KR100698648B1 - Mobile communication terminal for streaming without interruption - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal capable of receiving and playing digital multimedia broadcasting. The present invention relates to a broadcast receiving unit for receiving a broadcast signal through an antenna, a first buffer for temporarily storing audio and video data input from the broadcast receiving unit, and interpolation processing. A buffer including a second buffer for storing the stored data, an audio decoder and a video decoder for restoring and outputting audio and video data stored in the buffer, and an input of an interpolation command, An interpolation processor for reading and interpolating data stored in one buffer and storing data generated by interpolation in the second buffer; and a broadcast for outputting an interpolation command to the interpolation processor when a broadcast reception error signal is input from the broadcast receiver. It characterized in that it comprises a control unit.

Mobile terminal, dropped, interpolation, buffer, frame memory

Description

Mobile communication terminal for preventing broadcast interruption {Mobile communication terminal for streaming without interruption}

1 schematically illustrates the overall configuration of a conventional digital multimedia broadcasting service system.

2 is a block diagram showing the configuration of a mobile communication terminal capable of receiving and playing digital multimedia broadcasting according to an embodiment of the present invention.

3 is a block diagram showing the configuration of a mobile communication terminal capable of receiving and playing digital multimedia broadcasting according to another embodiment of the present invention.

<Brief Description of Drawings>

110, 210: Broadcast receiver 130, 250: A / V decoder

151 and 153: first and second frame memories 231 and 233: first and second buffers

165, 265: Audio output 195, 295: Video output

170, 270: interpolation processing unit 190, 290: broadcasting control unit

180: switching unit

The present invention relates to a mobile communication terminal capable of receiving and playing digital multimedia broadcasting, and more particularly, to a technology capable of preventing digital multimedia broadcasting from being interrupted in the mobile communication terminal.

Until recently, mobile communication was only a means of exchanging calls and texts. However, with the recent development of mobile communication technology and the opening of satellite communication services to the private sector, mobile carriers have developed broadcasting technology in mobile communication terminals as memory loading technology for storing large-capacity digital multimedia such as video and music video has been developed. A service for watching digital multimedia broadcasting is provided. Furthermore, mobile operators are planning to provide terrestrial broadcasting services using terrestrial waves.

1 schematically illustrates the overall configuration of a conventional digital multimedia broadcasting (DMB) service system. As shown in the drawing, the digital multimedia broadcasting (DMB) service system receives a broadcasting station 10 that provides various broadcasting programs such as a moving picture, a music video, a drama, and a broadcast signal 14 상기 transmitted from the broadcasting station 10. Digital broadcast satellite 20 which transmits a broadcast signal of 2.6 ㎓ band or 14 ㎓ band and a Gap filler that receives a 14 ㎓ band broadcast signal and outputs a 2.6 ㎓ band broadcast signal to compensate for shadow areas such as downtown areas. And a mobile communication terminal 40 for receiving a broadcast signal of 2.6 GHz band from the digital broadcasting satellite 20 or the gap filler 30. Currently, domestic mobile communication terminal operators are in the process of manufacturing and commercializing mobile communication terminals, so-called DMB phones, which receive digital multimedia broadcasting signals, process them, and output them.

However, DMB broadcasting is currently being started in the metropolitan area and some regions, not the whole country. On the other hand, in some areas where DMB broadcasting is performed, there are many shortages of a gap filler. Accordingly, a mobile communication terminal capable of receiving a DMB broadcast currently has a problem in that when the DMB broadcast is received while moving, the reception of the broadcast is deteriorated due to the geographical characteristics or the surrounding conditions, thereby causing the screen to be cut off.

Accordingly, the present invention has been proposed in the background as described above, and an object of the present invention is to provide a technique capable of preventing a broadcast interruption during digital multimedia broadcasting playback.

