JP2000236273A - Device and method for digital signal reception - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly display receivable service, even when a digital broadcast signal is different in description from a PAT(program association table) and/or an EIT and an NIT(network information table). SOLUTION: Services described in an EIT are retrieved successively (step S101). It is determined whether or not a retrieved service is present in an NIT (step S102). When the retrieved service is present in the NIT, this service is added to a list (step S103), and otherwise, succeeding services are retrieved (step S101). After the step S103, it is decided whether or not the service is the last one among the services described in the EIT (step S104). When it is decided that the service is the final one in the EIT, the list generation is completed, and otherwise succeeding services are retrieved (step S101). An EPG is displayed according to the generated list.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal receiving apparatus and a receiving method used, for example, for receiving a CS digital broadcast and retransmitting the same via a digital cable broadcast.

[0002]

2. Description of the Related Art In a CS (Communication Satellite) digital broadcast signal or the like which provides services such as video, audio or text data, an NIT (Network Informa
The description of the service in the Action Table) relates only to the service that is actually being broadcast. Also,
For services described in the NIT but not in the PAT and / or EIT, STB (Set Top
Box) etc., it is treated as broadcast suspension.

[0003]

When a CS digital broadcast is received and retransmitted via a digital cable broadcast, a service described in the PAT and / or EIT but not in the NIT exists. There are cases. Such a state cannot be a CS digital broadcast, so that when the same processing as in the past is performed in an STB or the like, a malfunction or operation delay may occur.

Accordingly, an object of the present invention is to provide a digital signal receiving apparatus and a receiving apparatus capable of performing a normal operation even when a service described in the PAT and / or EIT but not in the NIT exists. It is to provide a method.

[0005]

According to a first aspect of the present invention, there is provided a first information table for describing a relationship between physical information on a transmission path and data that can be provided, and a description of data that can be provided. A digital broadcast signal having the following second information table:
The services described in the second information table are sequentially searched, and a list including only the services to be searched described in the first information table is created. A digital signal receiving apparatus for performing a predetermined process based on the digital signal.

According to a fifth aspect of the present invention, there is provided a first information table for describing a relationship between physical information on a transmission path and data that can be provided, and a second information table in which a description of data that can be provided is provided. And a search step for sequentially searching for services described in the second information table, and a description of the services searched in the search step described in the first information table. And a list creation step of creating a list in which only the described items are described, and performing a predetermined process based on the created list.

[0007] According to the invention as described above, of the services described in the information table such as PAT and / or EIT in which the description about the data that can be viewed is described, the physical information about the transmission path and the service are viewed. A list that describes only those described in an information table such as NIT that describes the relationship with the data to be generated is generated, and processing such as display of an EPG can be performed based on the list.

[0008]

FIG. 1 shows an example of a digital signal transmission system for receiving a CS digital broadcast and retransmitting it via a digital cable broadcast. The satellite 1 has a plurality of transponders (satellite repeaters). The antenna 2 receives digital broadcast signals transmitted from these transponders. The modulation conversion unit 3 is supplied with the digital broadcast signal received by the antenna 2, changes the transmission frequency and the modulation method of the supplied digital broadcast signal so as to be suitable for cable digital broadcasting or the like, and transmits the signal to the transmission line 4. . The transmission path 4 includes STBs 5 ₁ , 5 ₂ ,.
５, 5 _m are connected as receivers. STB5 ₁ ,
5 _2, ‥‥, to 5 _m, respectively, the monitor _61,
6 ₂ ,..., 6 _m are connected, and the image of the program number selected by each STB is displayed on each monitor.

The digital broadcast signal will be described. Here, a digital broadcast signal corresponding to a DVB (Digital Video Broadcasting) system as a digital broadcasting standard in Europe will be described as an example. MPEG
(Moving Picture Experts Group)
FIG. 2 shows an example of a signal format in a multimedia multiplexing method using S (Transpot Stream). The data of each media is PES (Packetized Elementary Strea
ms) A variable-length packet called a packet is configured. The PES packet is further divided into several transport stream packets (hereinafter, referred to as TS packets). The TS packet includes a header and a payload area.

