JP2000295187A - Broadcast signal receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a circuit scale of a broadcast signal receiver and to stably continue reception processing of a main signal even when Reed-Solomon(RS) decoding for a transmitted multiplex control signal is failed on the occurrence of a deteriorated C/N or the like. SOLUTION: A de-interleave unit 5 continuously rearranges main signals, which are received by a turner 2, PSK-demodulated and Viteribi and trellis- decoded, in the unit of one super-frame in a way that a transmission multiplex control signal is placed at the tail end of the main signals continuously arranged. Then an RS decoder 7 sequentially applies RS decoding to rearranged multiplex signals receiving energy inverse spread processing, and the single RS decoder 7 is enough for the purpose. Furthermore, the decoded transmission multiplex control signal is once stored in a control signal generator 11 and used for controlling each receiver component. In this case, on the occurrence of a decoded error of an RS coded, since the control signal generator 11 stops updating the stored transmission multiplex control signal, each received component is stably controlled by the transmission multiplex control signal stored before.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast system which receives a broadcast signal transmitted, for example, via a satellite, and uses a main signal and a transmission multiplex control signal multiplexed on the broadcast signal to reproduce the main signal. The present invention relates to a signal receiving device.

[0002]

2. Description of the Related Art Conventionally, this type of broadcast signal receiving apparatus includes, for example, a BS digital broadcasting type receiver. This B
S digital broadcasting system is the digital transmission technology of HDTV, VIEW Vol.17 No.2 (1998) NHK Broadcasting Research Institute
This is a broadcasting method described by Kato (references).

FIG. 8 is a diagram for explaining a state in which a plurality of operators are multiplexed in one physical channel in the BS digital broadcasting system. This figure shows the configuration of one physical channel at a certain time, which is called a frame. Here, this frame is divided into slots, for example, 48 basic units as shown. An operator is assigned to each slot.

At the head of the slot, a transmission multiplex control signal (TMC
C: Transmission & Multiplexing Configuration Cont
rol). The subsequent portion of each slot becomes a digital bit stream.

[0005] In FIG. 8, for example, slots 1 to 22 are operator A, slots 23 to 44 are operator B, and slots 45 to 45.
48 are assigned to the operator C. Each slot has 8PS according to the bit rate of data to be transmitted.
It is permitted to be modulated by an arbitrary modulation method from among K, QPSK, BPSK and the like.

In FIG. 8, for example, in slots 1 to 44,
For example, a bit stream obtained by modulating the HD signal encoded in the MP @ HL format of the MPEG2 format with 8PSK is multiplexed, and a standard television signal encoded in the MP @ ML format of the MPEG2 format is provided in the slots 45,. Is QP
Modulated by SK.

FIG. 9 is a block diagram showing a configuration example of a conventional BS digital broadcast system broadcast signal receiving apparatus. Conventional receivers include a tuner 2, a PSK demodulator 3, a Viterbi, trellis decoder 4, a deinterleaver 5, an energy despreader 6, and a Reed-Solomon decoder (RS
Decoding device) 7, bit stream separation device 8, transmission multiplex control signal Reed-Solomon decoding device 50, transmission multiplex control signal decoding device 51, descramble device 20, video / audio decoding device 21, system control device 22, CRT2
3 and a speaker 24. The tuner 2 is connected to the antenna 1.

[0008] Here, it is assumed that a broadcast including a pay program is performed, and the pay program is scrambled, and a descrambling device 20 for descrambling the pay program permitted to be viewed is transmitted in a bit stream. It is inserted after the separation device 8. If there is no pay broadcast, the descrambling device 20 will be omitted.

Next, the operation of this embodiment will be described. The tuner 2 converts a 12 GHz band satellite broadcast signal received by the antenna 1 into a 140 MHz band signal, and outputs the signal to the PSK demodulator 3. At this time, the tuner 2 selects a desired physical channel.

The PSK demodulator 3 demodulates the received signal into I-phase (In Phase) and Q-axis (Quadrature Phase) phase signals, and the Viterbi / Trellis decoder 4 includes video and audio data. Viterbi or trellis decoding processing of the main signal and a transmission multiplex control signal indicating a multiplexing form of a plurality of carriers as shown in FIG. 8 is performed.

Among the output signals of the Viterbi and trellis decoding device 4, the main signal is output to the deinterleave device 5, and the transmission control signal is output to the transmission multiplex control signal Reed-Solomon decoding device 50.

