JP2010177962A - Broadcasting apparatus and broadcast receiving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcasting apparatus and a broadcast receiving apparatus for implementing a broadcast receiving apparatus that can shorten a station selection time with as little power consumption as possible. <P>SOLUTION: A broadcasting apparatus 100 transmits a broadcast signal on the basis of first stream data generated from data of I frame separated from video data included in a service or from data of several frames including I frame and second stream data generated from the data excluding the data of frames separated out of the video data included in the service. A broadcast receiving apparatus 101 starts to receive the first stream data from among the received broadcast signal, and if a service is selected after the reception is started, displays the image data of the received first stream data on a display section. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a broadcasting apparatus that transmits a multi-channel digital broadcast and a broadcast receiving apparatus that receives the broadcast.

  MediaFLO (registered trademark) is known as a broadcasting service for portable terminals. MediaFLO is a multi-channel digital broadcasting service for mobile terminals, and distributes video and music using technology suitable for mobile environments. The air interface of MediaFLO is called FLO (Forward Link Only), and Orthogonal Frequency Division Multiplexing (OFDM) is adopted for the physical layer of FLO (see Non-Patent Document 1).

  For example, the specification of an American MediaFLO that currently provides commercial services will be described. FIG. 14 is a diagram showing an FLO interlace configuration. FLO uses a bandwidth of 6 MHz, and the number of subcarriers is 4096. Of these 4096 subcarriers, the actual subcarriers used are 4000 excluding 96 guard subcarriers. MediaFLO divides 4000 subcarriers into groups called 8 interlaces. Each interlace is composed of 500 subcarriers selected every 8 out of 4000 subcarriers. Since one interlace is used as a pilot symbol, the remaining seven interlaces are used for data transmission. In MediaFLO, service (video, audio, subtitles, etc.) is assigned to a frequency band with one interlace as a minimum unit.

  FIG. 15 is a diagram illustrating an example of service allocation to interlace. The interlace on the vertical axis represents division on the frequency axis, and the horizontal axis represents division on the time axis. Each service of MediaFLO is carried on a logical channel called MLC (Multicast Logical Channel). An MLC is composed of one or more interlaces and one or more OFDM symbols. The ranges surrounded by thick lines in FIG. 15 represent different MLCs, and data such as video, audio, and captions is stored in each MLC. For example, a service (program) composed of one video and one audio is composed of two MLCs. Further, for example, in order to view a service including only the MLC indicated by the oblique lines in FIG. 15, it is only necessary to decode only the interlace and the OFDM symbol that configure the MLC. As described above, in MediaFLO, the service is divided into the time domain and the frequency domain, and only necessary MLCs are selectively decoded (intermittent reception), thereby reducing the power consumption of the receiving apparatus. I can plan. In MediaFLO, it is possible to receive all MLCs arranged in MediaFLO data transmission interlace and OFDM symbols with one tuner, so that more MLCs can be decoded simultaneously and multiple services can be viewed simultaneously. It is also possible.

  In MediaFLO, data is transmitted in a data transmission unit called a super frame as shown in FIG. The time width of one superframe is about 1 second, and includes 1200 OFDM symbols therein. The super frame includes a TDM pilot 1 channel, a TDM pilot 2 channel (hereinafter referred to as a pilot channel), a plurality of data frames, and the like. In a plurality of data frames, I frames or P frames are arranged as video data. Here, as shown in FIG. 17, the I frame is not necessarily arranged in the head data frame in the super frame. Decoding of video data starts from an I frame.

  The channel selection flow in MediaFLO is as follows. First, after the channel selection instruction is given by the user, the pilot channel is supplemented. Next, superframe supplementation is performed based on the supplemented pilot channel. When a plurality of data frames in the supplemented super frame are detected from the top data frame and an I frame is arranged in the data frame, the I frame is decoded, and the service selected based on the decoded data is selected. indicate.

  In Patent Document 1, when reception of digital broadcast is not selected by the user, at least one frame of the video signal for each reception channel is stored in the video signal memory, and reception of the digital broadcast program is selected by the user. In this case, there is disclosed a technique related to control of a receiving device that reads out a video signal stored in the video signal memory and allows a user to select the video signal.