The detailed structure of a TS packet conforming to the MPEG2 specification will be described with reference to FIG. One packet is composed of 188 bytes, of which the first 4 bytes, that is, 32 bits, are used as a packet header. One byte, that is, 8 bits, is set as a synchronization byte in the packet header, and the decoder detects the head of the TS packet based on the synchronization byte. As the pattern of the synchronization byte, for example, '47H' (H means hexadecimal) is used. One bit is used as a transport error indicator that indicates the presence or absence of an error in a TS packet. Also, a new PES packet is
One bit is used as a payload unit start indicator indicating that the packet starts with the S packet.

Also, one bit is used as a transport priority bit indicating the importance of the TS packet. Also, a PID (Packet) which is an identifier of the TS packet
13 bits are used as an Identifier. The identification number of the TS packet stored in the PID indicates the attribute of the individual stream of the packet, and includes the STB 5 ₁ to
At 5 _m or the like, the data of each medium is identified with reference to the PID. Also, a transport / traffic indicating whether or not the type of the payload of the TS packet is scrambled.
Two bits are used as scramble control information.

[0012] Also, as adaptation field control information indicating presence / absence of an adaptation field and presence / absence of a payload in the TS packet, 2
Bits are used. Also, 4 bits are used as continuity index information for detecting whether a packet having the same PID has been partially rejected on the way. Whether or not such a packet is discarded is detected based on the continuity of the 4-bit cyclic count information.

On the other hand, 184 bytes other than the packet header are used as the payload area. The payload area is used for storing, for each TS packet, data such as video data and audio data which are viewed by the user, or PSI (Program Specific Information: program specification information), SI (Service Information), and the like.

Next, FIG. 4 shows a frame configuration of digital broadcast data in the DVB system. FIG.
3 shows a PEG2 TS packet. FIG. 4B shows a state in which eight MPEG2 TS packets shown in FIG. 4A are collected to form one frame. Here, the data in each TS packet is Reed-Solomon.
, And one packet is made up of 204 bytes. The frame is synchronized by inverting the synchronization byte once every eight packets. For example, when “47H” is used as the synchronization byte, once every eight packets, the synchronization byte is “B8”.
H ′. Digital broadcast data as shown in FIG. 4B is modulated by QPSK (Quadrarure Phase Shift Keying).

Next, PSI will be described. The types of PSI include PAT (Program Association Table),
PMT (Program Map Table), NIT (Network Informa
tionTable). First, PAT is an information table in which unique contents are multiplexed for each carrier.
That is, the PAT describes channel information in each carrier and the PID of a PMT (which will be described later) indicating the content of each channel. PAT
FIG. 5 shows an example of the data configuration of the above. The table ID (8 bits) indicates the type of the table, and PAT is fixed to '0x0000'('0x' indicates hexadecimal notation). The section syntax indicator (1 bit) indicates whether the header of the section is a long form or a short form. Reserve (2
Bit) indicates a flag to be given meaning in the future.

The section length (12 bits) is from immediately after to the end of the section (CRC (Cyclic Redundant).
ancy code) (including the code, if any). The TSID (16 bits) is a transport stream (multiplexed coded data)
In the case of a satellite, it corresponds to a transponder. The version number (5 bits) indicates the PAT version, and the version number is updated each time the contents of the PAT are updated. The current next indicator (1 bit) indicates which version the PAT is when transmitting the new and old versions simultaneously.
The section number (8 bits) indicates the section number, and is set to “0x00” for the first section, and thereafter, is incremented by one. The last section number (8 bits) indicates the section number of the last section of the same subtable.

Further, the portions surrounded by double lines, that is, the program number (16 bits), the reserve (3 bits), the network PID (13 bits), and the program map (13 bits) are repeatedly written. The program number is a number for identifying each channel. For the network PID, the program number is '0x0000'
Indicates the PID of the subsequent NIT. program·
The map PID indicates a PID corresponding to the PMT (this will be described later). CRC is an error detection code for the entire section.

