JP7020582B1 - Demodulation module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly versatile demodulation module. SOLUTION: The demodulation module 200 is a demodulation module 200 that demodulates a broadcast signal of digital broadcasting and outputs two TS signals, and is converted by an AD conversion unit 210 that converts an IF signal i21 and outputs a conversion signal c21. The demodulation error correction unit 230 that demodulates the signal c21 and outputs the TS signal t21, the AD conversion unit 220 that converts the IF signal i22 and outputs the conversion signal c22, and the TS signal that demodulates the conversion signal c22. It includes a demodulation error correction unit 240 that outputs t22, and a TS selection unit 250 that selects and outputs one of the TS signals t21 and the TS signal t22. The demodulation module 200 has a mode M21 and a mode M22, and the TS selection unit 250 selects the TS signal t21 in the mode M21, and in the mode M22, the TS signal that can be correctly demodulated out of the TS signal t21 and the TS signal t22. Select. [Selection diagram] FIG. 11A

Description

The present disclosure relates to a demodulation module that demodulates a broadcast signal of digital broadcasting.

As a transmission method for digital broadcasting, a multi-carrier transmission method is known in which a stream exceeding the transmission capacity of one carrier wave is divided and transmitted by using a plurality of carrier waves and synthesized by a receiving device (for example, Patent Document 1, Patent Document 1, Non-Patent Document 1).

Further, in order to expand the transmission capacity for next-generation terrestrial broadcasting, a transmission method using MIMO (MultiInput-MultiOptut) is being studied (see, for example, Non-Patent Document 2).

International Publication No. 2016/112783

Ministry of Internal Affairs and Communications: Information and Communication Council, Information and Communication Technology Subcommittee, Broadcasting System Committee Report (Draft), "Chapter 6: Technical Conditions for Multiple Carrier Transmission System (ITU-T Recommendation J.183)", p. 64-93 Kenichi Murayama, "Large-capacity transmission method for next-generation terrestrial broadcasting," NHK Science & Technical Research Laboratories, R & D / No. 136 / 2012.11

The broadcast signal of the digital broadcast transmitted by the above transmission method is demodulated and synthesized by, for example, a demodulation module including a demodulation unit and a synthesis unit. However, the conventional demodulation module is limited to a specific application, and it is difficult to correspond to various reception forms.

It is an object of the present disclosure to provide a highly versatile demodulation module capable of corresponding to various reception forms.

The demodulation module according to one embodiment of the present disclosure is a demodulation module capable of demodulating a digital broadcast broadcast signal and outputting two TS (Transport Stream) signals, and is generated based on the broadcast signal. A first IF (Intermediate Frequency) signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first conversion signal based on the AD conversion process is output. A first demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing is performed on the first converted signal, and the first TS based on the first demodulation processing. A first demodulation error correction unit that outputs a signal and a second IF signal generated based on the broadcast signal are input, and AD conversion processing is performed on the second IF signal, and the AD conversion processing is performed. A second AD conversion unit that outputs a second conversion signal based on the above, and a second demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing are performed on the second conversion signal. A second demodulation error correction unit that outputs a second demodulation signal based on the second demodulation process, the first TS signal and the second TS signal are input, and the first TS signal and the first TS signal are input. The demodulation module includes a TS selection unit that selects and outputs one of the two TS signals, and the demodulation module has a first mode and a second mode, and the TS selection unit has the first mode. In the first mode, the first TS signal is selected, and in the second mode, the first demodulation process and the second demodulation process perform demodulation processes based on different parameters, and the first TS signal And, among the second TS signals, the TS signal that has been demodulated correctly is selected.

The demodulation module according to one embodiment of the present disclosure is a demodulation module capable of demodulating a digital broadcast broadcast signal and outputting two TS (Transport Stream) signals, and is generated based on the broadcast signal. A first IF (Intermediate Frequency) signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first conversion signal based on the AD conversion process is output. A first demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing is performed on the first converted signal, and the first TS based on the first demodulation processing. A first demodulation error correction unit that outputs a signal and a second IF signal generated based on the broadcast signal are input, and AD conversion processing is performed on the second IF signal, and the AD conversion processing is performed. A second AD conversion unit that outputs a second conversion signal based on the above, and a second demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing are performed on the second conversion signal. A second demodulation error correction unit that outputs a second demodulation signal based on the second demodulation process, the first TS signal and the second TS signal are input, and the first TS signal and the first TS signal are input. A TS selection unit that selects and outputs one of the two TS signals is provided, and the first conversion signal and the second conversion signal are input to the first conversion signal and the first conversion signal. The first selection unit includes a first selection unit that selects any of the second conversion signals and outputs the selected signal as the first selection signal, and the first selection unit performs the second conversion in the first mode. The signal is output as the first selection signal, or the first conversion signal is output as the first selection signal in the second mode, and the second demodulation error correction unit performs the second conversion. The first selection signal is input in place of the signal, the second demodulation process is performed on the first selection signal, and the second TS signal based on the second demodulation process is output.

The demodulation module according to one embodiment of the present disclosure is a demodulation module capable of demodulating a broadcast signal of digital broadcasting and outputting two TS (Transport Stream) signals, and is generated based on the broadcast signal. A first IF (Intermediate Frequency) signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first conversion signal based on the AD conversion process is output. A first demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process is performed on the first converted signal, and the first TS is based on the first demodulation process. A first demodulation error correction unit that outputs a signal and a second IF signal generated based on the broadcast signal are input, and AD conversion processing is performed on the second IF signal, and the AD conversion processing is performed. A second AD conversion unit that outputs a second conversion signal based on the above, and a second demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing are performed on the second conversion signal. A second demodulation error correction unit that outputs a second demodulation signal based on the second demodulation process, the first TS signal and the second TS signal are input, and the first TS signal and the first TS signal are input. A TS selection unit that selects and outputs one of the two TS signals is provided, and further, the first IF signal and the second IF signal are input, and the first IF signal and the first IF signal and the first IF signal and the second IF signal are input. The second selection unit includes a second selection unit that selects one of the second IF signals and outputs the second selection signal, and the second selection unit outputs the second IF signal in the first mode. The first IF signal is output as the second selection signal in the second mode, and the second AD conversion unit replaces the second IF signal with the second IF signal. The selection signal of is input, AD conversion processing is performed on the second selection signal, and the second conversion signal based on the AD conversion processing is output.

