JPH1175164A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the digital broadcast receiver to realize a still image information service with excellent response. SOLUTION: The receiver receives a plurality of still image data subject to digital compression sent repetitively from a digital broadcast transmitter and when still image data of a still image selected next to a still image displayed at present are not stored in a main storage device (step S57), till the selection operation by the user is made (step S56), the still image data are stored in the main storage device (step S58). When the selection operation by the user is made, the still image data of a selected still image are expanded by an MPEG decoder (step S55) and the still image is outputted on a television receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus, and more particularly to a receiving apparatus for receiving and displaying digitally compressed data such as video.

[0002]

2. Description of the Related Art In recent years, digital broadcasting in which digitally compressed moving images and sounds are transmitted by transmitting means such as satellites and CATV has been performed. Furthermore, a still image information providing service for transmitting a plurality of previously associated still images by digital broadcasting so that a user can view a required still image by interactive operation has been considered. I have.
An operation when using the still image information providing service will be described with reference to FIG. FIG. 17 is a diagram illustrating an operation image of selecting a still image. While the still image 11 of the “service menu” is displayed, the user
By selecting "4. Weather Forecast", "Weather Forecast"
Is displayed. Hereinafter, a conventional technique for providing the still image information providing service will be described with reference to FIG.
7, and will be described with reference to FIGS. FIG. 18 is a diagram illustrating an image of still image data transmitted by the digital broadcast transmitting apparatus. A digital broadcast transmitting apparatus repeatedly transmits a plurality of compressed still image data. The figure shows that the first still image 11 of the "service menu" and the seventh still image 12 of the "weather forecast" of the 150 still image data 20 repeatedly transmitted are shown.

FIG. 19 shows a conventional digital broadcast receiving apparatus 1.
FIG. 2 is a block diagram showing a configuration of a 00. The conventional digital broadcast receiving apparatus 100 is an apparatus that receives data transmitted from a digital broadcast transmitting apparatus and displays a still image in accordance with a user operation, and includes a tuner & demodulator 102, a transport decoder 103, Local memory 104 and M
A PEG decoder 105, a local memory 106, and a CPU 10 for controlling each unit in the apparatus in accordance with a user operation
9 and a main memory 110. Here, the tuner & demodulation unit 102 receives and demodulates the data 101 transmitted from the digital broadcast transmitting apparatus side by selecting a satellite to be received or the like, and demodulates the data.
3 is input. The transport decoder 103 separates and extracts a transport stream specified by the CPU 109 from data received from the tuner & demodulation unit 102. The transmitted data 101 is obtained by time-division multiplexing a large number of encoded streams called transport streams with relatively short fixed-length packets. The stream type of the transport stream includes “video”, “audio”, “data”, and the like. When the stream type is “video” or “audio”, the transport decoder 103 converts the video and audio into the MPEG decoder 10.
5 and the MPEG decoder 105 expands and displays the video and audio. When the stream type is “data”, the transport decoder 103
Stores this data in the local memory 104 attached to the transport decoder 103. Local memory 10
4 can be accessed from the CPU 109.

[0004] A conventional digital broadcast receiving apparatus 100 converts a still image data transmitted from a digital broadcast transmitting apparatus in a stream type of “video” into an MPEG decoder 1.
05 for display. The display of the still image data does not display all the transmitted still images, but displays only one image according to the user's selection. In other words, the CPU 109 controls the MPEG decoder 105 in accordance with the user's selection, and stops the display at the timing when one target still image is displayed. If the CPU 109 does not perform any special control, the MPEG decoder 105 receives a plurality of repeatedly sent still image data, and the MPEG decoder 105 repeatedly displays all still images as a moving image. become. The conventional digital broadcast transmitting apparatus transmits a still image as a “video” stream type in order to cause the digital broadcast receiving apparatus 100 to perform the above-described processing, and transmits data indicating an association between the still images. It is transmitted as a stream type of "data". Here, the data indicating the association between the still images is
For example, it indicates that the still image 11 of the “service menu” and the still image 12 of the “weather forecast” in FIG. 17 are related, and an identifier is used to identify each still image. Refers to information indicating the relationship between pictures.
Hereinafter, data indicating the association between the still images is referred to as still image related data. Therefore, the transport decoder 103 of the digital broadcast receiving apparatus 100 stores the still image related data transmitted from the digital broadcast transmitting apparatus in the local memory 104, and the CPU 109
04 to access the still image related data to the main storage 110.
To be stored. Further, the transport decoder 103 of the digital broadcast receiving apparatus 100 inputs the compressed still image data transmitted from the digital broadcast transmitting apparatus to the MPEG decoder 105 via the compressed data stream dedicated input port 107. The MPEG decoder 105 converts the data signal input from the transport decoder 103 into 8
A serial / parallel conversion circuit 111 for converting the data stored in the local memory 106 into a bit-parallel signal, an expansion circuit 113 for expanding video and audio data stored in the local memory 106 and storing the data in the local memory 106, And a display circuit 114 for displaying.

Therefore, the compressed still image data input to the MPEG decoder 105 is stored in the local memory 1
06, expanded by the expansion circuit 113, stored again in the local memory 106, and displayed by the display circuit 114. Here, display by the MPEG decoder 105 means outputting a signal for TV output. The CPU 109 accepts the operation of the user, refers to the still image related data stored in the main memory 110, acquires the identifier of the still image selected by the operation of the user,
The PEG decoder 105 is instructed to stop at the timing when the data of the still image with the identifier is displayed. For example, when the still image 11 shown in FIG. 17 is displayed,
When the user selects “4. Weather forecast”, the CPU 1
In step 09, the identifier of the still image corresponding to “4. Weather forecast” is acquired with reference to the main memory 110, and the identifier is notified to the MPEG decoder 105 to display the still image 12. Instruct to stop while displaying. In response, the MPEG decoder 105 thereafter
The compressed data of the transmitted still image is checked, and the display is stopped while the still image 12 is displayed. Thus, the conventional digital broadcast receiving apparatus 100 allows a user to browse necessary still image information by interactive operation.

[0006]

However, the conventional digital broadcast receiving apparatus has a problem that it takes a long time to display a still image selected by a user's operation. For example, when data of 150 still images are repeatedly transmitted from the digital broadcast transmitting apparatus side, a maximum of 150 images from the time when the user makes a selection to the time when the selected still image is displayed is displayed. It takes time to send a message. Assuming that transmission of 150 sheets takes 5 seconds, the user has to wait 5 seconds. In view of the foregoing, the present invention has been made in consideration of the above circumstances, and has been made in consideration of the above circumstances. The purpose is to provide.

[0007]

In order to achieve the above object, a digital broadcast receiving apparatus according to the present invention receives a plurality of still image data repeatedly transmitted from a digital broadcast transmitting apparatus, and receives A digital broadcast receiving apparatus for displaying one designated still image, comprising a storage unit, a receiving unit for sequentially receiving a plurality of the still image data, and one or a plurality of units which will be designated by a user. A prediction unit for predicting a still image prior to the designation, and a still image for capturing still image data of the still image predicted by the prediction unit among the plurality of still image data received by the reception unit into the storage unit Image capturing means, designation receiving means for receiving a still image designation by a user,
The still image is displayed based on still image data of one still image specified by the user received by the specification receiving unit among one or a plurality of still image data stored in the storage unit. And display means for displaying the information. With the above configuration, the digital broadcast receiving apparatus according to the present invention receives the plurality of still image data when a plurality of still image data are transmitted from the digital broadcast transmitting apparatus, and receives the plurality of still image data. Predict one or more of the choices that the user will make,
Since the information is stored in the storage unit prior to the user's selection operation, when the user instructs the display of a certain still image by the selection operation, the probability of quickly displaying the still image is increased.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. <Embodiment 1> Hereinafter, Embodiment 1 of the digital broadcast receiving apparatus according to the present invention will be described. FIG. 1 is a block diagram showing a configuration of digital broadcast receiving apparatus 600 according to Embodiment 1 of the present invention. Digital broadcast receiving device 6
Reference numeral 00 denotes a device that receives digitally compressed data transmitted from a digital broadcast transmitting device, extracts necessary information, and displays a still image in response to a user's interactive operation. Demodulation section 602, transport decoder 603, transport decoder 603
, An MPEG decoder 605, a local memory 606 attached to the MPEG decoder 605, a CPU 609 for controlling each unit of the digital broadcast receiving apparatus according to a user operation, and a CPU 609.
And a main memory 610 accessed from the server. here,
The main memory 610 stores various programs for controlling the CPU 609 to realize the functions of the entire digital broadcast receiving apparatus 600, but may also store other various data.

The CPU 609 can detect a user's operation performed through a remote controller or other input means. In this regard, a general household appliance having a CPU receives the user's operation, It is the same as performing control of each unit in accordance with. Tuner & demodulation unit 602
Is used to select and demodulate the transmitted data.
The MPEG-2 transport stream specified by the PU 609 is received and output to the transport decoder 603. The data transmitted from the digital broadcast transmitting apparatus is MPEG2 (Moving Picture).
MPEG2 transport stream digitally compressed according to the Experts Group 2) standard. This MPEG2 transport stream has 18
It is multiplexed by an 8-byte fixed-length transport packet, and is a multiplex of a plurality of transport streams such as video and audio. The transport decoder 603 separates and extracts a specific transport stream from the received data using the packet identifier (PID) as a filter condition under the control of the CPU 609. That is, the CPU 609 specifies the filter condition for the transport decoder 603 to extract necessary data to the transport decoder 603 and store the data in the local memory 604. To transfer the necessary data.

Here, the data transmitted from the digital broadcast transmitting apparatus includes ISO / IEC13818-1 (hereinafter referred to as MPEG2 system standard) and DVB-SI.
(Digital Video Brodcast
Assuming that it conforms to the Service Information (Singing Information Service) standard, the CPU
Reference numeral 609 denotes a PAT (Program Associate) of a transponder (satellite repeater) currently receiving.
n Table), since the PID of the PAT is defined in advance as 0, the transport decoder 60
3 specifies a filter condition of PID = 0 and causes PAT to be extracted. PAT includes PMT (Program Map)
Table), the PID of the
PU609 is the PID of the PMT corresponding to the program to be used.
, And designates this as a filter condition, causes the transport decoder 603 to extract the PMT, and obtains the PID of the required stream data such as “video”, “audio”, and “data” by referring to the PMT. Then, using this as a filter condition, it is possible to separate and extract necessary stream data of any type of “video”, “audio”, and “data”. Of the stream data, those stored as private sections conforming to the MPEG2 standard are specified using section IDs instead of the above-mentioned PIDs. However, here, for simplicity of description, all PIDs are used. The description will be made assuming that it can be specified. When the stream type of the transport stream is “video” or “audio”, the transport decoder 603 inputs the video and audio to the MPEG decoder 605, and the MPEG decoder 605 expands the video and audio. indicate. If the stream type is “data”, the transport decoder 603 stores the data in the local memory 604 attached to the transport decoder 603.