JP 2004-128942 A

Nikkei Electronics, December 17, 2007, p. 150-161, Digital TV Seminar, 1st MediaFLO, “Broadcast for mobiles that can coexist with 1Seg, accommodating over 20 channels in 6 MHz width”

The above-mentioned MediaFLO has a problem that it takes time to select a channel, and it takes about 1.5 seconds to select a channel. This problem is that the unit time width of the superframe is about 1 second, so that it may take time to supplement the pilot channel after the user selects a channel, and in the data frame that is in a plurality of superframes. This is because the data of the I frame is not necessarily arranged in the head data frame, and it may take time to detect the I frame.
Therefore, the actual screen display switching at the time of channel selection is as shown in FIG. 18, and nothing is displayed on the screen until the video of the selected service is displayed.
Further, in the technique disclosed in Patent Document 1, when storing at least one frame of the video signal for each channel not selected by the user in the video signal memory, it must be received until the I frame can be received. Electric power increases.
The present invention has been made in view of such problems, and an object of the present invention is to provide a broadcast apparatus and a broadcast for realizing a broadcast receiving apparatus capable of reducing the channel selection time with as little power consumption as possible. To provide a receiving apparatus.

  In order to achieve the above object, the present invention provides a broadcasting apparatus for transmitting a broadcast signal, wherein first stream data is obtained by separating I frame or several frames of data including I frame from video data included in each service. And a control unit that controls to generate second stream data from data excluding the separated frame data of the video data included in the service, the first stream data, and the first data 2 stream data, and a transmission unit that transmits a broadcast signal based on the stream data.

  In addition, the present invention is a broadcast receiving apparatus that receives a broadcast signal, the first stream data generated from data of several frames including I frames or I frames separated from video data included in each service; Receiving a broadcast signal based on second stream data generated from data excluding the separated frame data among video data included in the service, and a display unit for displaying video data A control unit that controls to display video data of a service on the display unit based on the first stream data and the second stream data, and the control unit includes, among the broadcast signals, Reception of the first stream data is started, and after the reception starts, service selection is performed. If it has been performed, and controls to display the image data of the first stream data the received on the display unit.

  In the broadcast receiving apparatus, the control unit starts receiving first stream data related to a service other than the service of video data displayed on the display unit from the broadcast signal. When a service is selected after being started, it is preferable to control to display the received video data of the first stream data on the display unit.

  According to the broadcast device and the broadcast reception device according to the present invention, the broadcast device generates the first stream data by separating I frame or several frames of data including the I frame from the video data included in each service, A second stream data is generated from data excluding the separated frame data, a broadcast signal based on the first stream data and the second stream data is transmitted, and a broadcast receiving device includes the first signal among the broadcast signals. When the reception of the first stream data is started and the service is selected after the reception is started, the video data of the first stream data is displayed on the display unit. The waiting time until the video data is displayed can be shortened. Further, since the broadcast receiving apparatus needs to receive only the first stream data in advance in order to reduce the channel selection time, the channel selection time can be reduced with as little power consumption as possible.