The PMT is an information table in which the contents of each channel are multiplexed. That is, the PI of a packet in which a stream of video data, audio data, additional data, etc. constituting each channel is transmitted.
D and ECM (Encription required for descrambling)
Control Message) packet PID is described. The PID of the PMT is specified by the PAT as described above. FIG. 6 shows an example of the PMT data configuration.
The description of the same data part as that included in the data structure of the PAT described above with reference to FIG. 5 will be omitted.
The table ID (8 bits) indicates the type of the table.
The table ID of the MT itself is set to “0x02”. A PCR (Program Clock Reference: a reference value of a time recognition means incorporated in a program) PID (13 bits) indicates a PID of a packet including a clock serving as a reference when decoding. Program information length (12
Bit) describes information common to this service in the immediately following loop. The descriptor is repeatedly written to describe information for each individual section to supplement the information of the section.

Further, the portions indicated by double lines are: stream type (8 bits), reserve (3 bits), elementary PID (13 bits), reserve (4 bits), ES information length (12 bits), and Descriptors are repeatedly written. Of these, the descriptor is repeated at each repetition. The program number is a number for identifying each channel.
The stream type indicates the type of signal, such as video, audio, and data, through which the stream is transmitted. The elementary PID indicates a PID of an elementary stream. The ES information length describes the information of the elementary stream in the immediately following loop.

The NIT is an information table in which information relating transmission line information to a broadcasted service is described. That is, in the NIT, a list of channels multiplexed on each carrier is described together with physical information for each carrier, for example, the orbit of the satellite, the polarization, the carrier frequency for each transponder, the convolution rate, and the like. . The PID of the NIT is '0x0010'.
Note that the PAT and PMT described above are MPEG
While the details of the data structure are specified in the two systems, only the necessity of the NIT is specified, and the data structure is private.

FIG. 7 shows an example of the data structure of the NIT.
The description of the same data portion in the data structure of the PAT and PMT described above with reference to FIGS. The table ID (8 bits) indicates the type of the table. The network concerned is '0x40', and the other networks are '0x41'. Network ID (16
Bit) identifies the network and, in the case of a satellite, corresponds to an individual satellite. The network descriptor length (13 bits) describes the common information of the network in the immediately following loop. The TS loop length is
The transport stream belonging to the network is listed in the loop immediately after. In addition, the TS descriptor length (12
Bit) is written. The TS descriptor length describes the information of the transport stream in the immediately following loop.

Next, the satellite delivery system descriptor will be described with reference to FIG. The satellite delivery system descriptor is
It is used as the first descriptor repeated according to the TS descriptor length (see FIG. 7), and forms a pair with the TSID. The descriptor tag (8 bits) is D
It is defined by VB and indicates the type of descriptor.
For the satellite delivery system descriptor, the descriptor tag is set to '0x43'. The descriptor length (8 bits) indicates the data length of the descriptor. The digital frequency (32 bits) indicates a transmission frequency for each stream (here, transponder). The orbit (16 bits) indicates the longitude of the orbital position of the satellite.

The west / east longitude flag (1 bit) indicates the east / west longitude of the orbital position of the satellite. Polarization (2 bits)
Indicates the polarization of the signal to be transmitted. For example, '00', '0
1 ',' 10 ', and' 11 'can correspond to a horizontal straight line, a vertical straight line, a left-handed circle, and a right-handed circle, respectively. Also,
Modulation (5 bits) indicates a modulation method. For example '00001'
Corresponds to QPSK. The symbol rate (23 bits) indicates the symbol rate. FEC (Forward Err
or Correction: Forward error correction (4 bits) indicates the convolution rate.

Next, the service list descriptor will be described with reference to FIG. Service list
The descriptor is the TS descriptor length (see Fig. 7)
And the ID of a service (channel) multiplexed on the stream (in this case, the transponder). That is, a service list,
Descriptors are included. The descriptor tag (8 bits) is defined by DVB and indicates the type of the descriptor. The descriptor tag for the service list descriptor is '0x41'.

