KR101561908B1 - Broadcast receiving method and apparatus thereof - Google Patents

Abstract

The present invention relates to a broadcast receiving method and apparatus that can prevent an audio reproduction error and can quickly reproduce an audio signal by extracting audio parameters in advance. To this end, a broadcast receiving method according to embodiments of the present invention includes: extracting audio data and broadcast related information included in a digital broadcast signal; Extracting a first audio parameter from the audio data, extracting a second audio parameter from the broadcast-related information, and extracting the audio data based on an audio parameter having a higher priority than the first audio parameter and the second audio parameter Decoding.

A broadcast receiving apparatus, an audio parameter

Description

TECHNICAL FIELD [0001] The present invention relates to a broadcast receiving method and apparatus,

The present invention relates to a broadcast receiving method and apparatus.

Generally, communication terminals such as mobile phones, smart phones, notebook computers, digital broadcasting terminals, personal digital assistants (PDAs), and portable multimedia players (PMPs) transmit video and audio signals through a wireless communication network And reproduces the received broadcast signal.

It is an object of the present invention to provide a broadcast receiving method and apparatus capable of preventing an audio reproduction error.

It is another object of the present invention to provide a broadcast receiving method and apparatus capable of accurately and quickly reproducing an audio signal (speeding up a broadcast entry speed) by extracting audio parameters in advance.

According to an aspect of the present invention, there is provided a broadcast receiving apparatus including: a transmit processor for extracting audio data and broadcast related information included in a digital broadcast signal; A parser for extracting a first audio parameter from the audio data and extracting a second audio parameter from the broadcast-related information; And a decoder for decoding the audio data based on an audio parameter having a higher priority than the first audio parameter and the second audio parameter.

According to another aspect of the present invention, there is provided a broadcast receiving apparatus for a mobile terminal, including: a tuner for receiving a broadcast signal from a base station via an antenna; A demodulator for converting a broadcast signal received by the tuner into a transport stream; A transport processor for extracting audio and video packets and broadcast-related information from the transport stream; A parser for parsing the audio data to extract a first audio parameter from the audio data and extracting a second audio parameter from the broadcast related information when the audio data is detected from the transport stream; ; A decoder for setting the first audio parameter and the second audio parameter according to a priority order and decoding the audio data based on the set audio parameter; And a control unit for outputting the decoded audio data through a sound output unit.

According to an aspect of the present invention, there is provided a broadcast receiving method including extracting audio data and broadcast related information included in a digital broadcast signal; Extracting a first audio parameter from the audio data and extracting a second audio parameter from the broadcast-related information; And decoding the audio data based on an audio parameter having a higher priority than the first audio parameter and the second audio parameter.

According to another aspect of the present invention, there is provided a broadcast receiving method of a mobile terminal, including: receiving a broadcast signal from a base station through an antenna; Converting the broadcast signal received by the tuner into a transport stream; Extracting audio and video packets and broadcast-related information from the transport stream; Parsing the audio data to extract a first audio parameter from the audio data and parsing the broadcast related information to extract a second audio parameter from the broadcast related information if audio data is detected from the transport stream; Setting the first audio parameter and the second audio parameter according to a priority order, and decoding the audio data based on the set audio parameter; And outputting the decoded audio data through a sound output unit.

The broadcast receiving method and apparatus according to the embodiment of the present invention can prevent an audio reproduction error by setting the extracted audio parameters in the decoder by parsing the audio data included in the broadcast signal.

The broadcast receiving method and apparatus according to embodiments of the present invention extracts audio parameters from the audio data before parsing a program map table included in the broadcast signal and extracting audio parameters, The audio data can be quickly reproduced by reproducing the audio data.

Hereinafter, an embodiment of a broadcast receiving method and apparatus capable of precisely and quickly reproducing an audio signal by preventing an audio reproduction error and extracting audio parameters in advance will be described in detail with reference to FIGS. 1 to 6. FIG.