It should be noted that these comprehensive or specific embodiments may be realized by a recording medium such as a system, a method, an integrated circuit, a computer program or a computer-readable CD-ROM, and the system, a method, an integrated circuit, or a computer. It may be realized by any combination of a program and a recording medium.

According to the present disclosure, it is possible to provide a highly versatile demodulation module capable of corresponding to various reception forms.

FIG. 1 is a block configuration diagram showing a receiving device of Comparative Example 1. FIG. 2 is a block configuration diagram showing a demodulation module of Comparative Example 1. FIG. 3 is a block configuration diagram showing a demodulation module according to the first embodiment. FIG. 4 is a diagram showing a first demodulation unit of the demodulation module according to the first embodiment. FIG. 5A is a block configuration diagram showing a receiving device including the demodulation module according to the first embodiment. FIG. 5B is a diagram showing a situation of a signal transmitted in the demodulation module according to the first embodiment. FIG. 6A is a block configuration diagram showing a receiving device including a demodulation module according to the first modification of the first embodiment. FIG. 6B is a diagram showing a situation of a signal transmitted in the demodulation module according to the first modification of the first embodiment. FIG. 7 is a block configuration diagram showing a demodulation module according to the second modification of the first embodiment. FIG. 8A is a block configuration diagram showing a receiving device including a demodulation module according to the second modification of the first embodiment. FIG. 8B is a diagram showing a situation of a signal transmitted in the demodulation module according to the second modification of the first embodiment. FIG. 9A is a block configuration diagram showing a receiving device including a demodulation module according to the third modification of the first embodiment. FIG. 9B is a diagram showing a situation of a signal transmitted in the demodulation module according to the third modification of the first embodiment. FIG. 10 is a block configuration diagram showing a demodulation module of Comparative Example 2. FIG. 11A is a block configuration diagram showing a demodulation module according to the second embodiment. FIG. 11B is a diagram showing a form of a signal transmitted in the demodulation module according to the second embodiment. FIG. 12A is a block configuration diagram showing a demodulation module according to the first modification of the second embodiment. FIG. 12B is a diagram showing a form of a signal transmitted in the demodulation module according to the first modification of the second embodiment. FIG. 13A is a block configuration diagram showing a demodulation module according to the second modification of the second embodiment. FIG. 13B is a diagram showing a form of a signal transmitted in the demodulation module according to the second modification of the second embodiment. FIG. 14A is a block configuration diagram showing the demodulation module of Comparative Example 3. FIG. 14B is a diagram showing terminal assignments of output terminals of the demodulation module of Comparative Example 3. FIG. 15 is a block configuration diagram showing a demodulation module according to the third embodiment. FIG. 16 is a block configuration diagram showing a receiving device including the demodulation module of the third embodiment. FIG. 17 is a diagram showing terminal assignment of output terminals of the demodulation module according to the third embodiment. FIG. 18 is a block configuration diagram showing a receiving device including a demodulation module of another example. FIG. 19 is a diagram showing terminal assignments of output terminals of the demodulation module of another example. FIG. 20 is a block configuration diagram showing a demodulation module according to the first modification of the third embodiment. FIG. 21 is a block configuration diagram showing a demodulation module according to the second modification of the third embodiment. FIG. 22 is a diagram showing terminal assignment of output terminals of the demodulation module according to the second modification of the third embodiment. FIG. 23 is a block configuration diagram showing the demodulation module of Comparative Example 4. FIG. 24 is a block configuration diagram showing a demodulation module according to the fourth embodiment. FIG. 25 is a block configuration diagram showing a demodulation module according to the first modification of the fourth embodiment. FIG. 26 is a block configuration diagram showing a demodulation module according to the second modification of the fourth embodiment. FIG. 27 is a block configuration diagram showing a demodulation module according to the third modification of the fourth embodiment. FIG. 28 is a block configuration diagram showing a demodulation module according to the fourth modification of the fourth embodiment. FIG. 29 is a block configuration diagram showing a demodulation module according to the fifth modification of the fourth embodiment. FIG. 30 is a block configuration diagram showing a receiving device including the demodulation module of Comparative Example 5. FIG. 31 is a block configuration diagram showing a receiving device including the demodulation module according to the fifth embodiment. FIG. 32 is a block configuration diagram showing a receiving device including a demodulation module according to a modification of the fifth embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that all of the embodiments described below show a specific example of the present disclosure. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, the order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present disclosure. Further, among the components in the following embodiments, the components not described in the independent claims indicating the implementation embodiment according to the present disclosure will be described as arbitrary components. The embodiment of the present disclosure is not limited to the current independent claims, but may be expressed by other independent claims.

It should be noted that each figure is a schematic view and is not necessarily exactly shown. Further, in each figure, the same reference numerals are given to substantially the same configurations, and duplicate explanations may be omitted or simplified.

(Embodiment 1)
[1-1. Background to this disclosure]
The process leading to this disclosure will be described with reference to FIGS. 1 and 2 which are Comparative Examples 1.

As a transmission method for 4K8K digital broadcasting using a communication cable, a multi-carrier transmission method is known in which a stream exceeding the transmission capacity of one carrier wave is divided and transmitted by using a plurality of carrier waves and synthesized by a receiving device. In the multi-carrier transmission method, for example, information such as a group ID and a frame order defined in a new field in an extended TSMF (Transport Streams Multiplexing Frame) header is used to determine whether or not the group has the same multi-carrier. Frame division / composition processing on the carrier wave is executed.

