JPH10257404A - Digital broadcast receiver and processing method for received digital broadcast signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time from the selection of any other program by a user during program reproduction to the reproduction of that program and to improve operability by providing the plural sets of tuner parts and demultiplexer parts and simultaneously analyzing program information contained in bit streams to be inputted to the respective tuner parts. SOLUTION: On the assumption that the user selects the 2nd program during the reproduction of 1st program, when the 2nd program is not described in 1st common program information PAT stored in a program information storage part 70d, an arithmetic control part 70c confirms whether the 2nd program is described in 1st and 2nd common program information stored in the program information storage part 70d or not. When it is described, an arithmetic controller 70 transmits an instruction for extracting 2nd peculiar program information to a 2nd demultiplexer part 16. Afterwards, the 2nd program information separated through a procedure similar to conventional one by the 2nd demultiplexer part 16 is outputted through a decoder part 6 onto a display device 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus for receiving and reproducing digital video and audio broadcasts, and a method of processing a digital broadcast received signal. TECHNICAL FIELD The present invention relates to a device configuration for improving operability when selecting a device and a method of processing a received signal.

[0002]

2. Description of the Related Art FIG.
FIG. 494 is an internal block diagram showing a conventional digital broadcast receiving device shown in No. 494. In the figure, 1 is a conventional digital broadcast receiving apparatus, 2 is an external input signal (that is, a digital broadcast signal) externally input to the digital broadcast receiving apparatus 1, 3 is a first tuner section that receives the external input signal 2, 4 is a first program group including at least one or more programs, a first common program information related to the first program group, and a first unique program information related to the first program group. , A first demultiplexer unit for separating and extracting a first program, first common program information, and first unique program information from the first bit stream 4, and 6 a first demultiplexer unit. A decoder section for reproducing the first program extracted by the demultiplexer section 5 into a video signal or an audio signal; 7 a conventional arithmetic / control device for controlling their functions; 8 a control bus of the arithmetic / control device 7; 9 is moni It is a display device, such as chromatography and speakers. Reference numeral 10 denotes an instruction for selecting an arbitrary (ie, desired) program by the user.
It is an input device used for transmitting to the control device 7.
The first tuner unit 3 and the first demultiplexer unit 5 can transmit information to the arithmetic and control unit 7 via the control bus 8 and can receive commands from the arithmetic and control unit 7 on the contrary. .

FIG. 12 shows, as an example of the first bit stream 4, a transport stream structure of an MPEG (Moving Picture Experts Group) -2 system specified by ISO / IEC13818-1. In the figure, reference numeral 11a denotes a transport stream 18
An 8-byte fixed-length transport packet, 11b is a PID for identifying the transport packet 11a.
(Packet Identification), 11c is a payload which is an area for storing data such as compressed digital video.

FIGS. 13 and 14 show examples of the first common program information and the first unique program information which are mapped to the payload 11c and transmitted. FIG. 13 shows the ISO / IEC13
P of the MPEG-2 system specified by 818-1
This is the structure of an AT (Program Association Table). In the figure, 12a is a table identifier, 12b is a broadcast program number identifier, and 12c is a program map PID indicating a PMT PID described later. Further, FIG.
This is a structure of a PMT (Program Map Table) of the MPEG-2 system defined by IEC13818-1. In the figure, 13a is a table identifier, 13b is a stream format identifier, and 13c is an elementary PID indicating which transport packet 11a is transmitting video and audio data.

Next, a specific operation (ie, processing of a received signal) will be described. FIG. 15 is a flowchart showing a procedure of a conventional digital broadcast receiving apparatus for extracting an arbitrary first program and a signal processing procedure. In such a conventional digital broadcast receiving apparatus, first, an external input signal 2 is input to the digital broadcast receiving apparatus 1 from a coaxial cable, a satellite broadcast receiving antenna, or the like. The external input signal 2 is, for example, 27 in the case of digital satellite broadcasting.
A signal having a transmission rate of about 40 megabits per second per MHz bandwidth. Normally, the external input signal 2 is composed of a plurality of bit streams, and an arbitrary bit stream can be extracted by controlling the first tuner unit 3. Here, it is assumed that the external input signal 2 is composed of a first bit stream and a second bit stream.

From this state, the user transmits a command for receiving a desired first program to the arithmetic / control device 7 using the input device 10. (Step 100 in FIG. 15) Next, the arithmetic and control unit 7 controls the first tuner unit 3 receiving the external input signal 2 to extract the first bit stream 4. (Step 101 in FIG. 15) Here, the first bit stream 4 includes at least one or more first programs, at least one or more first common program information, and at least one or more first unique program information. Is assumed to be a digital bit stream including The process up to the extraction of the first bit stream 4 is defined as a first procedure.

FIG. 12 shows an example of the first bit stream 4, which has a transport stream structure of an MPEG-2 system defined by ISO / IEC13818-1. The transport stream is first composed of a transport packet 11 having a fixed length of 188 bytes.
a and is identified by the PID 11b. When the first bit stream 4 is input, the first demultiplexer unit 5 checks the PID 11b of each transport packet 11a transmitted and searches for a transport packet 11a having a value of 0. (Step 102 in FIG. 15)

The payload 11c of the transport packet 11a in which the value of the PID 11b is 0 is shown in FIG.
The first common program information shared in the first bit stream 4 as indicated by 3 is stored. First
Demultiplexer unit 5 extracts the first common program information detected by the above procedure. The first common program information is taken into the arithmetic and control unit 7 via the control bus 8 and analyzed. (Step 103 in FIG. 15) If the program selected by the user at this stage is not included in the first bit stream 4, the process returns to the first procedure and the process is performed again from extraction of the bit stream. (Step 104 in FIG. 15) The procedure up to this point is referred to as a second procedure.

FIG. 13 shows an example of the first common program information.
Here, the PAT (Program Associate) of the MPEG-2 system defined by ISO / IEC13818-1
ionTable) structure. The PAT is a common program information table in which only one bit stream is normally transmitted. In FIG. 13, a table identifier 12a indicates that this structure is PAT, a broadcast program number identifier 12b indicates an identification number allocated to each program, and a program map PID 12c is a program map PID 12c unique to each program. 1 unique program information PMT (Program Map
Table) of the transport packet 11a transmitting the
ID 11b is shown.

Generally, in a digital broadcast, a plurality of programs exist in one bit stream, so that it is difficult to transmit all program information using only one common program information table. Therefore, it is often the case that the program information is divided and transmitted as common and unique program information. The arithmetic and control unit 7 extracts a transport packet 11a for transmitting first unique program information corresponding to an arbitrary first program specified by the user based on the analyzed first common program information. The instruction is transmitted to the first demultiplexer unit 5 via the control bus 8. (Step 1 in FIG. 15)
05) The procedure so far is referred to as a third procedure.

The first demultiplexer 5 receiving the instruction
Checks the PID 11b of each transport packet 11a transmitted from the first bit stream 4 and transmits first unique program information corresponding to an arbitrary first program specified by the user. A transport packet 11a whose value matches the PID 11b of the transport packet 11a to be transmitted is searched. (Step 106 in FIG. 15) Transport packet 1 in which the value of PID 11b matches
The first unique program information as shown in FIG. 14 is stored in the payload 11c of 1a. The procedure so far is referred to as a fourth procedure.

FIG. 14 shows an example of the first unique program information.
Here, the PMT structure of the MPEG-2 system defined by ISO / IEC13818-1 is assumed.
PMT is a program information table in which only one program is normally transmitted for one program. In FIG. 14, a table identifier 13a indicates that this structure is PMT, a stream format identifier 13b indicates a format of a data stream of a program, and an elementary PID 13c indicates a transport packet for transmitting each program component. The PID 11b for identifying the PID 11a is shown. The first unique program information is extracted by the first demultiplexer unit 5 and taken into the arithmetic and control unit 7 via the control bus 8. The arithmetic and control unit 7 issues, via the control bus 8, an instruction to extract a transport packet 11 a for transmitting an arbitrary first program specified by the user based on the first unique program information. 1 to the demultiplexer unit 5.
(Step 107 in FIG. 15) The procedure up to this point is referred to as a fifth procedure.