A mobile communication terminal according to an aspect of the present invention for achieving the above object, the broadcast receiving unit for receiving a broadcast signal through an antenna, a first buffer for temporarily storing audio and video data input from the broadcast receiving unit and interpolation processing A buffer including a second buffer for storing the stored data, an audio decoder and a video decoder for restoring and outputting audio and video data stored in the buffer, and an input of an interpolation command, An interpolation processor for reading and interpolating data stored in one buffer and storing data generated by interpolation in the second buffer; and a broadcast for outputting an interpolation command to the interpolation processor when a broadcast reception error signal is input from the broadcast receiver. It characterized in that it comprises a control unit.

According to this aspect, the user of the mobile communication terminal of the present invention can seamlessly watch the broadcast even if the reception of the broadcast deteriorates due to the geographical characteristics or the surrounding situation, for example, during digital multimedia viewing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

2 is a block diagram showing the configuration of a mobile communication terminal capable of receiving and playing digital multimedia broadcasting according to an embodiment of the present invention.

As shown, the mobile communication terminal 100 according to the present embodiment largely includes a broadcast receiver 110, an A / V decoder 130, a memory 150, an audio output unit 165, and interpolation. The processor 170 includes a switching unit 180, a broadcasting control unit 190, and a video output unit 195.

 The broadcast receiving unit 110 receives a broadcast signal through an antenna for digital multimedia broadcasting, and includes a tuner 111 and a demodulator 112 in one embodiment. The tuner 111 tunes a broadcast signal of a specific frequency band among digital broadcast signal bands received through a digital multimedia broadcasting antenna under control input from the broadcast control unit 190. The demodulator 112 decodes the multi-channel signal, which is multiplexed and inserted into a broadcast signal of a specific frequency band tuned by the tuner 111, decodes the data of the dual selected channel, and decodes the decoded data into audio data, video data, and the like. Output to different paths that are separated into other service information data.

The A / V decoder 130 restores audio and video data input from the demodulator 112 to original uncompressed data, and includes an audio decoder 131 and a video decoder 133. The configuration of the audio decoder 131 and the video decoder 133 is well known before the filing date, and a detailed description thereof will be omitted.

The memory 150 preferably stores video data or data necessary for a decoding operation. In the present embodiment, the memory 150 includes a first frame memory 151 for storing data input from the video decoder 133 and a second frame memory 153 for storing interpolated data. In an exemplary embodiment, the first frame memory 151 may be configured to store first video data normally received and outputted, and second video data in a playback standby state.

The audio output unit 165 converts audio data input from the audio decoder 131 into a signal that can be perceived by a human, and outputs it. In one embodiment, the audio output unit 165 may include a digital analog converter, a gain control amplifier and a speaker. In a preferred embodiment, the amplifier is implemented to operate according to a mute control signal input from the broadcast control unit 190.

The interpolation processing unit 170 performs data retrieval in the process of attempting to resynchronize when the broadcast reception unit 110 fails to synchronize the broadcast according to, for example, geographical characteristics or surrounding conditions during digital multimedia broadcasting. Even if there is a loss, the terminal user can watch the broadcast without interruption.

In an exemplary embodiment, the interpolation processor 170 may receive first video data normally received and reproduced in the first frame memory 151 when the interpolation command is input from the broadcast control unit 190, and the second video in a playback standby state. The data generated by reading and interpolating the data and interpolating the data are stored in the second frame memory 153.

The switching unit 180 selectively outputs data input from the first frame memory 151 and the second frame memory 153 according to a switching control signal input to the selection terminal. Here, the switching control signal input to the selection terminal of the switching unit 180 is input from the broadcast control unit 190.

The broadcast controller 190 controls the operation of the entire system, and is preferably implemented as a microprocessor in which ROM, RAM, and peripheral circuits are integrated. In one embodiment, when the broadcast reception error signal is input from the broadcast reception unit 110, the broadcast control unit 190 outputs an interpolation command to the interpolation processing unit 170 and a switching control signal to the switching unit 180. In addition, when the broadcast reception error signal is input from the broadcast reception unit 110, the broadcast control unit 190 outputs a mute control signal to the audio output unit 165.

