DE112016002358B4 - RECEIVING DEVICE, VIDEO DISPLAY DEVICE, AUDIO OUTPUT DEVICE AND RECEPTION PROCEDURE - Google Patents

Abstract

Receiving device (100, 200, 300), comprising:
a first processing unit (101, 201) that generates first reception data from a first reception signal to continuously output the first reception data and that is capable of changing an output rate of the first reception data;
a second processing unit (102, 202) that generates second reception data from a second reception signal to continuously output the second reception data and that is capable of changing an output rate of the second reception data;
an output switching unit that switches the output between the first reception data output from the first processing unit and the second reception data output from the second processing unit;
a difference amount detection unit (140, 240, 340) that detects a difference amount on a time axis between the first reception data and the second reception data; and
an output rate control unit (141, 241, 341) which, when the difference amount detected by the difference amount detection unit (140, 240, 340) is larger than a predetermined threshold, determines whether or not one-sided data of the first or the second reception data output by the output switching unit (144), and changes paths for delaying the one-sided data according to the result of the determination, wherein the one-sided data are those of the first and the second reception data, which are opposite to the other data from the first reception data and the second reception data Received data are advanced.

Description

Technical area

The present invention relates to a reception apparatus, a video display apparatus, an audio output apparatus and a reception method, and more particularly to a reception apparatus, a video display apparatus, an audio output apparatus and a reception method, each of which automatically switches the output signal.

State of the art

A moving body digital broadcasting receiving apparatus comes off a broadcasting area during a movement, or is affected by geographical features or structures on the ground, and therefore, in some cases, it is temporarily difficult to receive broadcasting waves. A branch station that broadcasts the same program in a different frequency band (channel) works for digital broadcasting. The broadcast areas generally overlap each other, and a conventional digital broadcast receiving apparatus has the function of automatically switching to another channel providing the same program when the reception is difficult.

In a broadcasting standard for digital terrestrial broadcasting for integrated services (ISDB-T), a full-segment service with high picture quality and high sound quality and a single-segment service with high reception intensity are broadcast in the same channel. In general, concurrent broadcasting is used for broadcasting the same program in both the one-segment service and the full-segment service, and a conventional digital broadcast receiving apparatus also has the function of automatically switching to the single-segment service when reception in the full-segment service becomes difficult.

Such a function of automatically switching to the same program has a drawback of picture skipping or switching skipping, since there are generally time differences of several seconds between the same programs. In order to solve the problem, a technique described below is proposed.

For example, when switching from a single-segment service in which the display time on a receiver is relatively behind a full-segment service in which the time is relatively advanced, the technique disclosed in Patent Document 1 does not perform the switching immediately, but performs the switching after data of the full segment service according to a time difference between the services, so that image skipping and sound skipping due to a time difference in the output time can be avoided. Patent Document 2 describes a receiving unit that receives contents whose transmission formats are different from each other. A switching unit switches the transmission format. A recognition unit detects the time difference between a first reproduction time associated with the content in the first transmission format and a second reproduction time associated with the content in the second transmission format. A control unit controls the reproduction rate of the content in the first transmission format according to the detected time difference. A reproducing unit reproduces the content in the first transmission format according to the control. Patent Document 3 describes digital reception apparatuses that mimic degraded reproduction as observed in analog reception apparatuses when a transmission path failure occurs. This is to prevent that target groups accustomed to analogue broadcasting experience discomfort in digital broadcasting. Patent Document 4 describes a gradual switching between two simultaneous broadcasting streams.

Documents of the prior art

Patent documents

• Patent Document 1: Japanese Patent Application Publication No. 2013-125986
• Patent Document 2: International Patent Application Publication WO 2008/117448 A1
• Patent Document 3: European Patent Application Publication EP 1394 973 A2
• Patent Document 4: US Patent Application Publication US 2006/0083315 A1

Summary of the invention

Problem to be solved by the invention

When the technique disclosed in Patent Document 1 detects a switching command between concurrent broadcasts, it has accumulated the image and audio information of a broadcast whose output time is relatively earlier, up to an accumulation amount corresponding to the time difference between the concurrent broadcasts, and then switches on picture and Sound around. Therefore, the switching is delayed until the accumulation time has elapsed since the switching was intended to be performed.

For example, when a receiving device detects that the receiving state of a full-segment broadcast is good after a user has selected a one-segment broadcast, a channel-selection switching request is automatically output from the one-segment broadcast to the full-segment broadcast. However, the actual switching of the pictures and the sounds is delayed by a period corresponding to a time difference between the full-segment broadcast and the one-segment broadcast, that is, several seconds.

When this technique is applied to the switching from the full-segment broadcasting to the one-segment broadcasting, the receiving state changes during this switching, and the quality of the full-segment broadcasting deteriorates. Consequently, it is impossible to seamlessly switch to the one-segment without either image skipping or sound skipping.

In addition, a delay of several seconds is also caused between contents when the switching is performed not only between the full-segment broadcast and the one-segment broadcast, but also between services broadcasting the same program over a plurality of channels, such as a relay station and a branch station between a broadcast for a fixed receiver and a broadcast for a mobile receiver, between a digital broadcast and an FM (Frequency Modulation) broadcast or an AM (Amplitude Modulation) broadcast or between different broadcasting methods such as between a broadcast and a streaming service through the Internet.

It is therefore an object of the present invention to enable seamless switching between contents to be received.

Means of solving the problem

A reception apparatus according to a first aspect of the present invention includes: a first processing unit that generates first reception data from a first reception signal to continuously output the first reception data and that is capable of changing an output rate of the first reception data; a second processing unit that generates second reception data from a second reception signal to continuously output the second reception data and that is capable of changing an output rate of the second reception data; an output switching unit that switches the output between the first reception data output from the first processing unit and the second reception data output from the second processing unit; a difference amount detection unit that detects a difference amount on a time axis between the first reception data and the second reception data; and an output rate control unit that controls the first processing unit or the second processing unit in such a manner that the output rate of one-side data of the first reception data and the second reception data is lower than a predetermined normal output rate when the difference amount detected by the difference amount detection unit is greater than a predetermined threshold, the one-sided data being data preceding the other data between the first receive data and the second receive data.

A reception apparatus according to a second aspect of the present invention includes: a first processing unit that generates first reception data from a first reception signal to continuously output the first reception data and that is capable of changing an output rate of the first reception data; a second processing unit that generates second reception data from a second reception signal to continuously output the second reception data and that is capable of changing an output rate of the second reception data; an output switching unit that switches the output between the first reception data output from the first processing unit and the second reception data output from the second processing unit; a difference amount detection unit that detects a difference amount on a time axis between the first reception data and the second reception data; and an output rate control unit that instructs the first processing unit or the second processing unit to temporarily stop the output of one-sided data of the first reception data and the second reception data when the difference amount detected by the difference amount detection unit is larger than a predetermined threshold value Data is data before the other data between the first reception data and the second reception data.

A reception method according to one aspect of the present invention includes: generating first reception data from a first reception signal to continuously output the first reception data; Generating second reception data from a second reception signal to continuously output the second reception data; Switching the output between the output of the first reception data and the output of the second reception data; Detecting a difference amount on a time axis between the output of first reception data and the output of second reception data; and Changing an output rate of at least one of the first reception data and the second reception data according to the detected difference amount.

Effects of the invention

According to one aspect of the present invention, seamless switching between contents to be received may be performed.

list of figures

• 1 Fig. 10 is a block diagram schematically illustrating a configuration of a content output device according to a first embodiment.
• 2 Fig. 12 is a block diagram schematically illustrating configurations of a first receiving unit and a second receiving unit according to the first embodiment.
• 3 (A) and 3 (B) 12 are schematic diagrams illustrating an example of a hardware configuration of the content output device according to the first embodiment.
• 4 FIG. 12 is a schematic diagram illustrating an example of hardware configurations of a first processing unit and a second processing unit according to the first embodiment. FIG.
• 5 (A) to 5 (C) FIG. 13 is first schematic drawings for describing an operation in a difference amount detection unit according to the first embodiment. FIG.
• 6 (A) to 6 (C) FIG. 14 is second schematic drawings for describing an operation in the difference amount detection unit according to the first embodiment. FIG.
• 7 (A) to 7 (C) Fig. 15 are third schematic drawings for describing an operation in the difference amount detection unit according to the first embodiment.
• 8 (A) to 8 (C) 14 are fourth schematic drawings for describing an operation in the difference amount detection unit according to the first embodiment.
• 9 Fig. 10 is a flowchart indicating an operation of an output rate control unit according to the first embodiment.
• 10 (A) and 10 (B) 12 are schematic diagrams illustrating a state of data output from a first output buffer unit and a second output buffer unit in a case where a content reproduction position of a foreground system is before that of a background system in the first embodiment.
• 11 (A) and 11 (B) 12 are schematic diagrams illustrating a state of data output from the first output buffer unit and the second output buffer unit in a case where a content reproduction position of the background system is ahead of that of the foreground system in the first embodiment.
• 12 Fig. 10 is a flowchart indicating operations of a reception operation command unit and a reception state monitoring unit according to the first embodiment.
• 13 Fig. 16 is a block diagram schematically illustrating a configuration of a content output device according to a variation of the first embodiment.
• 14 FIG. 15 is a block diagram schematically illustrating a configuration of a first processing unit according to the variation of the first embodiment. FIG.
• 15 FIG. 15 is a block diagram schematically illustrating a configuration of a second processing unit according to the variation of the first embodiment. FIG.
• 16 FIG. 12 is a schematic diagram illustrating hardware configurations of the first processing unit and the second processing unit according to the variation of the first embodiment. FIG.
• 17 Fig. 16 is a block diagram schematically illustrating a configuration of a content output device according to a second embodiment.
• 18 Fig. 12 is a block diagram schematically illustrating configurations of a first receiving unit and a second receiving unit according to the second embodiment.
• 19 FIG. 10 is a flowchart illustrating operations of a difference amount detection unit and an output rate control unit according to the second embodiment. FIG.
• 20 Fig. 16 is a block diagram schematically illustrating a configuration of a content output device according to a variation of the second embodiment.
• 21 FIG. 12 is a block diagram schematically illustrating the configuration of a first processing unit according to a variation of the second embodiment. FIG.
• 22 is a block diagram schematically showing a configuration of a second Processing unit according to the variation of the second embodiment illustrated.
• 23 Fig. 16 is a block diagram schematically illustrating a configuration of a content output apparatus according to the third embodiment.
• 24 Fig. 16 is a block diagram schematically illustrating a configuration of a content output device according to a variation of the third embodiment.