1 is a block diagram illustrating a configuration of a mobile communication terminal 100 to which a broadcast receiving apparatus according to an embodiment of the present invention is applied. The mobile communication terminal (mobile phone) 100 may be implemented in various forms. For example, the mobile communication terminal 100 includes a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), and a PMP (Portable Multimedia Player).

1, the mobile communication terminal 100 includes a wireless communication unit 110, an A / V (audio / video) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150 A memory 160, an interface unit 170, a control unit 180, a power supply unit 190, and the like. All of the components of the mobile communication terminal 100 shown in FIG. 1 are not essential components, and the mobile communication terminal 100 may be implemented by more components than the components shown in FIG. 1, The mobile communication terminal 100 may be implemented by a component.

The wireless communication unit 110 may include at least one component for performing wireless communication between the mobile communication terminal 100 and the wireless communication system or wireless communication between the mobile communication terminal 100 and a network on which the mobile communication terminal 100 is located . For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114 and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may be a server for generating and transmitting broadcast signals and / or broadcast-related information, or a server for receiving previously generated broadcast signals and / or broadcast-related information and transmitting the broadcast signals and / or broadcast- related information to the mobile communication terminal 100 . The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

Meanwhile, the broadcast related information may be provided through a mobile communication network, and in this case, it may be received by the mobile communication module 112. The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcasting signals using various broadcasting systems. In particular, the broadcasting receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) Only Digital Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 is configured to be suitable for all broadcasting systems that provide broadcasting signals as well as the digital broadcasting system described above. The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data related to transmission and reception of a voice call signal, a video call signal, and / or a text / multimedia message.

The wireless Internet module 113 refers to a module for wireless Internet access, and the wireless Internet module 113 can be embedded in the mobile communication terminal 100 or externally. Here, the wireless Internet technology includes a wireless LAN (WLAN), a Wi-Fi, a wireless broadband (Wibro), a WiMAX, and a High Speed Downlink Packet Access (HSDPA) Can be used.

The short-range communication module 114 means a module for short-range communication. Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, etc. may be used as the short distance communication technology.

The location information module 115 is a module for confirming or obtaining the location of the mobile terminal. One example is the GPS (Global Position System) module. The GPS module receives position information from a plurality of satellites. Here, the location information may include coordinate information indicated by latitude and longitude. For example, the GPS module can accurately calculate the current position according to the triangle method by measuring the precise time and distance from three or more satellites and measuring three different distances. A method of obtaining distance and time information from three satellites and correcting the error by one satellite may be used. In particular, the GPS module can acquire latitude, longitude and altitude as well as three-dimensional velocity information and accurate time from the position information received from the satellite. A Wi-Fi Positioning System and / or a Hybrid Positioning System may be applied as the location information module 115.

The A / V input unit 120 is for inputting an audio signal or a video signal. The A / V input unit 120 includes a camera 121 and a microphone 122, . The camera 121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The camera 121 may be composed of two or more according to the configuration of the mobile terminal.

The microphone 122 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. In the call mode, the processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 and output. The microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the mobile terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit 151, it can be called a touch screen.

The sensing unit 140 senses the position of the mobile communication terminal 100 in the open / close state, the position of the mobile communication terminal 100, the presence of the user, the orientation of the mobile communication terminal 100, The mobile communication terminal 100 senses the current state of the mobile communication terminal 100 and generates a sensing signal for controlling the operation of the mobile communication terminal 100. For example, when the mobile communication terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. The sensing unit 140 senses whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like.

The interface unit 170 serves as an interface with all external devices connected to the mobile communication terminal 100. For example, the interface unit 170 may include a headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, An audio input / output (I / O) port, a video I / O (input / output) port, and an earphone port. Here, the identification module is a chip that stores various information for authenticating the usage right of the mobile communication terminal 100, and includes a user identification module (UIM), a subscriber identity module (SIM) ), A Universal Subscriber Identity Module (" USIM "), and the like. In addition, an apparatus (hereinafter, referred to as 'identification device') having the identification module may be manufactured in a smart card format. Accordingly, the identification module can be connected to the mobile communication terminal 100 through the port. The interface unit 170 receives data from an external device or receives power from the external device and transmits the received data to each component in the mobile communication terminal 100 or transmits data in the mobile communication terminal 100 to an external device.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 includes a display unit 151, an audio output module 152, an alarm unit 153, May be included.

