WO2013124900A1 - Transmitter apparatus, receiver apparatus, and transmission/reception method - Google Patents

Abstract

The conventional art discloses that the transmitting side transmits various kinds of information on a segment-by-segment basis and the receiving side selects and demodulates any one of the segments. However, the conventional art does not disclose anything about inter-segment information association in which the transmitting side associates and transmits various kinds of information on a multiple-segments-by-multiple-segments basis and the receiver side selects and demodulates segments in accordance with the association. Moreover, the conventional art does not refer to achievement of a service effectively using metadata in a system for performing a content distribution preconditioned on the information association. A transmitter apparatus for transmitting contents and the metadata of those contents comprises a transmission unit for transmitting the contents and the metadata of those contents, and is characterized in that the metadata to be transmitted from the transmission unit includes a plurality of pieces of program content information that are in accordance with reproduction elapsed-times of the contents to be transmitted from the transmission unit.

Description

Transmission device, reception device, and transmission / reception method

The present invention relates to digital broadcasting transmission technology and reception technology for transmitting digital information such as video, audio and data.

Conventionally, as shown in Patent Document 1, when transmitting various pieces of information in segment units, a plurality of segments are processed and transmitted at the same time, and the receiver side selects an arbitrary segment from the received signal. It was possible to select and demodulate.

JP 2000-216748 A

In the above-mentioned patent document 1, it is disclosed that various information is transmitted in units of segments on the transmission side, and an arbitrary segment is selected and demodulated from among them on the reception side.

However, there is no information regarding the information association between segments, in which various information in a plurality of segment units are transmitted in association with each other and the segment is selected and demodulated in accordance with the relationship. No mention was made of the feasibility of a service that effectively uses metadata in a pre-requisite content distribution system.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. For example, a transmission device that transmits content and metadata of the content includes a transmission unit that transmits the content and metadata of the content. The metadata transmitted from the transmission unit includes a plurality of pieces of program content information corresponding to the elapsed playback time of the content transmitted from the transmission unit.

According to the above means, it is possible to realize a service that effectively uses metadata.

It is a block diagram which shows the structure of the digital broadcast transmission / reception system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the digital broadcast transmitter which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the multimedia signal generation which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is a block diagram which shows the structure of the modulation | alteration / encoding part 212,222 which is the main blocks of this invention. It is a block diagram which shows the structure of the frame structure parts 214 and 224 which are the main blocks of this invention. It is explanatory drawing of the frame structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows the TMCC signal comprised by the TMCC signal structure part 603 which is the main blocks of this invention. It is explanatory drawing which shows one Example of the service structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is a block diagram which shows the structure of the digital broadcast receiver which concerns on the 2nd Embodiment of this invention. It is explanatory drawing of the digital broadcast transmission signal which the digital broadcast receiver of this invention receives. It is a block diagram which shows the structure of the demodulation decoding part 1905 which is the main blocks of this invention. It is a block diagram which shows the other structure of the demodulation decoding part 1905 which is the main blocks of this invention. It is a flowchart which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows one Example of the service structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus which concerns on the 3rd Embodiment of this invention transmits. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is a flowchart which shows the reception operation | movement of the digital broadcast receiver which concerns on the 4th Embodiment of this invention. It is explanatory drawing which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows one Example of the service structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus concerning the 5th Embodiment of this invention transmits. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is a flowchart which shows the reception operation | movement of the digital broadcast receiver which concerns on the 6th Embodiment of this invention. It is explanatory drawing which shows the reception operation | movement of the digital broadcast receiver of this invention. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus concerning the 7th Embodiment of this invention transmits. It is a flowchart which shows the reception operation | movement of the digital broadcast receiver which concerns on the 8th Embodiment of this invention. It is explanatory drawing which shows one Example of the segment structure of the digital broadcast transmission signal which an engaging digital broadcast transmission apparatus transmits to the 9th Embodiment of this invention. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows one Example of the pilot information of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is explanatory drawing which shows another Example of the segment structure of the digital broadcast transmission signal which the digital broadcast transmission apparatus of this invention transmits. It is a block diagram which shows an example of the structure of the multimedia signal generation which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the reception operation | movement of the digital broadcast receiver of this invention. It is a flowchart of another example which shows the reception operation | movement of the digital broadcast receiver of this invention. 6 is an example of a processing flow until broadcast content is placed on a broadcast TS in the transmission operation of the digital broadcast transmission apparatus of the present invention. 6 is an example of a processing flow until a broadcast content is extracted from a broadcast TS in the reception operation of the digital broadcast reception apparatus of the present invention. It is an example of the processing flow in which the program content information classified by reproduction elapsed time is filed as contents in the transmission operation of the digital broadcast transmitting apparatus of the present invention. It is an example of the internal component of the program content information according to reproduction elapsed time transmitted in the transmission operation of the digital broadcast transmission apparatus of the present invention. It is an example of the internal component of the program content information according to reproduction elapsed time transmitted in the transmission operation of the digital broadcast transmission apparatus of the present invention. It is an example of the processing flow which presents the program content information according to reproduction elapsed time according to reproduction elapsed time in the reception reproduction operation of the digital broadcast receiving apparatus of the present invention. In the reception and reproduction operation of the digital broadcast receiving apparatus of the present invention, it is an example of a metadata description method using program content information according to reproduction elapsed time as a constituent element. It is an example of the program content information according to the elapsed playback time presented when the content to be played back is selected in the receiving and playing operation of the digital broadcast receiving apparatus of the present invention. It is an example of the program content information according to reproduction elapsed time presented after selecting the content to reproduce in the reception reproduction operation of the digital broadcast receiving apparatus of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. Further, the present invention is not limited to the illustrated example.

FIG. 1 is a block diagram showing a system configuration of digital broadcast distribution in Embodiment 1 according to the present invention. 101 is a content transmission device, 102 is a data transmission device for loss compensation, 103 is a license management device, 104 is a payment system / customer management system, 105 is a removable medium, 106 is a reception device, 107 is a storage device, and 108 is metadata transmission Device.

Content to be distributed and metadata storing information related to the content are stored in the storage device 107 and registered in the content transmission device 101 for distribution. The registered content and metadata are transmitted from the content transmitting apparatus 101 via broadcast waves together with access control common information and access control individual information. The metadata may be transmitted from the metadata transmission apparatus 108 via communication as well as via broadcast waves.

Information relating to whether or not viewing is possible is managed by the license management apparatus 103 and the settlement system / customer management system 104, and access control common information and access control individual information are supplied to the content transmission apparatus 101. The access control common information and the access control individual information may be distributed not only from the content transmission apparatus 101 via broadcast waves but also from the license management apparatus 103 via communication. In the content transmission apparatus 101, the access control common information and the access control individual information may be stored in the removable medium 105 and delivered directly to the user or sold through a store.

The deficiency complementing data sending device 102 has a function of sending data for repairing a deficiency when there is a deficiency in the content distributed by the broadcast wave when the receiving device 106 receives the content. The missing complement data sending device 102 sends the missing complement data via communication in accordance with the missing complement data request from the receiving device 106. After the reception of the missing complement data is completed, the receiving device 106 transmits a reception report to the missing complement data sending device.

In FIG. 1, the content transmission device 101, the defect complement data transmission device 102, the license management device 103, the payment system / customer management system 104, the storage device 107, and the metadata transmission device 108 are all described as separate devices. There may be a device having a plurality of functions, and the present invention is not limited to the configuration of FIG.

In the digital broadcast according to the present invention, real-time broadcast and push cast broadcast are distributed. Real-time broadcasting is a streaming-type distribution, and is a service for reproducing the content at the same time as receiving a broadcast wave. On the other hand, pushcast broadcasting is download-type distribution and is a service that is played back at an arbitrary timing after receiving a broadcast wave.

In the case of real-time broadcasting, the content transmission apparatus 101 transmits all content, metadata, access control common information, and access control individual information via broadcast waves. The content transmission apparatus 101 acquires the access control common information and the access control individual information from the license management apparatus 103 in advance in order to transmit the access control common information and the access control individual information. The receiving apparatus 106 separates / extracts content, metadata, access control common information, and access control individual information from the broadcast wave, and decodes the content using the acquired access control common information and access control individual information.

Note that the access control individual information does not necessarily need to be transmitted in the case of free broadcasting.

Further, the access control individual information may be distributed from the license management apparatus 103 via the network or the removable media 105 from the viewpoint of effective use of the broadcast band. In this case, the receiving apparatus 106 needs to obtain the access control individual information in advance before receiving the content.

In the case of pushcast broadcasting, the content sending apparatus 101 sends all content, metadata, access control common information, and access control individual information via broadcast waves. The content transmission apparatus 101 acquires the access control common information and the access control individual information from the license management apparatus 103 in advance in order to transmit the access control common information and the access control individual information. The receiving apparatus 106 separates / extracts content, metadata, access control common information, and access control individual information from the broadcast wave, and decodes the content using the acquired access control common information and access control individual information.

Note that the access control individual information does not necessarily need to be transmitted in the case of free broadcasting.

Also, in the case of pushcast broadcasting, there is a time lag between the reception and playback of content, so it is not necessary to send metadata, access control common information, and access control individual information together with content via broadcast waves. Absent. The metadata may be distributed from the metadata transmission device 108 via a network. The access control common information and the access control individual information may be distributed from the license management apparatus 103 via a network or via the removable medium 105. The receiving device 106 needs to obtain the access control individual information via the network or the removable medium 105 by the time of content reproduction.

In addition, since there is a time gap between the reception and reproduction of content, the content transmission apparatus 101 may repeatedly transmit specific content multiple times in a certain time zone.

Furthermore, when the content received by the receiving device 106 via the broadcast wave is defective, the content stored in the receiving device 106 may be repaired by sending data for defect complementation. If the receiving device 106 determines that the accumulated content is missing, the receiving device 106 transmits a missing complement data request to the missing complement data sending device 102 via the network. In response to the missing complement data request, the missing complement data sending device 102 sends the missing complement data to the receiving device 106 via the network. The receiving device 106 receives the missing complement data and attempts to repair the accumulated content, and transmits a reception report to the missing complement data sending device 102 via the network.

FIG. 2 is a block diagram showing a detailed configuration inside the content transmission apparatus 101. In this digital broadcasting system, a plurality of MPEG-2 transport streams (hereinafter referred to as TS) are each subjected to transmission path coding processing, and then subjected to a plurality of IFFTs (Inverse / Fast / Fourier / Transform). It is converted into an OFDM (Orthogonal Frequency Division Multiplexing) transmission signal consisting of subcarriers in a batch and transmitted as a broadcast wave.

FIG. 3 is a block diagram showing a detailed configuration inside the multimedia signal generation 201. 301 is a content / metadata registration function, 302 is a metadata generation function, 303 is a metadata storage function, 304 is a content storage / playback function, 305 is a content encryption function, and 306 is a recording medium.

The content and metadata supplied from the outside of the content transmission apparatus 101 are registered by the content / metadata registration function 301. The registered content and metadata are stored in the recording medium 306 by the content storage / playback function 304 and the metadata storage function 303, respectively. Metadata relating to content transmission and license is generated by the metadata generation function 302 and stored in the recording medium 306 by the metadata storage function 303. The stored content and metadata are encrypted by the content encryption function 305 and output as a stream.

FIG. 4 shows an example of the segment structure of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention. First, FIG. 4 will be described.

This digital broadcast transmission signal is based on the segment-coupled transmission method among terrestrial multimedia broadcasts performed by broadcast stations using radio waves (VHF-High band) with a frequency of 207.5 MHz to 222 MHz. This is based on the transmission system of terrestrial digital television broadcasting and the transmission system of terrestrial digital audio broadcasting.

The OFDM segment of the digital broadcast transmission signal is
(1) OFDM segment in 13 segment format (type A super segment) compliant with digital terrestrial television broadcasting transmission system
(2) Concatenation of 14 or fewer OFDM segments in one segment format conforming to the transmission system of digital terrestrial audio broadcasting (Type B super segment)
Are connected (hereinafter referred to as a connected OFDM segment). Here, one segment has a bandwidth obtained by dividing the channel bandwidth 6 MHz of terrestrial television broadcasting into 14 equal parts. A concatenated OFDM segment always includes one or more type A super segments.

Assuming a physical channel of 6 MHz width in the frequency band to which digital broadcasting is allocated, as with terrestrial television broadcasting. At this time, the transmission spectrum of each super segment is arranged in any one physical channel. Note that the frequency position of the physical channel may be defined by overlapping some bands. In this case, the frequency bandwidth of the overlapping portion is an integral multiple of 6/14 MHz.

Also, sub-channels are defined as shown in FIG. 5 for the frequencies in the physical channel. The sub-channel is a virtual channel with a bandwidth of 1/7 MHz, and the physical channel bandwidth of 6 MHz is numbered from 0 to 41 for each tuning step 1/7 MHz.

Figure 5 shows an example of the relationship between subchannel numbers and segments. FIG. 5 shows an example of one segment of the center subchannel number 22. The subchannels 21, 22, and 23 constitute one segment. In one segment format, subchannel numbers 0, 1, and 41 are arranged across physical channels. In the case of the 13 segment format, it can be represented by the center subchannel number of the center segment (segment number # 0) of the 13 segments.