Type of embodiment of the invention

First embodiment

1 Fig. 16 is a block diagram schematically showing a configuration of a content output device 100 as a receiving device according to a first embodiment.

The content output device 100 contains a first processing unit 101 , a second processing unit 102 a difference amount detection unit 140 , an output rate control unit 141 , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 and a reception operation command unit 145 ,

A reception method according to the first embodiment is one of the content output device 100 performed procedure.

Each of the first processing unit 101 and the second processing unit 102 receives signals from streaming content of a digital broadcast, a digital television broadcast, an FM broadcast, an AM broadcast or the Internet, and generates reception data. The first processing unit 101 and the second processing unit 102 continuously output the generated reception data and are able to change the output rate of the reception data.

The first processing unit 101 contains a first receiving unit 110 and a clock generating unit 130 , The second processing unit 102 contains a second receiving unit 120 and the clock generation unit 130 ,

2 FIG. 12 is a block diagram schematically showing configurations of the first receiving unit. FIG 110 and the second receiving unit 120 illustrated.

The first receiving unit 110 receives signals and generates receive data. The first receiving unit 110 contains a first tuner unit 111 , a first demodulation unit 112 , a first demultiplexing unit 113 , a first input buffer unit 114 , a first decoder unit 115 and a first output buffer unit 116 ,

The first tuner unit 111 receives signals. The first tuner unit 111 then supplies the received signals to the first demodulation unit 112 , For example, the first tuner unit receives 111 Signals from streaming content of a digital broadcast, a digital television broadcast, an FM broadcast, an AM broadcast or the Internet.

The first demodulation unit 112 demodulates those from the first tuner unit 111 supplied received signals, whereby streaming data (digital data) are generated. The first demodulation unit 112 supplies the streaming data to the first demultiplexing unit 113 ,

The first demultiplexing unit 113 separates required data from that of the first demodulating unit 112 supplied streaming data. The first demultiplexing unit 113 then supplies the separated data to the first input buffer unit 114 , For example, in a digital broadcasting program, the first demultiplexing unit disconnects 113 Audio data of a selected service from the received streaming data. In a digital television broadcast, the first demultiplexing unit disconnects 113 Video data and audio data of a selected service. In the digital television broadcast contains the first input buffer unit 114 a video input buffer and an audio input buffer not shown in the drawings. In FM Broadcasting or AM Broadcasting, streaming data (audio data) provided by the first demodulation unit 112 are output to the first input buffer unit 114 delivered.

The first input buffer unit 114 temporarily stores the data from the first demultiplexing unit 113 supplied data and supplies the data to the first decoder unit 115 ,

The first decoder unit 115 decodes those from the first input buffer unit 114 received data, whereby receive data (content data) are generated. The first decoder unit 115 provides the receive data to the first output buffer unit 116 , For example, in a case where that of the first input buffer unit expands 114 supplied data is a compressed stream, the first decoder unit 115 the data of this stream, which generates receive data. In a case where the data is an uncompressed stream of AM broadcast or FM broadcast, the expansion processing is in the first decoder unit 115 not required, and thus provides the first decoder unit 115 that from the first input buffer unit 114 supplied data directly to the first output buffer unit 116 ,

The first output buffer unit 116 temporarily stores those from the first decoder unit 115 delivered receive data and delivers the receive data to the in 1 illustrated output switching unit 144 , Based on clock signals from the clock generation unit 130 delivers the first output buffer unit 116 the reception data to the output switching unit 144 , Here is the content output device 100 according to the first embodiment, by changing the clock signal from the clock generation unit 130 a rate (read rate) with which the receive data from the first output buffer unit 116 to the output switching unit 144 to be delivered, change. In other words, by changing the clock signal, the output rate of the reception data from the first output buffer unit 116 be changed.

The second receiving unit 120 receives signals and generates receive data. The second receiving unit 120 contains a second tuner unit 121 , a second demodulation unit 122 , a second demultiplexing unit 123 , a second input buffer unit 124 , a second decoder unit 125 and a second output buffer unit 126 ,

The second tuner unit 121 , the second demodulation unit 122 , the second demultiplexing unit 123 , the second input buffer unit 124 , the second decoder unit 125 and the second output buffer unit 126 work in the same way as the first tuner unit 111 , the first demodulation unit 112 , the first demultiplexing unit 113 , the first input buffer unit 114 , the first decoder unit 115 or the first output buffer unit 116 ,

According to 1 the receive data are from the first output buffer unit 116 and the reception data from the second output buffer unit 126 to the output switching unit 144 delivered. Each of the first output buffer unit 116 and the second output buffer unit 126 returns the receive data at a data output rate by the output rate control unit 141 is determined, that is, a data reproduction rate, to the output switching unit 144 out. More specifically, each of the first output buffer unit 116 and the second output buffer unit 126 is formed by a FIFO (first in first out) buffer. The output rate control unit 141 intended for the clock generation unit 130 each of the data output rates for each of the first output buffer unit 116 and the second output buffer unit 126 , The clock generation unit 130 controls the playback rate by inputting a FIFO read clock rate as a variable rate according to one by the output rate control unit 141 certain rate. Here are the first issue buffer unit 116 and the second output buffer unit 126 described as FIFO buffers, but they may be other buffers, such as random access memory (RAM) as long as the output rates of the buffers are variable. The RAM buffer is formed by a dual-port RAM, and the read clock is one from the clock generation unit 130 supplied clock.

The difference amount detection unit 140 detects a difference amount on a time axis between those of the first processing unit 101 output received data and that of the second processing unit 102 output receive data and tells the output rate control unit 141 this difference with.

According to the difference amount detection unit 140 notified difference amount changes the output rate control unit 141 an output rate of at least one of the first processing unit 101 and the second processing unit 102 , For example, the output rate control unit shows 141 the clock generation unit 130 according to the notified difference amount, each of the data output rates, that is, the reproduction rates, for each of the first output buffer unit 116 and the second output buffer unit 126 on. In particular, the output rate control unit has 141 the clock generation unit 130 to change the playback rate for one of them having a playback position in front of the other to a playback rate lower than a predetermined normal output rate.

In a case where the value determined by the difference amount detection unit 140 notified difference amount becomes equal to or less than a predetermined threshold after the output rate of at least one of the first processing unit 101 and the second processing unit 102 has changed, the output rate control unit performs 141 the output rate of the at least one of the first processing unit 101 and the second processing unit 102 to the initial output rate, that is, the predetermined normal output rate.

In accordance with the instruction from the output rate control unit 141 delivers the clock generation unit 130 Clocks to each of the first output buffer unit 116 the first receiving unit 110 and the second output buffer unit 126 the second receiving unit 120 , For example, the clock generation unit generates 130 one of the clock for a normal playback rate, the clock for a low playback rate and the clock for a temporary pause of the playback. The Clock generation unit 130 provides the clock for the normal rate to the receiving unit for which the normal reproduction rate is determined, the rate for the low rate to the receiving unit for which the low reproduction rate is determined, and the clock for the temporary stopping to the reception unit for which the temporary stop is determined.

The receiving state monitoring unit 142 monitors receive states of the first processing unit 101 and the second processing unit 102 , For example, the reception state monitoring unit judges 142 the receiving states of the first receiving unit 110 and the second receiving unit 120 based on reception levels of the first tuner unit 111 and the second tuner unit 121 Frame lock states of the first demodulation unit 112 and the second demodulation unit 122 , Reception states of program-related information or reception states of content interruptions of the first demultiplexing unit 113 and the second demultiplexing unit 123 and monitor states of decode error rates and the like of the first decoder unit 115 and the second decoder unit 125 , and divides the judged reception states of the output switching control unit 143 and the receiving operation command unit 145 With.

In response to the notification from the receiving state monitoring unit 142 has the output switching control unit 143 the output switching unit 144 to switch the output data. The output switching control unit 143 selects from the processing units one in a good reception state. In other words, in a case where the receiving state of the processing unit received from the output switching unit 144 generates output reception data, deteriorates, has the output switching control unit 143 the output switching unit 144 to switch the output to the receive data from the other processing unit.

In response to the instruction from the output switching control unit 143 gives the output switching unit 144 as the output data, the reception data from the processing unit is in a good reception state. The output switching unit 144 Switches the output between the first processing unit 101 output received data and that of the second processing unit 102 output received data.

The receive operation command unit 145 gives instructions about operations to the other processing unit (hereinafter also referred to as background processing unit or background system) that is not the processing unit (hereinafter also referred to as a foreground processing unit or a foreground system) other than the content output device 100 generated receive data generated. For example, the receive operation command unit 145 the background processing unit performs a channel scan in the background (hereinafter also referred to as background scan), and receives and collects a list of broadcast services which have not been collected due to movement. Based on the collected service list, in preparation for the deterioration of the reception state, the reception operation command unit 145 previously, the background processing unit to select a channel of another service that has the same content as that of the content output device 100 is broadcast (e.g., a one-segment service or a full segment service being broadcast in a different layer of the same channel), or another service broadcasting the same content on a different channel, such as the same service provided by a Branch station or a relay station or in a different broadcast standard is provided. The receive operation command unit 145 Also, the background processing unit instructs the background processing unit to receive a streaming content that distributes the same content broadcasted by the broadcast in a similar manner as a radio service distributed through the Internet.

In particular, in a case where the receiving state is from a processing unit that is the output switching unit 144 between the first processing unit 101 and the second processing unit 102 generates, deteriorates, has the receive operation command unit 145 the other processing unit, receive signals of a service corresponding to a service of the output unit 144 received receive data.