The first demultiplexer unit 5 receiving the instruction
Examines the PID 11b of each transport packet 11a transmitted from the first bit stream 4, and then determines the transport packet 11a for transmitting any first program component specified by the user. PID1
The transport packet 11a whose value matches 1b is searched. (Step 108 in FIG. 15) In general, there are a plurality of PIDs 11b of the transport packet 11a transmitting the first program, such as normal video data and audio data. The payload 11c of the transport packet 11a having the same PID 11b includes, for example, a video signal encoded according to the MPEG-2 video format defined by ISO / IEC13818-2 or an MP defined by ISO / IEC11072-3.
The first demultiplexer unit 5 stores the components of a first program including an audio signal encoded according to the EG-1 audio format or the like, and transmits the components to a decoder unit 6 so that the video signal or the audio signal is transmitted. Play to signal. (Step 109 in FIG. 15) The procedure up to here is the sixth procedure.

According to the above first to sixth procedures,
After being reproduced as a video signal or an audio signal, it is output to a display device 9 such as a video monitor or a speaker, and provided to a user. It also monitors whether the user has transmitted a command to select a new program using the input device 10 to the arithmetic and control unit 7 (step 110 in FIG. 15). , The first extracted and analyzed
It is determined whether or not the program is included in the currently extracted first bit stream 4 based on the common program information PAT. (Step 111 in FIG. 15) If a new program is included in the first bit stream 4 currently being extracted, the third and subsequent steps need only be repeated. It returns to the procedure of 1 and repeats again from extraction of a new bit stream.

[0015]

Since the conventional digital broadcast receiving apparatus is configured as described above, any new program selected by the user is different from the first bit stream 4 currently being extracted. If it is included in the bit stream, the first tuner unit 3 is controlled to start the extraction of a new bit stream.
It is necessary to start over from the above procedure. Since the first common program information and the first unique program information are usually transmitted only several times per second, a time lag of several tens to several hundreds of milliseconds may occur depending on the timing of starting the procedure. .

In this case, it takes one second or more (that is, a time lag) from the time when the user selects an arbitrary program to the time when the program is actually reproduced. There were problems such as lowering. In general, it is said that if a time lag of 0.5 seconds or more occurs between the time when a user selects an arbitrary program and the time when the program is displayed, the user feels stress on operability. After the user selects an arbitrary new program, the first tuner unit 3 starts extracting a new bit stream. However, there is a problem that a blank time zone in which no reproduced video or audio can be provided occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a time from when a user selects an arbitrary program to when the program is actually reproduced. It is an object of the present invention to realize a digital broadcast receiving apparatus and a digital broadcast received signal processing method capable of shortening (time lag) and improving operability. Further, a second object of the present invention is to provide a method for, when a user again selects a program reproduced immediately before a currently reproduced program, a time period until the previously reproduced program is reproduced again. It is an object of the present invention to realize a digital broadcast receiving apparatus and a digital broadcast received signal processing method capable of shortening the time and improving the operability. Further, a third object of the present invention is to provide a method in which, when a bit stream including an arbitrary program to be selected next by a user can be predicted in advance, the user selects an arbitrary program and then reproduces the program. It is an object of the present invention to realize a digital broadcast receiving apparatus and a digital broadcast received signal processing method capable of shortening the time until the operation is completed and improving operability.

A fourth object of the present invention is to reproduce the immediately preceding program from when the user selects an arbitrary program to when the program is actually reproduced, and nothing is reproduced. It is an object of the present invention to realize a digital broadcast receiving apparatus and a digital broadcast received signal processing method that do not generate a blank time. A fifth object of the present invention is to extract program information from a bit stream dedicated to program information sent from a broadcasting station, so that a user selects an arbitrary program and then reproduces the program. It is an object of the present invention to realize a digital broadcast receiving apparatus and a digital broadcast received signal processing method capable of shortening the time until the operation is completed and improving operability.

[0019]

A digital broadcast receiving apparatus according to the present invention receives a digital broadcast signal composed of a plurality of bit streams and reproduces a desired program contained in the plurality of bit streams. A plurality of sets of a tuner section and a demultiplexer section are provided. Upon selection, a desired program is extracted and reproduced based on program information that has been analyzed in advance.

Further, the digital broadcast receiving apparatus according to the present invention transmits, from a received digital broadcast signal composed of a plurality of bit streams, a first program group composed of at least one or more programs and information relating thereto. A first tuner section for extracting a first bit stream including first program information, and a first demultiplexer for extracting a first program group and first program information from the first bit stream And a second bit stream including, from a received digital broadcast signal, a second program group including at least one or more programs and second program information for transmitting information related to the second program group Second to extract
, A second demultiplexer for extracting the second program group and the second program information from the second bit stream, and decoding the extracted first and second program groups to obtain a video Or, a decoder section for reproducing an audio signal, an input device capable of transmitting a command for a user to select a desired program, and simultaneously analyzing the extracted first and second program information, When the user selects the second program in the second program group from the input device during reproduction of the first program in the first program group, the second And an arithmetic and control device for extracting the second program and reproducing it.

Further, the arithmetic and control device of the digital broadcast receiving apparatus according to the present invention controls the first tuner section and the first demultiplexer section or the second tuner section and the second demultiplexer section to control the first tuner section and the second demultiplexer section. The first program information and the first program or the second program information and the second program are extracted, and the first program information and the first
Of the unused tuner section and the first demultiplexer section or the second tuner section and the second demultiplexer section to control the program information relating to the program that the user has just reproduced. Both or one of the programs is extracted in advance, and when the user transmits an instruction to select again the program that has been reproduced immediately before from the input device, the program relating to the program that has been reproduced immediately before is extracted. Using program information and / or programs,
The program reproduced immediately before is extracted and reproduced.

Further, the arithmetic and control unit of the digital broadcast receiving apparatus according to the present invention extracts the second program using the previously extracted second program information, and reproduces the second program while reproducing the second program. A third bit stream is extracted by using a first tuner section and the first demultiplexer section, and further, third program information and a third program are extracted.

In the digital broadcast receiving apparatus according to the present invention, output signals from the first demultiplexer and the second demultiplexer are input, and either one of the signals is selected and output to the decoder. The arithmetic / control device includes a decoder input switching device, and the user operates the input / output device to reproduce the first program information and the first program in the second program group while reproducing the first program in the first program. When a command to select the second program is transmitted, the second tuner unit and the second demultiplexer unit are used to extract the second program information and the second program and shift to a state in which the second program can be reproduced. Until the first program, the first program is continuously reproduced using the first tuner unit and the first demultiplexer unit.

Further, the digital broadcast receiving apparatus according to the present invention extracts a first bit stream including a program group composed of at least one or more programs from a received digital broadcast signal composed of a plurality of bit streams. A first tuner section, a first demultiplexer section for extracting a group of programs from the first bit stream, and a second section for constantly extracting a second bit stream including program information from the received digital broadcast signal. Tuner part,
A second demultiplexer for extracting program information from the second bit stream, a decoder for decoding a program group extracted by the first demultiplexer and reproducing a video or audio signal; An input device capable of transmitting a command to select a desired program, and the extracted program information are analyzed. When a user selects a different program from the input device during reproduction of the program, the input device is And an arithmetic and control unit for extracting a selected program based on the common program information and reproducing the selected program.