The deinterleaving device 5 performs the deinterleaving process of the method described in the reference, and the energy despreading device 6 performs the energy despreading process. The transmission control signal is subjected to Reed-Solomon decoding processing by the transmission control signal Reed-Solomon decoding device 50, and is subsequently subjected to decoding processing by the transmission control signal decoding device 51. Using the output signal of the transmission multiplex control signal decoding device 51, control of the PSK demodulation device 3, Viterbi, trellis decoding device 4, and bit stream separation device 8 is performed.

On the other hand, the bit stream separating device 8 separates the bit stream of the operator selected by the viewer from the bit stream of the plurality of operators multiplexed on the physical channel selected by the tuner 2, and Output to the scrambler 20. In the example of FIG. 8, for example, the bit stream of the provider A is selected, time-expanded and output.

In the descrambling device 20, only programs purchased by the viewer in a program that is permitted to be viewed in advance by a contract with a broadcasting company or in a pay program such as the PPV (Pay Per View) system. Is descrambled in packet units. The output signal of the descrambling device 20 is input to a video / audio decoding device 21, where video, audio, data, or the like is decoded.

That is, the bit stream separation device 8 is provided with a transmission multiplex control signal decoding device 5
1 to separate the bit stream, and further, the video / audio decoding device 21
Expands the supplied video data compressed in the MPEG format, adjusts the delay time of the video data and audio data by compression and decompression, and converts the digitized video signal into an analog television signal. Display on CRT23. At the same time, the video / audio decoding device 21 expands the supplied compressed audio data and outputs it from the speaker 24 as an analog audio signal.

[0016]

By the way, in the conventional broadcast signal receiving apparatus as described above, regarding the decoding apparatus for the Reed-Solomon code of the transmission multiplex control signal, the transmission multiplex control signal is superimposed by combining information bits and parity bits. Since it is completed in frame units, hardware completely different from a main signal Reed-Solomon code decoding device in which information bits and parity bits are completed in slot units is required. Therefore, as shown in FIG. 9, the Reed-Solomon decoding device 7 and the transmission multiplex control signal Reed-Solomon decoding device 50 are used.
However, the two Reed-Solomon decoding devices are required, and the circuit scale is increased accordingly.

The transmission multiplexing control signal decoding device 51 of the prior art uses the transmission multiplexing control signal to transmit a control signal for selecting a transmission mode and selecting a slot corresponding to a specified TS-ID. appear. Therefore, C / N
When the transmission multiplex control signal is erroneously decoded in the transmission multiplex control signal Reed-Solomon decoding device 50 due to impulse noise or the like, there is a problem that the subsequent signal processing is immediately broken.

Further, since the transmission multiplex control signal is transmitted two superframes ahead of the main signal,
When the C / N is poor and the transmission multiplexing control signal cannot be decoded, a time difference of two superframes is generated until the C / N is improved and the C / N is restored, and it takes time to restore. .

The BS digital broadcasting system described in the reference is a broadcasting system that includes a plurality of carriers in one physical channel. A problem in a case where all the programs included in one physical channel are recorded in such a system will be described.

When recording is performed in the format of the frame configuration described in the reference and the recorded signal is reproduced, the frame synchronization is performed by the first byte of each frame and the first byte of the second slot as shown in FIG. In the superframe synchronization, synchronization acquisition is performed using the first byte of the slot after the multiplexed slot of the transmission multiplex control signal and the two bytes of the first byte of the next slot.

Therefore, several slots are required until a synchronization byte is obtained. Further, since the transmission multiplex control signal is completed in a super frame, it takes a super frame time to acquire the transmission multiplex control signal. Also, if the first superframe synchronization acquisition fails, the transmission multiplex control signal in the superframe period cannot be obtained, and a memory for waiting for the superframe or holding the transmission multiplex control signal for one superframe is required. .

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and can reduce the circuit scale, and when the C / N is reduced, the Reed-Solomon of the transmission multiplex control signal is reduced. Even if the decoding fails, the reception processing of the main signal can be continued stably, and the control is performed when the C / N becomes good and the Reed-Solomon decoding processing of the transmission multiplex control signal returns to normal. It is an object of the present invention to provide a broadcast signal receiving apparatus that can improve the response of returning and can quickly perform synchronization acquisition when recording and reproducing all programs included in one physical channel. .