FIG. 1 is a block configuration diagram showing a receiving device 1001 of Comparative Example 1. FIG. 1 shows a configuration in which signals output from four demodulation units are combined by one synthesis unit. Specifically, first, a desired channel is selected by each of the RF units (tuners) 61, 62, 63 and 64, and an IF (Intermediate Frequency) signal is output from each of the RF units 61 to 64. Next, each demodulation unit 71, 72, 73, and 74 performs demodulation processing and error correction processing on the IF signals of the respective channels, and outputs a TS (Transport Stream) signal of a plurality of carrier waves. Next, the synthesis unit 91 synthesizes TS signals of a plurality of carrier waves, and then the decoder (not shown) decodes the signals.

FIG. 2 is a block configuration diagram showing the demodulation module 1000 of Comparative Example 1. The demodulation module 1000 of Comparative Example 1 has one demodulation unit 81 and a synthesis unit 92. In this demodulation module 1000, the TS signal output from the demodulation unit 81 and the three TS signals input from the outside are input to the synthesis unit 92, combined by the synthesis unit 92, and then externally (decoder or the like). ) Is output.

Recently, TVs and recorders for viewing multiple programs have become widespread, and as shown in FIG. 1, the receiving device 1001 may have two or more demodulation units for receiving digital broadcasts, but a plurality of carrier waves. Currently, there is no receiving device that supports the transmission method. For example, it is possible that the receiving device 1001 is provided with two demodulation modules 1000 shown in FIG. 2 to support a multi-carrier transmission method, but in that case, the receiving device 1001 is limited to a specific application and can be used in various receiving modes. It is difficult to deal with.

On the other hand, the demodulation module of the present disclosure has the following configuration, so that it can be used in various reception modes and can be used with high flexibility.

[1-2. Demodulation module configuration]
The demodulation module 100 of the first embodiment will be described with reference to FIGS. 3 and 4. The demodulation module 100 is a module that demodulates and outputs a broadcast signal of a digital broadcast in which at least one of two contents is divided into a plurality of carrier waves and transmitted in parallel.

FIG. 3 is a block configuration diagram showing a demodulation module 100 according to the first embodiment.

As shown in FIG. 3, the demodulation module 100 includes a first processing unit 110 and a second processing unit 120. The first processing unit 110 includes a first demodulation unit 111, a first selection unit 112, and a first synthesis unit 113. The second processing unit 120 includes a second demodulation unit 121, a second selection unit 122, and a second synthesis unit 123. Further, the demodulation module 100 includes input terminals 11, 12, 13, 14, 15, 16, 17, 18 and output terminals 11z, 12z.

The input terminal 11 is connected to the first demodulation unit 111, the input terminals 12 and 13 are connected to the first synthesis unit 113, and the input terminal 14 is connected to the first selection unit 112. The input terminal 15 is connected to the second demodulation unit 121, the input terminals 16 and 17 are connected to the second synthesis unit 123, and the input terminal 18 is connected to the second selection unit 122. The output side of the first demodulation unit 111 is connected to the first synthesis unit 113 and the second selection unit 122, and the output side of the second demodulation unit 121 is connected to the second synthesis unit 123 and the first selection unit 112. There is. The output side of the first synthesis unit 113 is connected to the output terminal 11z, and the output side of the second synthesis unit 123 is connected to the output terminal 12z.

It is not necessary that all of the input terminals 11 to 18 are connected to the outside, and the presence or absence of connection can be changed according to the number of carrier waves used in the plurality of carrier wave method.

Here, with reference to FIG. 5A, signals input to and from the demodulation module 100 will be described. FIG. 5A is a diagram showing a configuration of a receiving device 101 including a demodulation module 100.

As shown in FIG. 5A, the first IF signal i11 output from the RF unit 61 is input to the input terminal 11 of the demodulation module 100. The first input TS signal t1a output from the demodulation unit 72 is input to the input terminal 12. The first input TS signal t1b output from the demodulation unit 73 is input to the input terminal 13. The first input TS signal t1c output from the demodulation unit 74 is input to the input terminal 14. The second IF signal i12 output from the RF unit 65 is input to the input terminal 15. The second input TS signal t2a output from the demodulation unit 76 is input to the input terminal 16. The second input TS signal t2b output from the demodulation unit 77 is input to the input terminal 17. The second input TS signal t2c output from the demodulation unit 78 is input to the input terminal 18.

The first IF signal i11 and the first input TS signals t1a to t1c are signals generated from one of a plurality of carrier waves, and are generated based on the broadcast signal of one of the two contents. Will be done. The second IF signal i12 and the second input TS signals t2a to t2c are signals generated from the other one of the plurality of carrier waves, and are generated based on the broadcast signal of the other content of the two contents. Will be done. In the present embodiment, the two contents are different contents from each other.

In the present embodiment, the video / audio output format will be described as TS, but the present invention is not limited to this, and the output format of the TLV (Type Length Value) packet may be TS. TLV is a format used in BS4K8K broadcasting, which is an advanced BS.

As shown in FIG. 3, the first IF signal i11 is input to the first demodulation unit 111 via the input terminal 11. The first demodulation unit 111 performs demodulation processing on the input first IF signal i11, takes out the TS, and generates the first internal TS signal ts1. The first demodulation unit 111 outputs the first internal TS signal ts1 to the first synthesis unit 113 and the second selection unit 122.

The second IF signal i12 is input to the second demodulation unit 121 via the input terminal 15. The second demodulation unit 121 performs demodulation processing on the input second IF signal i12, takes out the TS, and generates the second internal TS signal ts2. The second demodulation unit 121 outputs the second internal TS signal ts2 to the second synthesis unit 123 and the first selection unit 112.

FIG. 4 is a diagram showing a first demodulation unit 111 of the demodulation module 100.

As shown in FIG. 4, the first demodulation unit 111 includes an AD (Analog Digital) conversion unit 111a, a demodulation core unit 111b, and an error correction unit 111c. The AD conversion unit 111a converts an analog signal into digital, the demodulation core unit 111b performs synchronization or waveform equalization, and the error correction unit 111c performs error correction such as RS (Reed-Solomon) decoding, and TS data. Is output. The second demodulation unit 121 also has the same configuration as the first demodulation unit 111.