Further, in the method of processing a digital broadcast reception signal according to the present invention, when a program of a digital broadcast signal composed of a plurality of bit streams is received, a plurality of sets of a tuner section and a demultiplexer section are used, The program information included in the bit stream is simultaneously analyzed, and when a user selects a program, a desired program is extracted based on the program information analyzed in advance.

Further, in the method of processing a digital broadcast reception signal according to the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one set of a tuner section and a demultiplexer section is used.
The tuner section and the demultiplexer section of one set are used for extracting the program currently being reproduced and its program information, and at the same time, the tuner section and the demultiplexer section of at least one other set are used for extracting the program reproduced immediately before. When the user selects again the program that was being reproduced immediately before, the program that was reproduced immediately before the extraction was continued is reproduced.

Further, in the method of processing a digital broadcast reception signal according to the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one set of a tuner section and a demultiplexer section is used.
While playing the first program using the set of tuner and demultiplexer sections, the other at least one set of tuner and demultiplexer sections is used to select the program that the user is expected to select next. A bit stream and its program information are analyzed, and when a desired program is selected, a program is extracted based on the program information that has been analyzed and stored in advance.

Further, in the method of processing a digital broadcast reception signal according to the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used, and at least one
When the second program is selected and reproduced from the state where the first program is reproduced using the tuner unit and the demultiplexer unit of the set, the extraction of the second program ends and the second program is Until the reproduction becomes possible, the first program is continuously reproduced.

In the method for processing a digital broadcast reception signal according to the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one set of a tuner section and a demultiplexer section is used.
A set of tuners and a demultiplexer are used to always extract program information from a program information-dedicated bit stream, and based on the program information, at least one other set of tuners and a demultiplexer is used. hand,
A desired program is extracted.

[0030]

An embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals as those in the related art indicate the same or equivalent parts as those in the related art. Embodiment 1 FIG. FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 1 of the present invention.
In the figure, 100 is a digital broadcast receiving apparatus, 2 is an external input signal (that is, a digital broadcast signal) externally input to the digital broadcast receiving apparatus 100, 3 is a first tuner unit that receives the external input signal 2, 4 is At least one
A first bit stream including a first program group composed of one or more programs, first common program information related to the first program group, and first unique program information related to the first program group; Reference numeral 5 denotes a first demultiplexer for separating and extracting the first program, the first common program information, and the first unique program information from the first bit stream 4.

Reference numeral 14 denotes a second tuner unit for receiving the external input signal 2, and reference numeral 15 denotes a second tuner including at least one or more second program groups and second program information relating to the programs.
, 16 is the second bit stream 1
5 is a second demultiplexer unit for extracting a second program and second program information from the fifth program. Reference numeral 6 denotes a decoder for reproducing the first and second programs extracted by the first demultiplexer 5 and the second demultiplexer 16 into video signals and audio signals, and 9 denotes a display device such as a monitor or a speaker. is there. Reference numeral 10 denotes an input device used for transmitting a command for selecting an arbitrary program by the user to the arithmetic and control device 70.

Here, 70 is a CPU (Central Processi).
ng Unit) and its peripheral devices
A control device 70a monitors an instruction input by the user using the input device 10, receives an instruction, and analyzes the content thereof. 70b controls the first demultiplexer unit 5 and the like. A peripheral interface unit for controlling via the bus 8 and receiving information from them via the control bus 8; 70c, an operation / control unit for analyzing, storing and calculating information; 70d, common program information and unique program A program information storage unit capable of storing and analyzing the content of information, and is configured here as a part of the calculation / control unit 70c.

The external input signal 2 (ie, the digital broadcast signal to be received) is composed of the first bit stream 4 and the second bit stream 4.
It is assumed that the second bit stream 15 includes a program group different from the first bit stream 4 and program information relating to the program. The second tuner unit 14 and the second demultiplexer unit can transmit information to the arithmetic and control unit 70 via the control bus 8 and can receive commands from the arithmetic and control unit 70 on the contrary.

In the digital broadcast receiving apparatus according to the first embodiment configured as described above, two different bit streams transmitted by the external input signal 2, that is, the first bit stream 4 and the second bit stream 15 can be simultaneously extracted by the first tuner unit 3 and the second tuner unit 14, respectively. Although the first bit stream 4 and the second bit stream 15 contain different first and second common program information and unique program information, respectively, the first demultiplexer unit 5 and the second It is possible to simultaneously extract each of them with the demultiplexer unit 16. Therefore, the arithmetic and control unit 70 controls the first and second units via the control bus 8.
The common program information and the unique program information can be captured and analyzed at the same time.

Here, it is assumed that the user selects an arbitrary second program during the reproduction of the first program, and the second program is included in a bit stream different from the first program. FIG.
5 is a flowchart illustrating an example of an operation and a signal processing procedure of the digital broadcast receiving apparatus according to the first embodiment of the present invention. In the drawing, steps 101a to 111a and steps 101b to 111b perform the same operations as the steps 101 to 111 in FIG. 15 of the conventional example. The first tuner unit 3 receives the external input signal 2
, A first bit stream 4 is extracted from the first bit stream 4, and the first bit stream 4 includes first common program information, first unique program information, and a first program. Here, similarly to the conventional example, the first common program information is the PA-2 of MPEG-2.
Transmitted in a T structure, and the first specific program information is MPEG-2
Is transmitted in the PMT structure of

The arithmetic and control unit 70 analyzes the first common program information PAT extracted by the first demultiplexer unit 5, and based on the analysis result, obtains the first unique program information PMT.
Is extracted again using the first demultiplexer unit 5. The arithmetic and control unit 70 analyzes the first unique program information PMT extracted by the first demultiplexer unit 5 and, based on the analysis result, converts the first program from the first bit stream 4 into the first program again. It is assumed that the data is extracted using the demultiplexer unit 5 and transmitted to the decoder unit 6 for reproduction. Necessary information in the first common program information PAT and the first unique program information PMT is stored in a program information storage unit 70d in the arithmetic and control unit 70c. The operation up to this point is the same as the conventional first to sixth procedures.

In the first embodiment of the present invention, after the sixth procedure, the second common program information is analyzed in advance. (Step 112a in FIG. 2) During the reproduction of the first program, the second tuner unit 14 extracts the second bit stream 15 in advance.
(Step 101b in FIG. 2) The second bit stream 15 includes second common program information, second unique program information, and a second program. Second
When the second bit stream 15 is input, the demultiplexer 16 checks the PID 11b of each transport packet 11a transmitted and searches for a transport packet 11a having a value of 0 (see FIG. 2). Step 102b) of the second data stored in the payload 11c, for example, transmitted in the PAT structure of MPEG-2.
Is extracted.

The second demultiplexer 16 is provided with a second common program information PAT extracted by the peripheral interface 70b of the arithmetic and control unit 70 via the control bus 8.
give. The peripheral interface unit 70b converts the received second common program information PAT into the arithmetic / control device 7
0 to the operation / control unit 70c.
Of the second common program information PAT
Necessary information is stored from among. As described above, the arithmetic and control unit 70 fetches and analyzes the second common program information PAT. (Step 103b in FIG. 2)

The input command processing unit 70a of the arithmetic and control unit 70 constantly monitors whether or not the user has transmitted a command to select a new program using the input device 10. (Step 110a in FIG. 2) When an instruction from the user to select a new program is detected, the instruction information is transmitted to the arithmetic and control unit 70c. The arithmetic and control unit 70c first determines whether or not the program is included in the currently extracted first bit stream 4 based on the first common program information PAT already stored in the program information storage unit 70d. Judge. (Step 111a in FIG. 2) If it is included, the third and subsequent steps are repeated.