The MPEG decoder 605 has a CPU 609.
CPU access port 608 that accepts input from
A byte conversion circuit 612 for converting 32-bit parallel data input from the CPU access port 608 into four 8-bit parallel data; And a display circuit 614 for displaying a still image based on the still image data stored in the local memory 606. Hereinafter, the operation of digital broadcast receiving apparatus 600 having the above configuration will be described. In the first embodiment, the digital broadcast transmitting apparatus repeatedly transmits compressed still image data corresponding to 150 still images (see FIG. 18). However, the digital broadcast transmitting apparatus according to the first embodiment transmits not only still image related data but also still image data as a “data” stream type, unlike the above-described conventional digital broadcasting transmitting apparatus. ing. The tuner & demodulation unit 602 of the digital broadcast receiving apparatus 600 sequentially receives and demodulates the repeatedly transmitted data, and inputs the data to the transport decoder 603. In response to this, the transport decoder 603 stores, in the local memory 604, the still image-related data transmitted in the stream type of “data” under the control of the CPU 609.

The CPU 609 transfers the still image related data from the local memory 604 to the main memory 610 and refers to the still image related data to transfer the necessary still image data as needed according to the operation of the user. By controlling the decoder 603, the data is extracted from the received data and stored in the main memory 610. Digital broadcast receiving device 6
00 indicates that the first still image of the plurality of transmitted still images is displayed immediately after activation, so that the main storage 610 stores the still image related data and the first still image. The third still image data and other necessary still image data are stored. Note that the CPU 609 predicts still image data that may be selected by the user and causes the transport decoder 603 to extract the still image data.
The prediction control operation of the CPU 609 will be described later.
Immediately after the digital broadcast receiving device 600 is started, the CPU 609 stores the first still image data from the main storage 610 to display the first still image among the plurality of transmitted still images. The data is extracted and input to the byte conversion circuit 612 via the CPU access port 608. MP
The EG decoder 605 converts the first still image data input to the byte conversion circuit 612 into the local memory 606
The image is expanded by the expansion circuit 613 using, and displayed by the display circuit 614.

As a result, a still image 11 shown in FIG. 17 is displayed on the display device connected to the digital broadcast receiving device 600. Thereafter, when the user performs an operation of selecting “4. Weather forecast”, the CPU 609 accepts the operation of the user, refers to the still image related data stored in the main memory 610, and The data of the still picture selected by the operation of
MPEG decoder 605 via access port 608
The data is input to the internal byte conversion circuit 612. Main memory 610
If the still image-related data stored in the first still image is such that “7. Still weather forecast” is selected by the user in the first still image, the seventh still image is displayed. The CPU 609 inputs the seventh still image data to the byte conversion circuit 612. The MPEG decoder 605 stores the still image data input to the byte conversion circuit 612 in the local memory 606, and
And re-stored in the local memory 606, and displayed on the display circuit 614. Thereby, the digital broadcast receiving device 6
The still image 12 of FIG. 17 is displayed on the display device connected to 00.

(Byte Conversion Circuit) Hereinafter, the byte conversion circuit 612 will be described in detail. FIG. 2 is a block diagram showing the internal configuration of the byte conversion circuit 612. The byte conversion circuit 612 includes a 32-bit input buffer 702 for temporarily storing input data, a data selector 703 in 8-bit units, and a counter 70 for determining data to be selected and sequentially transmitting data.
7. An output order determination register 705 for determining whether to advance the counter in ascending or descending order. The CPU 609 handles four bytes as one word, and can access the main memory 610 in units of four bytes to perform high-speed processing.
8 to the byte conversion circuit 612.
Performed in 2-bit parallel. A decompression circuit 613 that takes in the data output from the byte conversion circuit 612 as a result can take in 8-bit data in parallel. The 32-bit input data 701 input from the CPU 609 via the CPU access port 608 is stored in the input buffer 702 and input to the data selector 703 in 8-bit units.

The four input 8-bit data are output data 709 in order from the most significant byte or the least significant byte.
Is output as The output order determination register 705 determines whether to output from the most significant byte or the least significant byte.
Is determined by the value of The output order determination register 705 is
The initial setting program that operates when the digital broadcast receiving apparatus 600 is started is set such that C is 0 if the CPU type is big endian type and 1 if the CPU type is little endian type.
It is set according to the type of PU. If the type of the CPU is a big endian type, the value of the output order determination register 705 becomes 0, and the counter 707 counts in ascending order, and D (31:24), D (23:16), D
(15: 8) and D (7: 0) are sequentially output. If the CPU type is a little endian type, the value of the output order determination register 705 is 1, the counter 707 counts down in descending order, and D (7: 0), D (15:
8), D (23:16) and D (31:24) are sequentially output. As described above, the byte conversion circuit 612
Since the 4-byte data input by the input unit 09 is output to the local memory 606 one byte at a time, the decompression circuit 613 can fetch data continuously from the local memory 606 by simply changing the memory address one byte at a time.

(Predictive control operation) Hereinafter, the CPU 60
The prediction control operation of No. 9, that is, the procedure in which the CPU 609 stores a plurality of pieces of still image data which may be selected by the user in the main storage 110 will be described in detail. FIG. 3 is an image diagram showing the relationship between the still images. In a state where the first still image is displayed, the user performs a selection operation to cause the digital broadcast receiving apparatus 600 to display the second,
One of the fourth, fifth, seventh, eleventh,... Still images can be displayed. In a state where the seventh still image is displayed, the user performs a selection operation to cause the digital broadcast receiving apparatus 600 to
One of the eighth, ninth, and first still images
One can be displayed. Note that the first still image is special, and even when any still image other than the first still image is displayed, the user can select and operate the first still image on the digital broadcast receiving apparatus 600. Can be displayed. The still image-related data is repeatedly transmitted at a predetermined interval from a digital broadcast transmitting apparatus in a stream type of “data”. The digital broadcast receiving apparatus 600 operates once after activation,
Under the control of the CPU 609, the still image related data is separated and extracted from the received data by the transport decoder 603 and stored in the main memory 610 via the local memory 604.

The control of the CPU 609 is performed by the main memory 610
Is performed by a program stored in the CPU 609.
Uses the main memory 610 as a work area when executing the program. The still image related data stored in the main storage 610 is hereinafter referred to as a still image information table. FIG.
FIG. 4 is a diagram showing the contents of a still image information table. Each still image has an identification number, an identification number of a parent still image, an identification number of a child still image, and information on the size of still image data. Here, the parent refers to a still image displayed before displaying the still image, and the child refers to a still image displayed by a user performing a selection operation on the still image. And Also, in the figure, the value (N) of the identification number indicates that the image is the Nth still image. Accordingly, FIG. 2 shows that the parent of the second still image is the first still image, for example. FIG. 5 is a flowchart of a process of storing a plurality of pieces of still image data that may be selected by the user in the main storage 110. Hereinafter, processing for storing still image data in the main storage 610 according to the processing steps of the flowchart in FIG. 5 will be described. Digital broadcast receiving device 6
After the start of 00, the CPU 609 sets the variable M holding the identification number of the still image to be displayed to 1 in order to display the first still image first (step S51). Here, the identification number is a numerical value indicating the number of still image data.

The CPU 609 refers to the still image information table for the first still image data, and has an array variable N that holds the identification number of the still image that is a child of the first still image.
= {2,4,5,7,11,50} (step S
52). This has the meaning of predicting a still image that may be selected by the user. The CPU 609 stores the main memory 61
It is checked whether the first still image data is stored at 0 (step S53). If it is not stored, the transport decoder 603 is controlled to extract the first still image data from the received data, and The first still image data is extracted from the local memory 604 and stored in the main memory 610 (step S5).
4). Subsequently, the CPU 609 retrieves the first still image data from the main memory 610, and
08, and input to the byte conversion circuit 612 in the MPEG decoder 605 (step S55). In response, the MPEG decoder 605 expands the first still image data input to the byte conversion circuit 612 by the expansion circuit 613 while using the local memory 606, and
Displayed at 14. After the digital broadcast receiving device 600 displays the still image, the CPU 609 determines whether or not the user has performed a selection operation (step S56). The operation of the user can be performed at any time.
09 determines in step S56 whether such a user operation has been performed.

While the user has not performed the selection operation, the CPU 609 determines the array variable N = $ 2, 4, 5, 7,.
11, 50}, and the second, fourth, fifth,
It is determined whether all the seventh, eleventh, and fiftyth still image data are present (step S57). If there is still image data that has not been stored in the main memory 610, the transport decoder 603 is controlled to determine from the received data. One piece of still image data is extracted and stored in the local memory 604, the still image data is taken out from the local memory 604, and the
10 (step S58), and returns to the determination of step S56. Therefore, the CPU 609 sets the second, fourth, fifth, seventh, and first as far as possible before the user performs the selection operation.
The first and 50th still image data are to be stored in the main memory 610. If the user has performed the selection operation (step S56), the CPU 609 refers to the still image information table, acquires the identification number of the still image to be displayed, and sets M =
The identification number is set (step S59). Here, if the still image to be displayed next by the user's selection is the seventh still image, M = 7. Next, CPU
An array variable N 609 holds the identification number of a still image that is a child of the seventh still image, returning to the process of step S52.
= {8, 9} is obtained (step S52). Array variable N =
After obtaining {8, 9}, the CPU 609 determines whether the seventh still image data has already been stored in the main memory 610 (step S53). If the seventh still image data is not yet stored in the main memory 610, the seventh still image data is transferred to the seventh memory via the transport decoder 603 in the same manner as the above-described process of loading the first still image data into the main memory 610. The third still image data is taken into the main memory 610 (step S54).