When the allocated frequency bandwidth is 14.5 MHz, the maximum number of connected OFDM segments is 33. In this case, the physical channel shown in FIG. 4 and super segment arrangement are conceivable.

In FIG. 4 (a), "Physical channel start frequency to physical channel end frequency"
Physical channel 1: 204-210MHz
Physical channel 2: 210-216MHz
Physical channel 3: 216 to 222 MHz
And
Super segment 1:
Type B (5 pieces per segment)
Physical channel 1
Center subchannel number {28, 31, 34, 37, 40} (range [27-41])
Super segment 2:
Type B (1 segment 1 piece)
Physical channel 2
Center subchannel number {1} (range [0-2])
Super segment 3:
Type A (13 segments, 1 piece)
Physical channel 2
Center subchannel number {22} (range [3-41])
Super segment 4:
Type B (1 segment 1 piece)
Physical channel 3
Center subchannel number {1} (range [0-2])
Super segment 5:
Type A (13 segments, 1 piece)
Physical channel 3
Center subchannel number {22} (range [3-41])
It becomes. At this time,
The center frequency that is the channel selection frequency for Super Segment 1 and center subchannel number 28 is 208 MHz.
The center frequency that is the channel selection frequency of super segment 1 and center subchannel number 31 is (208 + 3/7) MHz.
The center frequency that is the tuning frequency of super segment 1 and center subchannel number 34 is (208 + 6/7) MHz,
The center frequency, which is the channel selection frequency for super segment 1 and center subchannel number 37, is (209 + 2/7) MHz.
The center frequency that is the channel selection frequency of Super Segment 1 and center subchannel number 40 is (209 + 5/7) MHz.
The center frequency, which is the channel selection frequency of super segment 2 and center subchannel number 1, is (210 + 1/7) MHz,
The center frequency that is the channel selection frequency of super segment 3 and center subchannel number 22 is (213 + 1/7) MHz,
The center frequency, which is the channel selection frequency of super segment 4 and center subchannel number 1, is (216 + 1/7) MHz,
The center frequency, which is the channel selection frequency for super segment 5 and center subchannel number 22, is (219 + 1/7) MHz.
It becomes. That is,
[Formula 1]: Channel selection frequency =
(Start frequency of physical channel where super segment is arranged + center subchannel number x 1/7) MHz
It is.

In FIG. 4B,
Physical channel 1: 204+ (8 × 6/14) to 210+ (8 × 6/14) MHz
Physical channel 2: 210+ (8 × 6/14) to 216+ (8 × 6/14) MHz
Physical channel 3: 216 to 222 MHz
And
Super segment 1:
Type A (13 segments, 1 piece)
Physical channel 1
Center subchannel number {22} (range [3-41])
Super segment 2:
Type B (7 segments)
Physical channel 2
Center subchannel number {1, 4, 7, 10, 13, 16, 19} (range [0-20])
Super segment 3:
Type A (13 segments, 1 piece)
Physical channel 3
Center subchannel number {22} (range [3-41])
It becomes. At this time,
The center frequency, which is the channel selection frequency for super segment 1 and center subchannel number 22, is (210 + 4/7) MHz.
The center frequency, which is the channel selection frequency of super segment 2 and center subchannel number 1, is (213 + 4/7) MHz.
The center frequency, which is the tuning frequency of super segment 2 and center subchannel number 4, is 214 MHz.
The center frequency, which is the channel selection frequency for super segment 2 and center subchannel number 7, is (214 + 3/7) MHz.
The center frequency that is the channel selection frequency for super segment 2 and center subchannel number 10 is (214 + 6/7) MHz.
The center frequency, which is the channel selection frequency of super segment 2 and center subchannel number 13, is (215 + 2/7) MHz.
The center frequency, which is the channel selection frequency of super segment 2 and center subchannel number 16, is (215 + 5/7) MHz.
The center frequency that is the channel selection frequency of super segment 2 and center subchannel number 19 is (216 + 1/7) MHz,
The center frequency that is the channel selection frequency of super segment 3 and center subchannel number 22 is (219 + 1/7) MHz,
It becomes.

In the example of FIG. 4 (a), the current VHF physical channels 10, 11, and 12 are used, and therefore, there is an effect that the channel selection unit of the current television receiver is good. In the example of FIG. 4B, since the 13-segment format is arranged at both ends of the allocated band, there is an effect that it is difficult to receive interference because of the frequency interleaving effect even if it receives interference from outside the allocated band.

Next, the operation of the digital broadcast transmission apparatus in FIG. 2 will be described.

201 is a multimedia signal generation unit, 202 is a 13 segment format encoding unit, 203 is a 3 segment format encoding unit, 204 is a concatenated frame configuration unit, 205 is a reconnection frame configuration unit, and 206 is an inverse fast Fourier transform (hereinafter, IFFT) / guard interval adding unit, 207 is an up-converter unit, 208 is a transmission amplifier unit, and 209 is an antenna.

Also, 211 is an RS (Reed-Solomon) encoding unit, 215 is a layer division unit, 212 is a modulation / coding unit, 216 is a layer synthesis unit, 213 is an interleaving unit, and 214 is a frame configuration unit. A segment format encoding unit 202 is configured. The modulation / coding unit 212 includes three systems, a, b, and c.

Furthermore, 221 is an RS (Reed-Solomon) encoding unit, 222 is a modulation / coding unit, 223 is an interleaving unit, 224 is a frame configuration unit, and these constitute a one-segment format encoding unit 203.

In the digital broadcast transmission apparatus of FIG. 2, the 13-segment format encoding unit 202 has two systems a and b, the 1-segment format encoding unit 203 has seven systems a, b, c, d, e, f, and g. 33 segments (13 × 2 + 7) are connected OFDM segments.

FIG. 6 shows a detailed configuration of the modulation / coding units 212 and 222.

601 is an input from the previous stage, 602 is an energy spreading unit, 603 is a delay correction unit, 604 is a byte interleaving unit, 605 is a convolutional coding unit, 606 is a carrier modulation unit, 607 is a bit interleaving unit, 608 is a mapping unit, 609 Is an output, and the carrier modulation unit 606 is composed of a bit interleaving unit 607 and a mapping unit 608.

FIG. 7 shows a detailed configuration of the frame configuration units 214 and 224.

701 is an input from the previous stage, 702 is a pilot signal configuration unit, 703 is a TMCC (Transmission and Multiplexing Configuration and Control) signal configuration unit, 704 is an AC (Auxiliary Channel) signal configuration unit, 705 is an OFDM frame configuration unit, and 706 is an output is there.

In the multimedia signal generation unit 201, the video signal, the audio signal, and the data are each encoded, and a TS to be output to each 13 segment format encoding unit 202 or 1 segment format encoding unit 203 is generated.

First, the operation of the 13 segment format encoding unit 202 will be described.

Each TS is converted into a burst signal format of 188 bytes by a clock four times the IFFT sample clock, and a Reed-Solomon outer code is added by the RS encoder 211. Thereafter, when hierarchical transmission is performed, the hierarchical division unit 215 performs hierarchical division in accordance with the designation of the hierarchical information, and inputs the signals to a maximum of three systems of modulation / coding units 212a, b, and c (input 601 in FIG. 6). ). The modulation / coding units 212a, 212b, and 212c will be described with reference to FIG. 6. Signals input from the input 601 are respectively energy spread by the energy spread unit 602, byte interleave by the byte interleave unit 604, and convolutional code. Then, convolutional coding by the conversion unit 605, bit interleaving by the bit interleaving unit 607, and mapping by the mapping unit 608 are performed, carrier modulation is performed as the carrier modulation unit 606, and output from the output 609. In addition, the delay correction unit 603 performs delay correction on the delay time difference between hierarchies caused by the time axis operation of byte interleaving and bit interleaving in advance to adjust the timing. The coding rate of the convolutional code, the interleave length, and the carrier modulation scheme are set independently in each layer. After parallel processing in the modulation / coding units 212a, 212b, and 212c, the signal layered by the layer combining unit 216 is effective for error correction coding against electric field fluctuations and multipath interference in mobile reception. Is input to the interleaving unit 213 in order to exhibit the above. The interleaving unit 213 performs time interleaving and frequency interleaving. The time interleaving method is convolutional interleaving in order to shorten the combined delay time and suppress the memory capacity of the receiver. Further, frequency interleaving is configured by combining inter-segment and inter-segment interleaving so that a sufficient interleaving effect can be exhibited while ensuring a segment structure.

The output of the interleave unit 213 is input to the frame configuration unit 214 (input 701 in FIG. 7). The operation of the frame configuration unit 214 will be described with reference to FIG.

Demodulation of the receiver, such as system identification, transmission parameter switching index, emergency warning broadcast start flag, transmission parameters of each layer, etc., to assist receiver demodulation / decoding for mixed transmission parameters A TMCC (Transmission-and-Multiplexing-Configuration-Control) signal is transmitted using a specific carrier as control information for smoothly performing the operation. Further, in order to transmit additional information related to broadcasting, an AC (Auxiliary Channel) signal, which is an extension signal for transmitting additional information related to transmission control of modulated waves assigned to a specific carrier and earthquake motion warning information, is used.

In OFDM frame configuration section 705, OFDM is obtained by information data from interleave section 213, pilot signal for synchronous reproduction from pilot signal configuration section 702, TMCC signal from TMCC configuration section 703, and AC signal from AC signal configuration section 704. A frame is constructed and output from output 706. This frame configuration is shown in FIG.

Si, j represents the carrier symbol in the data segment after interleaving. SP (Scattered Pilot) is a reference pilot symbol for the receiver to perform quasi-synchronous detection. As shown in FIG. 8, it is inserted once in 12 carriers in the carrier direction and once in 4 symbols in the symbol direction. If SP is interpolated in the symbol direction on the receiving side, SP of 3 (12/4) carrier interval can be obtained. Since the maximum value of the guard interval length is 1/4 of the effective symbol length, multipath up to the maximum delay time that does not cause intersymbol interference is achieved by interpolation processing (transmission path characteristics estimation) by SP of 3 carrier intervals. Is possible. When the guard interval ratio is 1/4, an SP of 4 carrier intervals may be used in principle, but it is inserted once in 4 symbols in the symbol direction in consideration of the characteristics of the interpolation filter.

The example in FIG. 8 is mode 1, but the carrier number in mode 1 is 0 to 107, whereas in mode 2 and mode 3, it is 0 to 215 and 0 to 431, respectively.

The AC signal is arranged as shown in FIG. 8 and has a data amount of 204 bits per carrier. In addition, two AC signals are arranged in each segment in mode 1, four in mode 2, and eight in mode 3.

TMCC signals are arranged as shown in FIG. 8 and have a data amount of 204 bits per carrier. Further, one TMCC signal is arranged in each segment in mode 1, two in mode 2, and four in mode 3.

All signals that have completed the frame configuration are output from the output 706 and input to the reconnection frame configuration unit 205. In the embodiment of FIG. 2, there are two 13-segment format encoding units 202a and 202b, which are input to the reconnection frame configuration unit 205, respectively.

Next, the operation of the one segment format encoding unit 203 will be described.

Each TS is converted into a burst signal format of 188 bytes by a clock four times the IFFT sample clock, and a Reed-Solomon outer code is added by the RS encoder 221. Thereafter, the signal is input to the modulation / coding unit 222 (input 601 in FIG. 6). The operation of the modulation / coding unit 222 is as described with reference to FIG. 6 in the case of the 13 segment format coding unit 202. The code rate, interleave length, and carrier modulation scheme of the set convolutional code are used. After the processing in the modulation / coding unit 222, the signal is input to the interleaving unit 223 in order to effectively exhibit the error correction coding capability against electric field fluctuation and multipath interference in mobile reception. Interleaving section 223 performs time interleaving and frequency interleaving. The time interleaving method is convolutional interleaving in order to shorten the combined delay time and suppress the memory capacity of the receiver. Further, frequency interleaving is configured by combining inter-segment and inter-segment interleaving so that a sufficient interleaving effect can be exhibited while ensuring a segment structure.

The output of the interleave unit 223 is input to the frame configuration unit 224 (input 701 in FIG. 7). The operation of the frame configuration unit 224 is as described with reference to FIG. 7 in the case of the 13 segment format encoding unit 202.

全 All signals that have completed the frame configuration are input to the concatenated frame configuration unit 204. In the embodiment of FIG. 2, there are seven 1-segment format encoding units 203a, b, c, d, e, f, and g, which are input to the concatenated frame configuration unit 204, respectively.

Here, in contrast to the segment configuration of FIG.
In FIG. 4A, for example,
Super segment 1: Each segment of type B (5 segments) is assigned to each block of 203a [TS2], b [TS3], c [TS4], d [TS5], e [TS6] and connected. The frames are connected by the frame configuration unit 204 and output to the reconnection frame configuration unit 205.

Super segment 2: A segment of type B (one segment) is assigned to a block 203f [TS7], input to the concatenated frame configuration unit 204, and output to the reconnection frame configuration unit 205.

Super segment 3: 13 segments of type A (1 13 segments) are assigned to the block 202a [TS1] and output to the reconnection frame configuration unit 205.

Super segment 4: A segment of type B (one segment) is assigned to a block of 203g [TS8], is input to the concatenated frame configuration unit 204, and is output to the reconnection frame configuration unit 205.