It is a figure which shows the broadcasting apparatus and broadcast receiving apparatus of this invention. It is a figure which shows the structural example of a broadcast apparatus. It is a figure which shows the structural example of a broadcast receiver. It is a flowchart which shows operation | movement after a broadcast apparatus produces | generates the video data of a service until it transmits. It is a flowchart of the zapping process which concerns on 1st Embodiment in a broadcast receiver. It is a flowchart of the zapping process which concerns on 2nd Embodiment in a broadcast receiver. It is a flowchart of the zapping process which concerns on 3rd Embodiment in a broadcast receiver. It is a flowchart of the zapping process which concerns on 4th Embodiment in a broadcast receiver. It is a figure which shows the production | generation method of main MLC and another MLC in case another MLC is only the head I frame in each super frame in a broadcasting apparatus. It is a figure which shows the production | generation method of main MLC and another MLC in case another MLC is several frames including the head I frame in each super frame in a broadcasting apparatus. It is a figure which shows the production | generation method of the sub MLC in a broadcasting apparatus. It is a figure which shows switching of the video at the time of channel selection in the broadcast receiving apparatus when another MLC is only the first I frame of each super frame in the present invention. It is a figure which shows the switching of the image | video at the time of channel selection in the broadcast receiver in case another MLC includes several frames including the first I frame of each super frame. It is a figure which shows the interlace structure of FLO. It is a figure which shows the example of allocation of the service with respect to an interlace. It is a figure which shows the super frame (Super Frame) of MediaFLO. It is a figure which shows the arrangement | sequence of the video data of MLC of a certain service in a super frame. It is a figure which shows the switching of the conventional video display.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a broadcasting apparatus and a broadcast receiving apparatus of the present invention. The broadcast receiving apparatus 101 receives a broadcast signal transmitted from the broadcast apparatus 100, decodes and outputs various data.

  FIG. 2 is a diagram illustrating a configuration example of the broadcasting apparatus illustrated in FIG. The broadcasting apparatus includes a broadcast data generation unit 200, a multiplexing processing unit 204, a modulation unit 205, and a transmission unit 206. The broadcast data generation unit 200 includes a service generation unit 201, a data separation unit 202, and a stream generation unit 203.

The service generation unit 201 generates data of one or more services to be broadcast. The data separation unit 202 separates the first I frame or several frames of data including the first I frame from the video data of each service, for example, every second. The stream generation unit 203 divides service data (first stream data) separated by the data separation unit 202 and service data (second stream data) remaining after separation by the data separation unit 202 into different streams. Regenerate as main stream.
The multiplexing processing unit 204 multiplexes different streams of the plurality of services generated by the stream generation unit 203 together as a single substream if necessary.
The modulation unit 205 modulates the stream generated by the stream generation unit 203 and the stream multiplexed by the multiplexing processing unit 204 into an OFDM signal.
The transmission unit 206 amplifies the OFDM signal to a set value, and outputs (a broadcast signal is transmitted) from the transmission antenna. At this time, the main stream, separate stream, and substream are transmitted from the transmission unit 206 as main MLC, separate MLC, and sub-MLC, respectively.

FIG. 3 is a diagram illustrating a configuration example of the broadcast receiving apparatus illustrated in FIG. 1. The broadcast receiving apparatus includes a tuner 300, a demodulation unit 301, an audio decoder unit 302, an audio output unit 303, a video decoder unit 304, a video display unit 305, a control unit 306, a storage unit 315, and an operation unit. 320.
The control unit 306 includes a zapping determination unit 307, a video data integration unit 308, a reception MLC control unit 309, another MLC / sub-MLC decoded data display control unit 310, a service viewing duration measurement unit 311, and a service viewing continuation. The time determination unit 312, the reception-specific MLC selection mode switching control unit 313, and the sub-MLC data separation unit 314 are configured.
The storage unit 315 includes another MLC / sub-MLC video data storage unit 316, a service viewing duration storage unit 317, a viewing mode storage unit 318, and a reception-specific MLC storage unit 319.
The operation unit 320 includes a service channel selection operation unit 321, a zapping mode / normal viewing mode switching unit 322, and a reception-specific MLC selection mode switching unit 323.

  The tuner 300 receives a broadcast wave (receives a broadcast signal). The demodulator 301 demodulates the broadcast wave received by the tuner 300 and extracts necessary data. The audio decoder unit 302 decodes audio data of the viewing service. The audio output unit 303 outputs the audio data decoded by the audio decoder unit 302. The video decoder unit 304 decodes video data of the viewing service. The video display unit 305 displays the video data decoded by the video decoder unit 304.