In the case where the user's selection operation for requesting the display of the seventh still image is performed after a certain time has elapsed since the display of the first still image, In step S58, the main memory 610 already has the seventh
Since the third still image data is stored, the CPU 60
Step 9 executes step S55. That is, the CPU 609
Converts the seventh still image data into an MPEG decoder 605
To enter. Therefore, the seventh still image is displayed.
Thereafter, the processes from step S52 to step S59 are repeatedly performed as long as the digital broadcast receiving device 600 operates. In this way, the CPU 609 stores, in the main memory 610, still image data which is a child of the still image in addition to the still image data to be displayed by the user's selection operation, so that the user's Perform processing for the next selection. If the user selects again before storing all the still image data, which are children of the still image to be displayed, in the main memory 610, the CPU 60
9 further performs an operation in preparation for the next user selection.
That is, when the user has selected, instead of continuing the process of storing the still image data of the still image predicted in the previous step S52 in the main storage 610,
The process of discarding, ie, ignoring, the already predicted information and starting the process of storing the still image data of the still image newly predicted in step S52 in the main storage 610 is started. In this way, the CPU 609 performs a prediction control operation of predicting a plurality of still image data that may be selected by the user and storing the data in the main memory 610 in advance.

Note that the first still image data is stored once in the main memory 6 so that the user can select the first still image from any still image being displayed and display it immediately.
When the still image data is stored in the area used for storing the still image in the main memory 610, the other still image data is not erased thereafter. If not, it will be erased as needed. As for this erasure, as a result of the user's selection operation, those which are no longer likely to be selected in the next operation are preferentially erased. As described above, the digital broadcast receiving apparatus 600 according to the present invention performs an operation for the user's next selection, so that the size of the area in the main memory 610 that can be used for storing a still image is limited. Even when the service is provided, a still image information providing service with good response can be provided.

<Embodiment 2> Hereinafter, Embodiment 2 of the present invention in which a digital broadcast receiving apparatus according to the present invention displays a still image using the graphics display function of an MPEG decoder will be described with reference to FIGS. It will be described using FIG. Conventional M
One of the functions of the PEG decoder 105 is to output graphics display data directly stored in the local memory 106 to a TV. Hereinafter, it is referred to as a graphics display function. If the CPU 109 creates graphics to be displayed as data corresponding to pixels and stores the data in the local memory 106, the display circuit 114
The TV output is performed by the decoder 105 (see FIG. 19).
The second embodiment is a modification of the digital broadcast receiving apparatus 600 according to the first embodiment, and differs from the digital broadcast receiving apparatus 600 in the processing steps until the still image data stored in the main storage 610 is displayed. That is, in the second embodiment, the digital broadcast receiving device 6
No. 00 stores a program for decompressing the compressed still image data in the main memory 610 (see FIG. 1), and the still image data stored in the main memory 610 in the first embodiment is stored in the MPEG decoder 605. In the second embodiment, the still image data stored in the main memory 610 is different from the still image data stored in the main memory 610 in contrast to being expanded and displayed by the expansion circuit 613.
0 is decompressed by execution of the program stored in CPU 0 by the CPU 609 to obtain displayable pixel data, and then stored in the local memory 606 and stored in the MPEG decoder 605.
(See FIG. 1). The second embodiment is the same as the first embodiment in other respects, and therefore, the other description is omitted. The technique of decompressing compressed still image data by software is a conventional technique.

Third Embodiment A third embodiment of the present invention will be described below with reference to FIGS. The digital broadcast receiving apparatus according to the third embodiment uses the graphics display function of the MPEG decoder, and further uses the function of expanding and displaying video data of the MPEG decoder.
Display a still image and another image on top of each other. Conventionally MPEG
The decoder 105 has a function of displaying the pixel data stored in the local memory 106 in a graphic form and a function of expanding and displaying the compressed video and audio data stored in the local memory 106 by the expansion circuit 113 (see FIG. 1). See FIG. 19). Hereinafter, both the pixel image data generated by the CPU based on the graphic display data and the pixel image data of the still image obtained by expanding the compressed still image data by the CPU by the program are referred to as graphic data.

FIG. 6 is a block diagram showing a configuration of digital broadcast receiving apparatus 1600 according to the third embodiment. The digital broadcast receiving apparatus 1600 includes a tuner & demodulator 1602 for selecting and demodulating transmitted data, and a transport decoder 1603 for separating packets such as “video”, “audio”, and “data” from a transport stream.
, A local memory 1604 attached to the transport decoder 1603, an MPEG decoder 1605,
Local memory 16 attached to PEG decoder 1605
06 and a CPU that controls the central control of the digital broadcast receiving apparatus
1609 and a main memory 1610 accessed by the CPU 1609. Main memory 1610 is CPU 1609
Of the digital broadcast receiving apparatus 1600 by controlling the digital broadcast receiving apparatus 1600, but may store other various data. The data 1601 sent from the transmitting device is transmitted to the tuner & demodulation unit 160
2 is selected and demodulated in the transport decoder 1603
Is input to The transmitted data is obtained by time-division multiplexing a large number of coded streams called transport streams with relatively short fixed-length packets. The transport decoder 1603 separates and extracts a specific transport stream from received data using a packet identifier (PID) as a filter condition under the control of the CPU 1609. That is, the CPU 160
9 designates a filter condition for the transport decoder 1603 so that the transport decoder 1603 extracts necessary data and stores the data in the local memory 1604, and then stores the data in the main memory 1610 from the local memory 1604. Transfer the most important data.

Here, the data transmitted from the digital broadcast transmitting apparatus is based on the MPEG2 system standard, DVB-S
Assuming compliance with the I standard, etc., the CPU 1
Reference numeral 609 designates a PAT of a predefined PID by designating a filter condition to the transport decoder 1603.
To extract the PID of the PMT by referring to the PAT,
Specify this as a filter condition to extract PMT,
With reference to the PMT, the PID of the necessary stream data such as “video”, “audio”, “data”, etc. is obtained, and this is used as a filter condition to select one of “video”, “audio”, and “data”. Can be separated and extracted. Transport decoder 1603 is
If the stream type of the transport stream is “video” or “audio”, the video and audio
Input to PEG decoder 1605 and MPEG decoder 1
Reference numeral 605 expands and displays the video and audio. If the stream type is “data”, the transport decoder 1603 stores the data in the local memory 1604 attached to the transport decoder 1603. The data stored in the local memory 1604 can be accessed from the CPU 1609.

In the third embodiment, the digital broadcast transmitting apparatus transmits video and audio such as TV programs, graphics display data such as a program guide, and 150 still image data. As for still image data, 150 images are repeatedly transmitted. Here, a moving image is transmitted with a stream type of “video”, an audio is transmitted with a stream type of “audio”, and graphics display data and still image data are transmitted with a stream type of “data”. The tuner & demodulator 1602 of the digital broadcast receiver 1600 sequentially receives and demodulates repeatedly transmitted data and inputs the data to the transport decoder 1603. In response, the transport decoder 16
03 stores, in the local memory 1604, still image related data transmitted in a stream type of “data” under the control of the CPU 1609. The CPU 1609 is
The still image-related data is transferred from the local memory 1604 to the main storage 1610, and by referring to the still image-related data, the still image data required as needed by the user is controlled by the transport decoder 1603. , And stores it in the main memory 1610. Immediately after the digital broadcast receiving apparatus 1600 is started, the digital broadcast receiving apparatus 1600 selects the first still image among the plurality of transmitted still images.
Since the third still image is to be displayed, the main memory 1
610 stores still image related data, first still image data, and other necessary still image data.

Note that the CPU 1609 predicts still image data that may be selected by the user and causes the transport decoder 1603 to extract the still image data.
The prediction control operation of U1609 is the same as the prediction control operation of CPU 609 in the first embodiment. Also,
The MPEG decoder 1605 has a local memory 1606
Decompression circuit 1613 for decompressing the compressed video and audio data stored in the local memory 1606
A display circuit 1614 for superimposing and displaying the video and audio expanded by the expansion circuit 1613 and the graphics display data directly stored in the local memory 1606.
And a stream input port 1607 for receiving an input of a transport decoder for compressed video and audio data
A serial-parallel conversion circuit 1611 for converting serial data input from the stream input port 1607 into 8-bit parallel data, a CPU access port 1608 for receiving graphic data from the CPU 1609, and 32 input from the CPU access port. A byte conversion circuit 1612 for converting bit data into four 8-bit data, and a serial / parallel conversion circuit 1
An arbitration circuit 1615 for transferring video and audio data sent from the 611 and graphic data sent from the byte conversion circuit 1612 to the local memory 1606 is provided. Immediately after the digital broadcast receiving device 1600 is activated, the first still image among the plurality of transmitted still images is
In order to display the still image, the CPU 1609 executes the first
The third still image data is taken out from the main storage 1610, graphic data to be decompressed and displayed under the control of a program separately stored in the main storage 1610 is generated, and
The data is input to the arbitration circuit 1615 via the U access port 1608 and the byte conversion circuit 1612.

The video and audio data transmitted from the digital broadcast transmitting apparatus are extracted by the transport decoder 1603 under the control of the CPU 1609, and transmitted via the stream input port 1607 and the serial / parallel conversion circuit 1611. Then, it is input to the arbitration circuit 1615. The arbitration circuit 1615 stores the graphic data and the compressed video and audio data sent from different paths in the local memory 1606. The video and audio data stored in the local memory 1606 is expanded by the expansion circuit 1613 and stored in the local memory 1606 again. The display circuit 1614 includes:
A decompressed image stored in the local memory 1606,
The graphic data of the still image separately stored in the local memory 1606 is superimposed and displayed. Thereafter, even when the display of the seventh still image is required by the operation of the user, the digital broadcast receiving apparatus 1600 can display the video as in the case of the display of the first still image described above. , And superimpose the graphic data of the still image. As described above, the digital broadcast receiving apparatus according to the present invention can also display a video and a still image in a superimposed manner.

<Embodiment 4> Hereinafter, Embodiment 4 of the digital broadcast receiving apparatus according to the present invention will be described. In the third embodiment, a still image is displayed using the graphics display function of the MPEG decoder. This MPEG
The graphics display function of the decoder is also used to display graphics display data such as a program guide transmitted from the digital broadcast transmitting apparatus. The data for graphics display is data having a graphic type, display coordinates, size, and the like as elements for displaying characters, lines, and other graphics. The CPU 1609 stores the graphics display data via the transport decoder 1603 and the local memory 1604 in the main storage 161.
0, and generates graphic data as a pixel image based on the data for graphics display. In the fourth embodiment, the digital broadcast receiving apparatus according to the present invention receives graphics display data of a program guide, video and audio data, and displays graphics and video in a superimposed manner. An example will be described.
The other points are the same as the third embodiment.
In particular, the arbitration circuit 1 not described in detail in the third embodiment.
615 will be described in detail in comparison with a normally conceivable arbitration circuit. The video and audio expanded by the expansion circuit 1613 and the graphics generated by the CPU 1609 are overlapped by the display circuit 1614 and
It is output as a signal for V output (see FIG. 6).