Super segment 5: 13 segments of type A (1 13 segments) are 202
b [TS9] is assigned to the block and output to the reconnection frame configuration unit 205.

In FIG. 4B,
Super segment 1: 13 segments of type A (1 13 segments) are allocated to the block 202a [TS1] and output to the reconnection frame configuration unit 205.

Super segment 2: Each segment of type B (7 segments) is 203a [TS2], b [TS3], c [TS4], d [TS5], e [TS6], f [TS7], g [TS8 ] Are concatenated by the concatenated frame configuration unit 204 and output to the reconnection frame configuration unit 205.

Super segment 3: 13 segments of type A (1 13 segments) are allocated to the block 202b [TS9] and output to the reconnection frame configuration unit 205.

[] Is the TS number input to each of the 13-segment format encoding unit 202 and the 1-segment format encoding unit 203. In the case of one segment format, the subchannel and TS number can be associated with each other.

In the example of FIG. 4A, the concatenated frame configuration unit 204 configures super segment 1 by concatenating five outputs of OFDM segments 203a, b, c, d, and e in one segment format, and super segment 2 is defined as 1 The segment segment is composed of one OFDM segment 203f output, and the super segment 4 is composed of one segment segment OFDM segment 203g output, each of which is made a type B super segment, and is output to the reconnection frame configuration section 205.

In the example of FIG. 4 (b), the concatenated frame configuration unit 204 configures the super segment 2 by concatenating seven outputs of the OFDM segments 203a, b, c, d, e, f, g in one segment format. The super segment of B is output to the reconnection frame configuration unit 205.

The outputs of the 13 segment format encoding units 202a and 202b are type A super segments, which are output to the reconnection frame configuration unit 205, respectively.

The reconnection frame configuration unit 205 receives the above type A super segment and type B super segment and concatenates these super segments to form a concatenated OFDM segment. When the super segments are connected, phase compensation for the center frequency difference and phase correction for pilot modulation phase mismatch are performed.

The IFFT / guard interval adding unit 206 converts the concatenated OFDM segment, which is an output signal of the reconcatenated frame configuration unit 205, into an OFDM signal by IFFT calculation, adds a guard interval, and converts it into an OFDM transmission signal. Then, it is converted into a digital broadcast transmission signal having a frequency determined by up-converter unit 207, power amplified by transmission amplifier unit 208, and transmitted by antenna 209.

This digital broadcast transmission signal is generated by collectively processing IFDM / guard intervals on connected OFDM segments. Here, the 13 segment format part is divided into a maximum of 3 layers (including 1 segment can be partially received), and the convolutional code coding rate, interleave length, carrier modulation method, etc. can be set independently for each layer. . Also for the one-segment format portion, it is possible to set a convolutional code coding rate, an interleave length, a carrier modulation scheme, and the like for each segment. The digital broadcast transmitting apparatus corresponding to the super segment configuration in the example of FIG. 2 performs nine transmission path encoding processes in parallel.

The concatenated transmission of this digital broadcast transmission method means that a plurality of segments (13 segment format and 1 segment format) are transmitted from the same transmission point without a guard band. In addition, the restrictions of parameters at the time of concatenated transmission are shown below.
(1) Modes are the same In concatenated transmission, it is necessary to synchronize OFDM symbols with each other, so modes with different symbol lengths cannot be mixed.
(2) Keeping the guard interval length the same For the same reason as in (1) above, if different guard intervals are used, the OFDM symbol lengths will be different, so they cannot be mixed.
(3) The number of Type A super segments shall be one or more. In the digital broadcast transmission method, the structure of the OFDM segment carrier structure so that multiple segments can be connected, and the bandwidth and transmission characteristics suitable for the service. And terrestrial digital television system and terrestrial digital audio system can be interoperable, and hardware and software resources can be shared.

Next, the configuration of the TMCC signal configured by the TMCC signal configuration unit 703 will be described with reference to FIGS.

FIG. 9 shows the TMCC signal configuration (TMCC carrier bit allocation). The TMCC signal is used to transmit information related to the demodulation operation of the receiver, such as a hierarchical configuration and transmission parameters of each OFDM segment. TMCC signal bit assignment was the same as that for terrestrial digital television broadcasting and terrestrial digital audio broadcasting. This is to facilitate the TMCC signal decoding process and reduce the burden on the receiver.

The differential demodulation standard is 1 bit and specifies the amplitude and phase standards.

The synchronization signal consists of a 16-bit word. There are two types of synchronization signals, w0 = 0011010111101110 and w1 = 1100101000010001 obtained by bit-inversion thereof, and w0 and w1 are alternately transmitted for each frame. The synchronization signal is used to establish synchronization of the TMCC signal and OFDM frame synchronization. In order to prevent the pseudo synchronization pull-in phenomenon that occurs when the bit pattern of the TMCC information coincides with the synchronization signal, the polarity of the synchronization signal is inverted for each frame. Since the TMCC information is not inverted every frame, pseudo synchronization pull-in can be avoided by inversion every frame.

The segment format identification is a signal for identifying whether the segment is a differential modulation unit or a synchronous modulation unit. It is composed of 3 -bit words, and is assigned “111” in the case of the differential modulation unit and “000” in the case of the synchronous modulation unit. The number of TMCC carriers varies depending on the segment format. When the partial reception segment belongs to the synchronous modulation unit, there is only one TMCC carrier. Even in this case, 3 bits are assigned to the identification signal so that reliable decoding is possible, and the inverted signal has the maximum intersymbol distance.

Figure 10 shows the bit assignment of TMCC information.

TMCC information is information that assists the demodulation and decoding operations of the receiver, such as system identification, transmission parameter switching index, emergency warning broadcast activation flag, current information, and next information. Of the 102 bits of TMCC information, 90 bits are currently defined, but the remaining 12 bits are reserved for future expansion. All the reserved bits are stuffed with “1”. Note that the B segment and C layer of the 1 segment format are secured in terms of bit allocation in order to maintain compatibility with the 13 segment format. However, as will be described later, information indicating an unused hierarchy is assigned.

The explanation of system identification is shown in FIG.

2 bits are assigned to the system identification signal. The 13-segment format compatible with the digital terrestrial television broadcasting system is “00”, and the 1-segment format compatible with the digital terrestrial audio broadcasting system is “01”. The remaining values are reserved.

The current information indicates the current layer configuration and transmission parameters, and the next information indicates the transmission parameters after switching, and these are sent simultaneously. This is intended to improve the response of the receiver by using current information, assuming that the receiver is powered on or the channel is switched during the countdown.

4 bits for switching one or more of transmission parameter information and flags (partial reception flag, carrier modulation scheme, convolutional coding rate, interleave length, number of segments) described later included in the current information and next information The transmission parameter switching index is counted down. When only the emergency warning broadcast activation flag or the linked transmission phase correction amount, which will be described later, is switched, the transmission parameter switching index is not counted down. By counting down the transmission parameter switching index, the receiver is notified of the switching and the timing is taken. This index usually takes a value of ‘1111’, but when the transmission parameter is switched, 1 is subtracted for each frame from 15 frames before the switching. It should be noted that after “0000”, it returns to “1111”. The switching timing is the next frame synchronization for sending “0000”. That is, the new transmission parameter is applied from the frame returned to ‘1111’. The next information can be set or changed at an arbitrary time before the switching countdown, but cannot be changed during the countdown.

Fig. 12 shows the allocation of emergency warning broadcast activation flags. In emergency alert broadcasting, the activation flag is set to '1' when activation control for the receiver is performed, and the activation flag is set to '0' when activation control is not performed.

The explanation of the partial reception flag is shown in FIG.

The partial reception flag is set to ‘1’ when the segment (segment No. 0) at the center of the transmission band is set for partial reception in the 13-segment format, and is set to ‘0’ otherwise. When segment No. 0 is set for partial reception, the layer is defined as layer A in FIG. In the case of the one segment format, the flag is set to “0”. This is consistent with the fact that the terrestrial digital audio system uses this flag as a format identification flag, which is ‘0’ for the 1-segment format and ‘1’ for the 3-segment format. If there is no next information, the flag is set to ‘1’.

FIG. 14 shows transmission parameter information included in the current / next information. If there is no unused layer or next information in the transmission parameter information, those bits are set to ‘1’.

FIG. 15 shows an explanation of the connected transmission phase correction amount.

In concatenated transmission, when a received segment uses the lower end carrier of the upper adjacent segment as a reference signal, it is used to correct the phase of the carrier for each symbol. If there is no phase correction, including the case of no concatenated transmission, “111” is set.

TMCC information B20 to B121 is error-correction-encoded with a shortened code (184,102) of the difference set cyclic code (273,191). TMCC information requires transmission reliability higher than that of a data signal in order to specify transmission parameters and control a receiver. Considering that it is difficult to share the decoding circuit of the concatenated code in the receiver and that the block code is advantageous from the viewpoint of processing delay, the error correction code of TMCC is a shortened code of the difference set cyclic code (273,191) ( 184,102). Further, since the TMCC signal is transmitted by a plurality of carriers, it is possible to reduce the required C / N and improve the reception performance by analog addition of the signals. With these error correction techniques and addition processing, the TMCC signal can be received with a smaller C / N than the data signal. In order to make the parity bits the same in all TMCC information, the synchronization signal and the segment format identification information are excluded from the error correction target, all the bits of the plurality of TMCC carriers are made the same, and each bit including the parity bits is included. Enables majority vote.

FIG. 16 shows an embodiment of a service of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of FIG.

1601 is a pushcast broadcast, 1602 is a mixed broadcast of pushcast broadcast and real-time broadcast, 1603 is real-time broadcast, and 1604 is pilot broadcast.

Pushcast broadcast 1601 is a service in which non-time-dependent file-type content is automatically downloaded. For example, electronic newspapers, music, sports clips, news clips, shopping, lifestyle information, gourmet magazines, cooking information, languages, dramas, movies, etc. can be considered. In addition, a menu linked to an information address (in FIG. 16, described as WEB) that can search for various types of information can be considered. The feature of pushcast broadcasting is that content can be distributed in advance and viewed at a time convenient for the user.

Real-time broadcast 1603 is a stream-type broadcast, and a program in which “watching now” is important is provided. For example, news, weather forecast, sports, etc. You may broadcast shopping, education, and premium programs in real time.

Mixed broadcast 1602 is a broadcast in which real-time broadcast and pushcast broadcast are mixed according to time.

Pilot broadcast 1604 navigates the entire service of pushcast broadcast 1601, mixed broadcast 1602, and real-time broadcast 1603. It also indicates which service is transmitted on which subchannel or which TS of which super segment. Therefore, it is necessary to determine in advance which frequency arrangement the pilot broadcast 1604 is sent.

FIG. 17 is an explanatory diagram showing an example of a segment configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention. FIG. 17 shows the segment configuration example described with reference to FIG. 4. In FIG. 17A, 1701 is a pilot segment, and in FIG. 17B, 1702 is a pilot segment.

The pilot segment is a segment for transmitting a pilot broadcast, and is a 1-segment format segment or a 13-segment format partial reception segment. In the example of FIG. 17A, the segment is [super segment 4, center subchannel number 1], and the center frequency is (216 + 1/7) MHz. In the example of FIG. 17B, the segment is [super segment 2, center subchannel number 10], and the center frequency is (214 + 6/7) MHz. This frequency arrangement is determined at this position in the example of FIG.

Further, as an example of assigning the service of FIG. 16 to the super segment, for example, in the case of FIG.

Super segment 1: Type B (5 segments) assigns 5 programs of real-time broadcast 1603 to each segment format, for example, TS2 news, TS3 weather, TS4 shopping, TS5 sports, TS6 Education.

Super segment 2: One program of real-time broadcast 1603 is assigned to type B (one segment one) in one segment format, and TS7 is made premium.

Super segment 3: Pushcast broadcast 1601 is assigned to type A (one 13 segment), and TS1 is set.

Super segment 4: A pilot broadcast 1604 is assigned as a pilot segment to Type B (one segment), and TS8 is set.

Super segment 5: Mixed broadcast 1602 is assigned to type A (one 13 segment), and TS9 is set.

Also, in the case of FIG.

Super segment 1: Mixed broadcast 1602 is assigned to type A (one 13 segment) and TS1.

Super segment 2: Type B (seven segments) type 6 (real-time broadcasting 1603) and pilot broadcasting 1604 as pilot segments are allocated to each segment format. For example, TS2 is news, TS3 is weather, TS4 is shopping TS5 is pilot broadcast 1604, TS6 is sport, TS7 is education, and TS8 is premium.

Super segment 3: Pushcast broadcast 1601 is assigned to type A (1 13 segments) and is TS9.

This assignment is performed by the multimedia signal generation unit 201 in FIG.

In the example of FIG. 17 (a), one type B super segment of one segment type is set as a pilot segment, and in the example of FIG. 17 (b), one of the seven type B super segments connected in one segment type is set as a pilot. It is a segment. Therefore, the example of FIG. 17A is suitable when processing is performed in units of super segments, and the example of FIG. 17B has characteristics that are suitable when processing is performed in units of TS.