The display unit 151 displays information to be processed by the mobile communication terminal 100 and outputs the information. For example, when the mobile communication terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile communication terminal 100 is in the video communication mode or the photographing mode, the displayed image or the UI or GUI is displayed.

The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display (3D display). There may be two or more display units 151 according to the embodiment of the mobile communication terminal 100. For example, the mobile communication terminal 100 may be provided with an external display unit (not shown) and an internal display unit (not shown) at the same time.

(Hereinafter, referred to as a 'touch screen') has a mutual layer structure with the display unit 151 and a sensor (hereinafter, referred to as 'touch sensor' It can also be used as an input device in addition to the device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch. If there is a touch input to the touch sensor, the corresponding signal (s) is sent to a touch controller (not shown). The touch controller processes the signal (s) and transmits the corresponding data to the control unit 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

Quot; Proximity Touch "refers to an operation of recognizing that the pointer is positioned on the touch screen without touching the pointer on the touch screen, and the pointer is actually contacted on the touch screen The action is referred to as "Contact Touch ". A position where the pointer is proximally touched on the touch screen means a position where the pointer corresponds to the touch screen vertically when the pointer is touched.

Further, the proximity sensor 141 detects a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, do. Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The sound output module 152 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile communication terminal 100. The sound output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile communication terminal 100. Examples of events that occur in the mobile terminal include receiving a call signal, receiving a message, and inputting a key signal. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. When the call signal is received or the message is received, the alarm unit 153 can vibrate the mobile terminal through the vibration means to inform it. Alternatively, when the key signal is input, the alarm unit 153 may vibrate the mobile communication terminal 100 through the vibration means with the feedback of the key signal input. Through the above-described vibration, the user can recognize the occurrence of the event. Of course, a signal for notifying the occurrence of an event may also be output through the display unit 151 or the audio output module 152.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of air through the injection port or the suction port, a spit on the skin surface, contact with an electrode, And various effects of tactile effect such as effect of reproducing the cold sensation using the heat absorbing or heatable element can be generated.

The haptic module 154 can transmit a tactile effect through direct contact, and the tactile effect can be felt by a user through a muscular sense such as a finger or an arm. At least two haptic modules 154 may be provided according to the configuration of the telematics terminal. The haptic module 154 may be provided in a place where frequent contact with a user is frequent in the vehicle. For example, a steering wheel, a shift gear lever, a seat, and the like.

The memory 160 may store a program for processing and control of the controller 180 and may have a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, . ≪ / RTI >

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) (Random Access Memory) SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory) A disk, and / or an optical disk. In addition, the mobile communication terminal 100 may operate a web storage that performs a storage function of the memory 150 on the Internet.

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. For example, the interface unit 170 may include a headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, An audio input / output (I / O) port, a video I / O (input / output) port, and an earphone port. Here, the identification module is a chip that stores various information for authenticating the use right of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identity module (SIM) A Universal Subscriber Identity Module (USIM), and the like. In addition, the device having the identification module (hereinafter, referred to as 'identification device') can be manufactured in a smart card format. Accordingly, the identification module can be connected to the mobile terminal 100 through the port. The interface unit 170 receives data from an external device or receives power from the external device and transmits the received data to each component in the mobile terminal 100 or transmits data in the mobile terminal 100 to an external device.

When the mobile terminal 100 is connected to an external cradle, the interface unit 170 may be a path through which power from the cradle is supplied to the mobile terminal 100, or various commands A signal may be transmitted to the mobile terminal 100. The various command signals or the power source inputted from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile communication terminal 100. For example, the control unit 180 performs related control and processing for voice call, data communication, video call, and the like. In addition, the controller 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180.

The control unit 180 can perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 and supplies power required for operation of the respective components.