In a case where the receiving state of a processing unit other than that of the output switching unit 144 between the first processing unit 101 and the second processing unit 102 generates, deteriorates, indicates when a service corresponding to a service of the output switching unit generates 144 is not detected in the other processing unit, the reception operation command unit 145 the other processing unit to perform a channel scan.

As in 3 (A) is illustrated, the difference amount detection unit 140 , the output rate control unit 141 , the receiving state monitoring unit 142 , the output switching control unit 143 and the reception operation command unit 145 the content output device 100 through a processor 160 can be implemented, such as a central processing unit (CPU), a central processing device, a processing device, an arithmetic logic device, a microprocessor, a microcomputer or a digital signal processor (DSP), the one in a memory 161 stored program, such as a volatile or nonvolatile semiconductor memory, for which a random access memory (RAM), a read-only memory (ROM), a flash memory, an erasable programmable read-only memory (EPROM) or an electrically erasable programmable read-only memory (EEPROM), a magnetic disk, a floppy disk, an optical disk, a compact disc, a minidisk, a Digital Versatile Disc (DVD) or a Bluray disc as examples. The output switching unit 144 can through a switch 162 that by the processor 160 is controlled, implemented.

As in 3 (B) is illustrated, the difference amount detection unit 140 , the output rate control unit 141 , the receiving state monitoring unit 142 , the output switching control unit 143 and the reception operation command unit 145 by a processing circuit 163 be implemented. The processing circuit 163 For example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a combination thereof , The output switching unit 144 can through a switch 162 passing through the processing circuit 163 is controlled, implemented.

In addition, as in 4 Illustrated is the first processing unit 101 and the second processing unit 102 through a tuner 170 , a demodulator 171 , a demultiplexer 172 , a buffer 173 , a decoder 174 , a buffer 175 and a clock generator 176 be implemented.

Each from the first tuner unit 111 and the second tuner unit 121 can through the tuner 170 be implemented. Each of the first demodulation unit 112 and the second demodulation unit 122 can through the demodulator 171 be implemented. Each of the first demultiplexing unit 113 and the second demultiplexing unit 123 can by the demultiplexer 172 be implemented. Each of the first input buffer unit 114 and the second input buffer unit 124 can through the buffer 173 be implemented. Each of the first decoder unit 115 and the second decoder unit 125 can through the decoder 174 be implemented. Each of the first output buffer unit 116 and the second output buffer unit 126 can through the buffer 175 be implemented. The clock generation unit 130 can by the clock generator 176 be implemented.

Next, an operation of the content output device will be described 100 described.

The 5 to 8th Fig. 15 are schematic diagrams for describing operations of the difference amount detection unit 140 ,

Here, the description is made on the assumption that the difference amount acquiring unit 140 the input of first PCM audio data in the first output buffer unit 116 and second PCM audio data in the second output buffer unit 126 receives and performs a cross-correlation process on these data.

5 FIG. 14 shows an example in a case where the shift amount of the second PCM audio data in the second output buffer unit. FIG 126 is equal to zero.

The difference amount detection unit 140 calculates N products of data in such a way that a product of a first item of the first PCM audio data in the first output buffer unit 116 who in 5 (A) and a first item of the second PCM audio data in the second output buffer unit 126 who in 5 (B) illustrated is a product of second objects of the PCM data in the first and second output buffer units 116 and 126 etc. are calculated. As in 5 (C) is illustrated calculates the difference amount detection unit 140 the sum of N products. Here, N is an integer equal to two or greater and is determined beforehand.

6 shows an example in a case where the shift amount of second PCM audio data in the second output buffer unit 126 is one.

As in 6 (B) is illustrated, shifts the difference amount detection unit 140 second audio PCM Data in the second output buffer unit 126 by an amount corresponding to a sample and calculated as in 6 (C) Illustrated is N products and calculates the sum of N products in a similar way as in 5 shown.

7 shows an example in a case where the shift amount of second PCM audio data in the second output buffer unit 126 is equal to two. 8th in an example, in a case where the shift amount of second PCM audio data is in the second output buffer unit 126 is equal to three.

As described above, the difference amount detection unit performs 140 with respect to all items of PCM audio data in the first issue buffer unit 116 performs a similar multiply-accumulate operation and extracts the maximum value of these results. The shift amount at this time is a difference between the data.

Here, the maximum value is used, but the difference amount detection unit 140 can perform the determination by calculating a normalized cross-correlation coefficient. If the cross-correlation coefficient is one, this cross-correlation coefficient indicates that data series are completely coincident with each other. However, if a data error occurs due to a receiving condition or for other reasons, the cross-correlation coefficient is a value near one. Thus, the shift amount obtained when the cross-correlation coefficient reaches or exceeds a predetermined threshold, such as 0.9, can be used as the difference amount. In this case, without performing the multiply-accumulation operation requiring a high computation load with respect to all the data in the buffer, the determination can be made by judging whether the threshold is to be exceeded, and the detection process can be terminated early.

The difference thus obtained becomes the output rate control unit 141 delivered, and the output rate control unit 141 supplies the output buffer unit in a processing unit from the first processing unit 101 and the second processing unit 102 whose reproduction position is in front of the other, an instruction for controlling the reproduction rate so that the content reproduction position coincides with a content reproduction position of the processing unit which is in the data output time. That is, the output rate control unit 141 indicates the clock generation unit 130 to change a content playback rate for a processing unit whose playback position is ahead of the other to a playback rate lower than a normal playback rate. Thereafter, the difference amount detection unit detects 140 in that these content reproduction positions are within an allowable range, and inform the output rate control unit 141 this information with, so the output rate control unit 141 the clock generation unit 130 instructs to return the low playback rate of the output buffer unit in the processing unit to the normal playback rate. In the above manner, the content reproduction position (output position of reception data) from the first processing unit 101 in accordance with the content reproduction position (output position of reception data) from the second processing unit 102 to be brought.

Each of the first output buffer unit 116 and the second output buffer unit 126 Also has the function of storing reception data input at a normal bit rate during low-rate reproduction without omitting the data.

9 Fig. 10 is a flowchart illustrating an operation of the output rate control unit 141 displays.

Here, it is assumed that in an initial state, the reception data from the processing unit 101 through the output switching unit 141 are selected and output to a user. In other words, it is assumed that the first processing unit 101 is the foreground processing unit. It is also assumed that each of the first output buffer unit 116 and the second output buffer unit 126 outputs the reception data at the normal playback rate.

First, acquire the output rate control unit 141 one of the difference amount detection unit 140 the difference ( S10 ).

Next, the output rate control unit determines 141 whether that from the first processing unit 101 as the received data received before the foreground from the second processing unit 102 as received data received from the background system or not (S11). For example, the output rate control unit determines 141 whether the difference amount from that of the first processing unit 101 received data received is greater than a predetermined threshold or not. If the difference amount from that of the first processing unit 101 received received data is greater than the predetermined threshold value (YES in FIG S11 ), the process goes to the step S12 continue while, if the difference amount from that of the first processing unit 101 received data received is less than or equal to the predetermined threshold value (NO in FIG S11 ), the process to the step S13 continues.

In step S12 indicates the output rate control unit 141 the clock generation unit 130 on, the output of the receive data from the first issue buffer unit 116 to change into the low rate. In this case, since the reproduction rate of the foreground system is changed, the rate provided as an instruction is a rate with such a low level that the user can not feel a mismatch. The clock generation unit 130 which has received such an instruction supplies to the first issue buffer unit 116 no normal clock, but a predetermined clock for the low rate. Then the process returns to the step S10 back.

In step S13 determines the output rate control unit 141 whether that from the second processing unit 102 as receive data received from the background system before that from the first processing unit 101 are received data received from the foreground system or not. For example, the output rate control unit determines 141 whether the difference amount of the second processing unit 102 received data received is greater than the predetermined threshold or not. If the difference amount of the second processing unit 102 received received data is greater than the predetermined threshold value (YES in FIG S13 ), the process goes to the step S14 continue while, if the difference amount of the second processing unit 102 received data received is less than or equal to the predetermined threshold value (NO in FIG S13 ), the process to the step S15 continues.

In step S14 indicates the output rate control unit 141 the clock generation unit 130 temporarily outputting the reception data from the second output buffer unit 126 to stop. Here, the reason for the temporary halt instruction instead of the low-rate reproduction is that the reception data from the second processing unit 102 not by the output switching unit 144 are selected and not output to the user. That is, since the processing unit is the background system, even if the playback is temporarily stopped, the user does not feel discomfort. In addition, the temporary pause allows the two content replay positions to be more quickly matched. The clock generation unit 130 , which has received the instruction, delivers to the second issue buffer unit 126 no normal clock, but a clock to interrupt the output. Then the process returns to the step S10 back.

In step S15 determines the output rate control unit 141 whether the output of the received data from the first output buffer unit 116 at a normal rate or not. If the output is not at the normal rate (NO in S15 ), the process goes to the step S16 while if the output is at the normal rate (YES in S15 ), the process to the step S17 continues.

In step S16 indicates the output rate control unit 151 the clock generation unit 130 on, the output of the receive data from the first issue buffer unit 116 to put on the normal rate. The clock generation unit 130 that received the instruction returns the normal clock to the first output buffer unit 116 , Then the process returns to the step S10 back.

In step S17 determines the output rate control unit 141 Whether the output of the receive data from the second output buffer unit 126 at the normal rate or not. If the output is not at the normal rate (NO in S11 ), the process goes to the step S18 while if the output is at the normal rate (YES in S17 ), the process to the step S10 returns.

In step S18 indicates the output rate control unit 141 the clock generation unit 130 on, the output of the receive data from the second output buffer unit 126 to put on the normal rate. The clock generation unit 130 that received the instruction returns the normal clock to the second output buffer unit 126 , Then the process returns to the step S10 back.

In the in 9 displayed flowchart is in step S14 the output from the second output buffer unit 126 temporarily stopped. However, the embodiment is not limited to such an example. For example, it may be any rate as long as the output from the second output buffer unit 126 at a rate lower than the normal rate. Even in such a case, the rate is preferably lower than the low rate in the first output buffer unit 116 for example, the foreground system in step S16 is.