FIG. 18 is a configuration example of program information which is an example of pilot information transmitted by pilot broadcasting. The program information includes the program identification representing the program, the broadcast type indicating whether the program is real-time broadcast, pushcast broadcast, or pilot broadcast, the date and time when it is broadcast, and the provider that broadcasts the program. There is an operator identification that represents. Furthermore, in order to select the program on the receiving side, information indicating which segment is being transmitted is necessary. As shown in [Formula 1], the center frequency of the segment being sent is determined if the start frequency and center subchannel number of the physical channel in which the super segment is arranged are known. Furthermore, the receiving side needs information on the super segment type, whether the segment is a 13-segment format or a 1-segment format.

In FIG. 18 (a), the program information is [date / time, program identification, broadcast type, operator identification, super segment number, super segment type, physical channel, central subchannel]. If the physical channel is determined in advance as shown in FIGS. 17A and 17B, only the physical channel number need be indicated. Of course, only the frequency of the physical channel itself or the start frequency or the end frequency of the physical channel may be indicated. This is because the bandwidth of the physical channel is determined to be 6 MHz.

In FIG. 18, not only the super segment types are indicated as type A and type B, but in the case of type A, a partial reception flag indicating whether or not this program is in the partial reception layer is provided. The number of segments connected is also shown.

By viewing the partial reception flag, there is an effect that it is possible to determine whether or not this program can be received by a one-segment receiver described later without selecting a channel and viewing the TMCC information.

Also, in the case of Type B, the super segment configuration in one segment format can be confirmed by indicating the number of connections in one segment format, and the super segment configuration can be determined by the super segment number.

Furthermore, by having “pilot” as the broadcast type, pilot broadcasts such as program advertisements can be performed in addition to the pilot segment.

In the example of FIG. 18A, there is an effect that the center frequency and super segment configuration of the segment to which the program is transmitted can be obtained only by extracting the program information.

FIG. 18 (b) is such that the TS number is sent as program information instead of the super segment number, super segment type, physical channel, and subchannel of FIG. 18 (a). As described with reference to FIG. 2, the TS number can be represented by a super segment number, a super segment type, and a subchannel, and the center frequency can be determined by the start frequency of the physical channel and the center subchannel number. As another information, this TS information is transmitted as pilot information.

In the example of FIG. 18B, it is easy to associate the TS number with the program identification and the operator identification, which is particularly convenient when assigning an operator for each TS.

FIG. 18 (c) shows the channel selection frequency on the receiving side directly in the program information. If the channel selection frequency and the super segment type are known, it can be determined whether or not reception is possible with a receiver described later.

In the example of FIG. 18 (c), the receiver can tune directly to the program simply by looking at the program information, and there is an effect that the tuning operation becomes easy.

Also, if the pilot information shown in FIG. 18 is sent, even if the super segment configuration changes from a certain date and time, the program information setting from a certain date and time can be changed to follow the contents of the change in the super segment configuration. For example, there is an effect that the receiver side can receive without being aware of the change of the super segment configuration. However, the position (frequency arrangement) of the pilot segment should not be changed.

FIG. 19 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to the second embodiment of the present invention. The digital broadcast receiving apparatus in FIG. 19 receives a digital broadcast transmission signal transmitted from the digital broadcast transmitting apparatus in FIG.

1926 is a digital broadcast receiver.

Reference numeral 1901 denotes an antenna, 1902 denotes a channel selection unit, 1903 denotes an orthogonal demodulation unit, 1904 denotes a fast Fourier transform (hereinafter referred to as FFT) unit, 1905 denotes demodulation / decoding operation for demodulating / decoding digital broadcast transmission signals from the FFT unit 1904 to the TS output. , 1906 is a synchronous reproduction unit, 1907 is a frame extraction unit, and 1908 is a TMCC decoding unit, which reproduces a synchronous signal for operating the demodulation / decoding unit 1905 and obtains information such as transmission parameters.

A front end (hereinafter referred to as F / E) unit 1924 is configured from the channel selection 1902 to the TMCC decoding unit 1908. 1928 is a descrambling part 1, 1929 is a descrambling part 2, 1909 is a demux part, 1910 is a decoding part of the compressed broadcast audio signal, 1911 is an audio output part for outputting the decoded broadcast audio signal, and 1912 is a compression part 1913 is a presentation processing unit constituting a display screen, 1914 is a video output unit for displaying the decoded broadcast video signal, and 1915 is PSI (Program Specific Information) / SI (Service Information). It is a system decoding unit that handles system information such as.

The descrambling part 1928, the descrambling part 2 1929, and the demax part 1909 to the system decoding part 1915 constitute a back-end trap (hereinafter B / E) part 1925.

1916 is a rewritable nonvolatile memory (hereinafter referred to as NVRAM), 1917 is a ROM such as a font (Read Only Memory), 1918 is a main memory RAM (Random Access Memory), and 1919 is a communication line interface (hereinafter I / F). , 1920 is an input / output unit (hereinafter referred to as I / O), 1921 is a system bus, 1922 is a central processing unit (hereinafter referred to as CPU), 1923 is a remote controller, 1930 is a CAS (Conditional Access System) that manages license information, 1931 Is a recording medium, and 1927 is a removable medium.

In the case of real-time broadcasting, a digital broadcast transmission signal input to the digital broadcast receiver 1926 by the antenna 1901 is converted into a TS (transport stream) by the F / E unit 1924. The demodulated TS is selectively decrypted by the descrambling unit 1928 using the license information stored in the CAS 1930. The license information may be supplied by the communication I / F 1919 via a network or may be supplied by the removable medium 1927. The decoded TS is separated into video, audio, and other data by the demax unit 1909, and the video stream is output to the video decoding unit 1912 and the audio stream is output to the audio decoding unit 1910. The decoded video signal forms a display screen by the presentation processing unit 1913 and is output by the video output 1914. The decoded audio signal is output as an audio output 1911.

In the case of push cast broadcasting, a digital broadcast transmission signal input to the digital broadcast receiving device 1926 by the antenna 1901 is converted into a TS (transport stream) by the F / E unit. The demodulated TS is input to the descramble 1 unit 1928, but is not decoded here. Subsequently, only the data related to the content to be stored is separated and stored in the recording medium 1931 by the input demax unit 1909.

When the access control common information and the access control individual information are distributed via the broadcast wave, they are separated by the demux unit 1909 and stored in the recording medium 1931. When the access control common information and the access control individual information are distributed via the network, they are acquired via the communication I / F 1919 before or during reproduction and stored in the recording medium 1931. When the access control common information and the access control individual information are distributed via the network, they are acquired via the I / O 1920 before or during reproduction and stored in the recording medium 1931.

At the time of reproduction, data related to the content to be reproduced is read from the recording medium 1931 and input to the descrambling 2 unit 1929 and encrypted using the access control common information and the access control individual information stored in the recording medium 1931. Decode data selectively. The decoded TS is separated into video, audio, and other data by the demax unit 1909, and the video stream is output to the video decoding unit 1912 and the audio stream is output to the audio decoding unit 1910. The decoded video signal forms a display screen by the presentation processing unit 1913 and is output by the video output 1914. The decoded audio signal is output as an audio output 1911.

In the above operation, the CPU 1922 controls each block of the F / E unit 1924 and the B / E unit 1925 via the system bus 1921 so that the digital broadcast receiver 1926 reproduces normal video and audio. Do.

At the time of data broadcast reception, the data is once transferred to the RAM 1918, NVRAM 1916 or the like and processed by the CPU 1922. In addition to normal video and audio playback processing, the data on the RAM 1918 is transferred to the video and audio decoder simultaneously with the presentation of the characters and graphics, and processing such as video and audio playback processing is performed. In addition, the communication I / F 1919 is used to exchange information with the outside of the digital broadcast receiver 1926.

The operation of the digital broadcast receiving apparatus can be performed with the remote controller 1923 via the I / O 1920.

Fig. 20 shows the types of digital broadcast receivers.

The digital broadcast transmission signal from the digital broadcast transmission apparatus in FIG. 2 includes a 13-segment super segment and a 1-segment super segment. Receivers that can receive each of these can be defined, but in addition, 13/1 segment format reception that can receive both 13 segment format and 1 segment format, and only the partial reception layer of 13 segment format in addition to 1 segment format receive Possible partial reception / single-segment reception can be defined. The digital broadcast receiving apparatus 1926 in FIG. 19 is either 13/1 segment format reception or partial reception / 1 segment format reception.

21 shows the configuration of the demodulation / decoding unit 1905 in the case of 13/1 segment format reception, and FIG. 22 shows the configuration of the demodulation / decoding unit 1905 in the case of partial reception / 1-segment format reception.

2101 and 2201 are input signals from the FFT unit 1904, 2102 and 2202 are carrier demodulation units, 2103 and 2203 are deinterleave units, 2104 and 2204 are demapping units, 2105 and 2205 are bit deinterleave units, 2106 and 2206. Is a depuncture unit, 2107 and 2207 are Viterbi decoding units, 2108 and 2208 are byte deinterleaving units, 2109 and 2209 are energy despreading units, 2110 and 2210 are TS reproduction units, and 211 and 211 are RS (Reed-Solomon) decoding units. Reference numerals 2112 and 2212 denote outputs of the demodulation / decoding unit 1905. The bit deinterleaving unit 2105, the depuncturing unit 2106, the byte deinterleaving unit 2108, and the energy despreading unit 2109 are respectively provided for three layers a, b, and c, and 2121 and 2123 are divided into three layers. It is a layer composition unit that composes layers.

First, the operation in the case of 13/1 segment format reception will be described with reference to FIGS.

The channel frequency band to be received by the channel selection unit 1902 is extracted from the digital broadcast transmission signal received by the antenna 1901, the signal channel-selected by the orthogonal demodulation unit 1903 is orthogonally demodulated into a baseband signal, and the frequency is output by the FFT unit 1904. It is converted to axis processing, and FFT is performed for a period corresponding to an effective symbol among OFDM symbols. At that time, the multipath situation of the received signal is taken into consideration, and the FFT processing is performed in an appropriate period. In response to this, in the demodulation / decoding unit 1905, the carrier demodulation unit 2102 performs demodulation processing on each carrier on the frequency axis (for example, synchronization using a scattered pilot (SP) for QPSK, 16QAM, and 64QAM). (Demodulation is performed to detect amplitude and phase information), frequency axis and time axis deinterleaving is performed by the deinterleaving unit 2103, and demapping is performed by the demapping unit 2104. Bit deinterleaving is performed by the interleaving units 2105a, b, and c, depuncturing is performed by the depuncturing units 2106a, b, and c, synthesis is performed by the layer synthesizing unit 2122, Viterbi decoding is performed by the Viterbi decoding unit 2107, and each layer is divided by the layer dividing unit 2121. Byte deinterleaving and energy in the interleaving unit 2108 -Despreading unit 2109 performs energy despreading, TS playback unit 2110 performs TS playback, RS decoding unit 2111 performs error correction, and a digital broadcast signal is demodulated. For example, transport defined in MPEG2 Systems A stream (TS) signal is output to the descramble 1 unit 1928 and the demax unit 1909. Here, in the case of receiving a signal in 1 segment format and in the case of receiving in 13 segment format, the system is identified by the system identification shown in FIG. 11 of the TMCC signal decoded by the TMCC decoding unit 1908, and the terrestrial digital audio In the case of a broadcasting system, a 1-segment format is received, and in the case of a terrestrial digital television broadcasting system, a 13-segment format is received (mainly handling the partial reception flag shown in FIG. 13). Further, when receiving a signal of one segment format, the layer division 2121 and 2123 do not perform layer division, but perform processing using, for example, a system block. Since no hierarchical division is performed, hierarchical synthesis in the hierarchical synthesis 2122 is not necessary. When receiving a partial reception layer, processing may be performed using only the system a as in the case of the one segment format, or may be divided into three layers and one of them may be processed as a partial reception layer. . In the case of reception of only one segment format and partial reception, the channel frequency band of the channel selection 1902 may be extracted as one segment.

Next, the operation in the case of partial reception / one-segment reception will be described with reference to FIGS.

The channel frequency band to be received by the channel selection unit 1902 from the digital broadcast transmission signal received by the antenna 1901, in this case, the frequency band for one segment is extracted, and the channel-selected signal is orthogonally demodulated by the orthogonal demodulation unit 1903. A band signal is converted into frequency axis processing by an FFT unit 1904, and FFT is performed for a period corresponding to an effective symbol among OFDM symbols. At that time, the multipath situation of the received signal is taken into consideration, and the FFT processing is performed in an appropriate period. In response to this, in the demodulation / decoding unit 1905, the carrier demodulation unit 2202 performs demodulation processing on each carrier on the frequency axis (for example, synchronization using scattered pilot (SP) for QPSK, 16QAM, and 64QAM). (Demodulate and detect amplitude and phase information), deinterleave unit 2203 for frequency axis and time axis, demap unit demapping unit 2204, bit deinterleave unit 2205, and depuncture unit 2206 Depuncture, Viterbi decoding unit 2207 performs Viterbi decoding, Byte deinterleaving unit 2208 performs byte deinterleaving, Energy despreading unit 2209 performs energy despreading, TS reproduction unit 2210 performs TS reproduction, and RS decoding unit 2211 performs error correction. Digital broadcasting The signal is demodulated, and, for example, a transport stream (TS) signal defined by MPEG2 Systems is output to the descramble 1 unit 1928 and the demax unit 1909. Here, in the case of receiving a signal of 1 segment format and in the case of partial reception of 13 segment format, the system is identified by the system identification shown in FIG. 11 of the TMCC signal decoded by the TMCC decoding unit 1908, and the terrestrial digital In the case of an audio broadcasting system, partial reception processing is performed in the 1 segment format, and in the case of a terrestrial digital television broadcasting system, partial reception processing is performed (mainly handling the partial reception flag shown in FIG. 13).