FIG. 7 is a diagram showing a display surface on which video and graphics are displayed overlapping each other. Display surface 1001
Of the TV program is displayed on the background of the graphic 1002 of the program guide.
03 is displayed. Although not shown in the figure,
While this display surface is being displayed, sound is also being reproduced. In this way, in order to superimpose and display the video and the graphics and reproduce the audio, the video and audio data and the graphic data are once stored in the local memory 160.
6 must be stored. Note that the video and audio data and the graphic data pass through different paths and are stored in the local memory 1606. The arbitration circuit 1615 arbitrates the data from the two paths and controls the data transfer to store the arbitrated data in the local memory 1606 via one bus.

(Normal Arbitration Circuit) Here, an ordinary arbitration circuit will be described with reference to FIGS. FIG. 8 is a functional block diagram of the arbitration circuit 1700 that can be usually considered. Video and audio data are intermittently sent to the arbitration circuit 1700 at a predetermined transfer rate. Graphics data is intermittently sent to the arbitration circuit 1700. In the following description, video and audio are represented by A, and video and audio data are transferred to the local memory attached to the MPEG decoder by A.
The transfer of graphics is called B, and the transfer of graphic data to a local memory attached to an MPEG decoder is called B transfer. The arbitration circuit 1700 includes a transfer counter 1 for counting the number of transfer clocks during the transfer of A or B.
710 and A transfer control unit 1 that controls execution of A transfer
702 and B transfer control unit 1 that controls execution of transfer of B
706, a transfer right check unit 1701 of A for instructing the transfer control unit 1702 of A if transfer is possible if transfer is possible, and B if it is possible to transfer and check whether transfer of B is possible A transfer right check unit 1705 that instructs the transfer control unit 1706 to transfer the transfer right, a transfer right holding unit 1704 that holds the transfer right of A, a transfer right holding unit 1708 that holds the transfer right of B, and , The transfer right setting unit 1 which sets a value indicating that the transfer right exists in one of the transfer right holding unit 1704 of A and the transfer right holding unit 1708 of B, and sets a value indicating that the transfer right does not exist in the other.
709, A transfer request holding unit 1703 holding the transfer right request from A's transfer right check unit 1701,
A transfer request holding unit 1707 for holding the transfer right request from the transfer right check unit 1705 for B.

The transfer counter 1710 is set to a value obtained by subtracting 1 from the number of clocks in one processing unit when the transfer is started by the transfer control unit 1702 of A or the transfer control unit 1706 of B, and decremented by 1 every clock. Is done. Assuming that one processing unit of the transfer of A and the transfer of B is two clocks, the transfer counter is set to 1 when the transfer is started. Here, since the video and audio data must be transferred at a certain transfer rate, the transfer of A must not be performed after the transfer of B is completed. For this reason, the transfer of A and the transfer of B are each divided into a certain processing unit and processed for each processing unit, and when a transfer request occurs at the same time, the transfer is performed alternately for each transfer of a certain processing unit. . FIG. 9 is a flowchart showing a processing flow of the transfer right setting unit 1709 in the normal arbitration circuit 1700. This flow loops once per clock.
A-REQ in the flow is a signal indicating that a transfer request of A is issued, B-REQ is a signal indicating that a transfer request of B is issued, and A-ACK is B-ACK is a signal indicating that B has the right to transfer. The transfer counter 1710 is 0,
When the transfer request of A is issued to the transfer request holding unit 1703 of A, a value indicating that the transfer right is held is set in the transfer right holding unit 1704 of A (steps S1801 and S18).
02, S1805). The transfer counter 1710 is 0, the transfer request of A is not issued to the transfer request holding unit 1703 of A, and the transfer request holding unit 1707 of B
If the transfer request is issued, the transfer right holding unit 1 of B
708 is set with a value indicating that there is a transfer right (step S
1801, S1802, S1803, S1806). In cases other than the above two cases, the transfer right holding unit 1 of A
The values of the transfer right holders 1704 and 1704 are kept (steps S1801, S1804, S1807, S180
8).

FIG. 10 shows a typical arbitration circuit 170
7 is a flowchart showing a processing flow of a transfer right check unit 1701 of A at 0. This flow also loops once per clock. If there is data to be transferred and there is no value indicating that the transfer right exists in the transfer right holding unit 1704 of A, a value indicating that there is a transfer request is set in the transfer request holding unit 1703 of A (step S1901). , S1
902, S1903). Also, there is data to be transferred, a value indicating that the transfer right exists in the transfer right holding unit 1704 of A, the transfer counter 1710 is 0, and the transfer request holding unit 1707 of B If there is no value to the effect that there is, a value obtained by subtracting 1 from the number of clocks 2 per processing unit, that is, 1 is set in the transfer counter 1710, and A
To start the transfer of A by controlling the transfer control unit 1702 (steps S1901, S1902, S1904, S1).
905, S1906, S1907). Note that the processing flow of the transfer right check unit 1705 of B is the same as that in FIG. The processing timing of the transfer of A and the transfer of B in the ordinary arbitration circuit 1700 having the above-described configuration and processing flow will be described below.

FIG. 11 shows a typical arbitration circuit 170
FIG. 11 is a timing chart of processing 0. Regardless of whether the transfer of A is performed faster or slower, the request for the transfer of A occurs intermittently. If the transfer of A is performed late, that is, if the transfer from the transfer request to the transfer completion is long after being waited for by the arbitration circuit, the data of A may be discarded. Even if the video data is discarded to some extent, the displayed image is only slightly degraded. On the other hand, the graphic data is not sent from the outside, but is generated by the CPU 1609.
1609 can make a request for the transfer of the next B.
Therefore, if the transfer of B is performed quickly, the request for the transfer of the next B occurs quickly, and if the transfer of B is performed slowly, the request for the transfer of the next B occurs late. Further, the data of B is not discarded. At t1, B1 occurs, and B has already obtained the transfer right (B-ACK). Therefore, the transfer process of B1 is performed at two clocks of t2 and t3. A1 at t3
Occurs and A does not have the transfer right (A-ACK).
At t4, a transfer request (A-REQ) is issued. At t4, the counter is 0, so in response to the transfer request of A (A-REQ),
At t5, A is given a transfer right (A-ACK). At t5, A obtains the transfer right (A-ACK), so the transfer process of A1 is performed at two clocks of t6 and t7. At t8, five clocks after the transfer completion (t3) of B1, B2 occurs at B8, and since B has not obtained the transfer right (B-ACK), it issues a transfer request (B-REQ) at t9.

At t9, since the counter is 0, the transfer right (B-AC) is transferred to B at t10 in response to the transfer request (B-REQ) of B.
K) give. At t10, B has obtained the transfer right (B-ACK), so the transfer process of B2 is performed at two clocks t11 and t12. Similarly, A2 generated at t9 is transferred by two clocks t14 and t15.
A3 generated at t15 is transferred by two clocks t16 and t17. B3 occurs at t16 four clocks after the completion of transfer of B2 (t12), but the transfer process of B3 is not performed until t17. As described above, in the ordinary arbitration circuit 1700, after the transfer of A is performed, A is in a state where the transfer right exists.
At this time, if the transfer of B needs to be performed, the transfer right is acquired at least one clock after issuing the transfer request of B, and B can be transferred at last. That is, in the arbitration circuit normally considered, when the transfer of one processing unit of either A or B is completed, the transferring side of A and B retains the right to transfer next, and the current transfer right The side that does not hold the transfer request issues a transfer request and receives permission at least one clock after, so that the transfer is possible.

However, in the arbitration circuit which can be considered normally, since the transfer of A and the transfer of B are processed equally, FIG.
In the case where the display surface 1001 shown in FIG.
When 2 is important, that is, when it is necessary to process the transfer request of B with priority over the transfer request of A, there is a problem that the ordinary arbitration circuit is not sufficient. In other words, the video and audio change over time, and even if some data is lost, the data immediately before can be displayed. When it arrives from the device side, it is possible to discard previous data and issue a transfer request of A for the next data, but missing of graphics data is not allowed.

(Arbitration Circuit in Digital Broadcast Receiving Apparatus According to the Present Invention) The arbitration circuit in the digital broadcasting receiving apparatus according to the present invention is an improvement on the above-mentioned arbitration circuit which is usually considered, and gives priority to a transfer request on the side of higher importance. It is possible to perform the processing in an efficient manner. The arbitration circuit in the digital broadcast receiving apparatus according to the fourth embodiment will be described below with reference to FIGS. The arbitration circuit 1615
The local memory 1 receives video and audio data input from the serial / parallel conversion circuit 1611 and graphics data input by the CPU 1609, and arbitrates these data.
606 is realized. It should be noted that both of the above two systems of data are stored in the local memory 160.
6 is input to the arbitration circuit 1615 together with the storage destination address. The video and audio data that needs to be expanded need to be stored in a first area in the local memory 1606, and this first area is stored in the expansion circuit 1613.
Will be accessed from Also, graphics data to be displayed directly by the display circuit 1614 needs to be stored in a second area in the local memory 1606, and this second area is accessed by the display circuit 1614. Will be done. Therefore, the arbitration circuit 1615 refers to the input storage destination address to determine which of the two types of data is the input data, arbitrates them, and transfers the data.

FIG. 12 shows an arbitration circuit 1615 according to the present invention.
3 is a functional block diagram of FIG. Video and audio data are intermittently sent to the arbitration circuit 1615 at a predetermined transfer rate. Graphics data is intermittently sent to the arbitration circuit 1615. In the following description, transfer of video and audio to A, transfer of video and audio data to the local memory 1606 is referred to as A transfer, transfer of graphics to the local memory 1606, and transfer of graphic data to the local memory 1606 are referred to as B transfer. Arbitration circuit 1
Reference numeral 615 denotes a transfer counter 2710 for counting the number of transfer clocks during the transfer of A or B, a transfer control unit 2702 of A for controlling execution of transfer of A, and a transfer control unit of B for controlling execution of transfer of B. 2706, a transfer right check unit 2701 of A that instructs the transfer control unit 2702 of A if transfer is possible if transfer is possible, and B if it is possible to transfer by checking whether transfer is possible. Transfer right check unit 2 instructing transfer control unit 2706 to transfer
705, a transfer right holding unit 2704 of A holding the transfer right of A, a transfer right holding unit 2708 of B holding the transfer right of B, a transfer right holding unit 2704 of A, and a transfer right holding unit 2708 of B A transfer right setting unit 2709 that sets a value indicating that the transfer right exists in one of them and a value indicating that the transfer right does not exist in the other, and a transfer right request from the transfer right check unit 2701 of A. The transfer request holding unit 2703 of A and the transfer right check unit 270 of B
5 includes a transfer request holding unit 2707 for holding the transfer right request from No. 5 and a priority holding unit 2711 for holding a value indicating which of A and B is to be processed preferentially.