  The zapping determination unit 307 determines whether or not zapping is performed. The video data integration unit 308 integrates the main MLC, another MLC, or main MLC and sub MLC video data. The reception MLC control unit 309 controls the received MLC. The separate MLC / sub-MLC decoded data display control unit 310 controls to display the decoded data of another MLC or sub-MLC of the service selected at the time of zapping. The service viewing duration measuring unit 311 measures the viewing duration of the service being viewed. The service viewing duration determination unit 312 determines whether or not the service viewing duration has exceeded a threshold for stopping reception of another MLC for a service other than the currently viewed service. The per-reception MLC selection mode switching control unit 313 controls switching to a per-reception MLC selection mode (a mode for selecting a different MLC to be received other than the service being received at the start of zapping). The sub MLC data separation unit 314 separates the sub MLC data into data for each service.

  The separate MLC / sub-MLC video data storage unit 316 stores the received video data of the separate MLC and sub-MLC. The service viewing duration storage unit 317 stores the service viewing duration. The viewing mode storage unit 318 receives, as a viewing mode, a zapping mode (a mode for receiving another MLC for one or more services) or a normal viewing mode (a mode for receiving only another MLC of the selected service among the other MLCs). ) Is stored. The reception-specific MLC storage unit 319 stores another MLC selected in the reception-specific MLC selection mode.

  The service channel selection operation unit 321 selects a service. The zapping mode / normal viewing mode switching unit 322 switches between the zapping mode and the normal viewing mode. The reception-specific MLC selection mode switching unit 323 switches between the reception-specific MLC selection mode and the mode for viewing the selected service.

FIG. 4 is a flowchart showing an operation from the generation of the service video data to the transmission by the broadcasting apparatus of the present invention.
First, the broadcast apparatus generates data of one or more services to be transmitted by the service generation unit 201 (S101). Next, the data separation unit 202 separates data of several frames including the first I frame or the first I frame in units of one second in the video data stream of each service (S102). Further, the stream generation unit 203 generates a main stream and another stream from the remaining data and the separated data (S103). Further, if necessary, the multiplexing processing unit 204 multiplexes different streams of a plurality of services as one substream (S104, S105). Thereafter, the modulation unit 205 modulates each stream into an OFDM signal (S106), and the transmission unit 206 transmits the main stream, the separate stream, and the substream as a main MLC, another MLC, and a sub MLC, respectively (S107).

FIG. 5 is a flowchart of the zapping process according to the first embodiment in the broadcast receiving apparatus. The first embodiment is an operation in the case where the viewing continuation time exceeds the threshold as a trigger for the end of another MLC reception of each service. It is assumed that the receiving apparatus is turned on at the time of start, and the processing of this flowchart is continued while the viewing application is activated.
In the broadcast receiving apparatus, first, the control unit 306 determines whether or not a service channel selection process has been performed by the service channel selection operation unit 321 (S201). When the service channel selection process is performed (in the case of Yes), the service viewing duration storage unit 317 is initialized (S202). Next, another MLC for each service is received by the reception MLC control unit 309 (reception of first stream data related to a service other than the video data service displayed on the display unit is started). Is determined (S203). When another MLC of each service is received (in the case of Yes), the data of another MLC of the selected service that has been acquired in advance and stored in another MLC / sub-MLC video data storage unit 316, Under the control of the separate MLC / sub-MLC decoded data display control unit 310, the decoded data is displayed on the video display unit 305 (S204). When another MLC for each service is not received (in the case of No), another MLC for each service is received under the control of the reception MLC control unit 309 (services other than the video data service displayed on the display unit) (S205), and then receives the main MLC of the selected service (S206). Thereafter, the video data integration unit 308 combines the video data of the main MLC and the video data of another MLC and decodes it as one service (S207), and displays the decoded data of the service on the video display unit 305 (S208). ). Next, the service viewing duration measuring unit 311 starts measuring the viewing duration after starting the service viewing (S209).