The other blocks of the F / E unit 1924 in FIG. 19 will be described.

The synchronization reproduction unit 1906 receives the baseband signal from the orthogonal demodulation unit 1903 and reproduces the OFDM symbol synchronization signal and the FFT sample frequency according to the mode and the guard interval length. When the mode and the guard interval length are unknown, the mode and guard interval length can also be determined based on the correlation of the guard period of the OFDM signal. Further, the frequency position of the TMCC signal is detected from the output signal of the FFT unit 1904. The frame extraction unit 1907 demodulates the TMCC signal at the detected frequency position and extracts a frame synchronization signal from the TMCC signal. The frame synchronization signal is output to the synchronization reproduction unit 1906, and phase adjustment with the symbol synchronization signal is performed. The TMCC decoding unit 1908 performs error correction of the differential cyclic code on the demodulated TMCC signal, and extracts TMCC information such as a hierarchical structure and transmission parameters. The TMCC information is output to the demodulation / decoding unit 1905 and used as various control information for the demodulation / decoding process. Since there is a phase difference between segments in the concatenated transmission signal, the carrier phase at the lower end of the upper adjacent segment must be corrected for reception of the synchronous modulation segment that uses the carrier at the lower end of the upper adjacent segment for demodulation.

The TMCC decoding unit 1908 is always operating when trying to receive an emergency alert broadcast, and monitors the emergency alert broadcast activation flag shown in FIG. At this time, the channel selection unit 1902, the quadrature demodulation unit 1903, the FFT unit 1904, the synchronous reproduction unit 1906, and the frame extraction unit 1907 are always operating. The operations of the channel selection unit 1902, the orthogonal demodulation unit 1903, the FFT unit 1904, the synchronous reproduction unit 1906, and the frame extraction unit 1907 are segment No. 0 in the case of the 13 segment format, that is, only the partial reception portion when receiving an emergency warning broadcast. It is only necessary to perform the process. Thereby, it can be set as a low power consumption operation | movement rather than processing the 13 segment full band of this digital broadcasting. In the case of the one segment format, only one segment band is sufficient.

The B / E unit 1925 in FIG. 19 will be described.

In descrambling 1 section 1928 and demax section 1909, descrambling of the scrambled TS signal for copyright protection is canceled, and the desired compressed broadcast video signal and compressed broadcast audio signal digital signal Are extracted and output to the decoding units 1910, 1912 and 1915. The decoding unit 1912 decodes the compressed broadcast video signal, the decoding unit 1910 decodes the compressed broadcast audio signal, and the decoded video signal forms a display screen in the presentation processing unit 1913, and the video output unit 1914 decodes the display screen. The audio signal thus output is output to the audio output unit 1911.

Next, the reception operation in the case of the pilot broadcast, pilot segment, and pilot information shown in FIGS. 16, 17, and 18 will be described with reference to FIGS.

In step 2301, the reception operation is started. In the reception operation, the CPU 1922 controls each block via the system bus 1921.

In step 2302, the channel selection unit 1902 first selects the pilot segment 1701 or 1702 at the frequency position determined.

In step 2303, the TS is demodulated by the F / E unit 1924, the pilot information of FIG. 18 is extracted by the descrambling unit 1928 and the demax unit 1909, and is decoded by the system decoding unit 1915.

Create a service channel list from the pilot information extracted in step 2304 and store it.

FIG. 24 shows an example of the service tuning table. They are organized by operator identification, broadcast type, date / time, and program type, and a channel selection frequency and a super segment type are assigned to each content of a real-time broadcast program or pushcast broadcast. The channel selection frequency is the center frequency of the center subchannel. When the super segment type is type A (13 segment format), it is indicated whether or not the program or content is in the partial reception layer ("○": partial reception layer, "x": layer other than partial reception). .

In step 2305, real-time broadcast, pushcast broadcast, and downloaded service table are displayed. In general, a real-time broadcast service table is preferentially displayed, and a user selects a pushcast broadcast or a downloaded service table using a menu or the like.

FIG. 25 shows an example of a service table. FIG. 25A shows an example of real-time broadcasting, FIG. 25B shows an example of pushcast broadcasting, and FIG.

In FIG. 25 (a), a program broadcast at the current time is displayed. In the case of partial reception / 1-segment format reception, a program cannot be received if it is transmitted in a layer other than the partial reception segment in type A (13-segment format). Disable selection.

In step 2306, select the program you want to watch. In addition, you may have a function which searches a program by a date, time, and a provider.

Tune in the program selected in step 2307. According to the service channel selection table of FIG. 24, when the channel selection unit 1902 is a channel selection frequency and transmission is performed by a type A other than partial reception, the channel frequency band is a 13-segment band, and the F / E unit 1924 is a 13-segment format demodulator. To do. In the case of transmission by partial reception in type A and in the case of type B, the channel frequency band is a band of one segment, and the F / E unit 1924 performs partial reception demodulation in case of partial reception, and in case of type B, one segment format demodulation. To do.

In step 2308, the program is output.

FIG. 25 (b) displays the contents that can be downloaded at present. In step 2309, the contents to be downloaded are selected. At this time, the already downloaded contents are displayed as “downloaded” so that they cannot be selected.

In step 2310, a download reservation is made. If it is time to download, the channel selection unit 1902 in step 2311 uses the reserved content from the channel selection table of FIG. 24 as the channel selection frequency, and if it is transmitted by type A other than partial reception, the channel frequency band is set to 13 segments. The F / E unit 1924 performs 13-segment format demodulation. In the case of transmission by partial reception in type A and in the case of type B, the channel frequency band is a band of one segment, and the F / E unit 1924 performs partial reception demodulation in case of partial reception, and in case of type B, one segment format demodulation. To do.

Downloaded at step 2312.

In FIG. 25 (c), already downloaded contents are displayed. Playback is selected at step 2313 and output at step 2314. The download service table may be selected at the start of step 2301.

As described above, according to the digital broadcast receiving method of FIGS. 23, 24, and 25, there is an effect that the digital broadcast transmission signal can be received without being aware of the segment configuration.

FIG. 26 is an explanatory diagram showing an example of a service configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus according to the third embodiment of the present invention.

2601 is a pushcast broadcast, 2602 is a mixed broadcast of pushcast broadcast and real-time broadcast, 2603 is a real-time broadcast, 2604 is a pushcast broadcast pilot broadcast, and 2605 is a real-time pilot broadcast. The difference from FIG. 16 is that the pilot broadcast is provided independently for the pushcast broadcast and the real-time broadcast. As in FIG. 16, it is necessary to determine in advance which frequency arrangement the pilot broadcasts 2604 and 2605 are sent.

FIG. 27 is an explanatory diagram showing an example of a segment configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention. FIG. 27 shows the segment configuration example described with reference to FIG. 2. In FIG. 27A, 2701 is a pilot segment for real-time broadcasting, 2702 is a pilot segment for pushcast broadcasting, and 2703 is real-time in FIG. A pilot segment for broadcasting, 2704 is a pilot segment for pushcast broadcasting.

The pilot segment is a segment for transmitting a pilot broadcast, and is a 1-segment format segment or a 13-segment format partial reception segment. In the example of FIG. 27A, the pilot segment 2701 for real-time broadcasting is a segment of [Super segment 2, center subchannel number 1], the center frequency is (210 + 1/7) MHz, and is used for pushcast broadcasting. Pilot segment 2702 is a segment of [super segment 4, center subchannel number 1], and the center frequency is (216 + 1/7) MHz. In the example of FIG. 27 (b), the pilot segment 2703 for real-time broadcasting is the segment of [super segment 2, center subchannel number 1], the center frequency is (213 + 4/7) MHz, and the pilot for pushcast broadcasting The segment 2704 is a segment of [Super segment 2, center subchannel number 19], and the center frequency is (216 + 1/7) MHz. This frequency arrangement is determined at this position in the example of FIG.

Further, as an example of assigning the service of FIG. 26 to the super segment, for example, in the case of FIG.

Super segment 1: Type B (5 segments) is assigned 5 programs of real-time broadcast 2603 to each segment format, for example, TS2 is news, TS3 is weather, TS4 is shopping, TS5 is sports premium, Let TS6 be an education.

Super segment 2: Pilot broadcast 2605 for real-time broadcast is assigned to type B (one segment) as a pilot segment for real-time broadcast, and TS7 is set.

Super segment 3: Mixed broadcast 2602 is assigned to type A (one 13 segment), and TS1 is set.

Super segment 4: Type B (one segment) is assigned a pilot broadcast 2604 for push cast broadcast as a pilot segment for push cast broadcast [TS8.

Super segment 5: Pushcast broadcast 2601 is assigned to type A (one 13 segment), and TS9 is set.

Further, in the case of FIG.

Super segment 1: Mixed broadcast 2602 is assigned to type A (one 13 segment), and TS1 is set.

Super segment 2: Type B (7 segments) assigns 5 programs of real-time broadcast 2603, pilot broadcast 2605 for real-time broadcast and pilot broadcast 2604 for push-cast broadcast to each one segment format, for example, TS2 Is a pilot broadcast 2605 for real-time broadcasting, TS3 is news, TS4 is weather, TS5 is shopping, TS6 is a sports premium, TS7 is education, and TS8 is a pilot broadcast 2604 for pushcast broadcasting.

Super segment 3: Pushcast broadcast 2601 is assigned to type A (1 13 segments) and is TS9.

This assignment is performed by the multimedia signal generation unit 201 in FIG.

FIG. 28 is a configuration example of program information which is an example of pilot information transmitted by pilot broadcasting. The difference from FIG. 18 is that the program information is divided into (1) real-time broadcast information and (2) pushcast broadcast information, which are transmitted in real-time broadcast pilot broadcast and pushcast broadcast pilot broadcast, respectively. In the example of FIG. 28, (3) pilot broadcast information is provided and transmitted in a pilot broadcast for real-time broadcast and a pilot broadcast for pushcast broadcast, each of which is a pilot broadcast for real-time broadcast or a pilot signal for pushcast broadcast Indicate.

In the examples of FIGS. 27 and 28, the program information for real-time broadcasting and pushcast broadcasting is separated, so that only the necessary broadcast information selected at that time can be obtained on the receiving side. This has the effect of shortening the time required to construct and display the service table shown in. Also, providing pilot broadcast information has an effect that the B / E unit 1925 can confirm whether the currently selected information is for real-time broadcast or pushcast broadcast.

In addition, in the segment arrangement of FIG. 27, pushcast broadcast and pushcast broadcast pilot broadcast, mixed broadcast and realtime broadcast pilot broadcast, realtime broadcast and realtime broadcast pilot broadcast, and in FIG. Since the mixed broadcast and the pilot broadcast for pushcast broadcast are arranged next to each other, there is an effect that it is easy for the reception side to easily receive the broadcast of each service and the pilot broadcast.

FIG. 29 is a flowchart showing a receiving operation of the digital broadcast receiving device 1926 in the fourth embodiment according to the present invention.

The reception operation in the case of the pilot broadcast, pilot segment, and pilot information shown in FIGS. 26, 27, and 28 will be described with reference to FIGS. The same reference numerals as those in FIG. 23 represent the same functions.

In step 2901, the reception operation is started. In the reception operation, the CPU 1922 controls each block via the system bus 1921.

In step 2906, first, real-time broadcasting, pushcast broadcasting, and downloaded are selected.

When “downloaded” is selected, the already downloaded content shown in FIG. 25C is displayed, selected for reproduction in step 2313, and output in step 2314.

When real-time broadcasting or pushcast broadcasting is selected, steps 2902a, 2903a, 2904a, 2905a, 2306, 2307, 2308 are performed for real-time broadcasting, and steps 2902b, 2903b, 2904b, 2905b, 2309, 2309, for push-cast broadcasting. 2310 is selected.

First, the case where real-time broadcasting is selected will be described.

In step 2902a, the channel selection unit 1902 selects the pilot segment 2701 or 2703 for real-time broadcasting at the frequency position determined first. It can be confirmed from the pilot broadcast information that the pilot segment is for real-time broadcasting.

In step 2903a, the F / E unit 1924 demodulates the TS, the descramble 1 unit 1928 and the demax unit 1909 extract the real-time broadcast information which is the pilot information for the real-time broadcast in FIG. 28, and the system decode unit 1915 decodes it. .

Create a service channel selection table for real-time broadcasting from the real-time broadcast information extracted in step 2904a and store it.

FIG. 30 (a) shows an example of a service channel selection table for real-time broadcasting. They are organized by operator identification, date / time, and program type, and a tuning frequency and a super segment type are assigned to each program of real-time broadcasting. The channel selection frequency is the center frequency of the center subchannel. When the super segment type is type A (13 segment format), it is indicated whether or not the program or content is in the partial reception layer ("○": partial reception layer, "x": layer other than partial reception). .