The functions of the components applied to the mobile communication terminal 100 may be implemented in a computer-readable recording medium using software, hardware, or a combination thereof. According to a hardware implementation, an application specific integrated circuit (ASIC), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs) controllers may be implemented using at least one of micro-controllers, microprocessors, and electrical units for performing functions. In some cases, such embodiments may be implemented by the controller 180 Depending on the software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. The software code may be a software application written in a suitable programming language The software code may be stored in the memory 160, And executed by a unit 180.

The navigation session 300 applied to the mobile communication terminal 100 generates the navigation information based on the map data and the location information of the mobile communication terminal 100 and transmits the generated navigation information to the user Notify.

The voice recognition module 182 recognizes a voice uttered by a user and performs a corresponding function according to the recognized voice signal.

A broadcast receiving module (or a broadcast receiver) 111 applied to the mobile communication terminal 100 according to an embodiment of the present invention includes audio data and broadcast information (for example, broadcast related information) included in a digital broadcast signal, Extracts a first audio parameter from the audio data, extracts a second audio parameter from the broadcast information, and extracts the audio parameter based on the audio parameter having a higher priority than the first audio parameter and the second audio parameter, And decodes the data. The decoded audio data is output through the audio output module 152 as in the prior art.

For example, according to an embodiment of the present invention, a broadcast receiving module 111 applied to the mobile communication terminal 100 receives a digital broadcasting signal, and outputs audio data and a program map table Extracting the first audio parameter from the audio data by parsing the audio data when a first audio parameter (parameter) is detected from the audio data, (For example, audio parameters included in the audio data) having a higher priority than the first audio parameter and the second audio parameter to the decoder, and based on the set audio parameter, And outputs the decoded audio data through the acoustical output module 152. The audio output module 152 decodes the decoded audio data. Here, it is possible to set an audio parameter having a low audio reproduction error occurrence rate to a high priority.

2 is a block diagram illustrating a vehicle navigation system for explaining a telramatic terminal to which a broadcast receiving apparatus according to an embodiment of the present invention is applied.

As shown in Fig. 2, the car navigation system includes an information providing center 30 for providing traffic information and various data (for example, programs, executable files, etc.); And a telematics terminal 200 installed in the vehicle, receiving traffic information through the wireless communication network 20, and providing a guidance service based on the GPS signal received through the satellite 10 and the traffic information .

Hereinafter, a configuration of a telematics terminal 200 to which a broadcast receiving apparatus according to an embodiment of the present invention is applied will be described with reference to FIG.

3 is a block diagram illustrating a configuration of a telematics terminal 200 to which a broadcast receiving apparatus according to an embodiment of the present invention is applied.

3, the telematics terminal 200 includes a control unit (e.g., a central processing unit, CPU) 212 for controlling the telematics terminal 200 as a whole, a memory 213 for storing various types of information, A key controller 211 for controlling various key signals, and an LCD controller 214 for controlling a liquid crystal display (LCD).

The memory 213 stores map information (map data) for displaying the route guidance information on the digital map. In addition, the memory 213 stores traffic information collection control algorithms for allowing the vehicle to input traffic information according to the current road conditions, and information for controlling the algorithms.

The main board 210 is provided with a code division multiple access (CDMA) module 206, which is a mobile communication terminal built in a vehicle to which a unique device number is assigned, guidance for the location of the vehicle, A GPS module 207 for receiving a GPS signal or transmitting traffic information collected by a user as a Global Positioning System (GPS) signal, a CD deck 208 for reproducing a signal recorded on a CD (compact disc) A gyro sensor 209, and the like. The CDMA module 206 and the GPS module 207 transmit / receive signals through the antennas 204 and 205, respectively.

The broadcast receiving module 222 is connected to the main board 210 and receives a broadcast signal through the antenna 223. The main board 210 includes a display unit (LCD) 201 under the control of the LCD control unit 214 through an interface board 203, a front board 202 under the control of the key control unit 211, A camera 227 for photographing the inside and / or the outside is connected. The display unit 201 displays various video signals and character signals. The front board 202 includes buttons for inputting various key signals, and a key signal corresponding to a user-selected button is transmitted to the main board 210 ). In addition, the display unit 201 includes the proximity sensor and the touch sensor (touch screen) of FIG.