The transfer counter 2710 is set to a value obtained by subtracting 1 from the number of clocks in one processing unit when transfer is started by the transfer control unit 2702 of A or the transfer control unit 2706 of B. Is subtracted. If one processing unit of the transfer of A and the transfer of B is two clocks,
The transfer counter is set to 1 when the transfer begins. Here, since the video and audio data must be transferred at a certain transfer rate, the transfer of A must not be performed after the transfer of B is completed. For this reason, the transfer of A and the transfer of B are each divided into a certain processing unit and processed for each processing unit, and when a transfer request occurs at the same time, the transfer is performed alternately for each transfer of a certain processing unit. . FIG. 13 is a flowchart showing a processing flow of the transfer right setting unit 2709 in the arbitration circuit 1615. This flow loops once per clock.

A-REQ in the flow is a signal indicating that a transfer request of A is issued, B-REQ is a signal indicating that a transfer request of B is issued, and A-ACK is a signal indicating that a transfer request of B is issued. A is a signal indicating that A has the transfer right, and B-ACK is a signal indicating that B has the transfer right. Transfer counter 2710
Is not 0, the transfer right holding unit 2704 of A and B
Of the transfer right holding unit 2708 (step S28).
01, S2802, S2803, S2804). The transfer counter 2710 is 0 and the priority holding unit 2711
Indicates that A has a priority, and if the transfer request of A is issued to the transfer request holding unit 2703 of A, a value indicating that the transfer right holding unit 2704 of A has the transfer right (Steps S2801, S2805, S2)
806, S2808). The transfer counter 2710 is 0, the value of the priority holding unit 2711 indicates that A has the priority, the transfer request holding unit 2703 of A has not issued the transfer request of A, and If a transfer request for B has been issued to the transfer request holding unit 2707 for B, a value indicating that there is a transfer right is set in the transfer right holding unit 2708 for B (steps S2801, S2805, S2806, S
2807, S2809).

When the transfer counter 2710 is 0, the value of the priority holding unit 2711 indicates that A has priority, and the transfer request of A is issued to the transfer request holding unit 2703 of A. And B transfer request holding unit 2707
If the transfer request of B has not been issued, a value indicating that there is a transfer right is set in the transfer right holding unit 2704 of A (steps S2801, S2805, S2806, S280).
7, S2808). The transfer counter 2710 is 0,
When the value of the priority holding unit 2711 indicates that A has no priority, and the transfer request of B is issued to the transfer request holding unit 2707 of B, the transfer right holding unit 27 of B
08 is set with a value indicating that there is a transfer right (step S2).
801, S2805, S2810, S2812). The transfer counter 2710 is 0, and the priority holding unit 271
The value of 1 indicates that A has no priority, the transfer request of B is not issued to the transfer request holding unit 2707 of B, and the transfer request of A is sent to the transfer request holding unit 2703 of A. If it has been issued, a value indicating that there is a transfer right is set in the transfer right holding unit 2704 of A (steps S2801 and S2801).
2805, S2810, S2811, S2813). When the transfer counter 2710 is 0 and the priority holding unit 27
A value of 11 indicates that A has no priority, and B
When the transfer request of B is not issued to the transfer request holding unit 2707 of A and the transfer request of A is not issued to the transfer request holding unit 2703 of A, the transfer right holding unit 2708 of B has the transfer right. Is set (step S280).
1, S2805, S2810, S2811, S281
2).

FIG. 14 is a flowchart showing a processing flow of the transfer right check unit 2701 of A in the arbitration circuit 1615. This flow also loops once per clock. If there is data to be transferred and there is no value indicating that the transfer right exists in the transfer right holding unit 2704 of A, a value indicating that there is a transfer request is set in the transfer request holding unit 2703 of A (step S2901). , S2902, S2
903). There is a value indicating that there is data to be transferred and the transfer right exists in the transfer right holding unit 2704 of A,
If the priority holding unit 2711 indicates that A has no priority, the transfer request holding unit 2703 of A is set with a value indicating that there is a transfer request (steps S2901, S2901).
2902, S2904, S2905). There is a value indicating that there is data to be transferred and the transfer right exists in the transfer right holding unit 2704 of A, and the priority holding unit 2711
Indicates that A has a priority, the transfer counter 2710 is 0, and the transfer request holding unit 27 of B
If there is no value indicating that there is a transfer request in 07, the transfer counter 2710 is set to a value obtained by subtracting 1 from the number of clocks 2 in one processing unit, that is, 1 and the transfer control unit 2702 of A is controlled to transfer A. (Steps S2901, S29)
02, S2904, S2906, S2907, S290
8, S2909).

The processing flow of the transfer right check unit 2705 for B is the same as that in FIG. 14 except that A is replaced with B and B is replaced with A, and a description thereof will be omitted. The processing timing of the transfer of A and the transfer of B in the arbitration circuit 1615 having the above configuration and processing flow will be described below. FIG. 15 is a processing timing chart of the arbitration circuit 1615. Here, the case where B has the priority is shown. Regardless of whether the transfer of A is performed faster or slower, the request for the transfer of A occurs intermittently. If the transfer of A is performed late, that is, if the transfer from the transfer request to the transfer completion is long after being waited for by the arbitration circuit, the data of A may be discarded. Even if the video data is discarded to some extent, the displayed image is only slightly degraded. On the other hand, since the graphic data is generated by the CPU, if the transfer of B is performed quickly, a request for the transfer of the next B occurs quickly, and if the transfer of B is performed slowly, the request of the next B is performed. The transfer request occurs late. Further, the data of B is not discarded.

At time t1, B1 occurs, and B has already obtained the transfer right (B-ACK). Therefore, transfer processing of B1 is performed at two clocks t2 and t3. A1 occurs at t3, and A does not have the transfer right (A-ACK).
Issues a transfer request (A-REQ). At t4, the counter is 0, so that in response to the transfer request (A-REQ) of A, t5
Gives transfer right (A-ACK) to A. At t5, A obtains the transfer right (A-ACK), so the transfer process of A1 is performed at two clocks of t6 and t7. At t7, the counter is 0, and both A and B have transfer requests (A-REQ, BR
Since EQ) has not been issued, at t8, B having the priority gets the transfer right (B-ACK). At t8, 5 clocks after the transfer completion of B1 (t3), B2 occurs, and B has the transfer right (B-ACK).
The transfer process of B2 is performed by two clocks of 10. Similarly, A2 generated at t9 is transferred by two clocks t12 and t13, and transfer of B2 is completed (t10).
B3 generated at t14, which is four clocks after, is t15,
The transfer process is performed at two clocks of t16.

Therefore, B1, B by the arbitration circuit 1615
2, the transfer process of B3 is completed by t16, and the transfer process of B1, B2, B3 by the normal arbitration circuit 1700 is not completed by t17. As described above, in the arbitration circuit 1615, even after the transfer of A, the transfer right is transferred to B, which has priority. Since the transfer is possible, the time from the transfer request of B to the transfer right given to B can be reduced as compared with the ordinary arbitration circuit 1700. The arbitration circuit 161
According to No. 5, transfer of graphic data of a still image and compressed data of video such as a moving image to the local memory 1606 is
Still images can be prioritized, and even when a moving image is displayed over a background of a still image, the still image can be displayed with priority. That is, even in the case where the still image and the video are superimposed and displayed as described in Embodiment 3, the still image can be displayed at high speed.

<Fifth Embodiment> A digital broadcast receiving apparatus according to a fifth embodiment of the present invention will be described below. FIG. 16 shows a digital broadcast receiving apparatus 36 according to the fifth embodiment.
FIG. 2 is a block diagram showing a configuration of a 00. Digital broadcast receiving apparatus 3600 according to Embodiment 5 is a modification of digital broadcast receiving apparatus 1600 according to Embodiments 3 and 4, and includes a tuner & demodulator 1602 for selecting and demodulating transmitted data, and a transformer. A transport decoder 3603 for separating packets such as "video", "audio", and "data" from the port stream;
605, a local memory 1606 attached to the MPEG decoder 1605, a CPU 1609 which controls the central control of the digital broadcast receiving apparatus, and a main memory 3610 accessed by the CPU 1609. In the figure, the same parts are denoted by the same reference numerals in digital broadcast receiving apparatus 3600 and digital broadcast receiving apparatus 1600 (FIG. 6).
reference). The digital broadcast receiving apparatus 3600 is significantly different from the digital broadcast receiving apparatuses 1600 according to the third and fourth embodiments in that the local memory 604 is not provided. The main memory 3610 stores a program to be executed by the CPU 1609, and the transport decoder 3603 controls the tuner & under the control of the CPU 1609.
It has a function of extracting necessary data from data input from the demodulation unit 1602 and storing the data in the main storage 3610.

Hereinafter, the digital broadcast receiving apparatus 3600 according to the fifth embodiment stores the received still image data in the main storage 3.
The procedure up to the storage in 610 will be described. Immediately after the digital broadcast receiving apparatus 3600 is activated, the CPU 1609
Notifies the transport decoder 3603 of the address of a certain area in the main memory 3610. Thereafter, digital broadcast receiving apparatus 3600 transmits data repeatedly transmitted from the digital broadcast transmitting apparatus to tuner & demodulator 1602.
, And demodulate and sequentially input to the transport decoder 3603. The transport decoder 3603 uses the CP
Under the control of U1609, required still image data is extracted from the input data by identifying it by PID, and the still image data To transfer. Note that the transport decoder 3603
The function of extracting specific data designated by the CPU 1609 from input data is the same as that of the transport decoder 1603 in the third and fourth embodiments. Thus, the digital broadcast receiving device 3
Reference numeral 600 stores the received still image data in the main storage 3610. The procedure for storing the still image related data in the main storage 3610 is the same as the procedure for the still image data described above.