On the basis of through 9 is a procedure in a case where the in S10 difference obtained shows that the output from the first processing unit 101 before the output from the second processing unit 102 (that is, the receive data from the foreground system is ahead of that from the background system).

In step S11 determines the output rate control unit 141 whether the difference amount in the forward side is greater than the threshold value or not. Here is in the step S11 determines that the difference amount in the forward side of the reception data (output content) from the first processing unit 101 greater than the threshold, and the process goes to the step S12 continue.

In step S12 indicates the output rate control unit 141 the clock generation unit 130 on, the output of the reception data (reproduction of content) from the first output buffer unit 116 to put on the low rate.

Consequently, the difference amount detection unit becomes 140 The differential amount gradually decreases and eventually becomes a value equal to or less than the threshold value. At this time, the provision is in step S11 NO, and the process goes to the step S13 continue.

In step S13 is because the output from the second processing unit 102 behind the output from the first processing unit 101 , determines that the difference amount in the forward side is not larger than the threshold value (NO in FIG S13 ), and the process goes to the step S15 continue.

In step S15 determined because the first output buffer unit 116 performs the low-rate reproduction, the output rate control unit 114 NO, and the process goes to the step S16 continue.

In step S16 indicates the output rate control unit 141 the clock generation unit 130 on, the output of the reception data (reproduction of content) from the first output buffer unit 116 to put on the normal rate.

Hereinafter, in contrast to the above-described example, an operation in a case where the output from the second processing unit 102 before the output from the first processing unit 101 (ie, the receive data from the background system is before the receive data from the foreground system).

In step S11 since the reception data (reproduction output) from the first processing unit 101 behind the output from the second processing unit 102 the difference in the forward side is less than the threshold. Therefore, the output rate control unit determines 141 NO, and the process goes to the step S13 continue.

In step S13 determines the output rate control unit 141 Whether the reception data (reproduction output) from the second processing unit 102 is before the threshold or not. If the received data is before the threshold, the output rate control unit determines 141 YES, and the process goes to the step S14 continue.

In step S14 indicates the output rate control unit 141 the clock generation unit 130 temporarily, the output from the second output buffer unit 126 to stop.

As a result of such control, the difference amount detection unit becomes 140 The differential amount gradually decreases and eventually becomes a value equal to or less than the threshold. In this case, the output rate control unit determines 141 in step S11 NO. In step S13 determined as the output from the second processing unit 102 behind the output from the first processing unit 101 is, the output rate control unit 141 in that the difference in the forward side is not greater than the threshold (NO in S13 ), and the process goes to the step S15 continue.

In step S15 goes, since the first output buffer unit 116 playback at the normal rate (YES in S15 ), the process to the step S17 continue.

In step S17 goes, since the second output buffer unit 126 performs the slow rate playback (in temporary stop) (NO in S17 ), the process to the step S18 continue.

In step S18 indicates the output rate control unit 141 the clock generation unit 130 on, the output of the receive data from the second output buffer unit 126 to put on the normal rate.

With reference to the 10 and 11 the above operations are described.

The 10 (A) and 10 (B) illustrate states of from the first output buffer unit 116 and the second output buffer unit 126 in a case where a content reproduction position of the foreground system outputting a received content to a user is in front of a content reproduction position of the background system.

The 11 (A) and 11 (B) illustrate states of from the first output buffer unit 116 and the second output buffer unit 126 output data in a case where the content reproduction position of the background system is before the content reproduction position of the foreground system.

10 (A) illustrates the receive data output from the first output buffer unit 116 , and 10 (B) illustrates the receive data output from the second output buffer unit 126 , As in the 10 (A) and 10 (B) are in the issue time first from the first issue buffer unit 116 output receive data D4 three data before received data D4 same scene from the second output buffer unit 126 , Here is a square of the received data in 10 a data amount that For example, corresponds to a sampling of PCM data.

Next, the issue rate controller indicates 141 the clock generation unit 130 on, a low-rate playback of the first output buffer unit 116 which is ahead in the reproduction. Consequently, as in 10 (A) is illustrated, receive data D8 to D13 coming from the first output buffer unit 116 are output at a rate (played back) that is lower than the normal rate.

As in 10 (B) is illustrated when playback data D13 from the first output buffer unit 116 output, playback data D13 also from the second output buffer unit 126 and the playback positions of these data are coincident with each other. Therefore, the output rate control unit indicates 141 the clock generation unit 130 to cause the first output buffer unit 116 Outputs data at the normal rate.

After that, even if the output switching control unit 143 the output is switched to the background system due to a deterioration of the reception state, the respective reception data does not have a time delay, and thus seamless switching without interruption of reproduction can be achieved.

11 (A) illustrates that from the first output buffer unit 116 output received data, and 11 (B) illustrates that of the second output buffer unit 126 output received data. As in the 11 (A) and 11 (B) is illustrated, are first receive data D4 coming from the second output buffer unit 126 are output in the output time three data before received data D4 the same scene as the first output buffer unit 116 be issued.

Next, the issue rate controller indicates 141 the clock generation unit 130 on, playing the second output buffer unit 126 that is ahead in the play, to pause temporarily. Consequently, as in 11 (B) is illustrated, the output of receive data D7 from the second output buffer unit 126 temporarily stopped.

If the received data D7 from the first output buffer unit 116 are output, the reproduction positions of the reception data output from the individual units coincide with each other. Therefore, the output rate control unit indicates 141 the clock generation unit 130 to cause the second output buffer unit 126 Outputs data at the normal rate.

After that, even if the output switching control unit 143 due to a deterioration of the reception state, the output to the background system switches, the respective reception data no time delay, and thus a seamless switching can be achieved without interrupting the reproduction.

In this way, in the case where the reproduction position of the background system is in front of the reproduction position of the foreground system, by temporarily stopping the reproduction of the background system, these reproduction positions can be made to coincide more quickly. In addition, since only the reproduction rate of the background system is set, the control can be performed without any disagreement to the user during the setting of the reproduction position.

12 Fig. 10 is a flowchart showing the operations of the reception operation command unit 145 and the receiving state monitoring unit 142 displays.

First, the receive operation command unit determines 145 whether background scanning is performed in the background system or not ( S20 ). When the background scan is performed in the background system (YES in FIG S20 ), the process goes to the step S21 while if background scanning is not performed in the background system (NO in FIG S20 ), the process to the step S24 continues.

In step S21 determines the receiving state monitoring unit 142 whether the reception state of the foreground system has deteriorated or not. When it is determined that the reception state of the foreground system has deteriorated (YES in FIG S21 ), the process goes to the step S22 continue.

In step S22 has the receive operation command unit 145 the processing unit 101 or 102 The background system is to stop the background scan.

In addition, the receive operation command unit 145 the processing unit 101 or 102 , which is the background system, to select the same content that is received in the foreground system and to start the decoding. This is to start preparation for a state in which seamless switching is possible in case of further deterioration of the reception state of the foreground system.

If it is determined that the background scan in step S20 not performed (NO in S20 ), the process goes to the step S24 continue. In step S24 determines the receive operation command unit 145 Whether the background system performs background decoding of the same content received in the foreground system or not. When such background decoding is performed (YES in FIG S24 ), the process goes to the step S25 while, if such background decoding is not performed (NO in FIG S24 ), the process to the step S27 continues. Background decoding means decoding in the background.

In step S25 determines the receiving state monitoring unit 142 whether the reception state of the background decoding background system has deteriorated or not. When it is determined that the reception state of the background system has deteriorated (YES in FIG S25 ), the process goes to the step S26 while, if it is determined that the reception state of the background system has not deteriorated (NO in FIG S25 ), the process to the step S20 returns.

In step S26 has the receive operation command unit 145 the processing unit 101 or 102 that is the background system, to stop the background decoding process prepared for seamless switching.

Then, the reception operation command unit determines 145 whether another broadcast service broadcasting the same content exists or not ( S27 ). When it is determined that another broadcast service broadcasting the same content exists (YES in FIG S27 ), the process goes to the step S28 while, if it is determined that there is no other broadcasting service broadcasting the same content (NO in S27 ), the process to the step S29 continues.

In step S28 has the receive operation command unit 145 the processing unit 101 or 102 , which is the background system, to select this service and start the background decoding.

On the other hand, in step S29 the receive operation command unit 145 the processing units 101 and 102 of the background system to start the background scan.

Then the receive operation command unit monitors 145 the in step S29 started background scan until another channel in which the same content is broadcast is detected ( S30 ). If the same content is detected ( S30 ), the process goes to the step S22 continue.

In the manner described above, in the case where the receiving states of the processing unit 101 or 102 triggered by the output switching unit 144 when the foreground system is selected, have deteriorated, the reception operation command unit 145 the processing unit 101 or 102 That is, the background system is to start the output processing of a broadcast service broadcasting the same content, and thus a system load can be reduced as compared with a case where background decoding of the same content is always performed. In addition, the background decoding may be started when necessary, and in a period during which the background decoding is not performed, the background scan may create a service list, and processes such as checking the presence of the same content may be performed. Accordingly, resources of the background system can be used effectively.

In a case where the receiving state of the same content by the processing unit 101 or 102 triggered by the output switching unit 144 When the background system is selected to have deteriorated, if another broadcasting service broadcasting the same content exists, selects the reception operation command unit 145 in the background system. If there is no other broadcast service providing the same content, the receive operation command unit instructs 145 the processing unit 101 or 102 , which is the background system, to perform a channel scan. Therefore, the background scan and the selection of the same content of another channel can be performed, if necessary, and as a result, resources of the background system can be used effectively.

The content output device 100 according to the first embodiment is as in the 1 and 2 illustrated configured, but it is limited to this configuration. For example, the content output device 100 like in the 13 to 15 be configured illustrated.

13 Fig. 16 is a block diagram schematically showing a configuration of a content output device 100 # illustrated according to a variation of the first embodiment.