Next, during reproduction of the first program, the user
Is transmitted to the digital broadcast receiving apparatus. The second program is the arithmetic and control unit 70
If the first program information is not described in the first common program information PAT stored in the program information storage unit 70d, the arithmetic and control unit 70c determines that the second program is currently being extracted by the first tuner unit 3 It is determined that the bit stream is not included in the bit stream 4. (Step 111a in FIG. 2) Next, the calculation / control unit 70c in the calculation / control device 70
Similarly to the third procedure, the second program is stored in the program information storage section 70d.
Is confirmed in the second common program information PAT stored in the. (Step 104 in FIG. 2)
b) When the second program is described in the second common program information, the arithmetic and control unit 70 sends an instruction to extract the second program according to the content to the second demultiplexer unit 16 to the peripheral. The data is transmitted from the interface unit 70b via the control bus 8. (Step 105b in FIG. 2)

The second demultiplexer unit 1 receiving the instruction
6 is the second bit stream 1 similar to the fourth procedure.
For example, the second unique program information transmitted in the MPEG-2 PMT structure is extracted from the number 5. (Step 106b in FIG. 2) Next, the arithmetic and control unit 70 executes the second
Of the unique program information PMT is analyzed. The second demultiplexer unit 16 outputs the second extracted signal to the peripheral interface unit 70b of the arithmetic and control unit 70 via the control bus 8.
Is passed. The peripheral interface unit 70b receives the second unique program information PMT
Is transmitted to the arithmetic and control unit 70c of the arithmetic and control unit 70, and the program information storage unit 70d in the arithmetic and control unit 70c stores necessary information from the second unique program information PMT. (Step 107b in FIG. 2)

Further, the second demultiplexer section 16
As in the sixth procedure, the second program is extracted from the second bit stream 15. (Step 108 in FIG. 2)
b) The second separated by the second demultiplexer unit 16
Is sent to the decoder unit 6 and reproduced as a video signal or an audio signal, and then output to a display device 9 such as a video monitor or a speaker. (Step 109b in FIG. 2) Similarly, in preparation for the user to select the next new program, the first common program information PMT is extracted in advance during the reproduction of the second program, and the program information storage unit 70d To memorize it. (Step 112b in FIG. 2)

As described above, when the user's instruction to reproduce the second program is transmitted to the digital broadcast receiving apparatus, the extraction of the second bit stream 15 and the extraction of the second common program information are performed, and the contents are analyzed. Since it is stored in advance, the operation may be performed after the third procedure, that is, after the extraction of the second unique program information. Therefore, according to the first embodiment of the present invention, it is possible to reduce the time required from when a user selects a program to when the program is actually reproduced, thereby improving the operability of the digital broadcast receiving apparatus. Can be improved.

Embodiment 2 FIG. 3 is a block diagram showing a configuration of a digital broadcast receiving apparatus 101 according to the second embodiment. The basic configuration is the same as that of the first embodiment.
The operation of the arithmetic and control unit is different. In the figure, 71 is C
Embodiment 2 constituted by PU and its peripheral devices, etc.
An operation / control device 71a monitors an instruction input by the user using the input device 10, receives an instruction, and analyzes the content thereof. An input instruction processing unit 71b controls the first demultiplexer unit 5 and the like. A peripheral interface unit for controlling via the bus 8 and receiving information from them via the control bus 8, an operation / control unit 71 c for analyzing, storing and operating information, and 71 d for common program information and unique program A program information storage unit capable of storing and analyzing the contents of information, and is configured here as a part of the calculation / control unit 71c. The configuration of the bit stream, the programs included therein, and common / unique program information is the same as in the first embodiment.

FIG. 4 is a flowchart showing an example of the operation of the digital broadcast receiving apparatus according to the second embodiment and the procedure of signal processing. Steps 101a to 111a, 101
From b to 111b and from 101c to 111c, operations equivalent to the steps from 101 to 111 in FIG. 15 of the conventional example are performed. When the user selects the first program, the arithmetic and control unit 71 first sets the first tuner unit 3
The first bit stream 4 is extracted by the first demultiplexer unit 5 (step 101a in FIG. 4).
After extracting and analyzing the common program information PAT (steps 102a and 103a in FIG. 4), it is determined whether or not the first program is included in the first bit stream 4. (FIG. 4
Step 104a)

If the first program is included in the first bit stream 4, based on the first common program information PAT (step 105a in FIG. 4), the first unique program information PM
Extract and analyze T (Steps 106a and 107 in FIG. 4)
a) Further, the first demultiplexer unit 5 and the decoder unit 6 extract and reproduce the first program based on the first unique program information PMT. (Steps 108a, 10 in FIG.
9a) The input command processing unit 71a in the arithmetic and control unit 71 monitors whether the user has selected a new program. (Step 110a in FIG. 4)

When the user transmits an instruction to reproduce the second program to the digital broadcast receiving apparatus during the reproduction of the first program, the operation and control unit 71c in the operation and control unit 71
Determines whether the program is included in the same stream as the currently playing program. (Step 111a in FIG. 4) If not included, it is determined whether or not the program has been reproduced until immediately before. (Step 113a in FIG. 4) Here, since the user has changed the program for the first time, this is not the case. Therefore, the arithmetic / control unit 71c sends the second tuner unit 14 and the second demultiplexer unit 1 from the peripheral interface unit 71b via the control bus 8.
6 after extracting the second bit stream 15 (step 101b in FIG. 4) and extracting and analyzing the second common program information PMT (steps 102b and 103 in FIG. 4).
b) determining whether the second program is included in the second bit stream 15; (Step 104 in FIG. 4)
b)

The second program is the second bit stream 15
Are included in the second unique program information PM based on the second common program information PAT (step 105b in FIG. 4).
Extract and analyze T. (Steps 106b and 10 in FIG. 4)
7b) Further, a second program is extracted by the second demultiplexer 16 based on the second unique program information PMT (FIG. 4).
In step 108b), the data is transmitted to the decoder unit 6 and reproduced. (Step 109b in FIG. 4)

While the reproduction of the second program is continued, the operation
The input command processing unit 71a in the control device 71 monitors whether the user has transmitted a command to select a new program. (Step 110b in FIG. 4) The first common program information PAT used until immediately before is stored in the program information storage unit 71d in the arithmetic and control unit 71.
And the first unique program information PMT are stored, the first tuner unit 3 continues to extract the first bit stream 4, and the first demultiplexer unit 5 has been selected by the user immediately before. It is assumed that the extraction of the first program is continued.
(Step 108a in FIG. 4) However, in the second embodiment of the present invention, the decoder 6
Since only one is prepared, the extracted first program is discarded without being reproduced.

Here, when the user transmits a command to select a new program different from the program currently being reproduced using the input device 10 (step 110b in FIG. 4),
The control device 71 determines whether or not the program is included in the same second bit stream 14 as the currently reproduced program. (Step 111b in FIG. 4) If the program is included in the same second bit stream 14 as the currently reproduced program, the process returns to step 105b, where the second tuner unit 14 and the second demultiplexer unit 16 The program is extracted again based on the second common program information PAT stored in the program information storage unit 71d. If the program is not included in the same second bit stream 14 as the program currently being reproduced, then the arithmetic and control unit 71 determines whether or not it is the program selected immediately before. (Step 113b in FIG. 4)

If the program selected by the user is not the first program reproduced immediately before, the process returns to step 105a, where the program information is extracted by the first tuner unit 3 and the first demultiplexer unit 5, and the program information is extracted. The program is extracted from the first bit stream 4 based on the first common program information PAT stored in the storage unit 71d. In the second embodiment of the present invention, the external input signal 2 is composed of the first bit stream and the second bit stream, but when the external input signal 2 is composed of three or more bit streams, , Step 101a or step 101b
And the process may be performed again from the extraction of the bit stream.