[0023]

In order to achieve the above object, a feature of the present invention is to receive a multiplexed signal in which a main signal and a transmission multiplex control signal are time-division multiplexed in a large cycle unit,
In the broadcast signal receiving apparatus for controlling the reception of the main signal by the transmission multiplex control signal, the broadcast signal receiving apparatus controls the reception of the main signal and the transmission multiplex control signal of the time division multiplexed small cycle between the main signals. A rearranging means for continuously arranging only the main signal and arranging the transmission multiplexing control signal continuously in a remaining place in order to rearrange the positional relationship within a cycle; and And a Reed-Solomon decoding means for sequentially performing a Reed-Solomon decoding process on the main signal of the multiplexed signal and the transmission multiplex control signal.

According to a second aspect of the present invention, the rearrangement means temporarily stores, in a memory, the received main signal and a time division multiplexed transmission multiplexing control signal for each short period between the main signals. When the main signal and the transmission multiplex control signal are read from the memory, the rearrangement of these signals is performed, and after performing the energy despreading process on the rearranged multiplex signal, the Reed-Solomon decoding unit performs The main signal and the transmission multiplex control signal are sequentially subjected to Reed-Solomon decoding processing.

According to a third aspect of the present invention, there is provided a broadcast system which receives a multiplexed signal in which a main signal and a transmission multiplex control signal are time-division multiplexed in a large cycle unit, and controls reception of the main signal by the transmission multiplex control signal. In the signal receiving device, in order to rearrange the positional relationship within the large cycle of the received main signal and the time division multiplexed transmission multiplex control signal for each small cycle between the main signals, the main signal only And rearrangement means for continuously arranging the transmission multiplex control signals in the remaining places, and sequentially reading the main signals of the rearranged multiplex signals for each large cycle and the transmission multiplex control signals. Reed-Solomon decoding means for performing Solomon decoding processing; decoding means for decoding the Reed-Solomon-decoded transmission multiplex control signal;
First holding means for holding the transmission multiplex control signal decoded by the decoding means, second holding means for holding the decoded cycle-delayed transmission multiplex control signal, and the Reed-Solomon decoding means And an update control means for controlling the update of the transmission multiplex control signal to the first and second holding means by an error signal at the time of Reed-Solomon decoding generated by the above.

A feature of the invention according to claim 4 is that the transmission multiplex control signal with a period delay is transferred from the first holding means to the second holding means.

According to a fifth aspect of the present invention, when an error occurs during Reed-Solomon decoding of the transmission multiplex control signal, the update control means transmits the transmission multiplex control signal obtained from the decoding means to the first holding means. The holding is stopped, and the transfer of the transmission multiplex control signal from the first holding unit to the second holding unit is stopped.

According to a sixth aspect of the present invention, there is provided a broadcast system for receiving a multiplexed signal in which a main signal and a transmission multiplex control signal are time-division multiplexed in units of a large period, and controlling reception of the main signal by the transmission multiplex control signal. In the signal receiving device, the main signal is relocated within the large cycle of the received main signal and the transmission multiplex control signal time-division multiplexed every small cycle between the main signals. Rearrangement means for continuously arranging only the transmission multiplexing control signals in the remaining places, and the main signal and the transmission multiplexing control signal of the rearranged multiplexed signal for each large cycle in order. Reed-Solomon decoding means for performing Reed-Solomon decoding processing; decoding means for decoding the Reed-Solomon-decoded transmission multiplex control signal; Multiplexing means for reconstructing the multiplex signal of the large period unit by arranging and multiplexing the continuous transmission multiplex control signal and the synchronization signal decoded by the decoding means at the location of Recording and reproducing means for recording and reproducing the signal reconstructed by the method.

[0029] A feature of the invention of claim 7 is that the transmission multiplex control signal is obtained from the signal reconstructed by the recording / reproducing means, and the reconstructed signal is reconstructed based on the acquired transmission multiplex control signal. Means for separating a desired bit stream from the main signal.

In the invention according to claim 8, the large cycle is a superframe period, and the small cycle is a slot period.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the broadcast signal receiving apparatus of the present invention. The broadcast signal receiving device is a tuner 2, a PSK demodulator 3, Viterbi,
Trellis decoding device 4, deinterleaving device 5, energy despreading device 6, Reed-Solomon decoding device (RS decoding device) 7, bit stream separation device 8, transmission multiplex control signal decoding device 9, descramble device 20, video / audio decoding device 21, a system controller 22, a CRT 23 and a speaker 24.