The content output device 100 # contains a first processing unit 101 # , a second processing unit 102 # a difference amount detection unit 140 , an output rate control unit 141 # , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 and a Reception Operations Command unit 145 , The content output device 100 # after this variation is in one of the content output device 100 according to the first embodiment, with the exception of the first processing unit 101 # , the second processing unit 102 # and the output rate control unit 141 # ,

14 Fig. 12 is a block diagram schematically showing a configuration of the first processing unit 101 # illustrated.

The first processing unit 101 # contains a first tuner unit 111 , a first demodulation unit 112 , a first demultiplexing unit 113 , a first input buffer unit 114 , a first decoder unit 115 , a first output buffer unit 116 , a first system clock counter unit 117 and a first decode start time control unit 118 , The first processing unit 101 # After this variation is in one of the first processing unit 101 according to the first embodiment, with the exception that they are the first system clock counter unit 117 and the first decode start time control unit 118 contains and the clock generation unit 130 does not contain.

15 FIG. 12 is a block diagram schematically showing a configuration of the second processing unit. FIG 102 # illustrated.

The second processing unit 102 # contains a second tuner unit 121 , a second demodulation unit 122 , a second demultiplexing unit 123 , a second input buffer unit 124 , a second decoder unit 125 , a second output buffer unit 126 , a second system clock counter unit 127 and a second decode start time control unit 128 , The second processing unit 102 # After this variation is in a second processing unit 102 configured in a similar manner to the first embodiment, except that it includes the second system clock counter unit 127 and the second decode start time control unit 128 contains and the clock generation unit 130 does not contain.

In the content output device 100 according to the first embodiment, the output rate control unit changes 141 by sending an issue rate command to the clock generation unit 130 indicates a rate at which the receive data from the first processing unit 101 or the second processing unit 102 be issued. In the content output device 100 # after this variation, the output rate control unit changes 141 # by sending an issue rate command to the first decode start time controller 118 or the second decode start time control unit 128 indicates a rate at which the receive data from the first processing unit 101 or the second processing unit 102 be issued. A description thereof will be given below.

A video stream and an audio stream coming into the first decoder unit 115 and the second decoder unit 125 are input, include a decode time stamp (DTS) and a presentation time stamp (PTS), which indicates the time of starting the decoding of received frame data. These timestamps are compared with a system clock (STC) to decode each frame. In this variation, the first decode start time control unit compares 118 and the second decode start time control unit 128 the DTS and PTS with a system clock coming from the first system clock counter unit 117 or the second system clock counter unit 127 is obtained, whereby the first decoder unit 115 or the second decoder unit 125 the time of decoding is communicated.

The first decode start time control unit 118 and the second decode start time control unit 128 The decoding rates in the first decoder unit 115 and the second decoder unit 125 in response to commands from the output rate control unit 141 # to change. For example, the first decoder start time control unit calculates 118 and the second decode start time control unit 128 the value of the system clock according to a rate ratio for low-rate reproduction to perform the low-rate decoding.

For example, assuming that a difference between the value of the previous PTS and the value of the currently received PTS is equal to ΔPTS, the first decode start time control unit decodes 118 and the second decode start time control unit 128 typically the next frame after a lapse of ΔPTS of the STC. On the other hand, in a case where the decoding rate is reduced so that the reproduction is performed at a rate of 90% of the normal rate, the first decode start time control unit is multiplied 118 and the second decode start time control unit 128 the STC with 100/90. In this way, that of the first decoder unit reduces 115 or the second decoder unit 125 performed decoding the output rate of a receive frame.

In this case works while the first decoder unit 115 performs the low-rate playback, the first input buffer unit 114 as a buffer for preventing the omission of data received at the constant normal rate.

In the in 9 illustrated output rate control flowchart is the low rate Output command in step S12 to the first decode start time control unit 118 issued, the temporary stop command in step S14 becomes the second decode start time control unit 128 output, the normal rate output command in step S16 becomes the first decode start time control unit 118 and the normal rate output command in step S18 becomes the second decode start time control unit 128 output.

As in 16 is illustrated, each of the first processing unit 101 # and the second processing unit 102 # after the variation by the tuner 170 , a demodulator 171 , a demultiplexer 172 , a buffer 173 , a decoder 174 , a buffer 175 and a clock counter 177 be implemented.

Each of the first system clock counter unit 117 and the second system clock counter unit 127 can through the clock counter 177 be implemented. Each of the first decode start time control unit 118 and the second decode start time control unit 128 can by a control device 178 be implemented.

As described above, in the content output apparatus 100 according to the first embodiment, the output rate control unit 141 based on the difference amount detection unit 140 detected difference amount, the reproduction rates of each of the first processing unit 101 and the second processing unit 102 to change. Therefore, data output positions of the two systems can be matched in advance before the occurrence of difficulties in a receiving state. Thus, even if the output is switched to the background system immediately after the deterioration of the reception state of the foreground system, the outputs can be seamlessly switched without interruption.

In addition, the output rate control unit refers 141 to a detected difference amount, and when the data output from the foreground system is ahead, slightly reduces the data output rate of the foreground system to a threshold or less. Thus, positions where data is output from the two channels can be matched without causing a user to disagree.

Furthermore, the output rate control unit refers 141 to the detected difference amount, and when the data output from the background system is ahead, temporarily holds the data output from the background system until the difference amount has decreased to a threshold or less. Thus, positions where data from the two
Be issued in a short time, without causing the user to feel a disagreement.

Second embodiment

17 Fig. 16 is a block diagram schematically showing a configuration of a content output device 200 illustrated according to a second embodiment.

The content output device 200 contains a first processing unit 201 , a second processing unit 202 a difference amount detection unit 240 , an output rate control unit 241 , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 , a reception operation command unit 145 and an issue position fine adjustment unit 246 ,

The content output device 200 According to the second embodiment, it is configured in a manner similar to the content output device of the first embodiment except for the first processing unit 201 , the second processing unit 202 , the difference amount detection unit 240 , the output rate control unit 241 and the issue position fine adjustment unit 246 , Thus, hereinafter mainly the first processing unit 201 , the second processing unit 202 , the output rate control unit 241 and the issue position fine adjustment unit 246 described.

A receiving method according to the second embodiment is one of the content output device 200 performed procedure.

The first processing unit 201 contains a first receiving unit 210 and a clock generating unit 130 ,

The second processing unit 202 contains a second receiving unit 220 and the clock generation unit 130 ,

The clock generation unit 130 is configured in a similar manner as that in the first embodiment, and thus only the first receiving unit 210 and the second receiving unit 220 described below.

18 FIG. 12 is a block diagram schematically showing configurations of the first receiving unit. FIG 210 and the second receiving unit 220 illustrated.

The first receiving unit 210 contains a first tuner unit 111 , a first demodulation unit 112 , a first demultiplexing unit 113 , a first input buffer unit 114 , a first decoder unit 115 and a first output buffer unit 216 ,

The first receiving unit 210 according to the second embodiment is similar in a manner to the first receiving unit 110 configured according to the first embodiment except the first issue buffer unit 216 , The first output buffer unit 216 is described below.

The first output buffer unit 216 temporarily stores from the first decoder unit 115 supplied receive data and delivers the receive data to the in 17 illustrated output switching unit 144 , The first output buffer unit 216 provides the receive data based on clock signals from the clock generation unit 130 to the output switching unit 144 , Here causes the content output device 200 according to the second embodiment, that the clock generation unit 130 the clock signals changes, thereby enabling it to rate the received data from the first output buffer unit 216 to the output switching unit 144 to be delivered, change.

In accordance with an instruction from the issue position fine adjustment unit 246 reads the first output buffer unit 216 Data from a read address obtained as the instruction and supplies the data to the output switching unit 144 ,

The second receiving unit 220 receives signals and generates receive data. The second receiving unit 220 contains a second tuner unit 121 , a second demodulation unit 122 , a second demultiplexing unit 123 , a second input buffer unit 124 , a second decoder unit 125 and a second output buffer unit 226 ,

The second receiving unit 220 according to the second embodiment is in a similar manner as the receiving unit 120 configured according to the first embodiment, with the exception of the second output buffer unit 226 , The second output buffer unit 226 works in a similar way as the first output buffer unit 216 ,

The content output device 100 According to the first embodiment, the data output rate of the first processing unit controls 101 or the second processing unit 102 such that output positions of reception data of these processing units coincide with each other. For example, detected in the content output device 100 the difference amount detection unit 140 a difference amount, and the output rate control unit 241 performs a determination of a data output rate and specifies an output rate of a target processing unit for the clock generation unit 130 , In this way, the clock generation unit changes 130 by changing reading clocks supplied to a target processing unit, the output rate of the target processing unit.

In the second embodiment, a case where the series of processes due to overhead requires time and a case where the processing time varies depending on a load of the system are considered. For example, in a case where the first output buffer unit 116 performs a low rate output and the positions of the first output buffer unit and the second output buffer unit 126 output data exactly match each other, the output rate control unit 141 an instruction for outputting data at the normal rate to the first output buffer unit 116 out. However, in a case where the system responsiveness is low or a response time varies, there is a possibility that the positions where the data is output from the buffer units slightly differ from each other when the output rate has returned to the normal rate.

In view of this, in order to avoid such a difference, the content output device includes 200 according to the second embodiment, the issue position fine adjustment unit 246 , A description of this will be given below.

According to 17 detects the difference amount detection unit 240 a difference amount between the first output buffer unit 216 the first processing unit 201 output receive data and from the second output buffer unit 226 the second processing unit 202 and the divided difference amount of the issue position fine adjustment unit 246 With.

The difference amount detection unit 240 Also determines whether receive data is at the same position on the time axis in the first processing unit 201 and the second processing unit 202 be buffered or not. More specifically, it is determined whether the same reception data in the first processing unit 201 and the second processing unit 202 be buffered or not. The difference amount detection unit 240 then supplies the determination result to the output rate control unit 241 ,

On the basis of the supplied determination result, the output rate control unit outputs 241 a data output rate, that is one Playback rate of at least one of the first processing unit 201 and the second processing unit 202 to the clock generation unit 130 , In this way, causes the output rate control unit 241 according to the second embodiment, that the first processing unit 201 and the second processing unit 202 Buffer receive data at the same position on the timeline.