As shown in FIG. 3, the first input TS signal t1c is input to the first selection unit 112 via the input terminal 14, and the second internal TS signal ts2 output from the second demodulation unit 121. Is entered. The first selection unit 112 selects one of the first input TS signal t1c and the second internal TS signal ts2, and uses the selected signal as the third internal TS signal ts3 to the first synthesis unit 113. Output.

The second input TS signal t2c is input to the second selection unit 122 via the input terminal 18, and the first internal TS signal ts1 output from the first demodulation unit 111 is input to the second selection unit 122. The second selection unit 122 selects one of the second input TS signal t2c and the first internal TS signal ts1, and uses the selected signal as the fourth internal TS signal ts4 to the second synthesis unit 123. Output.

As described above, each of the first selection unit 112 and the second selection unit 122 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 100.

In a general multi-carrier transmission method, a data string of TS of one group is divided into a plurality of carrier waves and transmitted, and the data string is restored to the original state on the receiving side. For example, in the multi-carrier transmission method, one TS data string is divided into TS0, TS1, TS2, TS3, TS4, and TS5 in order from the front, of which TS0, TS2, and TS4 are transmitted by the first carrier, and TS1, The TS3 and TS5 are transmitted by the second carrier wave, and the two carrier waves are transmitted as one group.

The demodulation module 100 of the present embodiment divides the data strings of the TSs of the two groups into a plurality of carriers, transmits the data strings of the two systems having different carrier waves, and the data strings of the TSs of the original two groups on the receiving side. Restore to. Therefore, signals from different groups are input to each of the first selection unit 112 and the second selection unit 122.

The first synthesis unit 113 synthesizes a plurality of TS signals including the first internal TS signal ts1 and the third internal TS signal ts3, and outputs the first synthetic TS signal c11. Specifically, the first internal TS signal ts1 output from the first demodulation unit 111 is input to the first synthesis unit 113, and the first input TS is input via the input terminals 12 and 13, respectively. The signals t1a and t1b are input, and the third internal TS signal ts3 output from the first selection unit 112 is input. The first synthesis unit 113 synthesizes the first internal TS signal ts1, the first input TS signal t1a, t1b, and the third internal TS signal ts3 to generate the first synthetic TS signal c11. , The first synthetic TS signal c11 is output. The first synthetic TS signal c11 is output to the outside (decoder or the like) via the output terminal 11z.

The second synthesis unit 123 synthesizes a plurality of TS signals including the second internal TS signal ts2 and the fourth internal TS signal ts4, and outputs the second synthesized TS signal c12. Specifically, the second internal TS signal ts2 output from the second demodulation unit 121 is input to the second synthesis unit 123, and the second input TS is input via the input terminals 16 and 17, respectively. The signals t2a and t2b are input, and the fourth internal TS signal ts4 output from the second selection unit 122 is input. The second synthesis unit 123 synthesizes the second internal TS signal ts2, the second input TS signals t2a and t2b, and the fourth internal TS signal ts4 to generate the second synthetic TS signal c12. , The second synthetic TS signal c12 is output. The second synthetic TS signal c12 is output to the outside (decoder or the like) via the output terminal 12z.

That is, the demodulation module 100 outputs two systems of TS signals, the first synthetic TS signal c11 and the second synthetic TS signal c12.

When the demodulation module 100 has the above configuration, it is possible to have versatility in the form of the receiving device 101 using the demodulation module 100. For example, when receiving a multi-carrier system using four carrier waves, a form in which signals input from input terminals 11 to 14 are combined and a first synthesized TS signal c11 is output, and input terminals 11 to 13 are used. When designing the demodulation module 100, it is possible to select a form in which the signals input from the above and 15 are combined and the first synthesized TS signal c11 is output.

[1-3. Receiver configuration]
Here, the configuration of the receiving device 101 including the demodulation module 100 will be described with reference to FIGS. 5A and 5B.

As described above, FIG. 5A is a diagram showing the configuration of the receiving device 101 including the demodulation module 100. FIG. 5B is a diagram showing a situation of a signal transmitted in the demodulation module 100. In FIG. 5B, the “◯” mark indicates that the signal is valid.

The receiving device 101 includes a plurality of RF units, a plurality of demodulation units, and a demodulation module 100. The plurality of RFs are composed of an RF unit 61, an RF unit 62, an RF unit 63, an RF unit 64, an RF unit 65, an RF unit 66, an RF unit 67, and an RF unit 68. The plurality of demodulation units are composed of a demodulation unit 72, a demodulation unit 73, a demodulation unit 74, a demodulation unit 76, a demodulation unit 77, and a demodulation unit 78.

The RF units 61 to 68 take out a signal in a desired frequency band from a broadcast wave transmitted by a communication cable or the like, convert it into a predetermined IF frequency, and output the signal. The RF unit 61 outputs the converted first IF signal i11 to the input terminal 11 of the demodulation module 100. The RF units 62 to 64 output the converted signal to the demodulation units 72 to 74. The RF unit 65 outputs the converted second IF signal i12 to the input terminal 15 of the demodulation module 100. The RF units 66 to 68 output the converted signal to the demodulation units 76 to 78.

The demodulation units 72 to 74 perform demodulation processing based on the signals output from the RF units 62 to 64, and send the first input TS signals t1a, t1b, and t1c to the input terminals 12, 13, and 14 of the demodulation module 100. Output. The demodulation units 76 to 78 perform demodulation processing based on the signals output from the RF units 66 to 68, and send the second input TS signals t2a, t2b, and t2c to the input terminals 16, 17, and 18 of the demodulation module 100. Output.

When the two contents of the input broadcast signal are different contents from each other, the first selection unit 112 of the demodulation module 100 is set to select the signal input from the input terminal 14. That is, the first selection unit 112 is set to output the first input TS signal t1c as the third internal TS signal ts3 (see FIG. 5B). On the other hand, the second selection unit 122 is set to select a signal input from the input terminal 18. That is, the second selection unit 122 is set to output the second input TS signal t2c as the fourth internal TS signal ts4 (see FIG. 5B). The settings of the first selection unit 112 and the second selection unit 122 are, for example, settings that are incorporated in advance when the demodulation module 100 is manufactured, but are not limited to the settings, and can be adjusted later by a user who uses the demodulation module 100. It may be a setting.

