JP2004128884A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver whereby a user can recognize broadcast contents in a form of video image prior to channel selection operation as to a plurality of channels in one transport stream. <P>SOLUTION: When receiving video data in a capturing system from an AV decoder 4 and receives a capture command from a CPU 13, a capturing processing circuit 18 generates still picture data on the basis of the video data and stores the still picture data to a capturing memory 19. A scaler / OSD circuit 12 reduces the still picture of each channel and displays the reduced image on a screen. A user views a reduced still picture of each channel and can select a channel by selecting a desired still picture. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a digital broadcast receiving device for receiving digital broadcast.
[0002]
[Prior art]
A digital broadcast receiving device that receives digital broadcasts using satellites and terrestrial waves selects an arbitrary broadcast wave from a plurality of broadcast waves received through a dedicated antenna or a terrestrial antenna with a tuner, and selects the selected broadcast wave. An arbitrary channel is selected from a plurality of channels included in the wave by demultiplex processing, a digital signal of the selected channel is extracted, and a video / audio signal can be output by decoding the digital signal.
[0003]
By the way, in such digital broadcasting, it has been considered that a preset key is assigned to each broadcaster, and a channel of a desired broadcaster can be directly selected simply by operating the preset key. As a related art related to this, there is a technique of selecting one channel from a plurality of channels of one broadcaster assigned to a predetermined button (see Patent Document 1).
[0004]
[Patent Document 1]
JP 10-149451 A
[Problems to be solved by the invention]
[0006]
However, as described above, even if one channel is selected from a plurality of channels of one broadcaster (one transport stream) assigned in correspondence with a predetermined button, the broadcaster can be selected. In order to know the broadcast content of another channel, the user must perform a channel selection operation using an up / down key or the like, and cannot know the broadcast content of the channel in video prior to the channel selection operation. Was.
[0007]
The present invention has been made in view of the above circumstances, and has as its object to provide a digital broadcast receiving apparatus capable of knowing broadcast contents of a plurality of channels in one transport stream by video prior to a channel selection operation.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a digital broadcast receiving apparatus according to the present invention includes means for sequentially capturing video of each channel in the same transport stream to record a still image, and reducing the still image of each channel. Means for displaying a screen by screen, means for determining which one of the still images of each channel displayed by the user the user has designated, and processing for selecting a channel corresponding to the designated still image and receiving. Means for displaying a moving image on the entire screen.
[0009]
With the above configuration, a reduced still image is displayed on the screen for each channel in the same transport stream, and the user selects a channel (reduced still image) from among them. You will be able to know the content by video.
[0010]
Further, the digital broadcast receiving apparatus of the present invention includes a means for sequentially capturing video of each channel in the same transport stream and recording a still image, a means for reducing the still image of each channel and displaying it on a screen, A means for determining which of the still images of each channel displayed on the screen the user has designated, and a process of selecting a channel corresponding to the designated still image to perform a process of displaying the received moving image video on a portion of the screen. Means for reducing the size of the image and using it to continue displaying the still image of another channel.
[0011]
Even in such a configuration, it is possible to know the contents of the broadcast by video prior to the channel selection operation. Further, it is possible to watch the moving image video of the selected channel while displaying the reduced still image of another channel. In this configuration, when a predetermined operation is performed by the user, it is preferable that the received moving image video that is reduced and displayed using a part of the screen is displayed using the entire screen.
[0012]
It is preferable that the still image is recorded after being reduced in size in order to save the memory capacity. In addition, it is preferable that when all the still images cannot be displayed on the screen, a non-display still image can be displayed by a scroll operation.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. Here, a configuration for receiving terrestrial digital broadcasting is illustrated. FIG. 1 is a block diagram showing a digital broadcast receiving apparatus 30 of this embodiment, FIG. 2 is a flowchart showing control contents, and FIG. 3 is an explanatory diagram showing a screen display example.
[0014]
The antenna 1 is arranged outdoors in a predetermined direction, and receives a digital broadcast signal transmitted from a terrestrial broadcast station. The antenna 1 generally includes a frequency converter, and supplies a received / frequency-converted signal to a tuner 2.
[0015]
The tuner 2 extracts a signal of a specific frequency from high-frequency digital modulation signals including video and audio data. That is, a process of selecting one from a plurality of digital broadcast transponders is performed. Further, the tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, and the like, and thereby demodulates the selected digital modulation signal and outputs a transport stream.