The service ID (16 bits) identifies a service. Usually, the service matches the channel on which the viewer selects music. The service type indicates the content of a service such as video, audio, and data. That is, '0x01' corresponds to digital TV service, '0x02' corresponds to digital voice service, '0x03' corresponds to teletext service, '0x04' corresponds to NVOD basic service, etc., and also corresponds to user definition, reserve, etc. Code to be included.

Next, the cable delivery system
The descriptor will be described with reference to FIG. The description of the same data portion in the data configuration of the satellite delivery system descriptor described above with reference to FIG. 8 will be omitted. The descriptor tag is defined by DVB and indicates the type of the descriptor. The descriptor tag for the cable delivery system descriptor is “0x44”. The frequency (32 bits) indicates a transmission frequency for each stream in cable digital broadcasting (here, each channel in cable digital broadcasting).

The FEC (Forward Error Correction) outer code (4 bits) is an error correction code as an outer code. For example, when it is set to '0010', a Reed-Solomon code is used as the outer code. Indicates that
The modulation (8 bits) indicates a modulation method. For example, when "0x03" is set, it corresponds to 64QAM. The symbol rate (28 bits) indicates the symbol rate. The FEC inner code (4 bits) indicates a convolution rate.

The processing in the STBs 5 _{1 to} 5 _m for selectively decoding the data of the channel selected by the viewer will be described with reference to FIG. Here, STB
The processing in the 5 ₁ described as a representative example. Step S
As 1, the viewer enters the channel number "X" of the service to be viewed via the operation panel or the like provided on the STB 5 _1. The channel number input here corresponds to the program number on the PAT and PMT, and corresponds to the service ID on the NIT.
Then, the processing shifts to step S2, where STB5 ₁ sets NIT.
To receive. Further, the process proceeds to step S3 to determine whether or not the channel is present in the transponder currently being received. If it is determined in step S3 that the channel exists, the process proceeds to step S6; otherwise, the process proceeds to step S4.

In step S4, "X" is searched for the service ID in the service list descriptor of the NIT (see FIG. 9). In addition, the satellite delivery information combined before the service list descriptor including the searched service ID “X”.
After receiving the system descriptor (see FIG. 8),
Recognize the frequency of the transponder transmitting X ",
Move to step S5. In step S5, STB5
_{After 1} changes the receiving transponder, it receives the PAT and proceeds to step S6.

On the other hand, in step S6, STB5 ₁
Receives the PMT by referring to the program map PID attached to the program number “X” in the PAT, and proceeds to step S. In step S7, PM
In T, an elementary PID for each stream type (video, audio, etc.) corresponding to the program number "X" is recognized, a TS packet having a PID matching the recognized elementary PID is separated, and the process proceeds to step S8. Transition. In step S8, the separated packet is supplied to the video / audio decoder. Thereby, the video data, the audio data, and the like in the packet are decoded, and the viewer can view a desired service.
Similar to those described above processing is performed in the STB 5 ₂ to 5 _m.

Next, the SI will be described. SI is a section-type table storing information on channels, services, and the like. The type of SI is SDT
(Service Description Table), EIT (Event Informa
tion Table). The SDT stores channel information such as a channel number, a channel name, a channel description, and a channel logo. Also, E
The IT stores information related to services such as a channel number, a service number, a start time, a duration, a service name, a synopsis, a service genre, and a parental control age.

Based on such SI information, EPG (E
electronic Program Guide) is created. Monitor 6 for EPG with STB 5 ₁ , 5 ₂ , ‥‥, 5 _m
1, 6 _2, ‥‥, by being displayed on the 6 _m, the user is able to easily find the service to be viewed.

Normally, the service described in the NIT and the service described in the PAT, EIT, etc. coincide with each other. However, in CS digital broadcasting that has already been broadcast, only the NIT is described. PAT and / or E
There may be services that are not described in IT. FIG. 12 shows an example of such a case. The service described in NIT is as shown in FIG. 12A, and the service described in PAT and / or EIT is
B / 444c if as shown in FIG. 12C
h is described in NIT, but PA
It turns out that it is not described in T and / or EIT. In such cases, STB 5 ₁ to 5 _m is 444ch
Is suspended, and the fact is displayed on the EPG (see FIG. 13).

