JP4179812B2 - Digital broadcast receiver and download system - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a digital broadcast receiving apparatus and a download system for receiving terrestrial digital broadcasting.
[0002]
[Prior art]
In digital broadcasting using terrestrial waves, a transmission method called OFDM (Orthogonal Frequency Division Multiplexing) is used. As a digital broadcast receiving apparatus that receives the broadcast waves, other than a receiving apparatus fixedly installed in a house. In addition, it is assumed to be used as a mobile device with a reception function added (hereinafter referred to as a portable device) or a device intended to be used in a moving body such as a car (hereinafter referred to as an in-vehicle device). ing. For this reason, it is considered to perform hierarchical transmission using a plurality of different transmission path encodings as well as broadcasting with a single transmission path encoding. In this hierarchical transmission, a maximum of three hierarchies are used, and there are a strong hierarchy, a middle hierarchy, and a weak hierarchy in order from the lowest required C / N ratio. Then, strong hierarchical broadcasting is performed for portable devices, and strong hierarchical broadcasting and middle hierarchical broadcasting are performed for in-vehicle devices. For this reason, the portable device and the vehicle-mounted device are not configured to receive weak hierarchical broadcasts.
[0003]
[Problems to be solved by the invention]
By the way, a digital broadcast receiving apparatus can be provided with a software update function using broadcast waves. Also in terrestrial digital broadcasting, software update information (SDTT: Software Download Trigger Table) is broadcast on the strong hierarchy and weak hierarchy, but the software itself to be updated is broadcast on the weak hierarchy, so that the portable device and in-vehicle use In the apparatus, software cannot be updated using broadcast waves. For example, it is considered to download through a download apparatus installed in a store or the like.
[0004]
In view of the above circumstances, an object of the present invention is to enable downloading of updated software without using a download device installed in a store or the like while being a portable device or a vehicle-mounted device.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, the digital broadcast receiving apparatus of the present invention (hereinafter referred to as the first configuration in this section) is a digital that can acquire update software and / or update data placed on a weak hierarchy of digital broadcast waves. A broadcast receiving device that communicates with other digital broadcast receiving devices capable of receiving a strong layer or a strong layer and a middle layer of a digital broadcast wave, and downloads from the other digital broadcast receiving device. Means for acquiring information, and means for transmitting update software and / or update data downloaded based on the download related information to the other digital broadcast receiving apparatus.
[0006]
The digital broadcast receiving apparatus configured as described above downloads on behalf of another digital broadcast receiving apparatus that cannot be downloaded by itself, and provides the downloaded update software and / or update data to the other digital broadcast receiving apparatus. Therefore, the other digital broadcast receiving apparatus can perform the download without using the download apparatus installed in the store or the like.
[0007]
When the update software and / or update data for the other digital broadcast receiving apparatus is downloaded, a message to that effect may be output (hereinafter referred to as the second in this section). Called composition).
[0008]
A digital broadcast receiving apparatus (hereinafter referred to as a third configuration in this section) of the present invention is a digital broadcast receiving apparatus capable of receiving a strong layer or a strong layer and a middle layer of a digital broadcast wave. Means for communicating with other digital broadcast receivers capable of acquiring update software and / or update data placed in a weak wave hierarchy, and transmitting the download-related information; and Means for obtaining updated software and / or update data downloaded based on the download related information.
[0009]
In the digital broadcast receiving apparatus having the above configuration, although it cannot be downloaded by itself, it can receive update software and / or update data downloaded by another digital broadcast receiving apparatus that can be downloaded. The receiving device can perform the download regardless of the download device installed in the store or the like.
[0010]
It may be configured to output a message to that effect when it is determined that there is an update upon receiving the software update information of the strong hierarchy (hereinafter referred to as the fourth configuration in this section). Further, it may be configured to transmit the download related information including the authentication code (hereinafter referred to as the fifth configuration in this section).