On the other hand, when the program selected by the user is the first program reproduced immediately before, that is, the program which is being continuously extracted by the first tuner unit 3 and the first demultiplexer unit 5, The arithmetic and control unit 71c performs step 10
8a, the first program extracted by the first tuner unit 3 and the first demultiplexer unit 5 is decoded by the decoder unit 6
Is controlled via the control bus 8 so as to be transmitted to and reproduced from the control bus. While the reproduction of the first program is continued, the input command processing unit 71a in the arithmetic and control unit 71 monitors again whether the user has transmitted a command to select a new program.
(Step 110a in FIG. 4) The program information storage unit 71d in the arithmetic and control unit 71 stores the second common program information PAT used until immediately before.
And the second specific program information PMT are stored, the second tuner section 14 continues extracting the second bit stream 15, and the second demultiplexer section 16 has been selected by the user immediately before. The extraction of the second program is continuing. When the user again selects the second program reproduced immediately before, the same operation as described above is repeated.

As described above, according to the second embodiment of the present invention, when the user selects again the program that has been reproduced immediately before, the time required to reproduce the program desired by the user is reduced. be able to. In actual use, the frequency at which the user selects a program that reselects the program reproduced immediately before is relatively high, so that the operability of the digital broadcast receiving apparatus is improved.

Embodiment 3 FIG. In the first or second embodiment, the external input signal 2 is composed of two different digital bit streams, a first bit stream and a second bit stream. That is, since the number of pairs of the tuner and the demultiplexer is prepared in advance equal to the number of bit streams constituting the external input signal 2, the operability of the digital broadcast receiving apparatus can be relatively easily improved. However, in an actual digital satellite broadcast or the like, the external input signal 2 is often composed of more bit streams.
Here, for example, the external input signal 2 is composed of three different digital bit streams, first, second and third bit streams, and only two sets of the tuner section and the demultiplexer section are prepared. Consider the case.

FIG. 5 is a block diagram showing a configuration of a digital broadcast receiving apparatus 102 according to the second embodiment. The basic configuration is the same as that of the first or second embodiment, but the operation of the arithmetic and control unit is different. different. In the figure, 72 is CP
The operation / control device 72a according to the third embodiment, which is constituted by U and its peripheral devices, 72a monitors an instruction input by the user using the input device 10, receives the instruction, and analyzes the content thereof. A unit 72b controls the first demultiplexer unit 5 and the like via the control bus 8, and a peripheral interface unit which receives information from the control unit via the control bus 8, and 72c manages analysis, storage and calculation of information. The calculation / control section 72d is a program information storage section capable of storing and analyzing the contents of the common program information and the unique program information, and is constituted here as a part of the calculation / control section 72c. .

FIG. 6 is a flowchart showing the operation and signal processing procedure of digital broadcast receiving apparatus 102 according to the third embodiment. In the figure, steps 101a to 1
11a, 101b to 111b and 101c to 11
1c, reference numerals 101 to 111 in FIG.
Perform the same operation as the steps up to. When the user selects the first program, the arithmetic and control unit 72 first causes the first tuner unit 3 and the first demultiplexer unit 5 to
The first bit stream 4 is extracted (step 1 in FIG. 6).
01a), after extracting and analyzing the first common program information PAT (steps 102a and 103a in FIG. 6), it is determined whether or not the first program is included in the first bit stream 4. (Step 104a in FIG. 6)

If the first program is included in the first bit stream 4, based on the first common program information PAT (step 105a in FIG. 6), the first unique program information PM
Extract and analyze T. (Steps 106a and 10a in FIG. 6)
7a) Further, the first demultiplexer unit 5 and the decoder unit 6 extract and reproduce the first program based on the first unique program information PMT. (Steps 108a, 10a in FIG. 6)
9a) The input command processing unit 72a in the arithmetic and control unit 72 monitors whether the user has selected a new program. (Step 110a in FIG. 6)

While the first program is being reproduced, the second tuner section 14 and the second demultiplexer section 16 extract and analyze the second common program information PAT from the first bit stream 15 in advance. Calculation and control device 7
2 is stored in the program information storage unit 72d. (Step 112a in FIG. 6) When the input command processing unit 72a in the arithmetic and control unit 72 that monitors whether the user has transmitted a command to select a new program detects the command, the new program is displayed. If it is included in the first bit stream 4 currently being extracted,
Returning to step 105a, the process is performed again from the extraction and analysis of the first unique program information. (Step 111a in FIG. 6)

If the new program is not included in the currently extracted first bit stream 4, the new program is stored in the second bit stream based on the second common program information PAT extracted in advance. It is determined whether it is included in the stream 15. (Step 104b in FIG. 6) When the program is included in the second bit stream 15, the program is reproduced according to the same procedure as the procedure for reproducing the first program. (Steps 105b to 109b in FIG. 6) When the new program is not included in the second bit stream 15, the operation / control unit 72 in the operation / control device 72 is used.
c promptly starts extracting the third bit stream (step 101c in FIG. 6) and returns to the third common program information PA.
The tuner and the demultiplexer are controlled via the control bus 8 from the peripheral interface unit 72b so as to start extraction and analysis of T. (Step 10 in FIG. 6)
2c, 103c)

For the extraction of the third bit stream and the extraction of the third common program information PAT, the first tuner unit 3 and the first demultiplexer unit 5 or the second tuner unit 14 and the second demultiplexer unit are used. Any set of the unit 16 may be used. After extracting the third common program information, the arithmetic and control unit 72 determines whether or not the new program is included in the third bit stream. Thereafter, the same operation as described above is repeated until a stream including the program is found.

As described above, according to the third embodiment of the present invention, when a stream including a program to be selected next by the user can be predicted in advance, the time from the selection of the program to the reproduction thereof is set. It becomes possible to shorten. On the other hand, if the stream including the program selected by the user next cannot be predicted, no effect can be obtained. However, in the actual use of digital broadcast receivers, the stream containing the program to be selected next can be predicted in many cases, such as when the program is forwarded, and the operability of the digital broadcast receiver is generally improved. Can be done.

Further, in the third embodiment, before the user selects a new program, only the extraction of the stream to be predicted and the common program information are performed. However, the program selected by the user next can be predicted. In such a case, operability of the digital broadcast receiving apparatus can be further improved by starting extraction of a program that is already predicted before selecting a new program. In the third embodiment, only one piece of program common information PAT included in one certain bit stream is extracted before the user selects a new program. Therefore, before a user selects a new program, a certain bit stream and the program common information PAT included therein
Is extracted, and the extracted program common information PAT is stored in the program information storage unit 72b in the arithmetic and control unit 72. Subsequently, different bit streams and the program common information PA
T is extracted, and the program common information PAT is stored in the program information storage unit 72.
The program common information PAT of a plurality of bit streams is stored by repeating the procedure of storing the program in a plurality of bit streams, and based on the information, it is possible to determine which bit stream contains a new program selected by the user. Even if the determination is made, it is possible to reduce the time from when the user selects the program to when it is reproduced, and it is possible to obtain a digital broadcast receiving apparatus or a received signal processing method with good operability.

Embodiment 4 FIG. 7 is a block diagram showing a configuration of a digital broadcast receiving apparatus 103 according to the fourth embodiment. In the figure, reference numeral 73 denotes an arithmetic and control unit according to the fourth embodiment, which includes a CPU and its peripheral devices. The basic configuration is the same as that of the arithmetic and control units according to the first to third embodiments. Perform the operation. 73a
Is an input command processing unit that monitors a command input by the user using the input device 10, receives the command, and analyzes the content of the command. 73b controls the first demultiplexer unit 5 and the like via the control bus 8. A peripheral interface unit for receiving information from them via a control bus 8;
3c is an arithmetic and control unit 7 for analyzing, storing, and operating information.
A program information storage unit 3c is capable of storing and analyzing the contents of common program information and unique program information, and is configured as a part of the calculation / control unit 73c here.
Reference numeral 17 denotes a decoder input switching device for selecting one of the outputs of the first demultiplexer unit 5 and the second demultiplexer unit 16 for the input to the decoder unit 6. It is controlled by the device 73.