In the receiving device 101 having the above configuration, for example, it is possible to simultaneously receive two channels of digital broadcasting of a plurality of carrier waves using four carrier waves.

Further, in the receiving device 101, the components required for the demodulation process are the demodulation units 72, 73, 74, 76, 77, 78 and the demodulation module 100, for a total of seven. For example, two demodulation modules 1000 of Comparative Example 1 are used. Compared to the receiving device used, the number of parts can be reduced.

[1-4. Modification 1 of the first embodiment]
The demodulation module 100A according to the first modification of the first embodiment will be described with reference to FIGS. 6A and 6B. In the first modification, an example in which a broadcast signal having a plurality of carrier waves is input only to the RF units 61, 62, 63, and 65 will be described.

The demodulation module 100A of the first modification demodulates and outputs a broadcast signal of a digital broadcast in which one content is divided into a plurality of carrier waves and transmitted in parallel.

FIG. 6A is a block configuration diagram showing a receiving device 101 including the demodulation module 100A according to the first modification. FIG. 6B is a diagram showing a situation of a signal transmitted in the demodulation module 100A according to the first modification. In FIG. 6B, the “◯” mark indicates that the signal is valid, and the “N / A” indicates that the signal is not input or unnecessary.

As shown in FIG. 6A, the receiving device 101 includes a plurality of RF units, a plurality of demodulation units, and a demodulation module 100A. The plurality of RFs are composed of an RF unit 61, an RF unit 62, an RF unit 63, and an RF unit 65. The plurality of demodulation units are composed of a demodulation unit 72 and a demodulation unit 73.

The RF units 61 to 63 and 65 take out a signal in a desired frequency band from a broadcast wave transmitted by a communication cable or the like, convert it into a predetermined IF frequency, and output the signal. The RF unit 61 outputs the converted first IF signal i11 to the input terminal 11 of the demodulation module 100A. The RF units 62 and 63 output the converted signal to the demodulation units 72 and 73. The RF unit 65 outputs the converted second IF signal i12 to the input terminal 15 of the demodulation module 100A.

The demodulation units 72 and 73 perform demodulation processing based on the signals output from the RF units 62 and 63 corresponding to the demodulation units 72 and 73, and the first input TS signals t1a and t1b are input terminals of the demodulation module 100A. Output to 12 and 13.

The first selection unit 112 of the demodulation module 100A is set to select the second internal TS signal ts2 output from the second demodulation unit 121 when the two contents of the input broadcast signal are the same contents. Will be done. That is, the first selection unit 112 outputs the second internal TS signal ts2 as the third internal TS signal ts3 (see FIG. 6B). The first synthesis unit 113 synthesizes a plurality of TS signals and outputs the first synthetic TS signal c11. On the other hand, the second selection unit 122 is set so that nothing is selected, and nothing is output from the second synthesis unit 123 (see ts4 and c12 in FIG. 6B).

The receiving device 101 having the demodulation module 100A of the first modification can receive, for example, a digital broadcast of one group of carrier waves using four carrier waves.

Further, in this case, in the receiving device 101, the parts required for the demodulation processing are a total of three demodulation units 72, 73 and the demodulation module 100A. The number of parts can be reduced as compared with the case where parts are required.

[1-5. Modification 2 of the first embodiment]
The demodulation module 100B according to the second modification of the first embodiment will be described with reference to FIG. 7. In the second modification, an example in which the demodulation module 100B further includes a third selection unit 132 and a fourth selection unit 142 will be described.

FIG. 7 is a block configuration diagram showing the demodulation module 100B according to the second modification of the first embodiment.

The demodulation module 100B according to the second modification has a third selection unit 132 in the first processing unit 110 and a fourth selection unit 142 in the second processing unit 120, in addition to the configuration of the demodulation module 100 in FIG. Have.

The third selection unit 132 is arranged on the wiring path connecting the first synthesis unit 113 and the output terminal 11z. The first synthetic TS signal c11 output from the first synthesis unit 113 is input to the third selection unit 132, and the first internal TS signal ts1 output from the first demodulation unit 111 is input to the third selection unit 132. .. The third selection unit 132 selects one of the first combined TS signal c11 and the first internal TS signal ts1, and uses the selected signal as the first selection signal s11 as the first selection signal s11 and externally via the output terminal 11z. Output to. The first selection signal s11 is a signal belonging to the TS signal. In this way, the third selection unit 132 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 100B.

For example, the third selection unit 132 selects the first internal TS signal ts1 output from the first demodulation unit 111 when the broadcasting system demodulated by the first demodulation unit 111 is not a plurality of carrier wave system. On the other hand, when the broadcasting system demodulated by the first demodulation unit 111 is a multi-carrier system, the third selection unit 132 selects the first synthetic TS signal c11 output from the first synthesis unit 113.

The fourth selection unit 142 is arranged on the wiring path connecting the second synthesis unit 123 and the output terminal 12z. The second synthetic TS signal c12 output from the second synthesis unit 123 is input to the fourth selection unit 142, and the second internal TS signal ts2 output from the second demodulation unit 121 is input to the fourth selection unit 142. .. The fourth selection unit 142 selects one of the second combined TS signal c12 and the second internal TS signal ts2, and uses the selected signal as the second selection signal s12, and uses the selected signal as the second selection signal s12, which is external via the output terminal 12z. Output to. The second selection signal s12 is a signal belonging to the TS signal. In this way, the fourth selection unit 142 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 100B.

For example, the fourth selection unit 142 selects the second internal TS signal ts2 output from the second demodulation unit 121 when the broadcasting system demodulated by the second demodulation unit 121 is not a plurality of carrier wave system. On the other hand, when the broadcasting system demodulated by the second demodulation unit 121 is a multi-carrier system, the fourth selection unit 142 selects the second synthetic TS signal c12 output from the second synthesis unit 123.