Here, it is assumed that a broadcast including a pay program is performed, the pay program is scrambled, and the descrambling device 20 for descrambling the pay program permitted to be viewed is transmitted to the bit stream. It is inserted after the separation device 8. If there is no pay broadcast, the descrambling device 20 will be omitted.

Next, the operation of this embodiment will be described. The tuner 2 connects the antenna 1, converts a 12 GHz band satellite broadcast signal received by the antenna 1 into a 140 MHz band signal, and outputs the signal to the demodulation device 3. At this time, the tuner 2 selects a desired physical channel.

The PSK demodulator 3 demodulates the received signal into I-axis (In Phase) and Q-axis (Quadrature Phasa) phase signals.
A Viterbi or trellis decoding process of a main signal included in video and audio data and a transmission multiplex control signal indicating a multiplexing form of a plurality of carriers as shown in FIG. 8 is performed. An output signal of the Viterbi / trellis decoding device 4 is input to a deinterleave device 5.

Hereinafter, the signal processing in the deinterleave device 5 will be described. The input signal of the deinterleave device 5 has a form as shown in FIG. That is,
FIG. 2A shows a signal for one frame, which is followed by a synchronization signal, a transmission multiplex control signal, and a synchronization signal from the beginning of the frame, and a main signal is input with a phase reference burst signal interposed every 203 symbols. .

The main signal is written to the memory in order to perform the deinterleaving process according to the method described in the reference. Here, the transmission multiplex control signal is also written into the memory at the same time. Next, the main signal is read from the memory to perform the deinterleaving.

At this time, as shown in FIG. 2B, the main signal is continuously read from the beginning of the frame without the synchronization signal, the transmission multiplex control signal, and the phase reference burst signal. As a result, a time corresponding to the time of the transmission multiplex control signal and the phase reference burst is secured at the end of the super frame.

Here, the deinterleave device 5 reads the transmission multiplex control signal from the memory and rearranges the main signal and the transmission multiplex control signal in units of one superframe as shown in FIG. Then, it is input to the next-stage energy despreading device 6. The energy despreading device 6 performs an energy despreading process on the input multiplex signal, and the despread signal is further input to the Reed-Solomon decoding device 7.

The Reed-Solomon decoding device 7 uses a common circuit to decode the main signal and the transmission multiplex control signal in a time-division manner (in order). The main signal in the output signal of the Reed-Solomon code decoding device 7 is input to a bit stream separation device 8, and the transmission multiplex control signal is input to a transmission control signal decoding device 9 for decoding processing. 9
Using the output signal (control signal) of the PSK demodulator 3,
Control of the Viterbi, trellis decoding device 4 and bit stream separation device 8 is performed.

The bit stream separating device 8 separates the bit stream of the operator selected by the viewer from the bit stream of the plurality of operators multiplexed on the physical channel selected by the tuner 2, and descrambles the device. 20
Output to Prior to this processing, when the user selects a channel to be viewed with a remote controller or the like, the system control unit 22 gives the selected information to the transmission multiplex control signal decoding device 9. Therefore, the selection information is also included in the control signal sent from the transmission multiplex control signal decoding device 9 to the bit stream separation device 8.

Accordingly, the bit stream separating device 8 separates a bit stream corresponding to the selection information. In the example of FIG. 8, for example, the bit stream of the provider A is selected, time-expanded and output.

In the descrambling device 20, only programs purchased by the viewer in a program permitted to be viewed in advance by a contract with a broadcaster or a pay program such as the PPV (Pay Per View) system are used. Is descrambled in packet units.

The output signal of the descrambling device 20 is input to a video / audio decoding device 21, where video, audio, data or the like is decoded.

The bit stream separating device 8 is an MPEG
2 format MP {HL format or MP}
By performing TS decoding in the ML format in accordance with an instruction from the transmission multiplex control signal decoding device 9, bit stream separation is performed.
1. The video data compressed in the MPEG format supplied by 1 is expanded, the delay time of the video data and the audio data is adjusted by compression and expansion, and then the digitized video signal is converted into an analog television signal. , CRT23
To be projected. At the same time, the video / audio decoding device 21
The supplied compressed audio data is expanded and output to the speaker 24 as an analog audio signal.