In step 2905a, a real-time broadcast service table is displayed.

FIG. 25 (a) shows an example of a service table for real-time broadcasting. The following is as described in FIG.

Next, the case where push cast broadcasting is selected will be described.

In step 2902b, the channel selection unit 1902 selects the pilot segment 2702 or 2704 for pushcast broadcasting at the frequency position first determined. It can be confirmed from the pilot broadcast information that the pilot segment is for push cast broadcasting.

In step 2903b, the F / E unit 1924 demodulates the TS, the descramble 1 unit 1928 and the demax unit 1909 extract pushcast broadcast information which is pilot information for pushcast broadcast in FIG. 28, and the system decode unit 1915 Decode.

Create a service channel list for pushcast broadcast from the pushcast broadcast information extracted in step 2904a and store it.

FIG. 30 (b) shows an example of a service channel selection table for pushcast broadcasting. They are organized by operator identification, date / time, and program type, and a tuning frequency and a super segment type are assigned to each pushcast broadcast content. The channel selection frequency is the center frequency of the center subchannel. When the super segment type is type A (13 segment format), it is indicated whether or not the program or content is in the partial reception layer ("○": partial reception layer, "x": layer other than partial reception). .

In step 2905b, a pushcast service table is displayed.

FIG. 25 (b) shows an example of a service table for pushcast broadcasting. The following is as described in FIG.

As described above, according to the digital broadcast receiving method of FIGS. 29 and 30, there is an effect that the digital broadcast transmission signal can be received without being aware of the segment configuration. Also, since the program information for real-time broadcasting and pushcast broadcasting is separated, only the necessary broadcast information selected at that time can be obtained, and the service table shown in FIG. 25 is constructed by obtaining the information. This has the effect of shortening the time until display. Also, providing pilot broadcast information has an effect that the B / E unit 1925 can confirm whether the currently selected information is for real-time broadcast or pushcast broadcast.

Further, when selecting a pilot segment at 2902a and b, pilot broadcast for pushcast broadcast and pushcast broadcast, pilot broadcast for mixed broadcast and real-time broadcast, pilot broadcast for real-time broadcast and real-time broadcast, In 27 (a), the mixed broadcast and the pilot broadcast for pushcast broadcast are arranged next to each other. Therefore, if the broadcast of the respective services and the pilot broadcast are received together on the receiving side, in step 2307 There is an effect that it is possible to shorten the tuning time at the time of tuning or downloading.

FIG. 31 is an explanatory diagram showing an example of a service configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus according to the fifth embodiment of the present invention.

3101, 3102 and 3103 are broadcast service groups composed of pushcast broadcasts, real-time broadcasts, and pilot broadcasts having pilot information of those broadcasts. The difference from FIG. 16 is that the broadcast service group that basically performs mixed broadcast is not divided into pushcast broadcast, mixed broadcast, and real-time broadcast, and the pilot service is provided in the broadcast service group. It only has pilot information for broadcasting inside.

FIG. 32 is an explanatory diagram showing an example of a segment configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention. FIG. 27 shows the segment configuration example described in FIG. 4B, where 3201 is a pilot segment of the broadcast service group 3101, 3202 is a pilot segment of the broadcast service group 3103, and 3203 is a pilot segment of the broadcast service group 3102.

The pilot segment is a segment for transmitting a pilot broadcast, and is a 1-segment format segment or a 13-segment format partial reception segment. In the example of FIG. 32, the pilot segment 3201 of the broadcast service group 3101 is a 13-segment partial reception segment of [super segment 1, center subchannel number 22], the center frequency is (210 + 4/7) MHz, The pilot segment 3202 of the service group 3103 is a segment of [super segment 2, center subchannel number 10], the center frequency is (214 + 6/7) MHz, and the pilot segment 3203 of the broadcast service group 3102 is [super segment 3, The partial reception segment of the 13-segment format of the center subchannel number 22], the center frequency is (219 + 1/7) MHz. This frequency arrangement is determined at this position in the example of FIG.

Further, an example in which the service of FIG. 31 is allocated to the super segment of FIG. 32 is as follows.

Broadcast segment 3101 is assigned to Super Segment 1: Type A (1 13 segments) and is designated TS1.

Super segment 2: Broadcast service group 3103 is assigned to type B (7 segments per segment) in each segment format, TS2 is news (real-time broadcast), TS3 is weather (real-time broadcast), TS4 is sports (real-time broadcast), TS5 is pilot broadcasting, TS6 is education (real-time broadcasting), TS7 is shopping (pushcast broadcasting), and TS8 is premium (pushcast broadcasting).

Super segment 3: Broadcast service group 3102 is assigned to type A (one 13 segment) to be TS9.

That is, each broadcasting service group is assigned to a super segment. This allocation is performed by the multimedia signal generator 201 in FIG.

FIG. 33 is a configuration example of program information which is an example of pilot information transmitted by pilot broadcasting. 18 differs from FIG. 18 in that the program information is divided into (1) super segment 1 information, (2) super segment 2 information, and (3) super segment 3 information, and broadcast information in each super segment is divided into each super segment. It is to be transmitted by pilot broadcasting.

32 and 33, broadcast service groups are assigned to super segments, pilot programs for pilot broadcasting are provided for each super segment, and program information is transmitted. Therefore, on the receiving side, program information can be managed in units of super segments. Since it is good, it is possible to obtain only the information of the necessary super segment selected at that time, and it is possible to shorten the time until the information is obtained and the service table shown in FIG. 25 is constructed and displayed.

In the segment arrangement shown in FIG. 32, a receiving apparatus capable of receiving in the 13-segment format receives a super segment 1 or a super segment 3 type A super segment, and one segment connected in units of super segments. A receiving apparatus capable of receiving a format has an effect of selecting a program only in the super segment received by using the pilot broadcast in the super segment by collectively receiving the super segment 2.

Furthermore, since pilot broadcasting (pilot segment) is arranged in the type A (13 segment format) partial reception layer, pilot broadcasting (pilot segment) of the type A super segment service group even in a 1 segment format receiver. Can be received.

FIG. 34 is a flowchart showing a receiving operation of the digital broadcast receiving apparatus 1926 in the sixth embodiment according to the present invention.

The reception operation in the case of the pilot broadcast, pilot segment, and pilot information in FIGS. 31, 32, and 33 will be described with reference to FIGS. The same reference numerals as those in FIG. 23 represent the same functions.

In step 3401, the reception operation is started. In the reception operation, the CPU 1922 controls each block via the system bus 1921.

In step 3406, a super segment is first selected. In the example of FIG. 32, there are three super segments. Here, for example, a super segment may be assigned to a broadcasting company, and the broadcasting company may be selected in the menu.

After selecting any one of the super segments 1, 2, and 3, they are allocated to a system, b system, and c system in steps 3402, 3403, and 3404, respectively. Since these operations are the same, the description will be made by omitting the subscripts of 1, 2, 3, and a, b, and c.

After selecting a super segment, the channel selection unit 1902 selects a pilot segment (3201 for super segment 1, 3202 for super segment 2, 3203 for super segment 3) at the predetermined frequency position of the super segment selected in step 3402. Bureau.

In Step 3403, the F / E unit 1924 demodulates the TS, the descramble 1 unit 1928 and the demax unit 1909 extract the super segment information which is pilot information of FIG. 33, and the system decode unit 1915 decodes it.

Create a service tuning table for each super segment from the super segment information extracted in step 3404 and store it.

Fig. 35 shows an example of the service tuning table. Each super segment is organized by operator identification, broadcast type, date / time, and program type, and a tuning frequency and a super segment type are assigned to each program. The channel selection frequency is the center frequency of the center subchannel. When the super segment type is type A (13 segment format), it is indicated whether or not the program or content is in the partial reception layer ("○": partial reception layer, "x": layer other than partial reception). .

In step 3405, real-time broadcast, pushcast broadcast, and downloaded service table are displayed. In general, a real-time broadcast service table is preferentially displayed, and a user selects a pushcast broadcast or a downloaded service table using a menu or the like.

FIG. 25 shows an example of a service table. FIG. 25A shows an example of real-time broadcasting, FIG. 25B shows an example of pushcast broadcasting, and FIG. The following is as described in FIG.

As described above, according to the digital broadcast receiving method of FIGS. 34 and 35, there is an effect that the digital broadcast transmission signal can be received without being aware of the segment configuration. In addition, since broadcasting service groups are assigned to super segments and pilot segments are provided for each super segment to transmit program information, program information can be managed in units of super segments. Only the information of the super segment can be obtained, and there is an effect that it is possible to shorten the time from obtaining the information to constructing and displaying the service table shown in FIG.

In the segment arrangement shown in FIG. 32, a receiving apparatus capable of receiving in the 13-segment format receives a super segment 1 or a super segment 3 type A super segment, and one segment connected in units of super segments. A receiving apparatus capable of receiving a format has an effect of selecting a program only in the super segment received by using the pilot broadcast in the super segment by collectively receiving the super segment 2.

Furthermore, since pilot broadcasting (pilot segment) is arranged in the type A (13 segment format) partial reception layer, pilot broadcasting (pilot segment) of the type A super segment service group even in a 1 segment format receiver. Can be received.

FIG. 36 is an explanatory diagram showing an example of pilot information of a digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus according to the seventh embodiment of the present invention.

The pilot information in FIG. 36 is characterized in that version information is provided in addition to the program information in FIG. The version information consists of a pilot version number and the next scheduled update date and time.

The pilot version number is incremented by one when any change is made to the pilot information. The next time it reaches full scale, it returns to zero.

The next scheduled update date and time indicates the date and time when the pilot information will be changed next.

Next, TS transmission system information will be described. This information is transmitted in a TS of a broadcast other than the pilot broadcast. In the example of FIG. 36, pilot version information is provided in this information. The pilot version information has the same contents as the version information of the pilot information.

36, there is an effect that the version information of the pilot information can be managed on the receiving side by providing the version information. Further, providing the next update scheduled date and time has an effect that the receiver can prepare for the next update. Furthermore, since pilot version information is provided as TS transmission system information in TS of other broadcasts other than pilot broadcasts, real-time broadcasts and push cast broadcasts other than pilot broadcasts are not received. In this case, the pilot broadcast version information can be obtained from the received TS.

In this embodiment, version information is added to the pilot signal of FIG. 18B, but the pilot information of FIGS. 18A, 18C, 28A, 28B, and 33C is used. May be added to

FIG. 37 is a flowchart showing a receiving operation of the digital broadcast receiving apparatus 1926 in the eighth embodiment according to the present invention.

36 will be described with reference to FIGS. 19 and 37. FIG. The same reference numerals as those in FIG. 23 represent the same functions.

In step 3701, the reception operation is started. In the reception operation, the CPU 1922 controls each block via the system bus 1921.

In step 3702, the digital broadcast receiving apparatus 1926 confirms whether the version information of the pilot information is available.

If the version information of the pilot information is available, the pilot version numbers of the pilot information and the pilot version information of the TS transmission system information are compared in step 3703. If the pilot version numbers are the same, the scheduled update date is confirmed in step 3704. If it is before the scheduled update date, it is determined that the service channel list is the same as that previously created, and the service table is displayed in step 2305.

If the version information is not available in step 3702, the digital broadcast receiving device 1926 is first started up, the system is reset, etc. In this case, the service tuning table has not yet been created. Therefore, the service tuning table is created after step 2302.

If the pilot version number of the pilot version information of the TS transmission system information is updated more than the pilot version number of the version information of the pilot information in step 3703, the pilot information is updated, so the service channel selection table needs to be updated. After step 2302, the service tuning table is updated.

If the update date is after the scheduled update date in step 3704, the service tuning table needs to be updated because the pilot information has been updated, and after step 2302, the service tuning table is updated.

The operations in Step 2302 and Step 2303 are as described in FIG. In step 2303, version information is also extracted as pilot information. In step 3705, version information is stored. Thereafter, in step 2304, a service channel selection table is created or updated and stored. In step 2305, the service table is displayed.

Steps 2306, 2307, and 2308 when real-time broadcasting is selected in Step 2305, Steps 2309, 2310, 2311, and 2312 when Pushcast broadcasting is selected, and Steps 2313 and 2314 when Downloaded is selected are as follows. As described in FIG.

In FIG. 37, after selecting and demodulating in steps 2307 and 2311 in real-time broadcasting and pushcast broadcasting, pilot version information is extracted and stored. Real-time broadcasting is processed in steps 3706a, 3707a, 3708a, and pushcast broadcasting is processed in steps 3706b, 3707b, 3708b. Since the operations are the same, the operations will be described with the subscripts a and b omitted.

In step 3706, the pilot version information is extracted from the TS transmission system information of FIG. 36 by the descrambling 1 unit 1928 and the demax unit 1909 from the TS demodulated in step 2307, and decoded by the system decoding unit 1915.

In step 3707, the pilot version number of the pilot version information is confirmed, and if it has been updated as compared with what has been stored previously, or if there is no previous storage, the process proceeds to step 3708.

In step 3708, the pilot version number of the pilot version information is stored, and the process returns to step 3706.

In step 3707, the pilot version number of the pilot version information is confirmed, and if it is the same as previously stored, the process returns to step 3706.

In this way, steps 3706, 3707, and 3708 are repeated to always update the pilot version information to the latest one.