The front board 202 may have a menu key for directly inputting traffic information, and the menu key may be controlled by the key controller 211.

The audio board 217 is connected to the main board 210 and processes various audio signals. The audio board 217 includes a microcomputer 219 for controlling the audio board 217, a tuner 218 for receiving a radio signal, a power source 216 for supplying power to the microcomputer 219, And a signal processing unit 215 for processing a signal.

The audio board 217 includes a radio antenna 220 for receiving radio signals and a tape deck 221 for reproducing audio tapes. The audio board 217 may further comprise a voice output unit (for example, an amplifier) 226 for outputting a voice signal processed by the audio board 217.

The audio output unit (amplifier) 226 is connected to the vehicle interface 224. That is, the audio board 217 and the main board 210 are connected to the vehicle interface 224. The vehicle interface 224 may be connected to a handsfree 225a for inputting a voice signal, an air bag 225b for occupant safety, a speed sensor 225c for detecting the speed of the vehicle, and the like. The speed sensor 225c calculates the vehicle speed and provides the calculated vehicle speed information to the central processing unit 212. [

The navigation session 300 applied to the telematics terminal 200 generates the route guidance information based on the map data and the current vehicle location information, and notifies the user of the generated route guidance information.

The display unit 201 senses the proximity touch in the display window through the proximity sensor. For example, the display unit 201 may detect the position of the proximity touch when a pointer (e.g., a finger or a stylus pen) is touched in proximity, and transmit position information corresponding to the detected position And outputs it to the control unit 212.

The speech recognition device (or speech recognition module) 301 recognizes the speech uttered by the user and performs the corresponding function according to the recognized speech signal.

A broadcast receiving module (or broadcast receiver) 222 applied to the telematics terminal 200 extracts audio data and broadcast information included in a digital broadcast signal, Extracts an audio parameter, extracts a second audio parameter from the broadcast information, and decodes the audio data based on an audio parameter having a higher priority than the first audio parameter and the second audio parameter. The decoded audio data is output through the audio output unit 226 as in the prior art.

For example, according to an embodiment of the present invention, a broadcast receiving module 222 applied to a telematics terminal 200 receives a digital broadcast signal, and stores audio data included in the received broadcast signal and a Program Map Extracts the first audio parameter from the audio data and extracts the second audio parameter from the program map table when the first audio parameter (parameter) is detected from the audio data; (For example, audio parameters included in the audio data) having a higher priority than the first audio parameter and the second audio parameter to the decoder, and decodes the audio data based on the set audio parameter And outputs the decoded audio data through the audio output unit 226. Here, it is possible to set an audio parameter having a low audio reproduction error occurrence rate to a high priority.

Hereinafter, a configuration of a broadcast receiving apparatus according to an embodiment of the present invention will be described with reference to FIG. 3 and FIG. 4 may include not only the mobile communication terminal 100 and the telematics terminal 200 but also a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (personal digital assistant), a PMP Portable multimedia players), televisions, and the like.

4 is a block diagram illustrating a configuration of a broadcast receiving apparatus according to an embodiment of the present invention.

4, a broadcast receiving apparatus according to an exemplary embodiment of the present invention includes a tuner 401 for receiving a digital broadcast signal from a base station through an antenna 223 and selecting a channel according to a user's request; A demodulator for converting a broadcast signal of a channel selected by the tuner 401 into a baseband signal and converting the baseband signal into a transport stream and outputting the converted transport stream, ) 402; Transmission for extracting audio and video packets and broadcast related information (e.g., program specific information (PSI) / service information (SI) and program map table (PMT)) from the transport stream A transport processor 403; (E.g., a LOAS header) from the transport stream and extracts a first audio parameter from the audio data; A parser 404 parsing the broadcast-related information (e.g., program map table PMT) to extract a second audio parameter from the broadcast-related information; And a decoder 405 for setting the first audio parameter and the second audio parameter in priority order and decoding the audio data included in the extracted audio packet based on the set audio parameter do. At this time, the controller 212 outputs the decoded audio data through the audio output unit 226. Here, the first audio parameter and / or the second audio parameter may be audio parameters for Indeo, MPEG1, MPEG2, MPEG3, MPEG4, and Qualcomm codec of MPEG.