  Whether or not the service viewing duration is being measured by the service viewing duration determination unit 312 after the start of measurement of the service viewing duration or when the channel selection process of the service is not performed in S201 (No). Is determined (S210). If the measurement is not being performed (in the case of No), if the application is being activated, the service tuning process is determined again (S201). When the measurement is being performed (in the case of Yes), the service viewing duration determination unit 312 determines whether the viewing duration has exceeded the threshold (S211). If the service viewing duration does not exceed the threshold (No), the service tuning process is determined again (S201). When the service viewing duration exceeds the threshold (in the case of Yes), the user is highly likely to continue viewing the selected service. Therefore, it is determined that zapping has ended, and power consumption is reduced in order to save power. Under the control of the control unit 309, reception of another MLC for services other than the selected service is stopped (S212), and measurement of the service viewing duration is stopped (S213). If the application is running, the service tuning process is determined again (S201). If the application is not running, the process of the flowchart is terminated.

FIG. 6 is a flowchart of the zapping process according to the second embodiment in the broadcast receiving apparatus. The second embodiment is an operation in the case of having a mode for selecting another MLC to be received. It is assumed that the receiving apparatus is turned on at the time of start, and the processing of this flowchart is continued while the viewing application is activated.
In the broadcast receiving apparatus, first, the control unit 306 determines whether or not a service channel selection process has been performed by the service channel selection operation unit 321 (S301). When the channel selection process of the service is performed (in the case of Yes), another MLC of the selected service is received by the reception MLC control unit 309 (other than the video data service displayed on the display unit) It is determined whether or not reception of the first stream data relating to the service has started (S302). When another MLC of the selected service is received (in the case of Yes), the data of the other MLC of the service that has been acquired in advance and stored in the separate MLC / sub-MLC video data storage unit 316 is obtained. Under the control of the separate MLC / sub-MLC decoded data display control unit 310, the decoded data is displayed on the video display unit 305 (S303). After displaying the decoded data, the main MLC of the selected service is received under the control of the reception MLC control unit 309 (S304).
If another MLC of the selected service is not received in S302 (in the case of No), the main MLC and the other MLC of the selected service are received together under the control of the reception MLC control unit 309 (S305). Thereafter, the video data integration unit 308 combines the video data of the main MLC and the video data of another MLC and decodes it as one service (S306), and displays the decoded data on the video display unit 305 (S307).

After the service display process for the channel selection process of the service or when the channel selection process of the service is not performed in S301 (in the case of No), the reception MLC control unit 309 causes the MLC selection mode switching button for each reception (MLC selection by reception It is determined whether or not the mode switching unit 323) is pressed (S308), and when the reception-specific MLC selection mode switching button is pressed (Yes), the video display unit 305 is the reception-specific MLC selection mode screen. It is determined whether or not (S309). If it is the reception-specific MLC selection mode screen (in the case of Yes), the video display unit 305 is switched to the selected service under the control of the reception-specific MLC selection mode switching control unit 313 (S310). In this case, since there is a high possibility that the user will continue to watch the current service, reception of another MLC for services other than the selected service is stopped in order to save power (S311).
In S309, if the video display unit 305 is not the reception-specific MLC selection mode screen but the video of the selected service (in the case of No), the video display unit 305 is controlled by the reception-specific MLC selection mode switching control unit 313. Then, the screen is switched to the reception-specific MLC selection mode screen (S312). Next, when the user selects another MLC to be received, reception of the selected other MLC is started under the control of the reception MLC control unit 309 (a first service related to a service other than the video data service displayed on the display unit). (S313).
If the button is not pressed (No) in S308, and if the reception of another MLC is stopped in S311, if the application is running, the service is started again. Is determined (S301). If the application is not running, the process of the flowchart is terminated.