As described above, according to the digital broadcast receiving method of FIG. 37, there is an effect that the digital broadcast transmission signal can be received without being aware of the segment configuration. Also, version management of pilot information using version information has the effect of promptly displaying the service table when the pilot version number is the same (not updated) and before the scheduled update date and time. . Furthermore, since pilot version information is provided as TS transmission system information in TS of other broadcasts other than pilot broadcasts, real-time broadcasts and push cast broadcasts other than pilot broadcasts are not received. In this case, it is possible to obtain the pilot version information from the received TS and confirm the update of the pilot information.

FIG. 38 is an explanatory diagram showing an example of a segment configuration of a digital broadcast transmission signal transmitted by the digital broadcast transmission device according to the ninth embodiment of the present invention. 38 shows the segment configuration example described with reference to FIG. 4. In FIG. 38, reference numerals 3801 and 3802 denote pilot segments in the segment configuration examples (a) and (b), respectively.

The pilot segment is a segment for transmitting a pilot broadcast, and is a 1-segment format segment or a 13-segment format partial reception segment. FIG. 38 differs from the segment configuration example of FIG. 17 in that the frequency arrangement of the pilot segments is aligned in FIGS. 38 (a) and 38 (b).

In the example of FIG. 38A, the pilot segment 3801 is a segment of [super segment 4, center subchannel number 1], the center frequency is (216 + 1/7) MHz, and in the example of FIG. The segment 3802 is the segment of [Super segment 2, center subchannel number 19], the center frequency is (216 + 1/7) MHz, and the frequency arrangement of the pilot segments is the same in FIGS. 38 (a) and (b). is there. This frequency arrangement is determined at this position in the example of FIG.

Further, as an example of assigning the service of FIG. 16 to the super segment, for example, in the case of FIG.

Super Segment 1: Type B (5 segments) is assigned 5 programs of real-time broadcast 1603 to each segment format, TS2 is news, TS3 is weather, TS4 is shopping, TS5 is sport, TS6 is education To do.

Super segment 2: One program of real-time broadcast 1603 is assigned to type B (one segment one) in one segment format, and TS7 is made premium.

Super segment 3: Pushcast broadcast 1601 is assigned to type A (one 13 segment), and TS1 is set.

Super segment 4: A pilot broadcast 1604 is assigned as a pilot segment to Type B (one segment), and TS8 is set.

Super segment 5: Mixed broadcast 1602 is assigned to type A (one 13 segment), and TS9 is set.

Also, in the case of FIG.

Super segment 1: Pushcast broadcast 1601 is assigned to type A (1 13 segments), and TS1 is set.

Super segment 2: Type B (7 segments), 6 programs of real-time broadcast 1603 and pilot broadcast 1604 as pilot segments are allocated to each segment format, TS2 is news, TS3 is weather, TS4 is shopping, TS5 Are sports, TS6 is education, TS7 is premium, and TS8 is pilot broadcasting 1604.

Super segment 3: Mixed broadcast 1602 is assigned to type A (one 13 segment), and TS9 is set.

As described above, the broadcasting at the TS level is made the same in the cases of FIGS. 38 (a) and 38 (b). This allocation is performed by the multimedia signal generator 201 in FIG.

In the example of FIG. 38 (a), one type B super segment of one segment type is used as a pilot segment, and in the example of FIG. 17 (b), one of the seven type B super segments connected in one segment type is pilot. It is a segment. Therefore, the example of FIG. 38 (a) is suitable when processing is performed in units of super segments, and the example of FIG. 38 (b) is suitable when processing is performed in units of TS.

FIG. 39 is an example of pilot information transmitted by pilot broadcasting.

Physical channel information defines the frequencies of three physical channels, physical channels 1, 2, and 3. The frequency of the physical channel may be indicated by a start frequency to an end frequency, and since the physical channel bandwidth is determined to be 6 MHz, it may be defined by the start, end, and center frequencies. Note that the frequency position of the physical channel may be defined by overlapping some bands. In this case, the frequency bandwidth of the overlapping portion is an integral multiple of 6/14 MHz.

The super segment information links the super segment number and the super segment configuration. Super segment type {type A (13 segments), type B (1 segment)}, number of connections, physical channel numbers {1, 2, 3}, center subchannel number {0 to 41} (13 segments for 13 segments) By indicating the value of the central segment), the super segment configuration and its frequency arrangement are determined.

TS information associates TS number (see Fig. 2) and super segment structure. If the super segment number, super segment type, and center subchannel number are known, the transmission segment of the TS number can be determined, and as a result, the transmission frequency arrangement can be known.

FIG. 40 (a) shows the physical channel information, super segment information, and TS information of FIG. 38 (a) and FIG. 40 (b).

If the frequency arrangement of the pilot segments that are the pilot broadcasts in FIG. 38 and the pilot information transmitted in the pilot broadcasts in FIG. 39 are the same, the frequency arrangements of the pilot segments are the same in FIGS. In the case where the pilot segment of the frequency arrangement selected is first selected and demodulated, the super segment configuration can be recognized from the pilot information of FIG. 39. Therefore, when processing is performed in units of super segments of FIG. To a super segment configuration suitable for processing in units of TS in FIG. 38 (b), and a super segment suitable for processing in units of TS in FIG. 38 (b). Suitable for processing from the segment configuration to the super segment unit of FIG. To par segment configuration, there is an effect that can be changed at any time.

FIG. 41 is an explanatory diagram showing another embodiment of the segment configuration of the digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention. 41 is an example of the segment configuration described in FIG. 4, and in FIG. 41, 1703 is a pilot segment.

The pilot segment is a segment for transmitting a pilot broadcast. In this example, it is a segment of one segment format. In the example of FIG. 41, the segment is [Super segment 1, center subchannel number 1].

In FIG. 42, for the super segment configuration as shown in FIG. 41, the data for each 13 segment, the situation in which the data for 1 segment is stored, and the data for 13 segments are 12 segment data and 1 segment. A situation in which data is hierarchically multiplexed is shown as processing of the contents of the multimedia signal generator 101.
With this processing configuration, for each super segment as shown in FIG. 41, data for 13 segments, data for 1 segment, or data for a pilot segment is stored.

Due to this multiplexing mechanism, information on transmission services in each super segment is gathered in each super segment, and information summarizing information on transmission services in each of the plurality of super segments is equivalent to pilot information. The information can be stored in the pilot segment, and the processing framework for the conventional digital broadcasting can be used as the processing after selecting and specifying the super segment.

Next, another example of the receiving operation in the case of the pilot broadcast, pilot segment, and pilot information of FIGS. 16, 41, and 18 will be described with reference to FIG.
In this example, after switching the channel selection to the super segment to which the program or content selected as the reception target belongs, the program information in the super segment is retaken to ensure the uniqueness of the desired process. is there.

In step 2301, the reception operation is started.

In step 2302, first, a pilot segment 1703 at a determined frequency position is selected.

In step 2303, the TS is demodulated, and the pilot information shown in FIG. 18 is extracted and decoded.

From the pilot information extracted in step 2304, a service channel list (entire program schedule information list) is created and stored.

In step 2305, real-time broadcasting, pushcast (filecast) broadcasting, and a downloaded service table are displayed.

In step 2306, select the program you want to watch.

Tune in the program selected in step 2307. Referring to the service channel selection table of FIG. 24, when the channel selection unit 1902 is a channel selection frequency and transmission is performed in a type A other than partial reception, the channel frequency band is set to 13 segments, and 13 segment format demodulation is performed. In the case of transmission by partial reception in type A and in the case of type B, the channel frequency band is set as a band of one segment. In the case of partial reception, partial reception demodulation is performed, and in the case of type B, one segment format demodulation is performed.

In step 2315, program information being transmitted (and program information to be subsequently transmitted) in the super segment (SS) in which real-time broadcasting is being streamed is acquired. In step 2316, a reception target program in the super segment (SS) is selected and processed.
In step 2308, the program is output.

In step 2309, select the content you want to download. At this time, the already downloaded contents are displayed as “downloaded” so that they cannot be selected.

In step 2310, a download reservation is made. If it is time to download, the channel selection unit 1902 in step 2311 uses the reserved content from the channel selection table of FIG. 24 as the channel selection frequency, and if it is transmitted by type A other than partial reception, the channel frequency band is set to 13 segments. The 13-segment format demodulation is performed. The channel frequency band is set to one segment band in the case of transmission by partial reception in type A and in the case of type B, partial reception demodulation in the case of partial reception, and one segment format demodulation in the case of type B.

In step 2317, program information being transmitted (and program information to be subsequently transmitted) in the super segment (SS) in which pushcast (filecast) broadcasting is being transmitted is acquired. In step 2318, the download acquisition target content in the super segment (SS) is selected.
In step 2312, it is downloaded. Playback is selected at step 2313 and output at step 2314.

As described above, according to the digital broadcast receiving method of FIG. 43, the overall program schedule information and the program information being transmitted (and the subsequent program information to be subsequently transmitted) are in different super segments with respect to the segment structure of the digital broadcast transmission signal. Even in the case of being arranged and transmitted, there is an effect that it can be received accurately without being aware of it.

FIG. 44 is an example in which an operation for performing reserved recording is further added to the example of FIG. 43, and the recording reservation processing in step 2319 and the subsequent processing are added.

In the case of reserved recording, a program to be acquired is designated in advance and an actual recording operation is started at the time as in the case of download reservation.
In step 2306, a program to be reserved and recorded is selected. At this time, a program that has already been recorded is displayed as “recorded” so that it cannot be selected.

In step 2319, the recording reservation is registered.

When the recording start time is reached, in step 2320, the channel selection unit 1902 uses the content reserved by the service channel selection table of FIG. 24 as the channel selection frequency, and if it is transmitted by type A other than partial reception, the channel frequency band is set. The 13-segment format is demodulated using a 13-segment band. In the case of transmission by partial reception in type A and in the case of type B, the channel frequency band is set to a band of one segment, partial reception demodulation is performed in the case of partial reception, and single segment format demodulation is performed in the case of type B.

In step 2321, program information being transmitted (and program information to be subsequently transmitted) in the super segment (SS) in which real-time broadcasting is being streamed is acquired. In step 2322, a recording target program in the super segment (SS) is selected and processed.
In step 2323, a recording process is executed.

As described above, according to the digital broadcast reception and reservation recording method of FIG. 44, the whole program schedule information and the program information being transmitted (and the subsequent transmission schedule program information) are different from each other with respect to the segment structure of the digital broadcast transmission signal. Even if it is placed in a segment and sent out, there is an effect that reservation recording can be executed accurately without being aware of it.

FIG. 45 shows a processing flow when transmitting a storage type content file among the digital broadcast transmission signals transmitted by the digital broadcast transmission apparatus of the present invention.

The storage-type content main body file 3301 is divided into block size units defined by FLUTE and AL-FEC determined in advance in the file block dividing step 3302, and in FLUTE / AL-FEC processing step 3303, FLUTE packetization and error are performed. A correction code is added. Further, in UDP / IP / ROHC processing step 3304, after UDP / IP packetization and header compression, encapsulation is performed in ULE encapsulation processing 3305, and MPEG-2_TS payload is performed in IP_Over_MPEG-2_TS processing 3306. Embedding is performed. Further, the transmission path encoding unit 3307 performs TS packet multiplexing, and a broadcast TS 3308 is generated. This broadcast TS 3308 is transmitted as broadcast wave data.

FIG. 46 shows a processing flow when a content file is received among the digital broadcast transmission signals received by the digital broadcast receiving apparatus of the present invention.
The broadcast TS 3308 is received, the layer decoding unit 3309 performs layer separation and demodulation processing, the MPEG-2_TS parsing & payload group reconstruction 3310 selects and extracts the desired MPEG-2_TS packet specified by the PID, and the header unit And the payload part are separated. The ULE capsule unpacking unit 3311 expands the ULE capsule contents of the MPEG-2_TS payload, the UDP / IP / ROHC payload extraction unit 3312 expands the compressed header, expands the packet, and extracts the FLUTE / AL-FEC payload & Error detection unit 3313 performs error detection and error correction processing if possible, restores the FLUTE session, reconfigures the file content using split file combination / reconstruction 3314, and acquires content main body file group 3315.

FIG. 47 shows the processing flow up to the generation of the content file 3301 regarding the content file included in the digital broadcast transmission signal transmitted by the digital broadcast transmission apparatus of the present invention on the service providing side as shown in FIG. Show.

The present embodiment provides a content transmitting apparatus or receiving apparatus that adaptively presents program content information according to the elapsed playback time of content by effectively using metadata on the premise of information association and content distribution Explain what to do.

More specifically, in this embodiment, a procedure until the program content information 3401 classified by elapsed playback time as metadata is stored in the form of content is shown. The program content information 3401 by playback elapsed time defines the program content of the content by playback elapsed time, and cannot be presented unless the playback elapsed time reaches a predetermined time.

Here, FIG. 48A shows an example of components of the program content information 3401 classified by elapsed playback time. A content ID 3403 and a program content information table 3403 that uniquely indicate the content are included. As shown in FIG. 48B, the program content information table 3403 includes a start point time 34041, an end point time 34042, and program content information 34043.