On the other hand, in digital cable broadcasting, C
When retransmitting the S digital broadcast, it may not be possible to receive all services in the CS digital broadcast. For example, when the satellite 1 includes L transponders and the number of digital broadcast signals in the satellite digital broadcast is M (M <L), the digital cable broadcast selectively selects the M digital broadcast signals. May be used for In such a case, the NIT is updated to delete information related to the service that is not retransmitted.

FIG. 14 shows an example of the configuration of the modulation conversion section 3 having the function of updating the NIT as described above. SHF transmitted from satellite 1 and supplied via antenna 2
(Super High Frequency) band digital broadcast signals are supplied to the signal processing units 30 ₁ , 30 ₂ ,..., 30 _m . The signal processing unit 30 ₁ to 30 _m is a signal to be supplied VHF (V
ery High Frequency) band or UHF (Ultra High Fr
equency) band digital cable broadcasting signals BS _{1 to} BS
Convert to _m . Control unit 31, signal processing unit 30 ₁ to 30
The operation of the entire apparatus is controlled by supplying a predetermined signal to _m . The operation unit 32, parameters and the like in accordance with control by the control unit 31, for example, the signal processing unit 30 ₁ to 30 _m is the configuration according to the setting of the reception frequency of the tuner to be built respectively. The display unit 33 displays the status of the device. The adder 34 is sent to the transmission path 4 by adding a cable digital broadcast signal BS ₁ to BS _m is the output of the signal processing unit 30 ₁ to 30 _m.

[0036] will be described in more detail the structure of the signal processing unit 30 _1. The signal supplied from the antenna 2 is supplied to the tuner 40. The tuner 40 selects a digital broadcast signal transmitted from the first transponder from the supplied signals, performs frequency conversion on the selected signal, generates a QPSK signal, and demodulates the QPSK signal. 41. The demodulator 41 demodulates the QPSK signal supplied from the output tuner 40 of the tuner 40,
The signal is converted into a DVB frame signal. The output of the demodulator 41 is supplied to an ECC (Error Correction Code) decoder 42.

The ECC decoder 42 generates an MPEG2 TS packet as digital broadcast data by subjecting the output of the demodulator 41 to error correction, and converts the generated MPEG2 TS packet into a NIT replacement circuit 43 and a NIT detection circuit 47. To supply. NIT detection circuit 47
Is the T of MPEG2 supplied from the ECC decoder 42.
From the S packet, NIT (hereinafter referred to as NIT0) in digital broadcast data output by the satellite 1 is detected. The detected NIT0 is supplied to the memory 48 and stored.

The control unit 31 reads NIT0 from the memory 48 via the interface 50 as necessary,
The information on the service in IT0 is updated to conform to the cable digital broadcasting, and is updated to NIT1. That is, the control unit 31 converts the satellite delivery system descriptor (see FIG. 8) in the NIT0 into the cable delivery system descriptor (see FIG. 10), and thereby updates the updated NIT (hereinafter, referred to as NIT0).
NIT1). NIT1 generated
Is supplied to and stored in the memory 49 via the interface 50. Further, the control unit 31 controls the reception frequency of the tuner 40 via the interface 50.

Here, when the number L of transponders of the satellite 1 is larger than the number M of channels of cable digital broadcasting and M digital broadcast signals are selectively used for cable digital broadcasting as described above, control is performed. Part 3
1 operates as follows. That is, a process such as deleting information related to the TSID corresponding to the digital broadcast signal not used in the cable digital broadcast, for example, the TSID and the contents of the descriptor in FIG.
To NT1.

The NIT replacement circuit 43 includes an ECC decoder 4
NIT0 in the TS packet supplied from
9 is replaced with NIT1 read from
The MPEG2 TS packet generated by such processing is supplied to the ECC encoder 44. Where NIT
The replacement circuit 43 performs processing such as inserting a dummy bit at a location where the information related to the TSID is deleted.