FIG. 7 is a flowchart of the zapping process according to the third embodiment in the broadcast receiving apparatus. The third embodiment is an operation in the case of having a zapping mode and a viewing mode. In the zapping mode, another MLC for all services is received (reception of the first stream data is started). It is assumed that the receiving apparatus is turned on at the time of start, and the processing of this flowchart is continued while the viewing application is activated.
In the broadcast receiving apparatus, first, the control unit 306 determines whether or not a service channel selection process has been performed by the service channel selection operation unit 321 (S401). When the service channel selection processing is performed (Yes), the zapping determination unit 307 refers to the viewing mode storage unit 318 to determine whether the viewing mode is the zapping mode (S402). When the viewing mode is the zapping mode (in the case of Yes), another MLC / sub-MLC decoding of the selected MLC data of the selected service that has been acquired in advance and stored in the other MLC / sub-MLC video data storage unit 316 Under the control of the data display control unit 310, the decoded data is displayed on the video display unit 305 (S403). Then, the main MLC of the selected service is received under the control of the reception MLC control unit 309 (S404). In S402, when the viewing mode is not the zapping mode but the normal viewing mode (in the case of No), both the main MLC and another MLC of the selected service are received under the control of the reception MLC control unit 309 (S405). .
Thereafter, the video data integration unit 308 combines the video data of the main MLC and the video data of another MLC and decodes it as one service (S406), and displays the decoded data of the service on the video display unit 305 (S407).

After the service display process when there is a service channel selection process, or when the service channel selection process is not performed in S401 (No), the reception MLC control unit 309 causes the zapping mode switching button (zapping mode) It is determined whether or not the normal viewing mode switching unit 322) has been pressed (S408). When the zapping mode switching button is pressed (Yes), the zapping determination unit 307 determines whether or not the viewing mode is the zapping mode (S409). When the viewing mode is the zapping mode (in the case of Yes), the reception MLC control unit 309 switches to the normal viewing mode (S410) and stops receiving another MLC other than the selected service (S411). ). In S409, if it is the normal viewing mode (in the case of No), switching to the zapping mode is performed under the control of the reception MLC control unit 309 (S412), and another MLC for each service is received (S413).
After the processing for pressing the zapping mode switching button is completed, or when it is determined that the button is not pressed in the determination of pressing the zapping mode switching button in S408 (in the case of No), if the application is running, the selection is performed again. The station processing is determined (S401). If the application is not running, the process of the flowchart is terminated.

FIG. 8 is a flowchart of the zapping process according to the fourth embodiment in the broadcast receiving apparatus. The fourth embodiment is an operation in the case where the broadcasting apparatus collects different streams of each service as one substream and transmits the substream as a sub MLC. In the present embodiment, the sub-MLC is always received (reception of the first stream data is started). It is assumed that the receiving apparatus is turned on at the time of start, and the processing of this flowchart is repeated while the viewing application is activated.
In the broadcast receiving apparatus, first, the reception MLC control unit 309 determines whether or not the service channel selection processing has been performed by the service channel selection operation unit 321 (S501). When the channel selection processing of the service is performed (in the case of Yes), the sub MLC data separation unit 314 separates the data of the selected service in the sub MLC data (S502), and then the separated data Decoding is performed (S503), and the decoded data is displayed on the video display unit 305 (S504). Thereafter, the main MLC is received under the control of the reception MLC control unit 309 (S505), and the video data integration unit 308 combines the video data of the main MLC and the video data of the selected service in the sub-MLC into one. Decoding is performed as a service (S506), and the decoded data is displayed on the video display unit 305 (S507). If the application is running, the service tuning process is determined again (S401). If the application is not running, the process of the flowchart is terminated.

FIG. 9 is a diagram showing a method for generating a main MLC and another MLC when another MLC is only the first I frame in each superframe in the broadcasting apparatus of the present invention.
Another MLC of MLC1 including the video data of service 1 is generated by separating the first I frame of the video data of MLC1 in each super frame. The remaining P frame data becomes the main MLC. Note that the time series of the separated frames is important for data synchronization at the time of decoding, and therefore is not changed from before the separation after the separation.

FIG. 10 is a diagram showing a method for generating a main MLC and another MLC when another MLC includes several frames including the first I frame in each superframe in the broadcasting apparatus of the present invention.
The video frame data included in the separate MLC is the same as that of FIG. 9 except that the video frame data included in the separate MLC is several frames including the first I frame of the MLC video data that is the target of the generation of the separate MLC in each super frame.

FIG. 11 is a diagram showing a method for generating sub-MLCs in the broadcasting apparatus of the present invention.
As another MLC of MLC1, MLC2, MLC3,... Exists, it is necessary to maintain the time series as in the case of FIG. 9 and FIG. Generate. The video data in the sub-MLC has information on which MLC it is separated from.