If the output rate control unit 241 a determination result from the difference amount detection unit 240 indicating that the receive data is in the first processing unit 201 and the second processing unit 202 buffered at the same position on the timeline, provides the output rate control unit 241 a rate setting completion notice to the issue position fine setting unit 246 and has the clock generation unit 130 on, the output rates of the first processing unit 201 and the second processing unit 202 due to the predetermined normal output rate.

When the issue position fine adjustment unit 246 the rate setting completion notification from the issue rate control unit 241 receives acquires the issue position fine adjustment unit 246 a difference amount at this time from the difference amount detection unit 240 , Then, the issue position fine adjustment unit determines 246 Read addresses for the first output buffer unit 216 and the second output buffer unit 226 and causes the first issue buffer unit 216 or the second output buffer unit outputs data from a data output address position offset by an amount corresponding to the difference amount, thereby finely adjusting the difference amount. For example, the issue position determines fine adjustment 246 for the background processing unit output buffer unit, a read address offset by an amount corresponding to the acquired difference amount, thereby causing the home processor and the background processing unit output positions to coincide with each other.

The difference amount detection unit 240 , the output rate control unit 241 , the receiving state monitoring unit 142 , the output switching control unit 143 , the receive operation command unit 145 and the issue position fine adjustment unit 246 the above-described content output device 200 can be done by running one in the memory 161 stored program by the processor 160 be implemented as in 3 (A) is illustrated.

The difference amount detection unit 240 , the output rate control unit 241 , the receiving state monitoring unit 241 , the output switching control unit 143 , the receive operation command unit 145 and the issue position fine adjustment unit 246 can through the processing circuit 163 be implemented as in 3 (B) is illustrated.

In addition, as in 4 Illustrated is the first processing unit 201 and the second processing unit 202 also by the tuner 170 , the demodulator 171 , the demultiplexer 172 , the buffer 173 , the decoder 174 , the buffer 175 and the clock generator 176 be implemented.

19 Fig. 10 is a flowchart showing the operations of the difference amount detection unit 240 and the output rate control unit 241 displays.

As a prerequisite, it is assumed that the first processing unit 201 and the second processing unit 202 receive the same content, generate receive data, and output the generated receive data. As an initial state, it is assumed that the same part of data as that of the reception data of a content being reproduced and that in the first output buffer unit 216 is stored, not in the second output buffer unit 226 is stored.

First, the output rate control unit points 241 the clock generation unit 130 to cause the first processing unit 201 Outputs data at the low rate ( S30 ). According to the instruction, the clock generation unit changes 130 a clock frequency at which the first output buffer unit 216 outputs the reception data at the rate slightly lower than a normal rate, so that the output rate of the reception data from the first output buffer unit 216 is lowered.

The difference amount detection unit 240 determines if the first output buffer unit 216 and the second output buffer unit 226 save the same receive data or not ( S31 ). When the same reception data is stored (YES in S31 ), the process goes to the step S32 while if the same receive data is not stored (NO in S31 ), the process to the step S34 continues.

In step S32 indicates the output rate control unit 241 the clock generation unit 130 to cause the first processing unit 201 Outputs data at the normal rate. According to the instruction, the clock generating unit performs 130 the clock frequency for the first output buffer unit 216 back to the normal frequency, so that the output rate of the received data from the first output buffer unit 216 returns to the normal rate.

Then share the output rate control unit 241 the issue position fine adjustment unit 246 the termination of the rate setting with ( S33 ). Accordingly, the issue position fine adjustment unit acquires 246 a difference amount at this time from the difference amount detection unit 240 and causes the output buffer unit of the background system that does not output data to a user at that time to shift the output address position by an amount corresponding to the difference amount for the output of data. In this way, output positions of the reception data from the output buffer units of both processing units can completely coincide with each other.

If, on the other hand, in step S31 both buffers do not store the same receive data (NO in S31 ), the process goes to the step S34 continue. In step S34 performs the difference amount detection unit 240 a time monitoring for a case in which the detection of the same data series is started and no same data series is detected. If a timeout occurs (YES in S34 ), the process goes to the step S35 while if no timeout occurs (NO in S34 ), the process to the step S31 returns.

In step S35 indicates the output rate control unit 241 the clock generation unit 130 to cause the first processing unit 201 Outputs data at the normal rate. According to the instruction, the clock generating unit performs 130 the clock frequency for the first output buffer unit 216 back to the normal frequency.

Then assign the output rate control unit 241 the clock generation unit 130 to cause the second processing unit 202 Output low-rate output data ( S36 ). According to the instruction, the clock generation unit changes 130 a clock frequency at which the second output buffer unit 226 outputs the reception data at a rate slightly lower than the normal rate, so that the output rate of the reception data from the second output buffer unit 226 is lowered.

Thereafter, the difference amount detection unit determines 240 whether the first output buffer unit 216 and the second output buffer unit 226 save the same receive data or not ( S37 ). If both buffers store the same receive data (YES in S37 ), the process goes to the step S38 continue.

In step S38 indicates the output rate control unit 241 the clock generation unit 130 to cause the first processing unit 201 and the second processing unit 202 Output data at the normal rate. According to the instruction, the clock generating unit performs 130 the clock frequencies for the first output buffer unit 216 and the second output buffer unit 226 back to the normal frequency. After that, the process goes to the step S33 Next, and the issue position fine adjustment unit 246 Sets the output position of the received data.

Based on the flowchart of 19 becomes a case in which that of the first processing unit 201 output receive data before that from the second processing unit 202 output received data are described.

In this case, by changing the playback rate, the first processing unit comes 201 on the low rate in step S30 the playback positions of the first processing unit 201 and the second processing unit 202 in terms of time close to each other, and a data series which is the same as a data series of received data in the first output buffer unit 216 , finally appears in the second output buffer unit 226 , In this case, recorded in step S31 the difference amount detection unit 240 the same data in both buffers. For example, the difference amount detection unit performs 240 a displacement calculation as in the 5 to 8th illustrated using all of the first output buffer unit 216 and the second output buffer unit 226 of stored data, and thus it can detect a case where the cross-correlation coefficient is close to one. In this case, in step S31 YES, and in step S32 indicates the output rate control unit 241 the clock generation unit 130 to cause the first processing unit 201 Outputs data at the normal rate ( S32 ). When the cross-correlation coefficient is less than or equal to the predetermined value, the difference amount detection unit may 240 determine that the same data is not stored in both buffers.

Accordingly, the reception data from the first output buffer unit 216 again spent at the normal rate. Thereafter, the reception data from the first output buffer unit 216 and the reception data from the second output buffer unit 226 with a constant difference amount less than a difference amount at the beginning.

Next, in step, share S33 the output rate control unit 241 the issue position fine adjustment unit 246 the completion of the rate setting with. Accordingly, the issue position fine adjustment unit acquires 246 a difference this time from the difference amount detection unit 240 and causes the output buffer unit of the background system, which at this time does not output data to a user, to offset the output address position by an amount corresponding to the difference amount to output data. In this way, output positions of the reception data from the output buffer units of both processing units can completely coincide with each other.

Based on the flowchart of 19 becomes a case in which the first processing unit 201 output received data behind that of the second processing unit 202 output received data are described.

In this case, by changing the reproduction rate of the first processing unit 201 in the low rate in the step S30 the playback positions of the first processing unit 201 and the second processing unit 202 temporally separated. Therefore, in step S31 NO constantly determined, and thus becomes in the step S34 the audit performed the timeout of the capture. In such case, the processes of the steps become S31 and S34 repeatedly until the timeout of the acquisition occurs.

If the timeout of capture in step S34 occurs (YES in S34 ), has the output rate control unit 241 the first processing unit 201 in step S35 to output data at the normal rate. According to the instruction, the playback rate of the output buffer unit is reversed 216 returned contents to the normal rate.

Thereafter, the output rate control unit indicates 241 the second processing unit 202 to spend data at the low rate. According to the instruction, the reproduction rate of the second output buffer unit becomes 226 slightly reduced content output. Then, the difference between the contents of the first processing unit takes 201 and the second processing unit 202 gradually.

Thereafter, the same data series is in the first output buffer unit 216 and the second output buffer unit 226 accumulated. At this time recorded in step S37 the difference amount detection unit 240 the same data series in both buffers (YES in S37 ), and the process goes to the step S38 continue.

In step S38 indicates the output rate control unit 241 the first processing unit 201 and the second processing unit 202 to output data at the normal rate. After that, the process goes to the step S33 Next, and the output rate control unit 241 tells the issue position fine adjustment unit 246 the completion of the rate setting with. Accordingly, the issue position fine adjustment unit acquires 246 a difference amount at this time from the difference amount detection unit 240 and causes the issue buffer unit, which at this time does not output data to a user, to offset the issue address position by an amount corresponding to the difference amount to output data. In this way, output positions of the reception data from the output buffer units of both processing units can completely coincide with each other.

In the in 19 The flowchart shown here will be the instructions for outputting low rate data in steps S30 and S36 but in the case where a control target is the foreground system outputting data to a user, it is controlled to output data at such a low rate that no disagreement is given to the user. In the case where it is the background system that does not output data to the user, the degree of low-rate output can be reduced. In this way, the same data series can be detected in a shorter time, and the time required to adjust the home positions can be shortened.

The content output device 200 according to the second embodiment is as in the 17 and 18 illustrated configured, but it is limited to this configuration. For example, the content output device 200 like in the 20 to 22 be configured illustrated.

20 Fig. 16 is a block diagram schematically showing a configuration of a content output device 200 # illustrated according to a variation of the second embodiment.