[0011]
The download system according to the present invention is characterized by comprising the digital broadcast receiver of the first or second configuration and the digital broadcast receiver of any of the third to fifth configurations.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram showing a digital broadcast receiving apparatus (in-house type) 30 that can acquire update software and / or update data placed on a weak level of terrestrial digital broadcast waves, and FIG. FIG. 3 is a block diagram showing a digital broadcast receiver (portable device) 31 capable of receiving a strong hierarchy, and FIG. 3 is an explanation showing a download system comprising the digital broadcast receiver 30 and the digital broadcast receiver 31. FIG.
[0013]
In FIG. 1, a terrestrial antenna 1 is arranged outdoors in a predetermined direction, and receives a terrestrial digital broadcast signal. The terrestrial antenna 1 gives the received signal to the terrestrial digital tuner 2.
[0014]
The terrestrial digital tuner 2 extracts a signal having a specific frequency from the high-frequency digital modulation signal including video / audio data. The terrestrial digital tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, etc., and demodulates the selected digital modulation signal to output a transport stream.
[0015]
The demultiplexer (DEMUX) 3 separates the transport stream into an MPEG2 (Moving Picture Experts Group 2) video stream, an audio stream, and PSI / SI (Program Specific Information / Service Information). The demultiplexer 3 supplies the video stream and the audio stream to the AV decoder 4 and supplies program information included in the PSI / SI to the CPU 13. Note that a plurality of channels are multiplexed in the transport stream, and the process for selecting an arbitrary channel from among these is the packet ID of the arbitrary channel in the transport stream from the PSI / SI. It becomes possible by taking out data such as whether or not it is multiplexed. The transport stream can also be selected based on PSI / SI information.
[0016]
The AV decoder 4 includes a video decoder that decodes a video stream and an audio decoder that decodes an audio stream. The video decoder decodes the input variable length code to obtain a quantization coefficient and a motion vector, and performs inverse DCT conversion, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input encoded signal to generate audio data. The video data generated by the decoding is output to the video processing circuit 5, and the audio data is output to the audio processing circuit 6.
[0017]
The video processing circuit 5 receives video data from the AV decoder 4 and performs D / A conversion, for example, to convert it into a composite video signal. The audio processing circuit 6 receives the audio data output from the AV decoder 4 and performs D / A conversion to generate, for example, a right (R) sound analog signal and a left (L) sound analog signal.
[0018]
The video processing circuit 7 and the audio output circuit 8 include an output resistor, an amplifier, and the like. The AV output terminal 9 is provided with an output unit (a set of left and right audio output terminals and video output terminals, etc.). This output unit is provided with a video / audio code 17 and is provided with a picture tube 16a and a speaker 16b. 16 is connected.
[0019]
The OSD (On Screen Display) circuit 12 outputs video data based on character information and color information instructed to be output from the CPU 13 to the adder 20. The adder 20 performs processing for incorporating the video data into the received video data output from the AV decoder 4. The OSD circuit 12 can display a menu screen and various setting screens.
[0020]
The remote control transmitter 10 is a transmitter for sending a command to the broadcast receiving device 30. When a key (not shown) provided on the remote control transmitter 10 is operated, signal light (remote control signal) indicating a command corresponding to the key is transmitted from a light emitting unit (not shown). The remote control light receiver 11 receives the signal light, converts it into an electric signal, and gives it to the CPU 13.
[0021]
Memory (for example, DRAM, flash ROM, EEPROM, etc.) 14 stores data for displaying the EPG screen, update software for the own device, and / or update data. The hard disk drive (HDD) 15 stores update software and / or update data for another digital broadcast receiver (in this embodiment, a portable digital broadcast receiver 31 (see FIG. 2)). It has come to be.
[0022]
The communication block 18 and the light emitting / receiving unit 19 execute communication using infrared rays. Using this infrared communication function, communication is performed with the portable digital broadcast receiving device 31, and download related information (maker_id, group_id, version_id, authentication code, etc.) is acquired from the portable digital broadcast receiving device 31. It passes to CPU13.
[0023]
The CPU 13 performs overall control in the digital broadcast receiving apparatus 30, and based on the download related information in addition to normal digital broadcast reception processing and update software and / or update data download processing for the own device. The SDTT is monitored, update software and / or update data for the portable digital broadcast receiver 31 is downloaded, and the download data is transmitted to the portable digital broadcast receiver 31.
