, a service for re-viewing the scenes viewed immediately before could not be provided. And if you watch while recording the stream output from the tuner unit using the storage device, you can not watch immediately before, you can watch the missed scenes again, but in this case, you cannot watch the missed scenes immediately, and watch after the recording is completed There are various problems, such as the user does not feel the liveliness because you need to find and replay the missing parts.

An object of the present invention is to provide a broadcast signal receiving apparatus capable of viewing a broadcast signal received in real time and of replaying scenes that the user has just watched.

The present invention having the above object, the control unit for controlling the reception of the broadcast signal, the control unit for controlling the real-time viewing of the received broadcast signal, the re-view of the previously viewed broadcast signal, and receiving the broadcast signal under the control of the control unit A buffer for outputting a stream; a stream for storing the stream output by the tuner; a buffer for outputting a stream currently stored or a stream stored at a previous time under control of the controller; Characterized in that it comprises a stream processing unit for processing the stream.

In another aspect, the present invention provides a storage device for storing and outputting the stream, a first switch for selecting and inputting a stream output from the tuner unit or the buffer while being switched under the control of the controller, And a second switch configured to input a stream output from the storage device or the buffer to the stream processor while being switched under control.

The tuner unit receives a DMB (Digital Multi Broadcasting) signal and outputs an AV stream, and the stream processing unit separates an input AV stream into an audio stream and a video stream, and an audio stream and a video stream separated by the demultiplexer. An audio decoder and a video decoder for decoding and outputting an audio signal and a video signal, respectively, and an audio output unit and a video for processing an audio signal and a video signal output by the audio decoder and the video decoder so that a user can watch an AV signal. It is characterized by consisting of an output unit.

The tuner unit receives a DAB (Digital Audio Broadcasting) signal and outputs an audio stream, and the stream processor decodes an input audio stream to output an audio signal, and processes an audio signal output by the audio decoder. And an audio output unit for allowing a user to listen to the audio signal.

The buffer may vary in capacity for storing a stream under control of the controller.

Hereinafter, a broadcast signal receiving apparatus of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a broadcast signal receiving apparatus of the present invention. Here, reference numeral 100 denotes a control unit for receiving a broadcast signal. The controller 100 controls the reception of the broadcast signal, and also controls the storage of the received broadcast signal and real time viewing. In addition, the controller 100 controls the re-viewing of the broadcast signal viewed immediately before.

Reference numeral 110 is a user interface unit. As illustrated in FIG. 2, the user interface 110 includes a display window 200 and a command input unit 210. The command input unit 210 has a re-view key 211, a watch key 213, a stop key 215, and a scroll key 217 for scrolling the re-view time for commanding the re-view of the broadcast signal viewed immediately before. And a variety of function keys, and the like, and generate a corresponding operation command to the controller 100 as the user manipulates the function key.

Reference numeral 120 is a tuner section. The tuner 120 receives, for example, a DMB signal, and outputs an AV stream of the received DMB signal.

Reference numeral 130 is a buffer. The storage capacity of the buffer 130 is variable according to the control of the controller 100. In addition, the buffer 130 stores the AV stream output by the tuner 120 for a time set according to a variable storage capacity. In addition, the buffer 130 outputs an AV stream input from the tuner 120 in real time or outputs an AV stream of a previous time stored under the control of the controller 100.

Reference numeral 140 is a first switch. The first switch 140 switches and selects the AV stream output from the tuner unit 120 or the AV stream output from the buffer 130 under the control of the controller 100.

Reference numeral 150 is a storage device. The storage device 150 stores and outputs an AV stream selected by the first switch 140 under the control of the controller 100.

Reference numeral 160 is a second switch. The second switch 160 switches and selects an AV stream output from the buffer 130 or an AV stream output from the storage device 150 under the control of the controller 100.

Reference numeral 170 is a stream processing unit. The stream processor 170 includes a demultiplexer 171, an audio decoder 173, a video decoder 175, an audio output unit 177, and a video output unit 179.

The demultiplexer 171 switches the AV stream selected by the second switch 160 into an audio stream and a video stream.

The audio decoder 173 and the video decoder 175 decode the audio stream and the video stream separated by the demultiplexer 171, respectively, and output an audio signal and a video signal.

The audio output unit 177 and the video output unit 179 process the audio signal and the video signal output by the audio decoder 173 and the video decoder 175, respectively, so that the user can watch the AV signal.

The broadcast signal receiving apparatus of the present invention having such a configuration first sets a capacity for storing an AV stream in the buffer 130. That is, when the user manipulates the user interface unit 110 to set the storage capacity, the controller 100 may buffer the display window 200 of the user interface 110, for example, as shown in FIG. 3. A storage capacity setting screen of 130 is displayed.

In this state, the user sets a time for storing the AV stream in the buffer 130. For example, 5 seconds is set as the time for storing the AV stream in the buffer 130. Then, the controller 100 sets an area of the buffer 130 that can store the AV stream for a time of 5 seconds.

In this state, when the user operates the user interface 110 to command reception of the DMB signal, the controller 100 controls the tuner 120 to receive the DMB signal and output the AV stream.

The tuner 120 is stored in the output buffer 130 and is input to the demultiplexer 171 of the stream processor 170 through the second switch 160 to be divided into an audio stream and a video stream, and the separated audio stream. The video stream is decoded by the audio decoder 173 and the video decoder 175, respectively, and is processed after being processed by the audio output unit 177 and the video output unit 179 so that the user can watch the AV signal.