As described above, the digital broadcast receiving apparatus according to the present invention has been described based on the embodiments, but it is needless to say that the present invention is not limited to these embodiments. That is, (1) In the embodiment, 150 still image data and one still image related data are repeatedly transmitted from the digital broadcast transmitting apparatus side. However, the present invention is not limited to this. One piece of still image data and one piece of still image related data may be paired and repeatedly transmitted in 150 sets. In this case, the still image related data is information indicating only the still image data directly linked from one still image data paired with the still image data. Here, the link is information for specifying still image data to be displayed next in order to realize a display transition based on a user operation between a still image and a still image, and is currently displayed. Refers to information related to still images. For example, the still image related data paired with the seventh still image data is that the still image that can be selected by the user when the seventh still image is displayed is the eighth or ninth still image. If so, the numbers 8 and 9 for identifying these still image data are included as information indicating the link destination. As described above, even in a form in which still image data and still image related data indicating identification information of still image data to be a link destination from the still image data are paired, the digital broadcast receiving device is
With reference to the still image related data, the present invention is not limited to performing the prediction control operation generally in accordance with the flowchart shown in FIG. However, when still image data is taken into the main storage, the still image related data paired with the still image data is also taken into the main storage. Note that even when such still image data and still image related data are paired, the digital broadcast receiving apparatus fetches all the still image related data into the main memory in advance and presents it in the embodiment. As such a still image information table (see FIG. 4), the prediction control operation may be performed with reference to this still image information table.

(2) In the embodiment, the still image-related data indicates information such as which still image is a child of a certain still image. It may also include information indicating the order in which the user is more likely to be selected. For example, the still image information table shown in FIG. 4 indicates that the still image numbers that are children of the still image with the identification number 1 are 2, 4, 5, 7, 11, and 50. Still image related data may be created in advance on the digital broadcast transmitting device side so that the order of the numbers is the order in which the user is more likely to be selected. In this case, the CPU 609 shown in FIG.
The prediction control operation performed in step S58 is to store the still image data in the main memory in consideration of the possibility of being selected by the user in step S58, and the storage area of the predicted still image in the main memory is If an overflow occurs, the data may not be stored thereafter. Alternatively, only the items that are likely to be selected by the user may be stored in the main memory in advance. As a result, even when the area in which the still image can be stored in the main memory is very small, the probability that the still image can be displayed in response to the user's selection operation is improved.

(3) In the first and second embodiments, the still image data transmitted from the digital broadcast transmitting apparatus is 150
However, the number is not limited to this, and may be 200, 300, or any number.

(4) In the first and second embodiments, the digital broadcast transmitting apparatus repeatedly transmits 150 still image data, but it is not always necessary to repeatedly transmit the completely identical still image. The still image may be changing. For example, the still image of the “weather forecast” may be a still image changed to the latest information every three hours. In this case, a processing program for replacing the still image data stored in the main storage 610 with new transmitted still image data at regular time intervals is stored in the main storage 610, and the CPU 6
09 to execute the program.

(5) In the first and second embodiments, the digital broadcast receiving apparatus 600 temporarily stores still image data retrieved from the local memory 604 in the main memory 610. Memory 60
6 may be stored.

(6) In the first embodiment, the output order determination register 705 inside the byte conversion circuit 612 is set to 0 if the CPU type is a big endian type,
Is set according to the type of CPU by an initial setting program that operates when the digital broadcast receiving apparatus 600 is started, so that the output order determination register 705 is set in advance so that the type becomes 1. It may be fixed to 0 or 1. However, in this case,
CPU 60 suitable for the value of output order determination register 705
9 is a component of the digital broadcast receiving apparatus.

(7) In the first embodiment, the input data of the byte conversion circuit 612 is 32 bits in parallel,
09 handles 4 bytes as 1 word,
The input data of the byte conversion circuit 612 is not limited to 32 bits, and if n is an integer of 2 or more, n of 8
The number of bytes may be 1
It may be treated as a word. This byte conversion circuit 6
If the 12 input data correspond to the word length of the CPU 609, the CPU 609 can transfer data such as a still image from the main memory 610 to the local memory 606 at high speed. For example, if the input data of the byte conversion circuit 612 is 32 bits in parallel and the word length of the CPU 609 is 4 bytes as in Embodiment 1, the performance of the CPU 609 can be maximized. Further, the byte conversion circuit 612 is provided in the local memory 6.
The data may be directly transferred to the decompression circuit 613 instead of transferring the data to 06.

(8) In the main memory storing means of the first embodiment, the CPU 609 stores a plurality of still image data which may be selected by the user in the main memory 610 and displays the still image data by selecting the user. In addition to the still image data to be performed, still image data that is a child of the still image is also stored in the main memory 610, so that the process for preparing for the next user selection is used. The process is not limited to preparing for the next user selection, but may be the process for preparing for the next user selection or the process for preparing for the next user selection. The processing may be provided. For example, in order to prepare for the next user's selection next time, step S52 is performed.
To the array variable N with reference to the still image information table so as to obtain all of the identification number of the still image that is a child of the Mth still image and the identification number of the still image that is a child of the Mth still image. I just need. However, if many still images are stored in the main memory in advance, the capacity of the area of the main memory 610 that can be used for storing still images must be increased.

(9) CPU 609 described in the first embodiment
In the prediction control operation (see FIG. 5), every time one still image data is fetched into the main memory in step S58, it is determined in step S56 whether or not the user has performed a selection operation. The processing order of the determination and the like is not limited to this.For example, even if the user performs some selection operation even during execution of the process of sequentially taking in the necessary still image data into the main memory based on the prediction, the The process of sequentially taking still image data into the main memory may be interrupted, and the process may proceed to the process of step S59.

(10) Arbitration circuit 1 described in the fourth embodiment
615 is a CPU 1609 as described in the third embodiment.
If the still image data expanded by software is input by specifying the second area in the local memory 1606, it is stored in the local memory 1606. As a result, the still image data is displayed by the display circuit 1614. Will be displayed. In another embodiment, the CPU 160
9 may address and input the first area in the local memory 1606 without expanding the still image data by software. In this case, the arbitration circuit 1
615 stores the still image data in the local memory 1606
As a result, the still image data is expanded by the expansion circuit 1613 and then displayed by the display circuit 1614. However, the CPU 1609 inputs still image data to the arbitration circuit 1615 via the byte conversion circuit 1612 only when video and audio data are not input to the arbitration circuit 1615.

(11) In the fourth embodiment, the transfer of A and the transfer of B
Although the execution time of one processing unit of the transfer is defined as two clocks, the execution time of one processing unit is not limited to two clocks, but may be any number of clocks. Further, the execution time of one processing unit of the transfer of A and the transfer of B may be different from each other.

(12) In the fourth embodiment, the transfer counter 2710 detects the end of transfer execution in one processing unit. However, the transfer counter is not used, and transfer in one processing unit is not being executed or being executed. Any circuit may be used as long as it indicates this, and for example, a circuit that holds 1 during the transfer of one processing unit and holds 0 when the transfer of one processing unit is not being executed may be used.

(13) In the fourth embodiment, the case where the transfer of B has priority has been described. However, the value of the priority holding unit 2711 of the arbitration circuit 1615 can be changed at any time.

[0061]

As is apparent from the above description, the digital broadcast receiving apparatus according to the present invention receives a plurality of still picture data repeatedly transmitted from the digital broadcast transmitting apparatus, and receives the still picture data designated by the user. A digital broadcast receiving apparatus for displaying a plurality of still images, a receiving unit for sequentially receiving a plurality of the still image data, and one or more still images which will be specified by a user. Prediction means for predicting prior to designation, and still image capturing means for capturing still image data of a still image predicted by the prediction means among the plurality of still image data received by the receiving means into the storage means A designation accepting unit for accepting a designation of a still image by a user; and a designation accepting unit among one or a plurality of still image data stored in the storage unit. Based on one still image data for a still picture according to the specification of vignetting the user, characterized in that it comprises a display means for displaying the still picture. Thus, the digital broadcast receiving apparatus according to the present invention, when a plurality of still image data is transmitted from the digital broadcast transmitting apparatus, receives the plurality of still image data, and receives the plurality of still image data Among them, one or more items that will be selected by the user are predicted and stored in the storage unit prior to the user's selecting operation, so that the user gives a display instruction of a still image by the selecting operation. In such a case, the probability of quickly displaying the still image is increased.

[0062] The receiving means may further include a link indicating which still image can be designated next by the user when the still image is displayed for each of the plurality of still images. Receiving the information and storing it in the storage means, wherein the prediction means will be designated by the user by referring to the connection information stored in the storage means by the reception means 1 Alternatively, a plurality of still images can be predicted. With this, the digital broadcast receiving apparatus according to the present invention provides information indicating which still image can be selected next by the user while a certain still image is displayed, that is, a still image Since the connection information indicating the connection relationship is received, the still image data to be stored in the storage unit is predicted by referring to the connection information. The storage area capacity of the storage means for storing still image data can be reduced.

Further, the prediction means refers to the connection information stored in the storage means, so that the user can specify the still image in association with the still image displayed by the display means. One or more still images that will be specified to the user by at least one subsequent specifying operation may be predicted. Thereby, the digital broadcast receiving apparatus according to the present invention recognizes the still image specified by the user, refers to the connection information, and selects the still image that the user will select in the next operation,
It is possible to predict a still image or the like that will be selected by the next and subsequent operations. Therefore, by storing the still image data in the storage means in advance based on this prediction, the probability of quickly displaying the still image selected by the user is increased. Also, the ability to predict the still image that the user will select in the next operation makes it possible to limit the prefetched still image data to the necessary minimum number for rapid display of the still image. In addition, the storage area capacity of the storage means for storing still image data can be kept small.

Further, the designation accepting means accepts a user's designation of a still image even while the still image taking means is taking still image data into the storage means, and the prediction means comprises: When a still image related to the designation is displayed by the display unit as a result of receiving the designation by the designation receiving unit, the prediction result performed so far is discarded, the prediction is newly started, and the still image is displayed. When the designation is accepted by the designation accepting unit, if the still image data for one still image according to the designation is not stored in the storage unit yet, Is stored in the storage unit, and when the prediction result is discarded by the prediction unit and a new prediction is started, the still image of the still image newly predicted by the prediction unit is read. The image data may also be to incorporate in the storage means. With this, the digital broadcast receiving apparatus according to the present invention performs a new prediction in response to the user's specification, so that the still image data to be stored in the storage means in advance according to the current state is specified. Even when the storage area capacity of the storage unit for storing the still image data is small, the probability that the still image is promptly displayed when the user instructs the display of a certain still image by the selection operation is increased.