Next, the operation will be described. FIG. 8 is a flowchart showing an example of the operation and signal processing procedure of the digital broadcast receiving apparatus according to the fourth embodiment. In steps 101a to 111a, 101b to 111b, and 101c to 111c, operations equivalent to the steps 101 to 111 in FIG. 15 of the conventional example are performed.
When the user selects the first program, the arithmetic and control unit 7
First, the first tuner unit 3 and the first demultiplexer unit 5 extract the first bit stream 4 (step 101a in FIG. 8), and the first common program information PA
After extracting and analyzing T (steps 102a,
3a), it is determined whether the first program is included in the first bit stream 4. (Step 104 in FIG. 8)
a)

If the first program is included in the first bit stream 4, the first unique program information PM is determined based on the first common program information PAT (step 105a in FIG. 8).
Extract and analyze T. (Steps 106a and 10a in FIG. 8)
7a) Further, the first program is extracted by the first demultiplexer unit 5 and the decoder unit 6 based on the first unique program information PMT. (Step 108a in FIG. 8) The arithmetic and control unit 73 switches the decoder input via the control bus 8 so that the first program is input to the decoder unit 6 after the extraction of the first program is started. The device 17 is controlled. (Step 114a in FIG. 8) The decoder unit 6 reproduces the input first program into a video signal and an audio signal, and transmits the same to the display device 9 for display. (Step 109a in FIG. 8) The input command processing unit 73a in the arithmetic and control unit 73 monitors whether the user has selected a new program. (Step 110a in FIG. 8)

When the user transmits a command to reproduce the second program by using the input device 10 during the reproduction of the first program, the operation and control device is continued while the reproduction of the first program is continued. The calculation / control section 73c in 73 first refers to the first program common information PAT to determine whether or not the second program is included in the same first bit stream 4 as the currently reproduced program. . (Step 111a in FIG. 8) If not included in the same stream, the arithmetic / control unit 73c
Controls the second tuner unit 14 and the second demultiplexer unit 16 from the peripheral interface unit 73b via the control bus 8, and controls the second bit stream 1
5 (step 101b in FIG. 8), and the second
After extracting the common program information PAT (step 1 in FIG. 8)
02b, 103b), it is determined whether the second program is included in the second bit stream 15. (Step 104b in FIG. 8)

The second program is the second bit stream 15
, The calculation / control section 73c calculates the second common program information PAT based on the second common program information PAT (step 105b in FIG. 8).
Control is performed so as to extract the second unique program information PMT. (Steps 106b and 107b in FIG. 8) Further, the calculation / control section 73c sets the second unique program information PM
Based on T, the second demultiplexer 16 is controlled so as to extract the second program. (Step 108 in FIG. 8)
b) After the extraction of the second program is started, the arithmetic / control section 73c sends the decoder input switching device 17 via the control bus 8 from the peripheral interface 73b so that the second program is input to the decoder section 6. Control. (Step 114b in FIG. 8)

As described above, the first program is input to the decoder unit 6 until the extraction of the second program is started, and the second program is sent to the decoder unit 6 after the extraction of the second program is started. , The first program can be provided to the user until the second program can be reproduced.
Therefore, a blank time during a program extraction preparation period during which a program cannot be provided to the user can be eliminated, so that a digital broadcast receiving device with good operability can be obtained.

Embodiment 5 FIG. 9 is a block diagram showing a configuration of digital broadcast receiving apparatus 104 according to the fifth embodiment. In the figure, reference numeral 74 denotes an arithmetic and control unit according to the fifth embodiment, which comprises a CPU and its peripheral devices. The basic configuration is the same as that of the arithmetic and control units according to the first to fourth embodiments. Perform the operation.

An input command processing unit 74a monitors a command input by the user using the input device 10, receives the command, and analyzes the content of the command. A reference numeral 74b controls the first demultiplexer unit 5 and the like via the control bus 8. Control via the control bus 8
A peripheral interface unit 74c for receiving information from them via an interface 74c is an operation / control unit 74c which manages the analysis, storage and operation of the information, and stores and analyzes the contents of the common program information and the unique program information. A possible program information storage unit, which is configured here as a part of the calculation / control unit 74c. 18 is a tuner section dedicated to program information,
Reference numeral 19 denotes a bit stream dedicated to program information prepared in advance on the broadcast station side, and reference numeral 20 denotes a demultiplexer dedicated to program information. The output of the demultiplexer dedicated to program information 20 is not input to the decoder 6.

Next, the operation will be described. FIG. 10 is a flowchart showing an example of an operation of the digital broadcast receiving apparatus according to the fifth embodiment and a procedure of signal processing. When the user selects the first program, the arithmetic / control device 74
A program selection command is received via the input command processing unit 74a. (Step 100 in FIG. 10) The arithmetic and control unit 74 controls the tuner unit 18 dedicated to program information from the peripheral interface unit 74b via the control bus 8, and controls the tuner unit 18 dedicated to program information prepared in advance on the digital broadcast station. Extract the bit stream of. (Step 115 in FIG. 10)

Further, the arithmetic / control device 74 controls the demultiplexer section 20 dedicated to program information from the peripheral interface section 74b via the control bus 8, and extracts program common information PAT corresponding to all bit streams. (Step 102 in FIG. 10) Since the bit stream 19 dedicated to program information is not used for transmitting program elements, it is possible to transmit program common information PAT having a sufficient information amount. The arithmetic and control unit 74 analyzes necessary information in the extracted program common information PAT, and stores the program information storage unit 7 in the arithmetic and control unit 74c.
4d. (Step 116 in FIG. 10)

The arithmetic and control unit 74 controls the first tuner unit 3 and the first demultiplexer unit 5 to extract the first bit stream 4 (step 1 in FIG. 10).
01) Extract first unique program information PMT corresponding to the program selected by the user based on the common program information PAT stored in the program information storage unit 74d. (Steps 105 and 106 in FIG. 10) Further, a first program element is extracted by the first demultiplexer unit 5 and the decoder unit 6 based on the first unique program information PMT. (Steps 107 and 10 in FIG. 10)
8) The extracted program elements are input to the decoder unit 6, reproduced into video signals and audio signals, transmitted to the display device 9, and displayed. (Step 109 in FIG. 10) The input command processing unit 74a in the arithmetic and control unit 74 monitors whether the user has selected a new program. (Step 110 in FIG. 10)

When a command for selecting a new program by the user is transmitted from the input command processing unit 74a to the arithmetic and control unit 74, the arithmetic and control unit 74 reads the common program information stored in the program information storage unit 74d. Extraction of a new program is started based on the PAT. If the new program is included in the same first bit stream 4, the unique program information P of the new program
The MT is performed again from the extraction. If a new program is not included in the same first bit stream 4, the extraction must be performed again from the extraction of the new bit stream. However, since the extraction of the common program information PAT has already been completed, the time required for program extraction is shorter. Can be shortened. As a result, according to the fifth embodiment of the present invention, it is possible to reduce the time required from when a user selects a program to when the program is actually reproduced, thereby improving the operability of the digital broadcast receiving apparatus. Can be improved.