[0016]
A demultiplexer (DEMUX) 3 separates the transport stream into a video stream of MPEG2 (Moving Picture Experts Group2), an audio stream, a PSI / SI (Program Specific Information / Service Information), and the like. The demultiplexer 3 supplies the video stream and the audio stream to the AV decoder 4, and supplies program table data (program name, program start time, program content information, program genre information, etc.) included in the PSI / SI to the CPU 13. , And supplies the data broadcast data to the BML (XML) browser 20. As described above, a plurality of channels are multiplexed in the transport stream, and a process for selecting an arbitrary channel from among the channels is performed by selecting an arbitrary channel from the PSI / SI in the transport stream. It becomes possible by extracting data such as which packet ID is multiplexed. Also, the selection of the transport stream can be performed based on the PSI / SI information.
[0017]
In this embodiment, a video stream is output from the demultiplexer 3 in two systems. One system is used for normal moving image video reproduction, and the other system is used for capturing described later.
[0018]
The AV decoder 4 includes a video decoder for decoding a video stream and an audio decoder for decoding an audio stream. The video decoder obtains a quantization coefficient and a motion vector by decoding the input variable-length code, and performs an inverse DCT transform, a motion compensation control based on the motion vector, and the like. The audio decoder decodes the input coded signal to generate audio data. The video data is output to the video processing circuit 5 via the scaler / OSD circuit 12, and is also output to the capturing processing circuit 18. The audio data is output to the audio processing circuit 6.
[0019]
The capturing processing circuit 18 receives the video data in the capturing system from the AV decoder 4 and, upon receiving a capture command from the CPU 13, generates still image data based on the video data and stores it in the capturing memory 19. I do. Note that an I picture can be used as the still image data. Still image data may be reduced still image data. Further, upon receiving a read command from the CPU 13, the capturing processing circuit 18 reads out still image data from the capturing memory 19 and outputs it to the scaler / OSD circuit 12.
[0020]
The video processing circuit 5 receives the video data that has passed through the scaler / OSD circuit 12, performs D / A conversion, and converts the data into, for example, a composite video signal. The audio processing circuit 6 receives the audio data output from the decoder 4, performs D / A conversion, and generates, for example, a right (R) sound analog signal and a left (L) sound analog signal.
[0021]
The video output 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, a video output terminal, and the like). The output unit is provided with a video / audio code 17 and a monitor including a picture tube 16a and a speaker 16b. 16 are connected.
[0022]
The scaler / OSD circuit 12 is a circuit that generates video data based on character information and color information instructed to be output from the browser 20 and the CPU 13 and incorporates the still image data received from the capturing processing circuit 18. The circuit 12 can perform an EPG (Electronic Program Guide) display, a data broadcast display, a menu screen display, and the like based on the program information, and can also perform a screen display for selecting a channel still image described later.
[0023]
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, a 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 the signal light into an electric signal, and supplies the electric signal to the CPU 13.
[0024]
The memory (RAM, EEPROM, flash memory, etc.) 14 stores program guide data for displaying an EPG screen and the like, as well as data indicating to which channel captured still image data corresponds. Is stored.
[0025]
The modem 22 operates under the control of the CPU 13 in a dial-up connection for transmitting, for example, billing information of a pay broadcast, transmission data in an interactive data service, and the like.
[0026]
The IC card 21A stores, in its built-in memory, key information for enabling pay broadcast viewing, purchase history information of a PPV program to be charged for each program, and the like.
[0027]
The CPU 13 performs overall control of the digital broadcast receiving apparatus 30. In particular, as the control according to the present invention, the CPU 13 performs a process of selecting a channel still image. Hereinafter, the channel still image selection process will be described with reference to the flowchart of FIG.
[0028]
{Circle around (1)} When a predetermined key of the remote control transmitter 10 is operated, for example, the CPU 13 sends to the demultiplexer 3 and the capturing processing circuit 18 a capture command for video of all channels in the same transport as the currently selected program. (Step S1, Step S2, Step S3). At this time, in the demultiplexer 3, for example, the channels in the same transport are sequentially switched (packets are sequentially selected) and output at regular time intervals (step S5). The video stream of the selected channel is provided to the capturing processing circuit 18 via the AV decoder 4. The capturing processing circuit 18 generates still image data in synchronization with the channel switching timing and stores the still image data in the capturing memory 19 (step S4).