The still image data is digitally compressed and transmitted from the digital broadcast transmitting apparatus, and the display means includes a display data storage, which is a memory for storing data to be displayed. Unit, a decompression unit that decompresses the digitally compressed data, and an image display unit that displays an image based on the data stored in the display data storage unit, wherein the display unit uses the decompression unit. By expanding the still image data specified by the user and storing the data in the display data storage unit, the still image can be displayed using the image display unit.
Thereby, the digital broadcast receiving apparatus according to the present invention, when the still image data is digitally compressed and transmitted from the digital broadcast transmitting apparatus side, the still image data predicted by the prediction means in the display instruction from the user Since it can be stored in a compressed state when it is stored in the storage means in advance,
The storage area capacity of the storage means can be kept small.

The decompression unit decompresses the still image data specified by the user by executing a computer program, and the still image data is transmitted together with the video data from the digital broadcast transmitting apparatus. Yes,
The digital broadcast receiving apparatus further includes a video receiving unit that receives the video data, and the display unit further includes:
A first transfer of the still image data according to the user's designation expanded by the expansion unit to the display data storage unit;
A transfer control unit that performs a second transfer of the video data received by the video reception unit to the display data storage unit while arbitrating the data, wherein the transfer control unit performs the first transfer or the second transfer; A transfer necessity detecting unit for detecting that the necessity of the transfer has occurred and not having the necessity, and exclusively transferring the transfer of the first transfer or the second transfer Grant rights,
When the transfer necessity detecting unit detects that the necessity of the transfer has occurred, the transfer right is given to the transfer in which the necessity of the transfer occurs, and the first transfer and the second transfer are performed. If the necessity arises with both, while the necessity arises, the transfer right is given to the one in which the necessity arises first, and the first transfer and the second transfer If the necessity does not arise in any of the above, the transfer right granting unit that grants the transfer right to the first transfer, and the transfer necessity detecting unit of the first transfer or the second transfer When the transfer right is given by the transfer right granting unit to the transfer for which it is detected that the necessity of the transfer has occurred, a transfer executing unit that executes the transfer may be included. Thereby, the digital broadcast receiving apparatus according to the present invention has MP
The compressed still image data can be expanded and a still image can be displayed without using the expansion circuit in the EG decoder. In the meantime, the MPEG decoder can decompress the compressed data of another video or audio,
The video can be displayed so as to overlap the still image. Further, the digital broadcast receiving apparatus according to the present invention can arbitrate the data transfer between the received still image data and the video data to one display data storage memory, and can transfer the video data and the still image data. In both cases, the transfer right is granted to the transfer of still image data when transfer is not necessary, so if the transfer of still image data is required next time, transfer can be started without requiring the time to request the transfer right Therefore, even if the video is slightly degraded, it is suitable for use in which it is desired to quickly display a still image.

Further, the image display unit includes a transfer unit for transferring the still image data specified by the user from the storage unit to the decompression unit, and the transfer unit is configured to receive the input n
An input buffer for temporarily storing 8 (n is an integer of 2 or more) 8-bit data, and n bytes as one word.
A CPU that stores the data in the input buffer byte by byte, a counter that counts from 0 to (n−1) or from (n−1) to 0, and a value indicating whether the counter should be advanced in ascending or descending order. An output order storage unit that stores the data, a data selection unit that selects any one of the n pieces of 8-bit data stored in the input buffer according to the value of the counter, And a data output unit for transferring the selected 8-bit data to the decompression unit.
Thereby, the digital broadcast receiving apparatus according to the present invention has M
Even when the expansion circuit inside the PEG decoder can process only 8-bit parallel data, the CPU can read out still image data from the main storage in word units and input the still image data to the MPEG decoder. Therefore, the still image data can be transferred at a higher speed than when the CPU transfers the still image data from the main storage to the MPEG decoder in byte units.

Further, the connection information is repeatedly transmitted from the transmission device, and the receiving means receives the connection information transmitted from the transmission device and stores it once in the storage means. It can also be. As a result, the digital broadcast receiving apparatus according to the present invention only needs to once store the connection information indicating the connection relationship between the still images in the storage unit, and refers to the connection information to store the still information that will be specified by the user. Since image prediction can be performed, it is not necessary to sequentially store the connection information in the storage unit.

The connection information is paired with each of the still image data, and is specified next by a user when a still image is displayed by the display means based on the still image data. A plurality of link information indicating which still image is possible, the plurality of link information is repeatedly transmitted from the transmitting device, and the receiving unit includes a plurality of link information transmitted from the transmitting device. Receiving the link information and sequentially storing the link information in the storage unit, wherein the prediction unit is displayed by the display unit among the plurality of link information stored in the storage unit by the reception unit. By referring to one piece of link information that is paired with the still image data of the still image that is present, it is possible to perform one designation operation subsequent to the designation of the still image by the user. Ri one or more still images will be designated by the user may be to predict. Thereby, since the link information is a set of link information,
The digital broadcast receiving apparatus according to the present invention can predict a still image to be specified next by a user when a certain still image is displayed by using at least one piece of link information. Even if the storage area capacity of the means is small, it can be predicted.

A digital broadcast receiving apparatus according to the present invention receives a plurality of digitally compressed still image data repeatedly transmitted from a digital broadcast transmitting apparatus, and outputs one still image designated by a user. A digital broadcast receiving apparatus for outputting an image signal for displaying a still image data, a receiving means for sequentially receiving a plurality of the still image data, and one or a plurality of still images which will be designated by a user. Prediction means for predicting an image, and still image capture means for capturing still image data for a still image predicted by the prediction means among the plurality of still image data received by the reception means into the storage means, A designation accepting unit for accepting a designation of a still image by a user; and a designation accepting unit among one or a plurality of still image data stored in the storage unit. Still picture data for one still image according to a specified Tagged user decompresses characterized in that it comprises an extension output means for outputting as an image signal. Thus, the digital broadcast receiving apparatus according to the present invention, when a plurality of still image data is transmitted from the digital broadcast transmitting apparatus, receives the plurality of still image data, and receives the plurality of still image data Among them, one or more items that the user will select are predicted and stored in the storage unit prior to the user's selection operation. In this case, the probability of quickly outputting an image signal for displaying the still image is increased.

Further, the receiving means further includes a link indicating which of the plurality of still images is a still image which can be designated by a user in a state where an image signal relating to the still image is output. Receiving the information and storing the information in the storage means, wherein the prediction means will be specified by the user by referring to the connection information stored in the storage means by the reception means 1 Alternatively, a plurality of still images can be predicted. Thereby, the digital broadcast receiving apparatus according to the present invention, while outputting the image signal of a certain still image, information indicating which still image can be selected by the user next, that is, Since connection information indicating a connection relationship between still images is received, by referring to this to predict still image data to be stored in the storage unit, for example,
It is not necessary to store still images having no connection relation in the storage means, and the storage area capacity of the storage means for storing still image data can be reduced.

Further, the digital broadcast receiving apparatus according to the present invention receives the first type data and the second type data transmitted from the digital broadcast transmitting apparatus, and outputs a signal based on these data. A device,
A signal output unit for outputting a signal based on the input data; a receiving unit for receiving the first type data and the second type data; and extracting the first type data from the data received by the receiving unit A first extracting means,
A second extraction unit for extracting the second type data from the data received by the reception unit; a first transfer of the first type data from the first extraction unit to the signal output unit; Transfer control means for arbitrating the second transfer of the data from the second extraction means to the signal output means, wherein the transfer control means does not require the first transfer or the second transfer. A transfer necessity detecting unit that detects that the transfer has occurred and that the need has not occurred, and stores priority information indicating which of the first transfer and the second transfer is preferentially performed. A priority information storage unit, which exclusively assigns a transfer right to any one of the first transfer and the second transfer, and a transfer necessity is generated by the transfer necessity detecting unit. Is detected To, the transfer rights granted to the transfer need for transfer is occurring, the first transfer and the second
If the need arises for both transfer and
While the necessity arises, the transfer right is granted to the one in which the necessity arises first, and the necessity does not arise in any of the first transfer and the second transfer. For example, a transfer right granting unit that grants the transfer right to the transfer to be preferentially performed with reference to the priority information storage unit, and the transfer necessity detecting unit of the first transfer or the second transfer And a transfer execution unit that executes the transfer when the transfer right is granted by the transfer right granting unit for the transfer for which the need for the transfer is detected. Thereby, the digital broadcast receiving apparatus according to the present invention can control the transfer according to the importance of the data to be transferred, for the data transfer for expanding and outputting the received data,
Still image data can also be preferentially treated as a method of arbitrating the transfer of still image data and video data, so that the probability of quickly displaying the still image selected by the user is increased.

Further, the first type data is graphic data for displaying graphics, the second type data is moving image data for displaying moving images, and the priority information storage section includes: Priority information indicating that transfer of the graphic data is preferentially performed is stored, and the right granting unit determines which of the first transfer and the second transfer is to be performed by the transfer necessity detecting unit. Also, when it is detected that the necessity has not occurred, the transfer right is granted to the first transfer, and the output unit outputs graphics and video based on the input graphic data and the moving image data. It is also possible to output an image signal for superimposing and displaying a moving image. Accordingly, the digital broadcast receiving apparatus according to the present invention can quickly display a graphic display such as a program guide and superimpose a moving image on the background.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus 600 according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a byte conversion circuit 612.

FIG. 3 is an image diagram showing a relationship between still images.

FIG. 4 is a diagram showing the contents of a still image information table.

FIG. 5 is a flowchart of a process of storing a plurality of still image data items that may be selected by a user in a main storage 110;

FIG. 6 is a digital broadcast receiving apparatus 16 according to a third embodiment.
FIG. 2 is a block diagram showing a configuration of a 00.

FIG. 7 is a diagram illustrating a display surface on which video and graphics are displayed in an overlapping manner.

FIG. 8 is a functional block diagram of an arbitration circuit 1700 that is normally considered.

FIG. 9 is a flowchart showing a processing flow of a transfer right setting unit 1709 in a conceivable arbitration circuit 1700.

FIG. 10 shows A in a normally conceivable arbitration circuit 1700.
5 is a flowchart showing a processing flow of a transfer right check unit 1701 of FIG.

FIG. 11 is a processing timing diagram of the arbitration circuit 1700 which is normally considered.