According to the demodulation module 100B of the second modification, it is possible to output a stream of terrestrial digital broadcasting or cable broadcasting (single carrier wave) from the output terminal 12z while outputting a stream of a multi-carrier transmission method from the output terminal 11z.

FIG. 8A is a block configuration diagram showing a receiving device 101 including the demodulation module 100B according to the second modification. FIG. 8B is a diagram showing a situation of a signal transmitted in the demodulation module 100B according to the second modification. In FIG. 8B, the “◯” mark indicates that the signal is valid, and the “N / A” indicates that the signal is not input or unnecessary.

As shown in FIG. 8A, the receiving device 101 includes a plurality of RF units, a plurality of demodulation units, and a demodulation module 100B. The plurality of RFs are composed of an RF unit 61, an RF unit 62, an RF unit 63, an RF unit 64, and an RF unit 65. The plurality of demodulation units are composed of a demodulation unit 72, a demodulation unit 73, and a demodulation unit 74.

In the second modification, the RF units 61 to 64 receive signals of a plurality of carrier waves, and the RF units 65 receive signals of a single carrier wave. The RF units 61 to 65 take out a signal in a desired frequency band from a broadcast wave transmitted by a communication cable or the like, convert it into a predetermined IF frequency, and output the signal. The RF unit 61 outputs the converted first IF signal i11 to the input terminal 11 of the demodulation module 100B. The RF units 62 to 64 output the converted signal to the demodulation units 72 to 74. The RF unit 65 outputs the converted second IF signal i12 to the input terminal 15 of the demodulation module 100B.

The demodulation units 72 to 74 perform demodulation processing based on the signals output from the RF units 62 to 64 corresponding to the demodulation units 72 to 74, and the first input TS signals t1a, t1b, and t1c of the demodulation module 100B. Output to input terminals 12, 13 and 14.

In the second modification, the first selection unit 112 of the demodulation module 100B selects the signal of the input terminal 14. That is, the first selection unit 112 is set to output the first input TS signal t1c as the third internal TS signal ts3 (see FIG. 8B).

The first synthesis unit 113 synthesizes the first internal TS signal ts1 input from the first demodulation unit 111 and the first input TS signals t1a, t1b, t1c input from the input terminals 12, 13 and 14. Then, the first synthetic TS signal c11 is output to the third selection unit 132.

The third selection unit 132 selects the first synthetic TS signal c11 and outputs it to the output terminal 11z as the first selection signal s11. On the other hand, the fourth selection unit 142 selects the second internal TS signal ts2 input from the second demodulation unit 121 and outputs it to the output terminal 12z as the second selection signal s12.

In the receiving device 101 having the demodulation module 100B of the second modification, the stream of the multi-carrier transmission method is output from the output terminal 11z, and the stream of terrestrial digital broadcasting or cable broadcasting (single carrier) is output from the output terminal 12z. Can be done.

In the above, an example in which the first internal TS signal ts1 and the first synthetic TS signal c11 are input to the third selection unit 132 is shown, but the present invention is not limited thereto. For example, the first input TS signals t1a to t1c are further input to the third selection unit 132 via the input terminals 12 to 14, and the third selection unit 132 is the first input TS signal t1a, t1b or You may select t1c and output the selected signal as the first selection signal s11. Similarly, in the above, an example in which the second internal TS signal ts2 and the second synthetic TS signal c12 are input to the fourth selection unit 142 is shown, but the present invention is not limited thereto. For example, the second input TS signals t2a to t2c are further input to the fourth selection unit 142 via the input terminals 16 to 18, and the fourth selection unit 142 is the second input TS signal t2a, t2b or. You may select t2c and output the selected signal as the second selection signal s12.

[1-6. Modification 3 of the first embodiment]
The demodulation module 100C according to the third modification of the first embodiment will be described with reference to FIGS. 9A and 9B. In the third modification, an example in which the receiving device 101 includes the demodulation module 100B and the demodulation module 100C will be described.

FIG. 9A is a block configuration diagram showing a receiving device 101 including the demodulation module 100C according to the third modification. FIG. 9B is a diagram showing a situation of a signal transmitted in the demodulation module 100C according to the modification 3. In FIG. 9B, the “◯” mark indicates that the signal is valid, and the “N / A” indicates that the signal is not input or unnecessary.

As shown in FIG. 9A, the receiving device 101 includes a plurality of RF units, one demodulation unit 74, a demodulation module 100C, and a demodulation module 100B. The plurality of RFs are composed of an RF unit 61, an RF unit 62, an RF unit 63, an RF unit 64, and an RF unit 65. In the third modification, the demodulation module 100C is arranged on the wiring path connecting the RF units 62 and 63 and the demodulation module 100B. The demodulation module 100C has the same specifications as the demodulation module 100B.

In the third modification, the third selection unit 132 of the demodulation module 100C selects the first internal TS signal ts1 output from the first demodulation unit 111 (see FIG. 9B) and outputs it to the input terminal 12 of the demodulation module 100B. do. Further, the fourth selection unit 142 selects the second internal TS signal ts2 output from the second demodulation unit 121 (see FIG. 9B) and outputs the second internal TS signal ts2 to the input terminal 13 of the demodulation module 100B.

Also in the receiving device 101 including the demodulation modules 100B and 100C shown in FIG. 9A, the number of parts can be reduced. Further, it is possible to output a stream of terrestrial digital broadcasting or cable broadcasting (single carrier wave) from the output terminal 12z while outputting a stream of a multi-carrier transmission method from the output terminal 11z, and reception using the demodulation modules 100B and 100C. The design of the device 101 can be made flexible.