More specifically, factors that determine the time from when the user selects an arbitrary program to when the program is actually reproduced include the time required for tuning the bit stream, header detection, and the like. There are a time required for demultiplexing, a time for acquiring two tables such as common program information and unique program information, and a time required for decoding. Of these, the two tables which occupy the largest weight are acquired. It is the time required. Even if the transmission frequency of each program information table is five times per second, an acquisition time of about 400 milliseconds at the worst is required. However, by omitting the acquisition time of the common program information, it is possible to reduce the acquisition time of the table to about 200 milliseconds, and it is necessary to select the program and reproduce it even if other factors are considered. The time can be suppressed to within about 500 milliseconds, and there is an effect that a digital broadcast receiving apparatus with good operability in actual use can be obtained.

In the fifth embodiment, the common program information PAT is provided in the bit stream 19 dedicated to program information, and the unique program information PM is stored in the first bit stream 4.
T, but a bit stream 19 dedicated to program information
May be configured to have both.

In the fifth embodiment, the bit stream 19 dedicated to the program information is started after the user first selects some program, but before the user first selects any program. For example, the extraction of the bit stream 19 dedicated to the program information may be started immediately after the power of the digital broadcast receiving apparatus is turned on.

[0078]

According to the digital broadcast receiving apparatus of the present invention, a plurality of sets of a tuner section and a demultiplexer section are provided so that program information contained in a bit stream input to each tuner section can be simultaneously analyzed. When the user selects a program different from the program currently being reproduced, a desired program is extracted and reproduced based on the program information which has been analyzed in advance. It is possible to reduce the time (time lag) required from when a program is selected to when the program is actually reproduced, and it is possible to provide a digital broadcast receiving apparatus with improved operability.

Further, according to the digital broadcast receiving apparatus of the present invention, the first program group including at least one or more programs and the first program information for transmitting information related thereto is provided. A first tuner unit for extracting a first bit stream, a first demultiplexer unit for extracting a first program group and first program information from the first bit stream, and at least one or more programs. A second tuner section for extracting a second bit stream including a second program group to be transmitted and second program information for transmitting information about the second program group; and a second tuner section for extracting a second bit stream from the second bit stream. Extracting a second program group and second program information
Demultiplexer unit, a decoder unit for decoding the extracted first and second program groups to reproduce a video or audio signal, and an input capable of transmitting a command for a user to select a desired program The apparatus and the extracted first and second program information are simultaneously analyzed, and the user is allowed to input the second program in the second program group from the input device while reproducing the first program in the first program group.
When you select a program, the second
And a calculation / control device for extracting the second program based on the program information of the second program and reproducing the second program. It is possible to reduce the time required until the second program is reproduced, and it is possible to provide a digital broadcast receiving apparatus with improved operability.

According to the digital broadcast receiving apparatus of the present invention, the arithmetic and control unit includes a first tuner section and a first demultiplexer section or a second tuner section and a second demultiplexer section. Controlling the first program information and the first program or the second program information and the second program information;
In which either the first tuner unit and the first demultiplexer unit or the second tuner unit and the second demultiplexer unit are not used while the video or audio is being reproduced while the program is being extracted. , And beforehand the program information and / or one or both of the programs relating to the program which was reproduced immediately before by the user are extracted, and a command to select again the program which was reproduced immediately before by the user from the input device. At the time of transmission, the previously reproduced program was extracted and reproduced using both or one of the program information and the program relating to the previously reproduced program which was previously extracted. Therefore, when the user selects the program that was being reproduced immediately before, the time until the reproduction can be shortened, and a digital broadcast receiving apparatus with improved operability is provided. There is an effect that can be.

According to the digital broadcast receiving apparatus of the present invention, the arithmetic and control unit extracts and reproduces the second program using the second program information extracted in advance. In this state, a third bit stream is extracted by using the first tuner and the first demultiplexer, and third program information and a third program are further extracted. When a bit stream to be reproduced next and a program can be predicted while the program is being reproduced, the next program can be promptly extracted by extracting program information of the next predicted bit stream in advance. This makes it possible to provide a digital broadcast receiving apparatus with improved operability.

Further, according to the digital broadcast receiving apparatus of the present invention, the output signals from the first demultiplexer section and the second demultiplexer section are inputted, and either one of the signals is selected and sent to the decoder section. A decoder input switching device for outputting the data;
When the user transmits an instruction to select a second program in the second program group from the input device while reproducing the first program in the first program and the first program in the first program, the second The first tuner section and the first demultiplexer are used until the second program information and the second program are extracted using the tuner section and the second demultiplexer section and the state is shifted to a reproducible state. Since the first program is continuously reproduced by using the section, it is possible to prevent a blank time during which the program cannot be provided to the user at the time of switching the program reproduction, thereby improving the operability. There is an effect that a digital broadcast receiver can be provided.

Further, according to the digital broadcast receiving apparatus of the present invention, the first tuner section for extracting the first bit stream including the program group composed of at least one or more programs, A first demultiplexer unit for extracting a program group from the bit stream, a second tuner unit for constantly extracting a second bit stream including program information, and a second detuner unit for extracting program information from the second bit stream A demultiplexer unit, a decoder unit for decoding a program group extracted by the first demultiplexer unit and reproducing a video or audio signal, and a user capable of transmitting a command for selecting a desired program. An input device;
In addition to analyzing the extracted program information, when the user selects a different program from the input device during the reproduction of the program, the selected program is extracted based on the previously analyzed program information and reproduced. Operation and control device that constantly extracts the program information from the second bit stream dedicated to the transmission of the program information, so that the next program to be selected can be quickly extracted, thereby improving operability. There is an effect that a digital broadcast receiving apparatus can be provided.

Further, according to the digital broadcast reception signal processing method of the present invention, when a program of a digital broadcast signal composed of a plurality of bit streams is received, a plurality of sets of a tuner section and a demultiplexer section are used and input. Program information contained in different bit streams, and when a user selects a program, a desired program is extracted based on the program information analyzed in advance. Has the effect that the time required from when another desired program is selected until the program is actually reproduced can be reduced.

Further, according to the digital broadcast reception signal processing method of the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one tuner section and a demultiplexer section are used. The pair of tuner section and demultiplexer section is used for extracting the program currently being reproduced and its program information, and at least one other pair of tuner section and demultiplexer section is used for extracting the program being reproduced immediately before. When used for extraction, if the user selects the program that was playing immediately before, the program that was playing immediately before the extraction was continued is played back. When the selection is made again, there is an effect that the time until the reproduction can be reduced.

Further, according to the digital broadcast reception signal processing method of the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one tuner section and a demultiplexer section are used. While playing the first program using the tuner and demultiplexer set, the user is expected to select the next program using at least one other tuner and demultiplexer set. A bit stream including an arbitrary program to be performed and its program information are analyzed, and when a desired program is selected, the program is extracted based on the program information that has been analyzed and stored in advance. If a bit stream to be reproduced next and the program can be predicted while the program is being reproduced, the next predicted bit By extracting the program information of the stream, there is an effect that it is possible to quickly extract the next program.

Further, according to the digital broadcast reception signal processing method of the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one tuner and a demultiplexer are used. When the second program is selected and reproduced from the state in which the first program is reproduced using the tuner section and the demultiplexer section of the set, the extraction of the second program ends and the second program is completed. Since the first program is continuously reproduced until the program can be reproduced, there is an effect that it is possible to prevent a blank time during which the program cannot be provided to the user at the time of switching the program reproduction.

According to the method for processing a digital broadcast reception signal according to the present invention, at the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, at least one tuner and a demultiplexer are used. A set of tuners and a demultiplexer are used to always extract program information from a program information-dedicated bit stream, and based on the program information, at least one other set of tuners and a demultiplexer is used. Thus, since a desired program is extracted, there is an effect that a program selected next can be quickly extracted by constantly extracting program information from the second bit stream dedicated to program information transmission.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to a first embodiment.

FIG. 2 is a flowchart showing an operation and a signal processing procedure of the digital broadcast receiving apparatus according to the first embodiment.

FIG. 3 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to a second embodiment.