[0024]
FIG. 2 is a block diagram showing the configuration of the portable digital broadcast receiver 31. This portable digital broadcast receiver 31 is configured to be driven by a battery 221. The portable digital broadcast receiving apparatus 31 displays video on the liquid crystal display panel 202 and outputs sound from the earphone 203. A touch panel 211 is pasted on the liquid crystal display panel 202, and a desired instruction can be given by operating the panel with a touch pen or the like.
[0025]
The terrestrial digital tuner 230 receives a strong hierarchical terrestrial digital broadcast, demodulates it to generate a transport stream, extracts MPEG4 bitstream data by demultiplexing processing, and supplies it to the MPEG4 decoder 204, or PSI. Processing for supplying / SI and the like to the CPU 209 is performed. The MPEG4 decoder 204 decodes the bit stream data to obtain a quantization coefficient and a motion vector, and supplies video data obtained by performing inverse DCT transformation, motion compensation control based on the motion vector, and the like to the graphics controller 205. The graphics controller 205 performs processing such as color adjustment on video data (for example, R, G, B data). The graphics controller 205 also performs processing for displaying characters or the like (operation buttons, menu screen, EPG screen, etc.) output from the CPU 209 on the liquid crystal display panel 202. The audio decoder 206 receives the audio stream in the bit stream from the MPEG4 decoder 204 and decodes it to generate audio data. The SDRAM 210 is used in the above processing of the MPEG4 decoder 204.
[0026]
The LCD controller 207 drives the liquid crystal display panel 202 based on the video data supplied from the graphics controller 205. The D / A converter 208 receives the audio data output from the audio decoder 206, performs D / A conversion, generates a right (R) sound analog signal and a left (L) sound analog signal to generate the earphone 203. To give.
[0027]
Operation information for the touch panel 211 is given to the CPU 209 via the dedicated interface 212 and the system bus 213. The CPU 209 grasps the contents of the command based on the correspondence between the operation information and the display of the operation buttons on the liquid crystal display panel 202, and executes necessary processing.
[0028]
The main body key 214 is operation buttons (volume, channel, etc.) related to viewing. Operation information for the main body key 214 is given to the CPU 209 via the interface 215 and the system bus 213. The CPU 209 executes necessary processing based on the operation information.
[0029]
Further, a communication block 216 and a light emitting / receiving unit 20 for performing infrared communication are provided. Further, a flash ROM 218 and an SDRAM 219 are also provided.
[0030]
The CPU 209 performs overall control in the portable digital broadcast receiving apparatus 31. In addition to normal digital broadcast reception processing, the CPU 209 uses the SDTT monitoring processing for the own device, the communication block 216, and the light emitting / receiving unit 20. Data communication processing and the like are performed with the digital broadcast receiver 30.
[0031]
The portable digital broadcast receiving device 31 monitors the SDTT of the strong hierarchy in a normal state, analyzes the received SDTT when it is received, and determines that there is software update by the digital broadcast wave, download related information ( maker_id, group_id, version_id, authentication code, etc.). At the time of forming this state, for example, that fact may be displayed on the liquid crystal screen, or an LED (not shown) may be caused to emit light.
[0032]
When the user learns of the above state formation, the user turns on the digital broadcast receiving device 30 installed in the house and selects, for example, an item “download for another digital broadcast receiving device” on the menu screen. Then, a determination key (not shown) of the remote control transmitter 10 is pressed to make it possible to perform infrared communication. The portable digital broadcast receiver 31 also performs operations (start button operation, menu operation, etc.) for starting infrared communication. As a result, infrared communication is performed between the home-installed digital broadcast receiver 30 and the portable digital broadcast receiver 31, and the portable digital broadcast receiver 31 moves to the home-installed digital broadcast receiver 30. The download related information is transferred.