[1-7. Effect, etc.]
The demodulation module 100 of the present embodiment is a demodulation module that demodulates a broadcast signal of a digital broadcast in which at least one of one or more contents is divided into a plurality of carrier waves and transmitted in parallel, and outputs a TS signal. The first IF signal i11 generated from one of the plurality of carrier waves and the first input TS signal t1c are input to the first processing unit 110, and the second processing unit 110 generated from one of the plurality of carrier waves. A second processing unit 120 to which the IF signal i12 is input is provided. The first processing unit 110 has a first demodulation unit 111, a first selection unit 112, and a first synthesis unit 113, and the second processing unit 120 has a second demodulation unit 121. The first demodulation unit 111 demodulates the first IF signal i11 input to the first processing unit 110, outputs the first internal TS signal ts1 based on the demodulation processing, and the second demodulation unit 121 The second IF signal i12 input to the second processing unit 120 is demodulated, and the second internal TS signal ts2 based on the demodulation processing is output. The first selection unit 112 receives the first input TS signal t1c and the second internal TS signal ts2, and selects and selects either the first input TS signal t1c or the second internal TS signal ts2. The signal is output as a third internal TS signal ts3. The first synthesis unit 113 synthesizes a plurality of TS signals including the first internal TS signal ts1 and the third internal TS signal ts3, and outputs the first synthetic TS signal c11.

In this way, the TS signal output from the demodulation module 100 can be changed by selecting either the first input TS signal t1c or the second internal TS signal ts2. Thereby, it is possible to provide a highly versatile demodulation module 100 that can correspond to various reception forms.

Further, in the broadcast signal, at least one of the two contents is divided into a plurality of carrier waves and transmitted in parallel, and the first IF signal i11 and the first input TS signal t1c are one of the two contents. It is a signal generated based on the broadcast signal of the content, and the second IF signal i12 may be a signal generated based on the broadcast signal of the other content of the two contents.

According to this, the TS signal output from the demodulation module 100 can be changed by using one content and the other content. Thereby, it is possible to provide a highly versatile demodulation module 100 that can correspond to various reception forms.

Further, the two contents are different contents from each other, and the first selection unit 112 may select the first input TS signal t1c and output it as the third internal TS signal ts3.

According to this, the TS signal output from the demodulation module 100 can be determined based on the third internal TS signal ts3. This makes it possible to provide the demodulation module 100 corresponding to a predetermined reception mode.

Further, the second processing unit 120 further has a second selection unit 122 and a second synthesis unit 123, and the second selection unit 122 has a second input TS signal t2c and a second input TS signal t2c based on the broadcast signal of the other content. The internal TS signal ts1 of 1 may be input, either the second input TS signal t2c or the first internal TS signal ts1 may be selected, and the selected signal may be output as the fourth internal TS signal ts4. The second synthesis unit 123 may synthesize a plurality of TS signals including the second internal TS signal ts2 and the fourth internal TS signal ts4, and output the second synthesized TS signal c12.

In this way, the TS signal output from the demodulation module 100 can be changed by selecting either the second input TS signal t2c or the first internal TS signal ts1. Thereby, it is possible to provide a highly versatile demodulation module 100 that can correspond to various reception forms.

Further, the first processing unit 110 further has a third selection unit 132, the second processing unit 120 further has a fourth selection unit 142, and the third selection unit 132 has a first internal TS. The signal ts1 and the first synthetic TS signal c11 are input, one of the first internal TS signal ts1 and the first synthetic TS signal c11 is selected, and the selected signal is output as the first selection signal s11. May be good. The second internal TS signal ts2 and the second synthetic TS signal c12 are input to the fourth selection unit 142, and either the second internal TS signal ts2 or the second synthetic TS signal c12 is selected and selected. The signal may be output as the second selection signal s12.

According to this, the TS signal output from the demodulation module 100B can be changed by using the third selection unit 132 and the fourth selection unit 142. Thereby, it is possible to provide a highly versatile demodulation module 100B that can correspond to various reception forms.

Further, in the broadcast signal, one content is divided into a plurality of carrier waves and transmitted in parallel, and the first IF signal i11, the first input TS signal t1c and the second IF signal i12 are one content. It is a signal generated based on the broadcast signal, and the first selection unit 112 may output the second internal TS signal ts2 as the third internal TS signal ts3.

According to this, the TS signal output from the demodulation module 100A can be determined based on the third internal TS signal ts3. This makes it possible to provide the demodulation module 100A corresponding to a predetermined reception mode.

Further, the first processing unit 110 further has a third selection unit 132, the second processing unit 120 further has a fourth selection unit 142, and the third selection unit 132 has a first internal TS. The signal ts1 and the first synthetic TS signal c11 are input, one of the first internal TS signal ts1 and the first synthetic TS signal c11 is selected, and the selected signal is output as the first selection signal s11. May be good. The second internal TS signal ts2 may be input to the fourth selection unit 142, and the second internal TS signal ts2 may be output as the second selection signal s12.

According to this, the TS signal output from the demodulation module 100B can be changed by using the third selection unit 132 and the fourth selection unit 142. Thereby, it is possible to provide a highly versatile demodulation module 100B that can correspond to various reception forms.

In the demodulation modules 100 to 100B of the first and second embodiments, the input terminals 11 to 18 and the output terminals 11z and 12z are a group of terminals and are composed of one or more terminal pins. For example, the input terminals 12 to 14 and 16 to 18 are composed of at least two clocks and data for inputting a TS signal, and if necessary, a packet SYNC signal indicating the beginning of the packet and an effective section of data. It may have a terminal for inputting a Valid signal or the like indicating. When the data is input in parallel, the data may be a plurality of bits (for example, 2 bits or 8 bits) instead of 1 bit, and the number of terminals may be provided accordingly. The output terminals may also be provided with the number of terminals according to the number of output bits. Further, for example, the input terminal 11 may have two pins as a differential signal of the IF signal.

The demodulation modules 100 to 100B may be constructed by combining a plurality of chips, or each may be configured by one LSI (Large Scale Integration).

Further, in the first embodiment, the plurality of carrier wave system has been described as a configuration using four carrier waves, but the present invention is not limited to this, and the carrier wave may be two waves or three waves. In that case, the number of RF units and demodulation units required for the number of carrier waves may be used for synthesis using any input terminal.

(Embodiment 2)
[2-1. Background to this disclosure]
The process leading to this disclosure will be described with reference to FIG. 10, which is Comparative Example 2.