The start point time 34041 indicates the start point of the elapsed playback time when the program content information 34043 becomes valid, and the end point time 34042 indicates the end point of the elapsed playback time when the program content information 34043 becomes valid. In FIG. 48 (b), these are described in the format of hours: minutes: seconds, but the format is not particularly limited as long as the playback elapsed time can be determined. In addition, the end time 34042 can be omitted because it often coincides with the start time 34041 of the next program content information.

For example, when the elapsed playback time of this content is 20 minutes, the start time 34041 is included in the period of 00:15:00 and the end time 34042 is included in the period of 00:35:00. “Guest OO...” Becomes valid, and the program content information 34043 in which the presentation process 1913 is valid can be presented.

When the elapsed playback time of this content is 20 minutes, the start point time 34404 is not included in the period of 00:00:00 and the end point time 34402 is not included in the period of 00:15:00, but the playback elapsed time is the start point time 34404. Because it has reached 00:00:00, it is determined that this program content information 34043 is already valid, and this program content information 34043 “totally new quiz ...” is referred to as the above program content information 34043 “unusual guest” It may be presented together with “XX ...”.

FIG. 49 further extracts the program content information 3411 by elapsed playback time as metadata from the content file 3315 of the digital broadcast transmission signal received by the digital broadcast receiver shown in FIG. A processing flow from reconfiguration to reflection in the presentation processing is shown.

46. From the content file 3315 shown in FIG. 46, in-file information extraction step 3410, the program content information 3411 by reproduction elapsed time as metadata is extracted. Subsequently, the playback elapsed time acquisition step 3412 acquires the playback elapsed time of the content from the recording medium 306 of the receiving apparatus. Then, in program content information acquisition and reflection step 3413, effective program content information is acquired and updated according to the elapsed playback time of the content, and the presentation processing 1913 outputs the updated program content information as a video.

FIG. 50 shows an example of a metadata description method that includes program content information by elapsed playback time as a component, and this metadata is transmitted by the metadata transmission device 4108. Here, an example in which metadata is described in XML (eXtensibleXMarkup Language) will be described.

The <? Xml> tag at the beginning is the XML declaration part. A portion surrounded by the <TVMain> tag is a program information table description section, which indicates a division unit of information of one program.

The part enclosed by <ProgramDesciption> tag indicates that it is information of one program. Further, a portion surrounded by <ProgramInformationTable> tags indicates a program information table. A portion surrounded by <ProgramInformation> tags indicates program information, and this tag has programId which is an ID for uniquely identifying a program as attribute information.

The part enclosed by the <BasicDescription> tag is a program basic information description part, in which basic information of the program is described. The program basic information description section includes a <Title> tag and a <Synopsis> tag. A portion surrounded by <Title> tags indicates a program name, and a portion surrounded by <Synopsis> tags indicates program contents. The attribute information of this tag includes startTime indicating the start point time at which the program content described here is valid, and endTime indicating the end point time at which the program content is valid.

However, attribute names and attribute values are not limited to this name and format. If information that can calculate the period during which the program content is valid is described, either the attribute information startTime or endTime may be omitted. Further, the effective program content information is not limited to one, and all program content information related to this content that has been valid in the past may be kept valid.

As described above, metadata is described so that effective program content information can be selected from a plurality of described program content information.

FIG. 51 shows an example of a screen including program content information by elapsed playback time presented when the received content is selectively played back.

The reproduction content selection screen example 5101 includes a thumbnail image 5102, a program title 5103, a reproduction elapsed time 5104, and reproduction progress-specific program content information 5105, but the display layout is not limited to this. In addition to these pieces of information, further information may be displayed, or some of these pieces of information may be displayed.

The thumbnail image 5102 is a moving image or a still image cut out from the content video, but this thumbnail image is not essential. In addition, a program title 5103 for identifying a program, a playback elapsed time 5104 indicating the watched time of this content, and program content information 5105 by playback progress defined according to the playback elapsed time 5104 are presented.

In this screen example 5101, it is assumed that there are three contents already received, and the remaining two contents have the same configuration as described above. Here, when the quiz XYZ is selected as a program to be played back, a transition to the playback operation may be made immediately, or a detailed content display screen 5201 shown in the screen example of FIG. 52 may be presented.

FIG. 52 is an example of a screen including program content information by elapsed playback time that is presented after the content to be played is selected.

For example, after the content to be reproduced in FIG. 51 is selected, the detailed content display screen 5201 is displayed. The detailed content display screen 5201 includes a thumbnail image 5202, a program title 5203, an elapsed playback time 5204, program content information 5205 by elapsed playback time, and a jump playback button 5206. The thumbnail image 5202, the program title 5203, and the elapsed playback time 5204 are the same as those shown in FIG.

The program content information 5205 by reproduction elapsed time is presented based on the data defined in FIG. For example, when the watched time of the content indicated by the elapsed playback time 5204 is 20 minutes, the portion that has already been viewed among the four playback elapsed time program content information defined in FIG. 48B and FIG. (1) and (2) including are valid, and are presented as program content information 5205 by reproduction elapsed time. At this time, only the program content information 5205 (2) by playback elapsed time including the current playback elapsed time may be presented, or all the items that have been valid in the past, that is, both (1) and (2) are displayed. May be presented.

On the other hand, the program content information by playback elapsed time 5205 (3) (4), which is invalid because the playback elapsed time 5204 has not reached, is presented as, for example, “Not watched”, and the program content by playback elapsed time. The presence of information may be notified, or the item itself may not be presented because it is currently invalid.

The jump playback button 5206 has a function for playback from the start time of the corresponding program content information 5205 by elapsed playback time. For example, when the jump playback button 5206 corresponding to the program content information 5205 (2) by playback elapsed time is pressed, playback jumps to the 15-minute scene defined as the start point time 34401 and starts playback.

Although not shown in FIG. 52, a button for enabling playback from an unviewed part such as program content information 5205 (3) (4) by elapsed playback time may be provided. In addition, a position at which the previous playback is stopped may be recorded in a memory, and a button that enables playback from a position at which the previous playback was stopped (so-called resume playback) may be provided.

Note that the jump playback button 5206 may be a user interface that can select one from those included in the program content information 5205 by elapsed playback time, and is not particularly limited to the button shape.

According to the present embodiment, it is possible to present the appropriate program content information to the user by updating and presenting the program content information according to the elapsed playback time of the content, and support the user's promotion of understanding of the program content. be able to.

DESCRIPTION OF SYMBOLS 101 ... Content transmission apparatus 102 ... Data transmission apparatus 103 for defect complementation ... License management apparatus 104 ... Payment system / customer management system 105 ... Removable media 106 ... Receiving apparatus 107 ... Storage apparatus 108 ... Metadata transmission apparatus 201 ... Multimedia signal generation Unit 202... 13 segment format encoding unit 203... 3 segment format encoding unit 204... Concatenated frame configuration unit 205 .. reconcatenated frame configuration unit 206... Inverse fast Fourier transform (IFFT) / guard interval addition unit 207. ... Transmission amplifier unit 209 ... Antenna 211 ... RS (Reed-Solomon) encoding unit 212 ... Modulation / coding unit 213 ... Interleaving unit 214 ... Frame configuration unit 215 ... Hierarchy division unit 216 ... Hierarchy synthesis unit 221 ... RS Solomon) encoding unit 222 ... Modulation / encoding unit 223 ... Interleaving unit 224 ... Frame configuration unit 301 ... Content / metadata registration function 302 ... Metadata generation function 303 ... Metadata storage function 304 ... Content storage / playback function 305 ... Content encryption function 306 ... Recording medium 307 ... Multimedia signal generator 601 ... Input 602 ... Energy spreader 603 ... Delay corrector 604 ... Byte interleaver 605 ... Convolution encoder 606 ... Carrier modulator 607 ... Bit interleaver 608 ... Mapping unit 609 ... Output 701 ... Input 702 ... Pilot signal configuration unit 703 ... TMCC (Transmission and Multiplexing Configuration Control) signal configuration unit 704 ... AC (Auxiliary Channel) signal configuration unit 705 ... OFDM frame configuration unit 706 ... Output 1901 ... Antenna 1902 ... Channel selection unit 1 03 ... Orthogonal demodulation unit 1904 ... Fast Fourier transform (FFT) unit 1905 ... Demodulation decoding unit 1906 ... Synchronous reproduction unit 1907 ... Frame extraction unit 1908 ... TMCC decoding unit 1909 ... Demax unit 1910 ... Decoding unit 1911 for compressed broadcast audio signal ... Audio output unit 1912 ... Compressed broadcast video signal decoding unit 1913 ... Presentation processing unit 1914 ... Video output unit 1915 ... System decoding unit 1916 ... Rewritable non-volatile memory (NVRAM)
1917 ... ROM (Read Only Memory)
1918 ... RAM (Random Access Memory)
1919 Communication interface (I / F)
1920 ... Input / output unit (I / O)
1921 ... System bus 1922 ... Central processing unit (CPU)
1923 ... Remote control 1924 ... Front end (F / E)
1925 ... Back end (B / E) part 1926 ... Digital broadcast receiver 1927 ... Removable media 1928 ... Descramble part 1 1929 ... Descramble part 2 1930 ... CAS (Conditional Access System)
1931 ... Recording medium 2101 ... Input 2102 ... Carrier demodulation unit 2103 ... Deinterleaving unit 2104 ... Demapping unit 2105 ... Bit deinterleaving unit 2106 ... Depuncture unit 2107 ... Viterbi decoding unit 2108 ... Byte deinterleaving unit 2109 ... Energy despreading unit 2110 ... TS reproduction unit 2111 ... RS (Reed-Solomon) decoding unit 2112 ... Output 2121 ... Hierarchy division unit 2122 ... Hierarchy synthesis unit 2201 ... Input 2202 ... Carrier demodulation unit 2203 ... Deinterleaving unit 2204 ... Demapping unit 2205 ... Bit deinterleaving Unit 2206 ... depuncture unit 2207 ... Viterbi decoding unit 2208 ... byte deinterleaving unit 2209 ... energy despreading unit 2210 ... TS reproduction unit 2211 ... RS (Reed-Solomon) decoding unit 2212 ... output

Claims (12)

1. A transmission device that transmits content and metadata of the content,
   A transmission unit for transmitting content and metadata of the content;
   The transmission apparatus according to claim 1, wherein the metadata transmitted from the transmission unit includes a plurality of pieces of program content information corresponding to the elapsed playback time of the content transmitted from the transmission unit.
2. The transmission device according to claim 1,
   The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content A transmitter characterized by the above.
3. A receiving device that receives content and metadata of the content,
   A receiving unit for receiving content and metadata of the content;
   A playback unit for playing back the content received by the receiving unit;
   An output unit for outputting content reproduced by the reproduction unit,
   The metadata received by the receiving unit includes a plurality of program content information corresponding to the elapsed playback time of the content received by the receiving unit,
   A receiving apparatus that outputs program content information included in the metadata from the output unit based on an elapsed playback time of content to be played back by the playback unit.
4. The receiving device according to claim 3,
   The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
   The receiving apparatus that outputs program content information including an elapsed reproduction time of content to be reproduced by the reproduction unit within the associated period among the plurality of program content information from the output unit.
5. The receiving device according to claim 3,
   The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
   Among the plurality of program content information, the program content information including the elapsed playback time of the content to be played back by the playback unit within the associated period and the end time of the associated period of the content to be played back by the playback unit A receiving apparatus that outputs program content information before the elapsed playback time from the output unit.
6. The receiving device according to claim 3,
   A receiving apparatus that outputs a plurality of program content information included in the metadata from the output unit.
7. The receiving device according to claim 6,
   The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
   When one piece of program content information is selected from the plurality of pieces of program content information output from the output unit, the playback unit starts the period when the program information associated with the program content information is valid A receiving apparatus that reproduces content from:
8. A transmission / reception method in which content and metadata of the content are transmitted from a transmission device and received by a reception device,
   Transmitting content and metadata of the content from a transmission device;
   Receiving the transmitted content and metadata of the content at a receiving device;
   Playing the received content on the receiving device;
   Outputting the reproduced content at the receiving device,
   The metadata includes a plurality of program content information corresponding to the elapsed playback time of the content,
   A transmission / reception method characterized in that the reception device outputs program content information included in the metadata based on an elapsed reproduction time of content to be reproduced by the reception device.
9. The transmission / reception method according to claim 8,
   The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
   A transmission / reception method comprising: outputting, from the receiving device, program content information including elapsed playback time of content to be played back by the receiving device within the associated period of the plurality of program content information.
10. The transmission / reception method according to claim 8,
    The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
    Among the plurality of program content information, the program content information including the elapsed playback time of the content to be played back by the receiving device within the associated period and the end time of the associated period of the content to be played by the receiving device A transmission / reception method characterized in that program content information that is before the elapsed playback time is output from the receiving device.
11. The transmission / reception method according to claim 8,
    A receiving apparatus that outputs a plurality of program content information included in the metadata from the receiving apparatus.
12. The receiving device according to claim 11, comprising:
    The plurality of program content information corresponding to the elapsed playback time of the content included in the metadata is information in which the program content information is associated with the start time and end time of the period in which the program content information is valid in the content And
    When one piece of program content information is selected from a plurality of program content information output from the receiving device, the receiving device starts a period when the program information associated with the program content information is valid A content transmitting / receiving method comprising:

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