According to the present embodiment, as shown in FIG. 2B, the main signal is a synchronization signal at the beginning of the frame shown in FIG. 2A, and a phase reference between the transmission multiplex control signal and the main signal. By reconstructing the frame so as to be continuous from the beginning of the frame without the burst signal, and by inserting the transmission multiplex control signal and the phase reference signal together at the end of the superframe, the By decoding the main signal first by the Solomon decoding device 7 and then by decoding the transmission multiplex control signal, both the main signal and the transmission multiplex control signal are decoded in a time division manner by one Reed-Solomon decoding device 7. The size of the hardware can be reduced accordingly, and the device can be made smaller and less expensive.

In the deinterleave device 5, the signal read from the memory is supplied to the MPE.
A frame synchronization signal, a superframe synchronization signal, and a transmission multiplex control signal may be added instead of the G synchronization signal to reconstruct the frame structure.

FIG. 3 is a block diagram showing a broadcast signal receiving apparatus according to a second embodiment of the present invention. However, the same parts as those in the first embodiment shown in FIG.
In addition, a description thereof will be omitted as appropriate.

The configuration of the broadcast signal receiving apparatus of this embodiment is substantially the same as that of the first embodiment, except that the transmission multiplex control signal decoded by the transmission multiplex control signal decoding apparatus 9 is temporarily stored. , A PSK demodulator 3, a Viterbi, trellis decoder 4, and a control signal generator 11 to be supplied to the bit stream separator 8.

Next, the operation of this embodiment will be described. The transmission multiplex control signal subjected to Reed-Solomon decoding by the Reed-Solomon decoding device 7 is input to the transmission multiplex control signal decoding device 9 and decoded, and the decoded transmission multiplex control signal is input to the control signal generation device 11. .

FIG. 4 is a circuit diagram showing a detailed configuration example of the control signal generator 11, and FIG. 5 is a timing chart for explaining its operation. However, the superframe is shown here as one unit.

FIG. 5 (a) shows the timing of the main signal input to the deinterleave device 5, and SF0, SF1,.
SF2, SF3, and SF4 are input in this order, and the numbers attached to SF are superframe numbers 0,
It means 1, 2, 3, 4 main signals.

FIG. 5B shows the timing of the transmission multiplex control signal input to the deinterleaver 5.
5A and 5B, the main signal S at the same timing
It can be seen from the difference between F and the attached number of the transmission multiplex control signal TM that the transmission multiplex control signal is transmitted two superframes ahead of the main signal.

FIG. 5C is a diagram showing the timing of writing and reading signals to and from the memory of the deinterleaver 5. The main signal SF0 and the transmission multiplex control signal TM2 are written in the memory. At the next timing, the main signal SF1 and the transmission multiplex control signal TM3 are written in the memory, and the main signal SF0 and the transmission multiplex control signal TM2 are read from the memory.

Therefore, as shown in FIGS. 5D and 5E, the main signal SF0 and the transmission multiplex control signal TM2 read from the memory are output from the deinterleave device 5, and so on. Here, the main signal is delayed by one superframe as shown in FIGS.
As shown in (e), the transmission multiplex control signal is also delayed by one superframe.

The signal output from the deinterleaving device 5 is despread in energy by the energy despreading device 6 and then Reed-Solomon decoded by the Reed-Solomon decoding device 7, and the main signal is separated into a bit stream separating device 8.
The transmission multiplex control signal is sent to the transmission multiplex control signal decoding device 9.

The transmission multiplex control signal decoding device 9 decodes the Reed-Solomon-decoded transmission multiplex control signal, and stores the obtained transmission multiplex control signal in the register 13 via the AND gate 15 of the control signal generation device 11. After one superframe, the content of the register 13 is changed to the AND gate 1
6 and stored in the register 14. At this time, the transmission multiplex control signal update control device 12 controls the AND gates 15, 16
Are conducted, and the AND gate 17 is shut off.

The transmission multiplex control signal stored in the register 13 of the control signal generator 11 is read out at the timing shown in FIG. 5 (f) and supplied to the PSK demodulator 3, Viterbi and trellis decoder 4. Are used for controlling these devices.

Thereafter, the transmission multiplex control signal stored in the register 14 is read out at the timing shown in FIG.
It is supplied to the bit stream separation device 8 and used for controlling the device 8.