FIG. 12 is a diagram showing video switching at the time of channel selection in the broadcast receiving apparatus when another MLC is only the first I frame of each super frame in the present invention.
When a channel is selected, first the data of another MLC of the selected service stored in the storage unit is decoded to display the decoded data of one I frame, and the video data of the main MLC and the other MLC are displayed. The combined data is displayed as soon as it is decoded as one service in combination. Until the combination data is displayed, the decoded data of one I-frame of another MLC remains displayed as a still image.

FIG. 13 is a diagram showing video switching at the time of channel selection in the broadcast receiving apparatus when another MLC includes several frames including the first I frame of each super frame in the present invention.
When a channel is selected, first the other MLC data of the selected service stored in the storage unit is decoded to display several frames starting from the I frame, and the main MLC and the video data of the other MLC are combined. As soon as it is decoded as one service, the combination data is displayed. Until the combination data is displayed, the last frame of several frames starting from the I frame of another MLC remains displayed as a still image.

  As described above, the broadcast device and the broadcast reception device according to the present invention generate the first stream data by separating the I frame or several frames of data including the I frame from the video data included in each service. And generating a second stream data from the data excluding the separated frame data, transmitting a broadcast signal based on the first stream data and the second stream data, and a broadcast receiving device including the broadcast signal When the reception of the first stream data is started and the service is selected after the reception is started, the channel selection is performed in order to display the video data of the first stream data on the display unit. In this case, the waiting time until the video data is displayed can be shortened. Moreover, since the broadcast receiving apparatus needs to receive only the first stream data in advance in order to shorten the channel selection time, the channel selection time can be shortened with as little power consumption as possible.

DESCRIPTION OF SYMBOLS 100 Broadcast apparatus 101 Broadcast receiving apparatus 200 Broadcast data generation part 201 Service generation part 202 Data separation part 203 Stream generation part 204 Multiplexing process part 205 Modulation part 206 Transmission part 300 Tuner part 301 Demodulation part 302 Audio | voice decoder part 303 Audio | voice output part 304 Video decoder unit 305 Video display unit 306 Control unit 307 Zapping determination unit 308 Video data integration unit 309 Reception MLC control unit 310 Separate MLC / sub-MLC decoded data display control unit 311 Service viewing duration measurement unit 312 Service viewing duration determination unit 313 MLC selection mode switching control unit for each reception 314 Sub MLC data separation unit 315 Storage unit 316 Separate MLC / sub MLC video data storage unit 317 Service viewing duration storage unit 318 Viewing mode storage unit 319 Shin-specific MLC storage unit 320 operation unit 321 service channel selection operation unit 322 zapping mode normal viewing mode switching unit 323 receives another MLC selection mode switching unit

Claims (3)

A broadcasting device for transmitting a broadcast signal,
The first stream data is generated by separating the I frame or several frames of data including the I frame from the video data included in each service, and the data of the separated frame is excluded from the video data included in the service A control unit that controls to generate second stream data from the data;
A transmission unit for transmitting a broadcast signal based on the first stream data and the second stream data;
Broadcasting device with A broadcast receiving device for receiving a broadcast signal,
The first stream data generated from the I frame separated from the video data included in each service or the data of several frames including the I frame, and the data of the separated frame among the video data included in the service. A receiver that receives a broadcast signal based on the second stream data generated from the excluded data;
A display for displaying video data;
A control unit that controls to display video data of a service on the display unit based on the first stream data and the second stream data,
The control unit starts receiving the first stream data of the broadcast signal, and when a service is selected after the reception is started, the control unit receives the first stream data received. A broadcast receiving apparatus that controls to display video data on the display unit. The broadcast receiving device according to claim 2,
The control unit starts receiving the first stream data related to a service other than the video data service displayed on the display unit in the broadcast signal, and selects the service after the reception is started. In the broadcast receiving apparatus, the video data of the received first stream data is controlled to be displayed on the display unit.

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