The video output unit 195 converts the video data input from the video decoder 133 into a signal that can be perceived by a human, and outputs it. According to an embodiment, the video output unit 195 may include an encoder for converting and outputting video data input from the video decoder 133 according to a screen display method. Such an encoder can be implemented by those skilled in the art as it is well known before the filing date.

3 is a block diagram illustrating a configuration of a mobile communication terminal capable of receiving and playing digital multimedia broadcasting according to another embodiment of the present invention.

As shown, the mobile communication terminal 200 according to the present embodiment includes a broadcast receiving unit 210, a buffer unit 230, an A / V decoder 250, an audio output unit 265, The interpolation processor 270 includes a broadcast control unit 290 and a video output unit 295.

 The broadcast receiving unit 210 receives a broadcast signal through an antenna for digital multimedia broadcasting. In an embodiment, the broadcast receiving unit 210 includes a tuner 211 and a demodulator 212. The tuner 211 tunes a broadcast signal of a specific frequency band among digital broadcast signal bands received through a digital multimedia broadcasting antenna under control input from the broadcast control unit 290. The demodulator 212 decodes the multi-channel signal multiplexed and inserted into a broadcast signal of a specific frequency band tuned by the tuner 211, decodes the data of the dual selected channel, and decodes the decoded data into audio data, video data, and the like. Output to different paths that are separated into other service information data.

The buffer unit 230 includes a first buffer 231 for temporarily storing audio and video data input from the broadcast receiving unit 210, and a second buffer 233 for storing interpolated data. In an exemplary embodiment, the first buffer 231 may be configured to store first video data normally received and outputted, and second video data in a playback standby state.

The A / V decoder 250 restores audio and video data input from the demodulator 212 to original uncompressed data, and includes an audio decoder 251 and a video decoder 253. The configuration of the audio decoder 251 and the video decoder 251 is well known before the filing date, and detailed description thereof will be omitted.

The audio output unit 265 converts audio data input from the audio decoder 251 into a signal that can be perceived by a human, and outputs the converted signal. In one embodiment, the audio output unit 251 may include a digital analog converter, a gain control amplifier and a speaker. In a preferred embodiment, the amplifier is implemented to operate according to a mute control signal input from the broadcast control unit 290.

The interpolation processing unit 270 performs data retrieval in the process of attempting to resynchronize when the broadcast reception unit 210 attempts to resynchronize when the broadcast synchronization fails during the digital multimedia broadcasting, for example, due to geographical characteristics or surrounding conditions. Even if there is a loss, the terminal user can watch the broadcast without interruption.

In one embodiment, the interpolation processing unit 270, upon input of an interpolation command from the broadcast control unit 290, first video data normally received and reproduced in the first buffer 231, and second video data in a playback standby state. Read and interpolate the data, and store the generated data in the second buffer 233.

The broadcast control unit 290 controls the operation of the entire system. Preferably, the broadcast control unit 290 is implemented as a microprocessor in which ROM, RAM, and peripheral circuits are integrated. According to an embodiment, the broadcast control unit 290 outputs an interpolation command to the interpolation processor 270 when a broadcast reception error signal is input from the broadcast reception unit 210. In addition, when the broadcast reception error signal is input from the broadcast reception unit 210, the broadcast control unit 290 outputs a mute control signal to the audio output unit 265.

The video output unit 295 converts the video data input from the video decoder 253 into a signal that can be perceived by a human, and outputs it. According to an embodiment, the video output unit 295 may include an encoder for converting and outputting video data input from the video decoder 253 according to a screen display method. Such an encoder can be implemented by those skilled in the art as it is well known before the filing date.

Hereinafter, referring to FIG. 3, the operation of the mobile communication terminal includes: ① the mobile communication terminal receiving a broadcast signal through an antenna due to the buffer unit 230 between the demodulator 212 and the A / V decoder 250. Playback is performed with a time delay (2ΔT) more than the time point. For example, when data (ABC order) is received at a predetermined time T at a predetermined time interval ΔT, the data is stored in the first buffer 231 and the time is transmitted to the A / V decoder 250. Since the playback starts from the time (T + ΔT) where the delay ΔT occurs, A is reproduced when B is received and B is reproduced when C is received.