Accordingly, the transmission multiplex control signal T shown in FIG.
M2, 3, and 4 are main signals before the deinterleave processing (FIG. 5).
FIG. 5 (h) is used for processing of SF2, 3, 4) in (a).
Indicates the timing of the transmission multiplex control signal used in the bit stream separation device 8, and it can be seen that there is a delay of one superframe from the use timing of the transmission multiplex control signal shown in FIG. Therefore, the data in the register 14 is data delayed by one superframe from the data in the register 13.

Here, in the present embodiment, in Reed-Solomon decoding of the transmission multiplex control signal, an error determination signal (error signal) indicating that correct decoding was not performed is generated from Reed-Solomon decoding device 7. The transmission multiplex control signal of the device 11 is sent to the update control device 12.

For example, when the C / N decreases and the error determination signal of the Reed-Solomon decoding device 7 indicates that an error has occurred, the transmission multiplex control signal updating control device 12 having received this indicates that the transmission multiplex control signal decoding device 9 The AND gates 15 and 16 are shut off in order to inhibit data transfer to the register 13 and data transfer from the register 13 to the 1-register 14. This allows
Thereafter, since the registers 13 and 14 hold the transmission multiplex control signals before the occurrence of the error, the transmission multiplex control signals to the PSK demodulator 3, Viterbi, trellis decoder 4, and bit stream separator 8 are broken. Instead, the power is supplied stably, and the receiving operation is maintained.

Next, the operation when the C / N is improved and the operation returns to the normal operation from the state where the C / N is reduced and the update of the transmission multiplex control signal is prohibited will be described. At this time, in the transmission multiplexing control signal decoding device 9, the change instruction bit of the transmission multiplexing control signal shown in the reference has changed from the update prohibited state to the state of returning to the normal operation, that is, the change has occurred. When the transmission multiplex control signal decoding device 9 releases the update prohibition from the register 13 to the register 13 and the register 13 to the register 14, the AND gate 17 is turned on, and the output signal of the transmission multiplex control signal 9 to the register 14 is output. Is input directly through the AND gate 17.

By this operation, the changed transmission multiplex control signal is sent to the register 14 via the register 13 with a delay of one superframe, and is not switched to the new transmission multiplex control signal. Switching can be performed instantaneously, and the responsiveness of control recovery when the C / N becomes good after the failure is improved. The following operation is the same as in the first embodiment.

According to the present embodiment, the circuit scale can be reduced, and even if the Reed-Solomon decoding of the transmission multiplex control signal fails when the C / N drops, the main signal reception processing can be performed. It is possible to stably continue, and furthermore, it is possible to improve the responsiveness of control restoration when the C / N becomes good and the Reed-Solomon decoding processing of the transmission multiplex control signal returns to normal.

FIG. 6 is a block diagram showing a third embodiment of the broadcast signal receiving apparatus according to the present invention. However, the same parts as those in the first embodiment shown in FIG.
In addition, a description thereof will be omitted as appropriate.

The configuration of the broadcast signal receiving apparatus of this embodiment is almost the same as that of the first embodiment, except that the transmission multiplex control signal decoded by the transmission multiplex control signal decoding apparatus 9 is multiplexed with the main signal again. And a recording / reproducing device 30 for recording / reproducing a signal multiplexed by the transmission / multiplexing control signal multiplexing device 10. , 19 are provided.

Next, the operation of this embodiment will be described. The operation up to the Reed-Solomon decoding device 7 of this example is the first operation.
This is the same as the embodiment. Reed-Solomon decoding device 7
Of the Reed-Solomon decoded signal, the main signal is passed through a signal selection device 18 to a bit stream separation device 8.
And to the transmission multiplex control signal multiplexer 10.

On the other hand, among the output signals of the Reed-Solomon decoder 7, the transmission multiplex control signal is input to the transmission multiplex control signal decoder 9 via the signal selector 19, and the transmission multiplex control signal decoded here is PSK demodulator 3, Viterbi,
The signal is supplied to the trellis decoding device 4 and the bit stream separation device 8 and is input to the transmission multiplex control signal multiplexing device 10.

The transmission multiplexing control signal multiplexing apparatus 10 has the configuration shown in FIG.
As shown in (c), the input main signal and the frame synchronization signal and the superframe synchronization signal are continuously multiplexed at the end of the superframe where the main signal does not exist, and transmission multiplexing control is performed following these synchronization signals. By multiplexing and multiplexing the signals for one superframe, a multiplexed signal is reconstructed, and the multiplexed signal is transmitted from the output signal terminal 26 to the recording / reproducing device 30 for recording.