In addition, the decoder 405 sets the first audio parameter and the second audio parameter according to a priority order, or extracts the extracted audio parameter based on the first extracted audio parameter among the first audio parameter and the second audio parameter, The audio data included in the packet may be decoded. Here, the audio parameters recorded in the program map table as in the prior art may not match the actual audio data, and erroneous audio parameters may be recorded in the program map table. However, if the extracted first audio If the first audio parameter is set in the decoder 405, no audio reproduction error occurs because the data is an audio parameter that matches the audio data. Also, it is possible to quickly reproduce the audio data by extracting the first audio parameter from the audio data and reproducing the audio data based on the first audio parameter before parsing the program map table and extracting the second audio parameter.

First, the tuner 401 receives a digital broadcasting signal from a base station through an antenna 223, receives a broadcasting signal of a selected channel according to a user's request, and transmits the received broadcasting signal to the demodulator 402 Output.

 The demodulator 402 converts a broadcast signal of a channel selected by the tuner 401 into a baseband signal, converts the baseband signal into a transport stream, and transmits the converted transport stream to the transport processor 403 Output.

The transport processor 403 extracts audio and video packets, broadcast related information (e.g., program specific information (PSI) / service information (SI) and program map table (PMT)) from the transport stream, And outputs the extracted audio and video packets and broadcast related information to the parser 404.

The parser 404 parses the audio data (for example, a LOAS header) to extract a first audio parameter when audio data (e.g., a low overhead audio stream, LOAS) is detected from the transport stream, And outputs the extracted first audio parameter to the decoder (405).

Further, the parser 404 parses the broadcast-related information (e.g., a program map table PMT) to extract a second audio parameter from the broadcast-related information, and outputs the extracted second audio parameter to the decoder (405).

The decoder 405 sets the first audio parameter and the second audio parameter in order of priority, decodes the audio data included in the extracted audio packet based on the set audio parameter, and outputs the decoded audio parameter To the control unit (212). At this time, the controller 212 outputs the decoded audio data through the audio output unit 226.

Here, the second audio parameters recorded in the program map table, such as the prior art, may not match the actual audio data (e.g., do not match the audio parameters for decoding the audio data via the audio codec) Since the audio parameters may be recorded in the program map table, the first audio data extracted by parsing the audio data may be set by the designer to have a higher priority than the second audio parameter.

Hereinafter, a broadcast receiving method according to embodiments of the present invention will be described in detail with reference to FIGS.

5 is a flowchart illustrating a broadcast receiving method according to the first embodiment of the present invention.

First, the tuner 401 receives a digital broadcasting signal from a base station through an antenna 223, receives a broadcasting signal of a selected channel according to a user's request, and transmits the received broadcasting signal to the demodulator 402 (S11).

 The demodulator 402 converts a broadcast signal of a channel selected by the tuner 401 into a baseband signal, converts the baseband signal into a transport stream, and transmits the converted transport stream to the transport processor 403 Output.

The transport processor 403 extracts audio and video packets and broadcast related information (for example, program map table (PMT)) from the transport stream, and extracts the extracted audio and video packets and program map table And outputs it to the parser 404 (S12).

The parser 404 parses the audio data (for example, a LOAS header) to extract a first audio parameter when audio data (e.g., a low overhead audio stream, LOAS) is detected from the transport stream, And outputs the extracted first audio parameter to the decoder 405 (S13).

The parser 404 parses audio parameters from the broadcast-related information (e.g., program map table PMT) to extract second audio parameters, and outputs the extracted second audio parameters to the decoder 405 (S14).

The decoder 405 selects a first audio parameter having a higher priority from the first audio parameter and the second audio parameter and sets the selected first audio parameter to decode the audio data (S15, S16) .