[0029]
{Circle around (2)} In the above process, the CPU 13 generates correspondence information between the channel selection information of each channel in the same transport and the still image data stored in the capturing memory 19 and stores the information in the memory 14 (step S4). ).
[0030]
{Circle around (3)} In addition to the above processing, the CPU 13 instructs the capturing processing circuit 18 to read out still image data of each channel, and issues a screen display instruction for selecting a channel still image to the scaler / OSD circuit 12 ( Step S6). The scaler / OSD circuit 12 that has received the screen display instruction receives the still image data of each channel from the capturing processing circuit 18 and, for example, includes the currently selected channel as shown in FIG. To display a reduced still image for all.
[0031]
{Circle around (4)} The CPU 13 waits for the operation information of the direction keys and the determination key in the remote control transmitter 10. When a command is issued and the operation information of the enter key is obtained, it is determined that the channel corresponding to the still image on which the double frame drawing process has been performed has been selected. When this determination is made, the channel selection information of the selected still image is read from the memory 14 and an instruction is given to the demultiplexer 3 to select the channel.
[0032]
(5) The CPU 13 gives the above-described channel selection command to the demultiplexer 3 and issues a command to the scaler / OSD circuit 12 to cancel the screen display of the channel still image selection. With this command, the received video for the selected channel is displayed on the entire screen.
[0033]
In the above example, as shown in FIG. 3A, the reduced still image display is performed for all the channels including the currently selected channel. However, the present invention is not limited to this. As shown in (b), a reduced moving image is displayed for the currently selected channel, and a reduced still image is displayed for the other channels based on the still image data of each channel received from the capturing processing circuit 18. It may be. Then, when a still image is selected by the user in this state, the channel corresponding to the still image is displayed as a reduced moving image, and the previous channel displaying the reduced moving image is subjected to a switching process of displaying a still image. I have. Further, when a user performs a predetermined operation using a remote control transmitter or the like, the display is switched from the reduced moving image display to the entire screen moving image display.
[0034]
Further, in the above example, only the reduced still image or the reduced moving image is displayed. However, the description of the channel (for example, main, sub, etc.) may be displayed in characters near each image. When all the reduced still images cannot be displayed on the screen, for example, a scroll bar is displayed on the right edge of the screen, and the scroll bar is configured to be operated by, for example, an up-down key of a remote control transmitter, and the scroll is performed. The operation causes the display screen content to shift up and down so that a non-display still image is displayed.
[0035]
【The invention's effect】
As described above, according to the present invention, for a plurality of channels in one transport stream, the broadcast contents can be known by video prior to the channel selection operation, and there is an effect that the convenience for the user is improved. .
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital broadcast receiving apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing processing contents.
FIGS. 3A and 3B are explanatory diagrams showing screen display examples, respectively.
[Explanation of symbols]
1 antenna 2 digital tuner 3 descrambler 4 AV decoder 13 CPU
18 Capture processing circuit 19 Capture memory

Claims (5)

A means for sequentially capturing video of each channel in the same transport stream to record a still image, a means for reducing the still image of each channel and displaying it on the screen, and a means for displaying the still image of each channel displayed on the screen. Means for determining which one the user has designated, and means for performing a process of selecting a channel corresponding to the designated still image and displaying the received moving image video on the entire screen, Digital broadcast receiving device. A means for sequentially capturing video of each channel in the same transport stream to record a still image, a means for reducing the still image of each channel and displaying it on the screen, and a means for displaying the still image of each channel displayed on the screen. Means for deciding which one the user has specified, and processing for selecting a channel corresponding to the specified still image to reduce and display the received moving image using a portion of the screen, and to freeze the other channels. Means for continuing image display. 3. The digital broadcast receiving apparatus according to claim 2, wherein when a predetermined operation is performed by a user, a received moving image image that is reduced and displayed using a part of the screen is displayed using the entire screen. Digital broadcast receiver characterized by the following. 4. The digital broadcast receiving apparatus according to claim 1, wherein the still image is reduced and recorded. 5. The digital broadcast receiving apparatus according to claim 1, wherein a non-display still image is displayed by a scroll operation when all the still images cannot be displayed on the screen. A digital broadcast receiving apparatus characterized by the above-mentioned.

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