Thereafter, when the multiplexed signal recorded in the recording / reproducing apparatus 30 is reproduced, a reproduced signal reproduced from the recording / reproducing apparatus 30 is inputted from the input signal terminal 25. This reproduced signal is input to the bit stream separation device 8 via the signal selection device 18 and is input to the transmission multiplex control signal decoding device 9 via the signal selection device 19.

The transmission multiplex control signal decoding device 9 has the configuration shown in FIG.
A synchronization signal is extracted from the multiplexed signal of the format (c) to capture the synchronization, and then a multiplexed transmission multiplex control signal is extracted and supplied to the bit stream separation device 8. As a result, the bit stream separation device 8 separates a desired bit stream from the main signal of the input reproduction signal, and outputs it to the descramble device 20. The subsequent operation is the same as that of the first embodiment.

According to the present embodiment, it is possible to record all the programs of all the operators included in one physical channel such as the operators A, B, and C shown in FIG. As shown in FIG. 2 (c), since the frame synchronization signal and the superframe synchronization signal are continuously multiplexed at the end of the superframe where no main signal exists, the multiplexed signal is reproduced from the recording / reproducing device 30. Synchronization can be quickly performed. Other effects are similar to those of the first embodiment shown in FIG.

Although the embodiment of the present invention has been described above, the expression “bit stream” in the above-described embodiment can be applied to the expression “transport stream” as it is.

[0074]

As described above in detail, according to the broadcast signal receiving apparatus of the present invention, the circuit scale can be reduced, and the Reed-Solomon decoding of the transmission multiplex control signal can be performed when the C / N decreases. Even if the conversion fails, the reception processing of the main signal can be stably continued, and the C / N becomes good,
Responsiveness of control return when the Reed-Solomon decoding process of the transmission multiplex control signal returns to normal can be improved, and furthermore, synchronization acquisition when recording and reproducing all programs included in one physical channel can be quickly performed. Can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a broadcast signal receiving apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a method for rearranging signals in superframe units in a deinterleaving apparatus and reconstructing a multiplexed signal in a transmission multiplexing control signal multiplexing apparatus.

FIG. 3 is a block diagram illustrating a broadcast signal receiving apparatus according to a second embodiment of the present invention.

FIG. 4 is a circuit diagram showing a detailed configuration example of the control signal generator shown in FIG. 1;

FIG. 5 is a timing chart for explaining the operation of the control signal generator shown in FIG.

FIG. 6 is a block diagram showing a third embodiment of the broadcast signal receiving device of the present invention.

FIG. 7 is a schematic diagram illustrating a structure example of a received time-division multiplex signal.

FIG. 8 is a diagram illustrating a state in which a plurality of carriers are multiplexed in one physical channel in the BS digital broadcasting system.

FIG. 9 is a block diagram illustrating a configuration example of a conventional BS digital broadcast system broadcast signal receiving apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Tuner, 3 ... PSK demodulator, 4
... Viterbi, trellis decoding device, 5 ... Deinterleaving device, 6 ... Energy despreading device, 7 ... Reed-Solomon decoding device (RS decoding device), 8 ... Bitstream separation device, 9 ... Transmission multiplex control signal decoding device, 10 ... Transmission multiplex control signal multiplexer, 11: control signal generator, 12: transmission multiplex control signal update controller, 13, 14: register, 1
5, 16, 17: AND gate, 18, 19: signal selection device, 20: descrambling device, 21: video / audio decoding device, 22: system control device, 23: CRT, 2
4 Speaker, 25 Input signal terminal, 26 Output signal terminal, 30 Recording / reproducing device.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04J 3/00 H04N 7/20 630 H04N 7/20 630 H03M 13/12 (72) Inventor Masami Aizawa Kanagawa 8 Shinsugita-cho, Isogo-ku, Yokohama-shi Inside Toshiba Multimedia Technology Research Laboratories (72) Inventor Kenichi 3-3-9, Shimbashi, Minato-ku, Tokyo F-term in Toshiba E-Buiy Corporation 5C064 DA03 DA10 5J065 AB01 AC01 AD11 AE02 AF03 5K028 AA07 BB05 MM09 RR04 SS14 SS24 5K061 AA04 BB10 FF11