The content output device 200 # contains a first processing unit 201 # , a second processing unit 202 # a difference amount detection unit 240 , an output rate control unit 241 # , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 , a reception operation command unit 145 and an issue position fine adjustment unit 246 , The content output device 200 # After this variation is configured in a way similar to the content output device 200 according to the second embodiment, except for the first processing unit 201 # , the second processing unit 202 # and the output rate control unit 241 # ,

21 Fig. 12 is a block diagram schematically showing a configuration of the first processing unit 201 # illustrated.

The first processing unit 201 # contains a first tuner unit 111 , a first demodulation unit 112 , a first demultiplexing unit 113 , a first input buffer unit 114 , a first decoder unit 115 , a first output buffer unit 216 , a first system clock counter unit 117 and a first decode start time control unit 118 , The first processing unit 201 # After this variation is configured in a way similar to that of the first processing unit 201 according to the second embodiment, except that it is the first system clock counter unit 117 and the first decode start time control unit 118 contains and the clock generation unit 130 does not contain.

22 FIG. 12 is a block diagram schematically showing a configuration of the second processing unit. FIG 202 # illustrated.

The second processing unit 202 # contains a second tuner unit 121 , a second demodulation unit 122 , a second demultiplexing unit 123 , a second input buffer unit 124 , a second decoder unit 125 , a second output buffer unit 226 , a second system clock counter unit 127 and a second decode start time control unit 128 , The second processing unit 202 # After this variation is configured in a way similar to that of the second processing unit 202 according to the second embodiment, except that it is the second system clock counter unit 127 and the second decode start time control unit 128 contains and the clock generation unit 130 does not contain.

The first system clock counter unit 117 , the first decode start time control unit 118 , the second system clock counter unit 127 and the second decode start time control unit 128 are the same as those of the content output device 100 # according to the variation of the first embodiment.

While the first decoder unit 115 performs low-rate playback is the first input buffer unit 114 act as a buffer to prevent data of a content received at the constant normal rate from being missed. Similarly, while the second decoder unit 125 performs a low-rate reproduction, the second input buffer unit 124 act as a buffer to prevent data from being received at a constant normal rate.

In this case, in the flowchart of 19 the instruction in the step S32 to cause the first processing unit 201 Output data at the low rate, and the instructions in step S35 and step S38 to cause the first processing unit 202 Outputs data at the normal rate to the first decode start time control unit 118 given. The instruction in the step S36 to cause the second processing unit 202 Outputs data at the low rate, and the instruction in step S38 to cause the second processing unit 202 Output data at the normal rate becomes the second decode start time control unit 128 given.

As described above, in the content output device 200 According to the second embodiment, even if a difference amount between the same contents is large, the same data series (the same scene) are accumulated in the output buffers. In addition, since the issue position fine adjustment unit 246 is provided for finely adjusting the difference amount between the buffers, the difference amount between two contents is reduced to zero, and completely seamless switching can be performed.

In the second embodiment, a first stage process of decreasing the difference amount to a data size of each buffer or less by a rate coarse control with a subsequent time step process of performing a fine adjustment of the issue position by the issue position fine adjustment unit 246 so combined that the difference amount can be reduced to zero even in a case where the same data series can not be included in both output buffers because of a large difference amount.

In addition, even in a case where software intervenes at a time of output rate control and the output positions can not be exactly matched due to the influence of overhead in the software processing only by the rate setting, the difference amount can be also reduced to zero.

Furthermore, the provision of the issue position fine adjustment unit enables 246 to reduce the offset amount to zero even in a case where the output positions are offset from each other by the processing units due to a variation of a software load or the like.

In the above-described second embodiment, the difference amount detection unit determines 240 whether the first output buffer unit 216 and the second output buffer unit 226 store the same receive data or not, but the second embodiment is not on limited to such example. For example, the output rate control unit 241 based on one of the difference amount detection unit 240 Supplied difference amount determine whether the first issue buffer unit 216 and the second output buffer unit 226 store the same receive data or not. More specifically, the output rate control unit 241 can determine that the first output buffer unit 216 and the second output buffer unit 226 store the same receive data when the output rate control unit 241 the difference amount from the difference amount detection unit 240 in other words, when the difference amount detection unit 240 can capture the difference. The output rate control unit 241 can determine that the first output buffer unit 216 and the second output buffer unit 226 store the same receive data when the output rate control unit 241 determines that of the difference amount determination unit 240 supplied difference within the range of capacities of the first output buffer unit 216 and the second output buffer unit 226 is.

Third embodiment

23 Fig. 16 is a block diagram schematically showing a configuration of a content output device 300 illustrated according to a third embodiment.

The content output device 300 contains a first processing unit 101 , a second processing unit 102 a difference amount detection unit 340 , an output rate control unit 341 , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 , a reception operation command unit 145 a difference amount storage unit 347 and a channel selection command unit 348 ,

The content output device 300 according to the third embodiment is configured in a manner similar to that of the content output device 100 according to the first embodiment, except for the difference amount detection unit 340 , the output rate control unit 341 , the difference amount storage unit 347 and the channel selection command unit 348 , Therefore, hereinafter, mainly the difference amount detection unit will become 340 , the output rate control unit 341 , the difference amount storage unit 347 and the channel selection command unit 348 described.

A receiving method according to the third embodiment is one of the content output device 300 performed procedure.

In the content output device 100 According to the first embodiment, when a channel selection operation is performed to switch to a content on a different channel or a different service, the difference amount detection unit needs to 140 In addition, measure the difference between the same content, again from the first processing unit 101 and the second processing unit 102 be received. Thus, it takes time to reduce the difference within a certain range.

The difference amount detection unit 340 performs the same processes as those of the first embodiment and updates the difference amount between corresponding services included in the difference amount storage unit 347 stored each time the difference is detected.

The difference amount storage unit 347 stores a once-detected difference amount between services providing the same content associated with channel selection information such as broadcast channel numbers required for selecting the channels of each service, service information or a URL on the Internet.

The channel selection command unit 348 supplies channel selection instructions to the output rate control unit 341 and either to the first receiving unit 110 or the second receiving unit 120 , For example, the channel select command unit provides 348 the channel selection instructions when a user performs a channel selection operation on an input unit not shown in the drawing. The channel selection instruction becomes one of the first reception unit 110 and the second receiving unit 120 , which serves as the foreground system, delivered.

The output rate control unit 341 performs the same processes as those of the output rate control unit 141 performed by the first embodiment and the processes described below.

If the output rate control unit 341 the channel selection instruction from the channel selection instruction unit 348 receives, scans the output rate control unit 341 the difference amount storage unit 347 to determine whether channel selection information of a newly selected channel already in the difference amount storage unit 347 or not, thereby determining whether channel selection of a stored service is performed or not. When the channel selection of the stored service is performed, the issue rate control unit acquires 341 from the difference amount storage unit 347 the Difference between the same contents that have been saved. Based on the purchased difference, the issue rate control unit provides 341 the instruction for a data output rate for the first processing unit 101 or the second processing unit 102 to the clock generation unit 130 ,

When the clock generation unit 130 having received the instruction, designating the data output rate of the first processing unit 101 receives, controls the clock generation unit 130 a clock frequency for to the first output buffer unit 116 output data and causes the first output buffer unit 116 outputs the receive data at the designated rate. In the same way controls when the clock generation unit 130 the naming of the data output rate of the second processing unit 102 receives, the clock generation unit 130 a clock frequency for the second output buffer unit 126 output data and causes the second output buffer unit 126 outputs the receive data at the designated rate.

Then, in a manner similar to that of the first embodiment, if that of the difference amount detection unit 340 detected difference amount within a permissible range reaches the output rate control unit 341 the clock generation unit 130 on, the data output rate of the first processing unit 101 or the second processing unit 102 attributed to the normal rate.

The content output device 300 according to the third embodiment is as in 23 illustrated configured but not limited to this configuration. For example, the content output device 300 as in 24 be configured illustrated.

24 Fig. 16 is a block diagram schematically showing a configuration of a content output device 300 # illustrated according to a variation of the third embodiment.

The content output device 300 # contains a first processing unit 101 # , a second processing unit 102 # a difference amount detection unit 340 , an output rate control unit 341 # , a reception state monitoring unit 142 , an output switching control unit 143 an output switching unit 144 , a reception operation command unit 145 a difference amount storage unit 347 and a channel selection command unit 348 , The content output device 300 # After this variation is configured in a manner similar to that of the content output device 300 according to the third embodiment, with the exception of the first processing unit 101 # , the second processing unit 102 # and the output rate control unit 341 # ,

The first processing unit 101 # and the second processing unit 102 # according to the variation of the third embodiment are configured in a manner similar to that of the first processing unit 101 # and the second processing unit 102 # after the in 14 and 15 illustrated variation of the first embodiment. The output rate control unit 341 # may be the decoding rate of the first decoder unit 115 or the second decoder unit 125 change by providing instructions to the first decode start time control unit 118 or the second decode start time control unit 128 ,

While the first decoder unit 115 performs low-rate playback is the first input buffer unit 114 acting as a buffer for preventing data from being received at a constant normal rate. Similarly, while the second decoder unit 125 performs a low-rate reproduction, the second input buffer unit 124 acting as a buffer for preventing data from being received at a constant normal rate.

In the in 9 illustrated issue rate control flow becomes the instruction for low rate issue in step S12 to the first decode start time control unit 118 delivered, the instruction for temporarily stopping the output in the step S14 becomes the second decode start time control unit 128 delivered, the instruction to issue at normal rate in the step S16 becomes the first decode start time control unit 118 delivered, and the instruction to issue at normal rate in the step S18 becomes the second decode start time control unit 128 delivered.

As described above, in the content output apparatus 300 according to the third embodiment, the output rate control unit 341 immediately after the channel selection to that in the difference amount storage unit 347 stored difference amount and provides the instruction for an output rate, so that the difference amount between two contents immediately after the channel selection of the same content can be eliminated faster. Accordingly, it is possible to provide more opportunities with which it is possible to seamlessly switch the same content as the reception deteriorates. The difference between broadcasting services is basically constant and does not change frequently, so this configuration works effectively.