(2) Then, when the connection state is lost due to unstable broadcast signal, the broadcast receiving unit 210 attempts reconnection (resynchronization), and sends a broadcast reception error signal to the broadcast control unit 290. ③ The broadcast control unit 290 receiving the broadcast reception error signal inputs an interpolation command to the interpolation processor 270. The interpolation processor 270 that receives the interpolation command reads the last played data B and the standby data C stored in the first buffer 231. Thereafter, the interpolation processor 270 generates data B ′ having an intermediate value with the read data B and C and sends the data B ′ to the second buffer 233. ④ While the broadcast receiver 210 attempts reconnection (resynchronization), the second buffer 233 sends new intermediate data B ′ to the A / V decoder 250.

If the D data is lost after the C data and E data is received during the resynchronization, the interpolation processing unit 270 generates the data C 'having an intermediate value between the data C and E to generate a second buffer. Will be sent to (233). (6) The A / V decoder 250 reproduces the data (A-B-B'-C-C'-E ...). Through this process, it is possible to prevent the disconnection that the customer feels for a certain period of time.

As described above, according to the present invention, the user of the mobile communication terminal of the present invention has a useful effect of continuously watching a broadcast even when the reception of the broadcast is deteriorated due to the geographical characteristics or the surrounding situation, for example, during digital multimedia viewing.

In addition, according to the present invention, digital multimedia broadcasting is currently being implemented only in the metropolitan area and some regions, not in the whole country as a starting stage, and in some regions, there are many repeaters. There is a useful effect that can solve the inconvenience of watching a broadcast due to the reception interruption phenomenon.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, it should be interpreted by the claims described to include many such variations.

Claims (6)

A broadcast receiver for receiving a broadcast signal through an antenna; A buffer unit including a first buffer for temporarily storing audio and video data input from the broadcast receiving unit, and a second buffer for storing interpolated data; An A / V decoder including an audio decoder for restoring and outputting audio and video data stored in the buffer unit; An interpolation processor configured to read and interpolate data stored in the first buffer and to store data generated by interpolating the data stored in the first buffer in the second buffer; A broadcast controller which outputs an interpolation command to the interpolation processor when a broadcast reception error signal is input from the broadcast receiver; Mobile communication terminal comprising a. 2. The method of claim 1, wherein the first buffer stores first video data normally received and outputted, and second video data in a playback standby state. The interpolation processing section: And interpolating the first video data and the second video data stored in the first buffer. The mute control signal according to claim 1, wherein the broadcast control unit outputs a mute control signal to an audio output unit which converts and outputs audio data input from the audio decoder into a human perceptible signal when a broadcast reception error signal is input. Mobile communication terminal, characterized in that. A broadcast receiver for receiving a broadcast signal through an antenna; An A / V decoder including an audio decoder for restoring and outputting audio and video data input from the broadcast receiving unit; A memory including a first frame memory storing data input from the video decoder and a second frame memory storing interpolated data; An interpolation processor configured to read and interpolate data stored in the first frame memory and to store data generated by interpolating the data stored in the first frame memory in the second frame memory; A switching unit for selectively outputting data input from the first frame memory and the second frame memory according to a switching control signal input to a selection terminal; A broadcast control unit outputting an interpolation command to the interpolation processing unit and a switching control signal to the switching unit when a broadcast reception error signal is input from the broadcast receiving unit; Mobile communication terminal comprising a. The method of claim 4, wherein the first frame memory stores first video data normally received and reproduced, and second video data in a playback standby state. The interpolation processing section: And interpolating the first video data and the second video data stored in the first frame memory. The audio control unit of claim 4, wherein the broadcast control unit outputs a mute control signal to an audio output unit that converts audio data input from the audio decoder into a signal that can be perceived by a human when a broadcast reception error signal is input. Mobile communication terminal, characterized in that.

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