Claims (8)

[Claims] 1. A broadcast signal receiving apparatus for receiving a multiplexed signal in which a main signal and a transmission multiplex control signal are time-division multiplexed in a large cycle unit, and controlling reception of the main signal by the transmission multiplex control signal. In order to relocate the positional relationship within the large period of the main signal and the time division multiplexed transmission multiplex control signal for each small period between the main signals, only the main signal is continuously arranged and the remaining Relocation means for continuously arranging the transmission multiplex control signal at a location; Reed-Solomon decoding for sequentially performing Reed-Solomon decoding of the rearranged main signal and transmission multiplex control signal of the multiplex signal for each large cycle. A broadcast signal receiving apparatus, comprising: 2. The relocation means temporarily stores, in a memory, the received main signal and a time-division multiplexed transmission multiplex control signal between the main signals, the transmission multiplex control signal being stored in a memory. When reading the signal and the transmission multiplex control signal,
After performing the rearrangement of these signals and performing energy despreading processing of the rearranged multiplexed signal, the Reed-Solomon decoding unit sequentially performs Reed-Solomon decoding of the main signal and the transmission multiplex control signal. The broadcast signal receiving device according to claim 1, wherein: 3. A broadcast signal receiving apparatus for receiving a multiplexed signal obtained by time-divisionally multiplexing a main signal and a transmission multiplex control signal in a large cycle unit and controlling reception of the main signal by the transmission multiplex control signal. In order to relocate the positional relationship within the large period of the main signal and the time division multiplexed transmission multiplex control signal for each small period between the main signals, only the main signal is continuously arranged and the remaining Relocation means for continuously arranging the transmission multiplex control signal at a location; Reed-Solomon decoding for sequentially performing Reed-Solomon decoding of the rearranged main signal and transmission multiplex control signal of the multiplex signal for each large cycle. Decoding means; decoding means for decoding the Reed-Solomon-decoded transmission multiplex control signal; first holding means for holding the transmission multiplex control signal decoded by the decoding means; Second holding means for holding a transmission multiplex control signal having a delayed period, and transmission multiplex control to the first and second holding means based on an error signal during Reed-Solomon decoding generated by the Reed-Solomon decoding means. A broadcast signal receiving apparatus, comprising: update control means for controlling signal update. 4. The broadcast signal receiving apparatus according to claim 3, wherein said transmission multiplex control signal with a period delay is transferred from said first holding means to said second holding means. 5. The update control means, when an error occurs during Reed-Solomon decoding of the transmission multiplex control signal, cause the first holding means to hold the transmission multiplex control signal obtained from the decoding means. 5. The broadcast signal receiving apparatus according to claim 4, wherein the broadcast signal receiving apparatus stops the transfer and the transfer of the transmission multiplex control signal from the first holding means to the second holding means. 6. A broadcast signal receiving apparatus which receives a multiplexed signal obtained by time-divisionally multiplexing a main signal and a transmission multiplex control signal in a large cycle unit and controls reception of the main signal by the transmission multiplex control signal. In addition, in order to relocate the positional relationship within the large cycle of the transmission multiplex control signal that is time-division multiplexed every small cycle between the main signal and the main signal, only the main signal is continuously arranged, and the remaining Relocation means for continuously arranging the transmission multiplex control signal at a location, and a Reed-Solomon for performing Reed-Solomon decoding processing on the rearranged main signal and transmission multiplex control signal of the multiplex signal for each large cycle in order. Decoding means; decoding means for decoding the Reed-Solomon-decoded transmission multiplex control signal; and continuous decoding of the Reed-Solomon-decoded main signal and the decoding means at a location other than these main signals. Multiplexing means for reconstructing the multiplexed signal of the large period unit by arranging and multiplexing a continuous transmission multiplex control signal and a synchronization signal decoded by the multiplexing means; and a signal reconstructed by the multiplexing means. And a recording / reproducing means for recording / reproducing the broadcast signal. 7. A means for acquiring the transmission multiplex control signal from the signal reconstructed by the recording / reproducing means, and a desired bit from a main signal of the signal reconstructed based on the acquired transmission multiplex control signal. The broadcast signal receiving apparatus according to claim 6, further comprising: means for separating a stream. 8. The large cycle is a superframe period,
2. The small cycle is a slot period.
8. The broadcast signal receiving device according to any one of claims 7 to 7.