In the above-described content output device 100 to 300 according to the first to third embodiments, when receiving a digital television broadcast, a digital broadcast, an FM broadcast, an AM broadcast or a streaming broadcast on the Internet during a movement, a channel selection is made to another service or another channel; that broadcasts the same program, automatically performed when the reception state deteriorates, and contents of the same program can be seamlessly switched without interruption.

In a digital television broadcast, this is effective for switching the same programs between branch stations and relay stations in the ISDB-T standard in Japan and South America. This is also effective for switching between a full-segment broadcast and a one-segment broadcast that deliver the same programs in the same channel. In addition, this is also effective for switching between the same programs in branch stations and relay stations and in the same logical channels in the broadcast standards of DVB-T, DVB-T2 and DVB-H which are mainly used in Europe. This is also effective for switching between the same programs in branch stations and relay stations and in the same logical channels in the broadcast standards DTMB and CMMB used in China. This is also effective for switching between the same programs and relay stations and in the same logical channels in the T-DMB broadcasting standard used in South Korea. This is also effective for switching between the same programs in branch stations and relay stations and in the same logical channels in the ATSC and ATSC-M / H broadcasting standards used in the USA.

This is also effective for switching between the same programs in DVB-T and DVB-T2, between the same programs in DTMB and CMMB and between the same programs in ATSC and ATSC-M / H as well as between the same broadcast standards. This is also effective for switching between the same programs in terrestrial real-time broadcasts and streaming broadcasts distributing the same programs again at the same time, using real-time terrestrial broadcasts and streaming on the Internet.

This is also effective for switching between the same programs in the same broadcasting standards in digital broadcasts in each country, such as ISDB-Tsb, DAB, DRM or HD Radio. It is also effective for switching between the same programs in the same broadcast standards for analog broadcasts of FM broadcasts or AM broadcasts. It is also effective for switching between the same programs in different broadcast standards, such as between DAB and FM or between DAB and AM.

It is also effective for switching between the same programs in mobile digital TV broadcasts and broadcasts, such as between T-DMB and DAB or between FM and AM.

It is also effective for switching between the same programs in broadcasts and streaming broadcasts on the Internet.

A large difference amount generally exists between the same programs that are broadcast in both of the various broadcasting standards or both of the terrestrial broadcasting standard and the streaming broadcasting on the Internet described above, and therefore the configuration works to perform a two-stage setting of the difference amount described in the second embodiment particularly effective.

The first to third embodiments were made using the content output devices 100 to 300 but the invention is not limited to such examples. For example, the invention is applicable to a video display apparatus (television receiving apparatus) by providing a display unit (not shown) for displaying video content based on the output switching unit 144 contains output data. The first to third embodiments are also applicable to an audio output device (radio receiving apparatus) by providing an audio output unit (not shown) for outputting audio content based on the output switching unit 144 contains output data.

LIST OF REFERENCE NUMBERS

100, 100 #, 200, 200 #, 300, 300 # content output device, 101, 101 #, 201, 201 # first processing unit, 102, 102 #, 202, 202 # second processing unit, 110, 210 first receiving unit, 111 first tuner unit, 112 first demodulation unit, 113 first demultiplexing unit, 114 first input buffer unit, 115 first decoder unit, 116, 216 first output buffer unit, 117 first system clock counter unit, 118 first decode start time control unit, 120, 220 second reception unit, 121 second tuner unit, 122 second demodulation unit, 123 second Demultiplexing unit, 124 second input buffer unit, 125 second decoder unit, 126, 226 second output buffer unit, 127 second system clock counter unit, 128 second decode start time control unit, 130 clock generation unit, 140, 240, 340 difference amount detection unit, 141, 141 #, 241, 241 #, 341, 341 # Output Rate Control Unit, 142 Receive State Monitoring Unit, 143 Output Changeover Control Unit, 144 Output Changeover unit, 145 receive operation instruction unit, 246 issue position fine adjustment unit, 347 difference amount storage unit, 348 channel selection instruction unit, 160 processor, 161 memory, 162 switch, 163 processing circuit, 170 tuner, 171 demodulator, 172 demultiplexer, 173 buffer, 174 decoder, 175 Buffer, 176 clock generator, 177 clock counter, 178 control device

Claims (13)

Receiving device (100, 200, 300), comprising: a first processing unit (101, 201) that generates first reception data from a first reception signal to continuously output the first reception data and that is capable of changing an output rate of the first reception data; a second processing unit (102, 202) that generates second reception data from a second reception signal to continuously output the second reception data and that is capable of changing an output rate of the second reception data; an output switching unit that switches the output between the first reception data output from the first processing unit and the second reception data output from the second processing unit; a difference amount detection unit (140, 240, 340) that detects a difference amount on a time axis between the first reception data and the second reception data; and an output rate control unit (141, 241, 341) which, when the difference amount detected by the difference amount detection unit (140, 240, 340) is larger than a predetermined threshold, determines whether or not one-sided data of the first or the second reception data output by the output switching unit (144), and changes paths for delaying the one-sided data according to the result of the determination, wherein the one-sided data are those of the first and the second reception data, which are opposite to the other data from the first reception data and the second reception data Received data are advanced. Reception device (100, 300) after Claim 1 wherein the output rate control unit (141, 341), in the case where the one-sided data is output by the output switching unit (144), causes the first processing unit (101) or the second processing unit (102) to be less than a predetermined normal output rate is. Reception device (100, 300) after Claim 2 in that the output rate control unit (141, 341) instructs the first processing unit (101) or the second processing unit (102) to temporarily stop the output in a case where the one-sided data is not output from the output switching unit. Receiving device (100, 300) according to one of Claims 1 to 3 wherein the output rate control unit (141, 341) causes the output rates of the first processing unit (101) and the second processing unit (102) to be the predetermined normal output rate in a case where the difference amount detection unit (140, 340) is less than or equal to the predetermined threshold. Reception device (100, 300) after Claim 1 wherein the first processing unit (101) includes a first output buffer unit (116) that temporarily stores the first receive data, the second processing unit (102) includes a second output buffer unit (126) that temporarily stores the second receive data, and the output rate control unit (141, 341) changes the output rates of the first processing unit (101) and the second processing unit (102) by changing readout rates of the first output buffer unit (116) and the second output buffer unit (126). Receiving device (200) after Claim 1 comprising: an output position fine adjusting unit (246) that fine tunes the difference amount detected by the difference amount detection unit (240), the first processing unit (201) including a first output buffer unit (216) temporarily storing the first reception data second processing unit (202) does not temporarily include a second output buffer unit (226) temporarily storing the second reception data in a case where data having an identical position on the time axis in the first reception data and in the second reception data is not temporarily stored the first Output buffer unit (216) and the second output buffer unit (226), the output rate control unit (241) changes at least one of the readout rates from the first output buffer unit and the second output buffer unit, thereby causing the data to be an identical position on the time axis in the first receive data and the second receive data, are temporarily accumulated in the first output buffer unit (216) and the second output buffer unit (226), and in a case where the data is then an identical position on the time axis in the first receive data and the second receive data are temporarily stored in the first issue buffer unit (216) and the second issue buffer unit (226), the issue position fine adjustment unit (246) causes the first issue buffer unit (216) or the second issue buffer unit (226) to receive the first receive data and the second receive data from readout which is offset by an amount corresponding to the difference amount detected by the difference amount detection unit. Receiving device (200) after Claim 6 in which, in a case where the data which then occupies an identical position on the time axis in the first reception data and the second reception data are temporarily stored in the first output buffer unit (216) and the second output buffer unit (226), the output rates Control unit (241) causes the output rates of the first processing unit (201) and the second processing unit (202) to be the predetermined normal output rate. Receiving device (200) after Claim 6 , further comprising a clock generation unit (130) that changes rates of read-out clocks for the first output buffer unit (216) and the second output buffer unit (226) in accordance with an instruction from the output rate control unit (241). Reception device (300) after Claim 1 or 2 further comprising: a difference amount storage unit (347) that stores the difference amount detected by the difference amount detection unit (340); and a channel selection command unit (348) that instructs the output rate control unit (341) to select a channel of a service, in a case where a difference amount of the service in the channel selected on the instruction of the channel selection command unit (348) is stored in the difference amount storage unit (347), the issue rate control unit (341) changes the issue rate of the first processing unit (101) or the second processing unit (102) according to the difference amount stored in the difference amount storage unit (347). Reception device (100, 200, 300) after Claim 1 or 6 further comprising: a reception operation command unit (145) that instructs the other processing unit in a case where a reception state in a processing unit of the first processing unit (101, 201) and the second processing unit (102, 202) deteriorates receive a reception signal of a service corresponding to a service of reception data output from the output switching unit (144), the one processing unit generating the reception data output from the output switching unit (144). Reception device (100, 200, 300) after Claim 1 or 6 further comprising: a reception operation command unit (145) that deteriorates in a case where a reception state in the one processing unit of the first processing unit (101, 201) and the second processing unit (102, 202) deteriorates, and in one Case in which a service corresponding to a service of reception data output from the output switching unit (144) is not detected in the other processing unit instructing the other processing unit to perform a channel scan, the one processing unit outputting the output from the output switching unit (144) Received data generated. Reception device (100, 200, 300) after Claim 1 or 6 further comprising: an output switching control unit (143) which, in a case where a receiving state in the one processing unit of the first processing unit (101, 201) and the second processing unit (102, 202) is deteriorated, the output switching unit (14) 144) instructs to switch the output to the other processing unit, wherein the one processing unit generates output receive data from the output switching unit (144). A reception method comprising: generating first reception data from a first reception signal to continuously output the first reception data; Generating second reception data from a second reception signal to continuously output the second reception data; Switching the output between the output of the first reception data and the output of the second reception data; Detecting a difference amount on a time axis between the output of the first reception data and the output of the second reception data; Determining, when the difference amount detected by the difference amount detection unit (140, 240, 340) is greater than a predetermined threshold, whether or not unilateral data of the first or second reception data is output by the output switching unit (144), the one-sided data being that Are data of the first and the second reception data which have progressed from the other data from the first reception data and the second reception data, and Changing ways of delaying the one-sided data according to the result of the determination.

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