The decoder 405 decodes the audio data included in the extracted audio packet based on the set audio parameter and outputs the decoded audio parameter to the controller 212. [ At this time, the control unit 212 outputs the decoded audio data through the audio output unit 226 (S17). Here, the first audio parameter and the second audio parameter may be the same audio parameter or different audio parameters.

Generally, to drive an audio codec, it parses a second audio parameter recorded in the program map table and transmits the parsed second audio parameter to a decoder (e.g., an audio decoder). At this time, erroneous audio parameters are recorded in the program map table, and audio parameters matching the audio data can not be transmitted to the decoder. In such a case, the decoder operates abnormally, causing a problem that the audio signal is not outputted. On the other hand, the present invention can prevent an audio reproduction error by setting an audio parameter having high priority included in the audio data in the decoder 405, and extract audio parameters from the audio data even if the audio parameter changes during the broadcast The audio data can be normally reproduced by normally decoding the audio data.

On the other hand, the decoder 405 selects a second audio parameter when the second audio parameter of the first audio parameter and the second audio parameter has a higher priority than the first audio parameter, and sets the selected second audio parameter (S18).

The decoder 405 decodes the audio data included in the extracted audio packet based on the set audio parameter and outputs the decoded audio parameter to the controller 212. [ At this time, the controller 212 outputs the decoded audio data through the audio output unit 226 (S19).

Hereinafter, a broadcast receiving method according to a second embodiment of the present invention will be described in detail with reference to FIGS. 4 and 6. FIG.

6 is a flowchart illustrating a broadcast receiving method according to a second embodiment of the present invention.

First, the tuner 401 receives a digital broadcasting signal from a base station through an antenna 223, receives a broadcasting signal of a selected channel according to a user's request, and transmits the received broadcasting signal to the demodulator 402 (S21).

 The demodulator 402 converts a broadcast signal of a channel selected by the tuner 401 into a baseband signal, converts the baseband signal into a transport stream, and transmits the converted transport stream to the transport processor 403 Output.

The transport processor 403 extracts audio and video packets and broadcast related information (e.g., program specific information (PSI) / service information (SI) and program map table (PMT)) from the transport stream, And outputs the audio and video packets and broadcast related information to the parser 404 (S22).

The parser 404 parses the audio data (for example, a LOAS header) when audio data (e.g., a low overhead audio stream, LOAS) is detected from the transport stream, And outputs the extracted first audio parameter to the decoder 405 (S23).

Further, the parser 404 parses audio parameters from the broadcast-related information (for example, program map table PMT) to extract second audio parameters from the broadcast-related information, and outputs the extracted second audio parameters To the decoder 405 (S24).

The decoder 405 selects the first audio parameter extracted first from among the first audio parameter and the second audio parameter and sets the selected first audio parameter to decode the audio data (S25, S26) .

The decoder 405 decodes the audio data included in the extracted audio packet based on the set audio parameter and outputs the decoded audio parameter to the controller 212. [ At this time, the controller 212 outputs the decoded audio data through the audio output unit 226 (S27). That is, it is possible to quickly reproduce the audio data by extracting the first audio parameter from the audio data and reproducing the audio data based on the first audio parameter before parsing the program map table to extract the second audio parameter.

Meanwhile, the decoder 405 selects a second audio parameter when the second audio parameter is extracted before the first audio parameter from among the first audio parameter and the second audio parameter, and sets the selected second audio parameter (S28).

The decoder 405 decodes the audio data included in the extracted audio packet based on the set audio parameter and outputs the decoded audio parameter to the controller 212. [ At this time, the control unit 212 reproduces the decoded audio data through the audio output unit 226 (S29).

As described above in detail, the broadcast receiving method and apparatus according to the embodiments of the present invention include: extracting audio parameters (audio parameters corresponding to audio data) extracted by parsing audio data included in a broadcast signal into a decoder 405, it is possible to prevent an audio reproduction error.

The broadcast receiving method and apparatus according to embodiments of the present invention extracts audio parameters from the audio data before parsing a program map table included in the broadcast signal and extracting audio parameters, The audio data can be quickly reproduced by reproducing the audio data.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1 is a block diagram illustrating a configuration of a mobile communication terminal to which a broadcast receiving apparatus according to an embodiment of the present invention is applied.