The ECC encoder 44 adds a Reed-Solomon error correction code to the output of the NIT replacement circuit 43, and further converts the output into a DVB frame configuration. EC
The output of the C encoder 44 is supplied to a modulator 45. The modulator 45 applies 64 QAM (Qua) to the supplied signal.
Modulation is performed by drature Amplitude Modulation). The output of the modulator 45 is supplied to a frequency converter 46. The frequency converter 46 outputs the output of the modulator 45 to the VHS band or UHF band.
By converting the transmission output at a predetermined frequency band, and generates a signal BS _1. Signal BS ₁ is supplied to the adder 34.

[0042] As the configuration of the signal processing unit 30 ₂ to 30 _m, it can be used after removing the NIT detection circuit 47, a memory 48 and memory 49 from the configuration of the signal processing unit 30 ₁ described above. The signal processing unit 30 ₂ to 30 _m is
Digital broadcast signals corresponding to the second to m-th transponders are respectively selected from the output of the antenna 2, and NIT1
Is read from the memory 49 as necessary,
Perform IT replacement, and use BSs with different transmission frequencies
_{2 to} BS _m are supplied to the adder 34.

By the above-described processing, the NIT is rewritten according to the conditions of retransmission, etc., but PAT / PIT
For PAT in the TS packet received from satellite 1
/ PIT is used as is. Therefore, there is a service that is not described in the NIT but is described only in the PAT and / or the EIT. If it does not clarify the handling of such services, STB5 ₁ ~5
_A problem may occur in the operation of _m . For example, the processing speed may be reduced. Also,
As described above with reference to FIG. 11, only services retrieved from the services described in the NIT can be provided to the viewer. Therefore, providing services not described in the NIT to the viewer is difficult. Can not. Therefore, E
When an EPG is displayed based on IT, there is a possibility that a display related to a service that cannot be provided to a viewer is displayed and confusion is caused.

Therefore, according to the present invention, when a service not described in the NIT but described only in the PAT and / or the EIT exists, the STBs 5 _{1 to} 5 _m, etc.
By performing processing such as EPG display by giving priority to the description of the IT, display related to the service described only in the PAT and / or EIT is not performed, and the station is not selected.

The operation of the embodiment of the present invention for realizing the above-described processing will be described with reference to the flowchart of FIG. In step S101, the services described in the EIT are sequentially searched. Then, the process proceeds to step S102, and it is determined whether the service found in step S101 exists in the NIT. If it is determined that the service exists in the NIT, the process proceeds to step S103; otherwise, the process proceeds to step S101 and the subsequent E
Search for the service described in IT1. Step S1
In 03, the service is added to the list. further,
The process proceeds to step S104, and it is determined whether the service is the last one of the services described in the EIT. If it is determined that the service is the last service in the EIT, the list creation ends. Otherwise, the process moves to step S101 to search for a service described in the subsequent EIT1.

In the list generated as described above, only the service described in the NIT is described. By displaying the EPG based on such a list, it is possible to prevent services described only in the PAT and / or EIT from being displayed on the EPG. FIG. 16 and FIG. 1 show such an EPG display.
This will be described with reference to FIG. A comparison between the service in the NIT shown in FIG. 16A and the service in the PAT and / or EIT shown in FIG. 16B / FIG. 16C reveals the following.

Although the service relating to 444ch is described in the NIT, it is not described in the PAT and / or the EIT.

The service related to 555ch is described in PAT and / or EIT, but is not described in NIT.

In this case, the EPG created and displayed by the method described above with reference to FIG. 15 and the like is as shown in FIG. Here, reflecting the situation, 55
5ch is not displayed on the EPG. That is, a channel that is not described in the NIT but is described only in the PAT and / or the EIT is not displayed on the EPG.

Reflecting this situation, it is determined that 444 ch is suspended and the fact is displayed on the EPG as in the example described above with reference to FIGS.

The above-described embodiment of the present invention is an application of the present invention to digital cable broadcasting for re-transmitting CS digital broadcasting signals. However, the present invention relates to digital BS broadcasting signals and digital terrestrial broadcasting signals. The present invention can be applied to digital cable broadcasting for retransmission.