[0033]
The home-installed digital broadcast receiver 30 receives the weak hierarchy SDTT for the portable digital broadcast receiver 31 based on the download related information, and acquires a schedule in which group_id and version_id match the update information. Based on this schedule, data including software data such as DII (Download Information Indication message) and DDB (Download Data Block) is downloaded, and the downloaded data is stored in the hard disk drive (HDD) 15. After the download data has been stored, for example, a message to that effect may be displayed on the screen, or an LED (not shown) may be caused to emit light.
[0034]
When the user knows that the download has been completed, the user turns on the power of the portable digital broadcast receiver 31 and selects an item such as “receive download data” on the menu screen, for example, so that infrared communication can be performed. The operation for starting infrared communication is performed also in the digital broadcast receiving apparatus 30 installed in the house. As a result, communication is performed between the home-installed digital broadcast receiver 30 and the portable digital broadcast receiver 31. In this embodiment, the download related information together with the download data is transmitted from the digital broadcast receiving apparatus 30 installed in the house to the portable digital broadcast receiving apparatus 31.
[0035]
Receiving the download data and the download related information, the portable digital broadcast receiving apparatus 31 processes the DDB data after confirming the consistency by checking whether the DDB data is correct based on the download related information and DII in the download data. Then, data is written into the memory (flash ROM) 14 and restarted. Thereby, software update and data update are performed in the portable digital broadcast receiver 31. Here, the download-related information includes an authentication code, and this authentication code can prevent a situation in which download data for another portable digital broadcast receiver of the same model is erroneously delivered, Furthermore, the protection against actions such as data falsification is improved.
[0036]
In the above embodiment, the portable digital broadcast receiving apparatus 31 is shown, but the present invention can also be applied to a mobile digital broadcast receiving apparatus (strong hierarchy and middle hierarchy reception). In addition, the download data is transmitted by infrared communication. However, the present invention is not limited to this, and other wireless communication means may be used, or wired communication means may be used.
[0037]
【The invention's effect】
As described above, according to the present invention, it is possible to download updated software without using a download device installed in a store or the like while being a portable or in-vehicle digital broadcast receiving device.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital broadcast receiving apparatus installed in a house according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a portable digital broadcast receiver according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing a download system according to an embodiment of the present invention.
[Explanation of symbols]
2,230 Terrestrial digital tuner 13,209 CPU
18, 216 Communication block 19, 20 Light emitting / receiving unit 30 Digital broadcast receiver 31 Portable digital broadcast receiver

Claims (6)

A digital broadcast receiving apparatus capable of acquiring update software and / or update data loaded on a weak hierarchy of a digital broadcast wave, and another digital broadcast capable of receiving a strong hierarchy or a strong hierarchy and a middle hierarchy of a digital broadcast wave Based on the download related information, means for communicating with the receiving device using specific communication means to acquire download related information including receiver identification information of the device itself from the other digital broadcast receiving device. And a means for transmitting the downloaded update software and / or update data to the other digital broadcast reception apparatus using the specific communication means.   2. The digital broadcast receiving apparatus according to claim 1, wherein when a download of update software and / or update data for the other digital broadcast reception apparatus is performed, a message to that effect is output. A digital broadcast receiver characterized by the above. A digital broadcast receiving apparatus capable of receiving a strong hierarchy of a digital broadcast wave or a strong hierarchy and a middle hierarchy, and other digital broadcasts capable of acquiring update software and / or update data loaded on a weak hierarchy of a digital broadcast wave Means for communicating with the receiving apparatus using specific communication means to transmit download related information including receiver identification information of the apparatus itself, and the other digital broadcast receiving apparatus is based on the download related information. Means for acquiring downloaded update software and / or update data using said specific communication means; and a digital broadcast receiving apparatus.   4. The digital broadcast receiving apparatus according to claim 3, wherein a message to that effect is output when it is determined that there is an update by receiving software update information of a strong hierarchy. Digital broadcast receiver. 5. The digital broadcast receiving apparatus according to claim 3, wherein the digital broadcast receiving apparatus is configured to transmit the download related information including an authentication code.   A download system comprising the digital broadcast receiver according to claim 1 and the digital broadcast receiver according to any one of claims 3 to 5.

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