FIG. 12 is a functional block diagram of an arbitration circuit 1615 according to the present invention.

FIG. 13 is a transfer right setting unit 2 in the arbitration circuit 1615.
709 is a flowchart showing the processing flow of 709.

14 is a flowchart showing a processing flow of an A transfer right check unit 2701 in the arbitration circuit 1615. FIG.

FIG. 15 is a processing timing chart of the arbitration circuit 1615.

FIG. 16 is a digital broadcast receiving apparatus 3 according to the fifth embodiment.
FIG. 3 is a block diagram showing a configuration of the first embodiment.

FIG. 17 is a diagram showing an operation image of still image selection.

FIG. 18 is a diagram illustrating an image of still image data transmitted from the digital broadcast transmitting apparatus side.

FIG. 19 is a block diagram showing a configuration of a conventional digital broadcast receiving apparatus 100.

[Explanation of symbols]

 100, 600, 1600 Digital broadcast receiving apparatus 102, 602, 1602 Demodulation unit 103, 603, 1603 Transport decoder 104, 604, 1604 Local memory 105, 605, 1605 MPEG decoder 106, 606, 1606 Local memory 107 Only for compressed data stream Input port 109, 609, 1609 CPU 110, 610, 1610 Main memory 111, 1611 Serial / parallel conversion circuit 113, 613, 1613 Decompression circuit 114, 614, 1614 Display circuit 608, 1608 CPU access port 612, 1612 Byte conversion circuit 702 Input Buffer 703 Data selector 705 Output order determination register 707 Counter 1607 Stream input port 1615 Arbitration circuit 2701 A Transfer right checking unit 2702 Transfer control unit of A 2703 Transfer request holding unit of A 2704 Transfer right holding unit of A 2705 Transfer right checking unit of B 2706 Transfer control unit of B 2707 Transfer request holding unit of B 2708 Holding of transfer right Unit 2709 transfer right setting unit 2710 transfer counter 2711 priority holding unit

Claims (13)

[Claims] 1. A digital broadcast receiving apparatus for receiving a plurality of still image data repeatedly transmitted from a digital broadcast transmitting apparatus and displaying one still image designated by a user, comprising: a storage unit; Receiving means for sequentially receiving a plurality of the still image data; predicting means for predicting one or a plurality of still images which will be designated by a user prior to the designation; and a plurality of the plurality of still images received by the receiving means. A still image capturing unit that captures still image data of a still image predicted by the prediction unit from the still image data into the storage unit; a designation receiving unit that receives a still image designation by a user; Out of one or a plurality of still image data stored in the still image data for one still image specified by the user received by the specification receiving unit. And a display means for displaying the still image based on the digital broadcast. 2. The method according to claim 1, wherein the receiving unit further displays a still image that can be designated by a user when the still image is displayed for each of the plurality of still images. Receiving the information and storing it in the storage means, wherein the prediction means will be designated by the user by referring to the connection information stored in the storage means by the reception means 1 2. The digital broadcast receiving apparatus according to claim 1, wherein a plurality of still images are predicted. 3. The prediction unit refers to the connection information stored in the storage unit, and associates the still image displayed by the display unit with a designation of the still image by a user. 3. The digital broadcast receiving apparatus according to claim 2, wherein one or a plurality of still images which will be specified by the user by at least one subsequent specifying operation are predicted. 4. The specification receiving unit receives a user's specification of a still image even while the still image capturing unit is capturing still image data into the storage unit. When a still image according to the designation is displayed by the display unit as a result of the designation being accepted by the designation accepting unit, the prediction result performed so far is discarded, and the prediction is newly started, When the designation is accepted by the designation accepting unit, if the still image data for one still image according to the designation is not stored in the storage unit yet, Is stored in the storage unit, and when the prediction result is discarded by the prediction unit and a new prediction is started, a still image of the still image newly predicted by the prediction unit is stored. Digital broadcast receiving apparatus according to claim 3, wherein the capturing over data in the storage means. 5. The display device according to claim 5, wherein the still image data is digitally compressed and transmitted from the digital broadcast transmitting apparatus, and the display means is a memory for storing data to be displayed. Unit, an expansion unit that expands the digitally compressed data, and an image display unit that displays an image based on the data stored in the display data storage unit, wherein the display unit uses the expansion unit. 5. The digital image processing apparatus according to claim 4, wherein the still image data according to the user's designation is expanded and stored in the display data storage unit to display the still image using the image display unit. Broadcast receiver. 6. The decompression unit decompresses the still image data specified by a user by executing a computer program, wherein the still image data is transmitted together with video data from the transmission device for digital broadcasting. The digital broadcast receiving apparatus further includes a video receiving unit that receives the video data, and the display unit further includes the display data of the still image data according to a user's designation expanded by the expansion unit. A first transfer to a storage unit, and a second transfer of the video data received by the video reception unit to the display data storage unit.
A transfer control unit that performs transfer while arbitrating, wherein the transfer control unit detects that the necessity of the first transfer or the second transfer has occurred and that the necessity has not occurred A transfer necessity detecting unit for exclusively granting a transfer right to any one of the first transfer and the second transfer, and the necessity of the transfer is generated by the transfer necessity detecting unit When it is detected that the transfer is required, the transfer right is given to the transfer in which the transfer is necessary, and if the need is generated in both the first transfer and the second transfer, If the necessity arises together, the transfer right is granted to the one in which the necessity arises first, and the necessity does not arise in any of the first transfer and the second transfer. If the transfer right is added to the first transfer, A transfer right granting unit, and the transfer right granting unit assigns the transfer right to the transfer, of the first transfer or the second transfer, for which the transfer necessity detecting unit detects that the transfer necessity arises. 6. The digital broadcast receiving apparatus according to claim 5, further comprising: a transfer execution unit that executes the transfer when provided. 7. The image display unit includes a transfer unit that transfers the still image data specified by a user from the storage unit to the decompression unit, wherein the transfer unit is configured to receive n (n Is an integer of 2 or more) and an input buffer for temporarily storing 8-bit data; and n bytes are one word, and the still image data is taken out from the storage means and stored in the input buffer n bytes at a time. CPU, a counter for counting from 0 to (n-1) or from (n-1) to 0, and an output order storage for storing in advance a value indicating whether to advance the counter in ascending or descending order A data selection unit for selecting any one of the n 8-bit data stored in the input buffer according to the value of the counter; and a data selection unit selected by the data selection unit. Digital broadcast receiving apparatus according to claim 5, characterized in that the Ttodeta and a data output unit to be transferred to the expansion unit. 8. The connection information is repeatedly transmitted from the transmission device, and the receiving unit receives the connection information transmitted from the transmission device and stores the connection information only once in the storage unit. 4. The digital broadcast receiving device according to claim 3, wherein: 9. The link information is paired with each of the still image data, and is specified next by a user when a still image is displayed by the display means based on the still image data. A plurality of link information indicating which still images are possible, wherein the plurality of link information are repeatedly transmitted from the transmitting device, and the receiving unit includes a plurality of link information transmitted from the transmitting device. Receiving the link information and sequentially storing the link information in the storage unit, wherein the prediction unit is displayed by the display unit among the plurality of link information stored in the storage unit by the reception unit. By referring to one piece of link information that is paired with the still image data of the still image that is present, the user can perform one designation operation following the designation of the still image by the user. Digital broadcast receiving apparatus according to claim 3, wherein the predicting one or more still images will be designated to use user. 10. Receiving a plurality of digitally compressed still image data repeatedly transmitted from a digital broadcast transmitting apparatus, and outputting an image signal for displaying a single still image specified by a user. A digital broadcast receiving apparatus, comprising: a storage unit; a receiving unit configured to sequentially receive a plurality of the still image data; a prediction unit configured to predict one or a plurality of still images to be specified by a user; Means for capturing still image data of the still image predicted by the prediction means from among the plurality of still image data received by the means into the storage means, and designation for accepting designation of a still image by a user Receiving means, and one or a plurality of still image data items stored in the storage means, the one image data being related to the user's specification received by the specification receiving means; A digital broadcast receiving apparatus comprising: a decompression output unit that decompresses still image data of a still image and outputs the decompressed still image data as an image signal. 11. The connection means for indicating which of the plurality of still images is a still image which can be designated by a user in a state where an image signal relating to the still image is output. Receiving the information and storing it in the storage means, wherein the prediction means will be designated by the user by referring to the connection information stored in the storage means by the reception means 1 11. The digital broadcast receiving apparatus according to claim 10, wherein a plurality of still images are predicted. 12. A digital broadcast receiving apparatus that receives first type data and second type data transmitted from a digital broadcast transmitting apparatus and outputs a signal based on the data. A signal output unit that outputs a signal based on the first type data and the second type data; a first extraction unit that extracts the first type data from the data received by the receiving unit A second extraction unit that extracts the second type data from the data received by the reception unit; a first transfer of the first type data from the first extraction unit to the signal output unit; The second of the two types of data
Transfer control means for arbitrating the second transfer from the extraction means to the signal output means, wherein the transfer control means has a need for the first transfer or the second transfer; A transfer necessity detection unit that detects that the necessity has not occurred; and a priority information storage unit that stores priority information indicating which one of the first transfer and the second transfer is preferentially performed. And exclusively granting a transfer right to either the first transfer or the second transfer, and the transfer necessity detecting unit detects that the necessity of the transfer has occurred. The transfer right is granted to the transfer for which the need for transfer has occurred, and if the need for both the first transfer and the second transfer has occurred, the need for both While it is occurring, the need first The transfer right is given to the person in which the transfer has occurred, and if neither the first transfer nor the second transfer has the necessity, the priority is referred to the priority information storage unit. A transfer right granting unit for granting the transfer right to the transfer to be performed, and a transfer in which the transfer necessity detecting unit of the first transfer or the second transfer is detected as having a need for transfer. And a transfer execution unit that executes the transfer when the transfer right is granted by the transfer right granting unit. 13. The first type data is graphic data for displaying graphics, the second type data is moving image data for displaying a moving image, and the priority information storage unit is: Priority information indicating that the transfer of the graphic data is to be performed preferentially is stored, and the right granting unit determines which of the first transfer and the second transfer is performed by the transfer necessity detecting unit. When it is detected that the necessity does not arise, the transfer right is granted to the first transfer, and the signal output unit performs graphics based on the input graphic data and the moving image data. The digital broadcast receiving apparatus according to claim 12, wherein the digital broadcast receiving apparatus outputs an image signal for superimposing and displaying a moving image.