2 is a block diagram illustrating a vehicle navigation system for explaining a telramatic terminal to which a broadcast receiving apparatus according to an embodiment of the present invention is applied.

FIG. 3 is a block diagram illustrating a configuration of a telematics terminal to which a broadcast receiving apparatus according to an embodiment of the present invention is applied.

4 is a block diagram illustrating a configuration of a broadcast receiving apparatus according to an embodiment of the present invention.

5 is a flowchart illustrating a broadcast receiving method according to the first embodiment of the present invention.

6 is a flowchart illustrating a broadcast receiving method according to a second embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

401: tuner 402: demodulator

403: Transmit Processor 404: Parser

405: decoder 212:

226: Audio output unit

Claims (16)

A transmission processor for extracting audio data and broadcast related information included in a digital broadcast signal; A parser for extracting a first audio parameter from the audio data and extracting a second audio parameter from the broadcast-related information; And a decoder for giving the highest priority to the first audio parameter among the first audio parameter and the second audio parameter and for decoding the audio data based on the first audio parameter given the highest priority, . 2. The apparatus of claim 1, And extracts the first audio parameter by parsing a low overhead audio stream header included in the audio data. 2. The apparatus of claim 1, Wherein the decoding unit decodes the audio data based on the first extracted audio parameter among the first audio parameter and the second audio parameter. 2. The method of claim 1, Is an audio parameter included in the program map table. A tuner for receiving a broadcast signal from a base station via an antenna; A demodulator for converting a broadcast signal received by the tuner into a transport stream; A transport processor for extracting audio and video packets and broadcast-related information from the transport stream; A parser for parsing the audio data to extract a first audio parameter from the audio data when the audio data is detected from the transport stream and extracting a second audio parameter from the broadcast related information by parsing the broadcast related information; A decoder for assigning a highest priority to the first audio parameter among the first audio parameter and the second audio parameter and for decoding the audio data based on the first audio parameter assigned the highest priority; And a controller for outputting the decoded audio data through a sound output unit. 6. The method of claim 5, Wherein the audio parameter is an audio parameter extracted from a low overhead audio stream included in the audio data. 7. The method according to claim 6, Is an audio parameter extracted from a program map table. 6. The apparatus of claim 5, Wherein the decoding unit decodes the audio data based on the first extracted audio parameter among the first audio parameter and the second audio parameter. Extracting audio data and broadcast related information included in the digital broadcast signal; Extracting a first audio parameter from the audio data and extracting a second audio parameter from the broadcast-related information; And assigning a highest priority to the first audio parameter among the first audio parameter and the second audio parameter and decoding the audio data based on the first audio parameter having the highest priority. Gt; 10. The method according to claim 9, Wherein the audio parameter is an audio parameter extracted by parsing a low overhead audio stream header included in the audio data. The method of claim 9, further comprising decoding the audio data based on an audio parameter first extracted from the first audio parameter and the second audio parameter. 10. The method according to claim 9, Is an audio parameter included in a program map table. Receiving a broadcast signal from a base station via an antenna; Converting a broadcast signal received by the tuner into a transport stream; Extracting audio and video packets and broadcast-related information from the transport stream; Parsing the audio data to extract a first audio parameter from the audio data and parsing the broadcast related information to extract a second audio parameter from the broadcast related information if audio data is detected from the transport stream; Assigning a highest priority to the first audio parameter among the first audio parameter and the second audio parameter and decoding the audio data based on the first audio parameter given the highest priority; And outputting the decoded audio data through a voice output unit. 14. The apparatus of claim 13, wherein the first audio parameter comprises: Wherein the audio parameter is an audio parameter extracted from a low overhead audio stream included in the audio data. 14. The method of claim 13, Wherein the audio parameter is an audio parameter extracted from the program map table. 14. The method of claim 13, further comprising decoding the audio data based on an audio parameter first extracted from the first audio parameter and the second audio parameter.

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