The present invention is not limited to the above-described embodiments and the like, and various modifications and applications are possible without departing from the gist of the present invention.

[0053]

According to the present invention, a PAT and / or an EI that describes data that can be viewed.
Among the services described in the information table such as T, a list in which only those described in an information table such as NIT that describes a relationship between physical information on a transmission path and data to be viewed is described. Is generated, and processing such as display of the EPG is performed based on the list.

For this reason, it is possible to clarify the handling of services described in PAT and / or EIT, but not described in NIT or the like.

Therefore, it is possible to prevent the occurrence of a trouble caused by the existence of a service which is described in PAT and / or EIT, but is not described in NIT or the like. For example, it is possible to prevent malfunctions such as displaying a service that is not described in the NIT or the like and thus cannot be provided in practice, and an operation delay of the STB, and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an example of a digital signal transmission system that receives a CS digital broadcast and retransmits the same via a digital cable broadcast.

FIG. 2 is a schematic diagram for explaining a multimedia multiplexing method using an MPEG2 TS.

FIG. 3 is a schematic diagram for explaining an MPEG2 TS packet of FIG. 2;

FIG. 4 is a schematic diagram illustrating a frame configuration of a DVB system.

FIG. 5 is a schematic diagram for explaining a PAT.

FIG. 6 is a schematic diagram for explaining a PMT.

FIG. 7 is a schematic diagram for explaining NIT.

FIG. 8 is a schematic diagram for describing a satellite delivery system descriptor.

FIG. 9 is a schematic diagram illustrating a service list descriptor.

FIG. 10 is a schematic diagram illustrating a cable delivery system descriptor.

FIG. 11 is a flowchart for describing an example of an operation in the STB.

FIG. 12: PAT and / or E described in NIT
FIG. 9 is a schematic diagram illustrating an example of a case where a service not described in IT exists.

FIG. 13 is a schematic diagram illustrating an example of an EPG displayed in the case of FIG. 12;

FIG. 14 is a block diagram illustrating an example of a configuration of a modulation conversion unit.

FIG. 15 is a flowchart illustrating a process according to an embodiment of the present invention.

FIG. 16 describes a PAT and / or EIT,
FIG. 14 is a schematic diagram illustrating an example of a case where a service not described in NIT exists.

FIG. 17 is a schematic diagram illustrating an example of an EPG displayed based on a result of the process illustrated in FIG. 16;

[Explanation of symbols]

3 ... modulation conversion unit, 5 ₁ ~5 _m ··· STB

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hirofumi Yuchi 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo F-term in Sony Corporation (reference) 5C025 BA27 CB09 DA01 DA04 DA05 5C056 FA02 FA05 FA11 HA01 5K061 AA04 BB06 BB10 BB17 DD12 FF12 JJ07

Claims (5)

[Claims] A first information table that describes a relationship between physical information about a transmission path and data that can be provided;
In a receiving apparatus for receiving a digital broadcast signal having a second information table in which a description relating to data that can be provided is provided, services sequentially described in the second information table are sequentially searched. A digital signal receiving apparatus for generating a list in which only the information described in the first information table is described, and performing a predetermined process based on the generated list. 2. The digital signal receiving device according to claim 1, wherein the predetermined process is a process of displaying contents of a service that can be provided to a viewer. 3. The digital signal receiving device according to claim 1, wherein the digital broadcast signal is a CS digital broadcast signal, and the first information table is NIT. 4. The digital broadcast signal according to claim 1, wherein the digital broadcast signal is a CS digital broadcast signal, and the second information table is a PAT and / or an EI.
T. A digital signal receiving device. 5. A first information table describing a relationship between physical information on a transmission path and data that can be provided,
In a receiving method for receiving a digital broadcast signal having a second information table in which a description of data that can be provided is provided, a search step of sequentially searching for a service described in the second information table; A list creation step of creating a list in which only the services described in the first information table among the services searched by the first information table are described,
A digital signal receiving method, wherein a predetermined process is performed based on the created list.