In this state, when the user presses the re-view key 211 of the user interface 110, the controller 100 controls the buffer 130 to output the AV stream stored at the previous time. For example, assuming that the storage capacity of the buffer 130 is set to store 5 seconds of AV stream, the controller 100 controls the buffer 130 to output the AV stream stored 5 seconds ago. .

The AV stream stored at the previous time output by the buffer 130 is input to the stream processing unit 170 through the second switch 160, processed, and then output, so that the user can watch the AV signal at the previous time.

The buffer 130 delivers the AV stream stored at the previous time to the second switch 160 and continuously delivers the current AV stream input from the tuner 120, so that the user can stop the AV stream delayed for a predetermined time without interruption. You can watch the signal.

In this state, when the user presses the re-view key 211 of the user interface 110 again, the controller 100 controls the buffer 130 to immediately output the current stream input from the tuner 120. Toggle operation, so that the user can watch the AV signal of the current stream.

In addition, when the user moves the scroll key 217 of the user interface 110 to the left and right, the control unit 100 of the previous time stored in the buffer 130 according to the position to move the scroll key 217 to the left and right. Control to output while varying the AV stream. For example, assuming that the storage capacity of the buffer 130 is set to store an AV stream of 5 seconds, the AV stream stored 0 to 5 seconds before the scroll key 217 is moved to the left or right. The AV stream stored 0 to 5 seconds before the buffer 130 is output to the stream processing unit 170 through the second switch 160 is processed and output after being output to the user. You can watch it.

When the user manipulates the user interface unit 110 to store the AV stream, the controller 100 controls the storage device 150 to store the AV stream. At this time, the controller according to the user's selection The storage device 150 selectively stores the current AV stream output from the tuner unit 120 or the AV stream output from the buffer 130 by switching the first switch 140.

When the user manipulates the user interface 110 to command playback of the AV stream, the controller 100 controls the storage device 150 to output the stored AV stream, and controls the second switch 160. Select the AV stream output from the storage device 150.

Then, the AV stream output from the storage device 150 is input to the stream processing unit 170 through the second switch 160, processed, and then output, and the user outputs the AV signal of the AV stream stored in the storage device 150. You can watch it.

On the other hand, while the invention has been shown and described in relation to a specific preferred embodiment, the invention is variously modified without departing from the spirit or field of the invention provided by the following utility model registration claims And one of ordinary skill in the art that the present invention can be changed. That is, in the above description, the tuner 120 receives the DMB signal and outputs an AV stream. In the present invention, the present invention is not limited thereto, and when the tuner 120 receives the DAB signal and outputs an audio stream, the demultiplexer 171, the video decoder 175, and the video output unit ( 179 may be provided, and only the audio decoder 173 and the audio output unit 177 may be configured to process the audio stream output by the tuner unit 120.

As described in detail above, the present invention may store a AV stream of a broadcast signal for a predetermined time and provide a service that allows a user to revisit important scenes that have not been viewed. In addition, by varying the capacity of the buffer for storing the AV stream, it is possible to flexibly secure the storage capacity required by the controller to perform a predetermined operation. In addition, the present invention can secure abundant data storage capacity, which can significantly reduce the possibility of errors due to buffer overflow or underflow.

1 is a block diagram showing the configuration of a broadcast signal receiving apparatus of the present invention.

2 is a view showing an example of the configuration of the user interface unit in the broadcast signal receiving apparatus of the present invention.

3 is a view for explaining an operation of adjusting the storage capacity of the buffer in the broadcast signal receiving apparatus of the present invention.

Claims (5)

A control unit controlling reception of a broadcast signal and controlling real-time viewing of the received broadcast signal and re-viewing of the previously viewed broadcast signal; A tuner unit for receiving a broadcast signal and outputting a stream under control of the controller; A buffer for storing the stream output by the tuner unit and outputting a stream currently stored or a stream stored at a previous time under the control of the controller; And And a stream processor for processing a stream output from the buffer or a previous stream. The method of claim 1, A storage device for storing and outputting the stream; A first switch which is switched under the control of the controller and selects a stream output from the tuner unit or the buffer and inputs the stream to the storage device; And And a second switch configured to switch under the control of the controller to input the stream output from the storage device or the buffer to the stream processor. The method according to claim 1 or 2, The tuner unit; Receives a DMB (Digital Multi Broadcasting) signal and outputs an AV stream, The stream processing unit; A demultiplexer for separating the input AV stream into an audio stream and a video stream; An audio decoder and a video decoder configured to decode the audio stream and the video stream separated by the demultiplexer, respectively, and output an audio signal and a video signal; And an audio output unit and a video output unit configured to process an audio signal and a video signal output by the audio decoder and the video decoder, respectively, so that a user can watch an AV signal. The method according to claim 1 or 2, The tuner unit; Receives a DAB (Digital Audio Broadcasting) signal and outputs an audio stream, The stream processing unit; An audio decoder for decoding an input audio stream and outputting an audio signal; And And an audio output unit configured to process an audio signal output by the audio decoder so that a user can listen to the audio signal. The method of claim 1, wherein the buffer; The broadcast signal receiving apparatus, characterized in that the capacity for storing the stream is variable under the control of the controller.