FIG. 4 is a flowchart showing an operation and a signal processing procedure of the digital broadcast receiving apparatus according to the second embodiment.

FIG. 5 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to a third embodiment.

FIG. 6 is a flowchart showing an operation of the digital broadcast receiving apparatus according to the third embodiment and a procedure of signal processing.

FIG. 7 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to a fourth embodiment.

FIG. 8 is a flowchart showing an operation and a signal processing procedure of the digital broadcast receiving apparatus according to the fourth embodiment.

FIG. 9 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to a fifth embodiment.

FIG. 10 is a flowchart showing an operation and a signal processing procedure of the digital broadcast receiving apparatus according to the fifth embodiment.

FIG. 11 is a configuration block diagram of a conventional digital broadcast receiving device.

FIG. 12 is a bit stream structure diagram of an MPEG-2 system specified by ISO / IEC13818-1.

FIG. 13 is a structural diagram showing common program information of the MPEG-2 system specified by ISO / IEC13818-1.

FIG. 14 is a structural diagram showing unique program information of the MPEG-2 system specified by ISO / IEC13818-1.

FIG. 15 is a flowchart showing the operation of a conventional digital broadcast receiving apparatus and the procedure of signal processing.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 conventional digital broadcast receiving device 2 external input signal (digital broadcast signal) 3 first tuner unit 4 first bit stream 5 first demultiplexer unit 6 decoder unit 7 conventional arithmetic / control unit 8 control bus 9 display Device 10 Input device 11a Transport packet 11b PI
D 11c Payload 12a PA
T table identifier 12b PAT broadcast program number identifier 12c PAT program map PID 13a PMT table identifier 13b PMT stream format identifier 13c PMT elementary PID 14 second tuner unit 15 second bit stream 16 second Demultiplexer unit 17 Decoder input switching device 18 Tuner unit dedicated to program information 19 Bit stream dedicated to program information 20 Demultiplexer unit dedicated to program information 70 Arithmetic / control unit in the first embodiment 71 Arithmetic / control unit in the second embodiment 72 Arithmetic / Control Device in Embodiment 3 73 Arithmetic / Control Device in Embodiment 4 74 Arithmetic / Control Device in Embodiment 5 100 Digital Broadcast Receiving Device According to Embodiment 1 101 According to Embodiment 2 Digital broadcasting receiver 102 embodiment 3 digital broadcast receiver according to Embodiment 5 of the digital broadcast receiving apparatus 104 performed by the digital broadcast receiving apparatus 103 according to the fourth embodiment by

Claims (11)

[Claims] 1. A digital broadcast receiving apparatus for receiving a digital broadcast signal composed of a plurality of bit streams and reproducing a desired program included in the plurality of bit streams, comprising: It is possible to simultaneously analyze the program information included in the bit stream input to each tuner unit, and when the user selects a program different from the currently playing program, based on the previously analyzed program information A digital broadcast receiving apparatus configured to extract and reproduce a desired program. 2. A received digital broadcast signal comprising a plurality of bit streams, a first program group including at least one or more programs and a first program information including first program information for transmitting information relating thereto. A first tuner unit for extracting one bit stream; a first demultiplexer unit for extracting the first program group and the first program information from the first bit stream; A second program including a second program group including at least one or more programs and second program information transmitting information related to the second program group from a broadcast signal.
A second tuner unit that extracts the bit stream of the second program, a second demultiplexer unit that extracts the second program group and the second program information from the second bit stream, A decoder unit for decoding the first and second program groups to reproduce a video or audio signal; an input device capable of transmitting a command for a user to select a desired program; Analyzing the second program information simultaneously and selecting a second program in the second program group from the input device while reproducing the first program in the first program group; A digital broadcast receiving apparatus comprising: an arithmetic and control device for extracting the second program based on the second program information analyzed in advance and reproducing the second program. 3. The arithmetic and control device controls a first tuner section and a first demultiplexer section or a second tuner section and a second demultiplexer section to control the first program information and the first program. Alternatively, the second tuner section and the first demultiplexer section or the second tuner section and the second program information are extracted while reproducing the video or audio while extracting the second program information and the second program. 2 by controlling the unused set of the demultiplexer unit to extract in advance the program information and / or one or both of the programs related to the program reproduced immediately before the user. When transmitting a command to select the program reproduced immediately before, the program information and / or one or both of the program information and the program relating to the program reproduced immediately before that have been extracted in advance are transmitted. 3. The method according to claim 2, wherein a program reproduced immediately before is extracted and used.
3. The digital broadcast receiving device according to claim 1. 4. The arithmetic and control unit extracts a second program using the second program information extracted in advance,
While reproducing, a third bit stream is extracted using the first tuner and the first demultiplexer, and further, third program information and a third program are extracted. The digital broadcast receiving apparatus according to claim 2, wherein 5. An arithmetic and control unit, comprising: a decoder input switching device to which output signals from the first demultiplexer unit and the second demultiplexer unit are inputted, and which selects one of the signals and outputs the selected signal to the decoder unit. The apparatus transmits the first program information and a command for the user to select the second program in the second program group from the input device while the first program in the first program is being reproduced. At this time, the second tuner unit and the second demultiplexer unit are used to extract the second program information and the second program, and until the first tuner is shifted to a playable state. 3. The digital broadcast receiving apparatus according to claim 2, wherein the first program is continuously reproduced using a first unit and the first demultiplexer unit. 6. A first tuner section for extracting a first bit stream including a program group composed of at least one or more programs from a received digital broadcast signal composed of a plurality of bit streams; A first demultiplexer unit for extracting the program group from one bit stream; a second tuner unit for constantly extracting a second bit stream containing program information from the received digital broadcast signal; A second demultiplexer unit for extracting the program information from the bit stream of the above; a decoder unit for decoding the program group extracted by the first demultiplexer unit to reproduce a video or audio signal; An input device capable of transmitting a command for selecting a desired program, analyzing the extracted program information, When the user selects a different program from the input device during the reproduction of the set, the computer extracts a selected program based on the pre-analyzed program information, and reproduces the selected program. A digital broadcast receiving device characterized by the above-mentioned. 7. When receiving a program of a digital broadcast signal comprising a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used to simultaneously analyze program information included in different input bit streams, A method for processing a digital broadcast reception signal, wherein a desired program is extracted based on program information analyzed in advance when a user selects a program. 8. At the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used, and at least one tuner section and a demultiplexer section are used for a currently reproduced program. At the same time as being used for extracting the program information, at least one other tuner section and demultiplexer section were used for extracting the program that was being reproduced immediately before, and the user again selected the program that was being reproduced just before. A method for processing a digital broadcast reception signal, characterized by reproducing a program reproduced immediately before continuing extraction. 9. When receiving a program of a digital broadcast signal composed of a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used, and a first set of tuner sections and a demultiplexer section is used.
At the same time, the bit stream including the program that the user is expected to select next and the program information thereof are analyzed using at least one other tuner unit and demultiplexer unit. A digital broadcast reception signal processing method characterized in that, when a program is selected, a program is extracted based on program information analyzed and stored in advance. 10. When receiving a program of a digital broadcast signal composed of a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used, and at least one tuner section and a demultiplexer section are used. When selecting and reproducing a second program from a state in which the program is being reproduced, the first program is not used until the extraction of the second program ends and the second program can be reproduced. A method for processing a digital broadcast reception signal, characterized by continuously reproducing the signal. 11. At the time of receiving a program of a digital broadcast signal composed of a plurality of bit streams, a plurality of sets of a tuner section and a demultiplexer section are used, and at least one tuner section and a demultiplexer section are used.
Program information is always extracted from a bit stream dedicated to program information, and a desired program is extracted based on the program information by using at least one other tuner unit and demultiplexer unit. A method for processing digital broadcast reception signals.