In order to record the back program of the TV, the broadcast signals of multiple channels (Channels) are input to multiple RF units (tuners), the signals output from the multiple RF units are digitally converted and demodulated, and then multiple. A receiving device that outputs the TS signal of the above is known.

FIG. 10 is a block configuration diagram showing the demodulation module 2000 of Comparative Example 2.

The demodulation module 2000 of Comparative Example 2 includes an AD conversion unit 2210, an AD conversion unit 2220, a demodulation error correction unit 2230, and a demodulation error correction unit 2240.

In the receiving device of Comparative Example 2, the broadcast wave is selected by the RF unit (not shown), converted into an IF signal or a baseband signal, and the converted RF output signal is output to the demodulation module 2000. In this demodulation module 2000, after the RF output signal is AD-converted by the AD conversion unit 2210, the demodulation error correction unit 2230 performs demodulation and error correction, and outputs the TS signal. Similarly, in the demodulation module 2000, after the RF output signal is AD-converted by the AD conversion unit 2220, the demodulation error correction unit 2240 performs demodulation and error correction, and outputs the TS signal. As a result, the same or different channels are received and two TS signals are output.

In the receiving device, when the receiving device is newly installed or moved, a channel search is performed as the first channel setting. By this channel search, the channel information that can be received in the installed reception environment is acquired.

In the channel search, the reception availability of all channels is sequentially confirmed by the operation of only one system, but since the transmission parameter is unknown when performing the demodulation processing, for example, in order to confirm the reception availability of one channel, for example. It is necessary to confirm whether or not reception is possible with the 64QAM (Quadrature Amplitude Modulation) setting, and then confirm whether or not reception is possible with the 256QAM setting, which causes a problem that the confirmation time for receiving or not receiving one channel becomes long. be.

On the other hand, the demodulation module of the present disclosure has the following configuration, so that it can be used with high flexibility by supporting various reception modes such as 64QAM or 256QAM.

[2-2. Demodulation module configuration]
The demodulation module 200 according to the second embodiment will be described with reference to FIGS. 11A and 11B. The demodulation module 200 is a module that demodulates a broadcast signal of digital broadcasting and outputs two TS signals. In the present embodiment, the video / audio output format will be described as TS, but the present invention is not limited to this, and the output format of the TLV packet may be TS.

FIG. 11A is a block configuration diagram showing the demodulation module 200 according to the second embodiment.

As shown in FIG. 11A, the demodulation module 200 includes a first AD conversion unit 210, a second AD conversion unit 220, a first demodulation error correction unit 230, a second demodulation error correction unit 240, and a TS selection unit 250. I have. Further, the demodulation module 200 includes input terminals 21 and 22 and output terminals 21z and 22z.

The input terminal 21 is connected to the first AD conversion unit 210, and the input terminal 22 is connected to the second AD conversion unit 220. The output side of the first AD conversion unit 210 is connected to the first demodulation error correction unit 230, and the output side of the second AD conversion unit 220 is connected to the second demodulation error correction unit 240. The output side of the first demodulation error correction unit 230 is connected to the TS selection unit 250, and the output side of the second demodulation error correction unit 240 is connected to the TS selection unit 250 and the output terminal 22z, respectively. The output side of the TS selection unit 250 is connected to the output terminal 21z.

The first IF signal i21 is input to the input terminal 21, and the second IF signal i22 is input to the input terminal 22. The first IF signal i21 and the second IF signal i22 are signals generated by RF processing or the like of the broadcast signal.

The first IF signal i21 generated based on the broadcast signal is input to the first AD conversion unit 210. The first AD conversion unit 210 performs AD conversion processing on the first IF signal i21 and generates a first conversion signal c21 based on the AD conversion processing. The first AD conversion unit 210 outputs the first conversion signal c21 to the first demodulation error correction unit 230.

The first demodulation error correction unit 230 performs a first demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing on the first conversion signal c21, and performs the first demodulation process in the first demodulation process. The first TS signal t21 based on the above is generated. The first demodulation error correction unit 230 outputs the first TS signal t21 to the TS selection unit 250.

The second AD conversion unit 220 inputs the second IF signal i22 generated based on the broadcast signal. The second AD conversion unit 220 performs AD conversion processing on the second IF signal i22, and generates a second conversion signal c22 based on the AD conversion processing. The second AD conversion unit 220 outputs the second conversion signal c22 to the second demodulation error correction unit 240.

The second demodulation error correction unit 240 performs a second demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process on the second conversion signal c22, and performs the second demodulation process in the second demodulation process. Generates a second TS signal t22 based on this. The second demodulation error correction unit 240 outputs the second TS signal t22 to the TS selection unit 250 and the output terminal 22z.

The first TS signal t21 and the second TS signal t22 are input to the TS selection unit 250. The TS selection unit 250 selects one of the TS signals of the first TS signal t21 and the second TS signal t22, and outputs the selected signal to the output terminal 21z. In this way, the TS selection unit 250 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 200.

The demodulation module 200 can output two systems of TS signals, a first TS signal t21 and a second TS signal t22, by the TS selection unit 250, and also has a second TS signal t22. It is possible to output the TS signal of the system.

The demodulation module 200 has a first mode M21 that normally receives broadcast signals of a plurality of channels, and a second mode M22 that receives receivable broadcast signals in parallel. The first mode M21 can be used when receiving a digital broadcast for the purpose of viewing and recording a broadcast program. The second mode M22 can be used when only one TS output is required, for example, channel search.

The TS selection unit 250 selects the first TS signal t21 output from the first demodulation error correction unit 230 in the first mode M21. That is, the demodulation module 200 has the first TS signal t21 and the first TS signal t21 generated by the first demodulation error correction unit 230 and the second demodulation error correction unit 240 in a state where the same or different channels are selected in the two RF units. The second TS signal t22 is output from the output terminals 21z and 22z.

Further, the TS selection unit 250 selects the TS signal that has been demodulated correctly from the first TS signal t21 and the second TS signal t22 in the second mode M22. That is, the demodulation module 200 performs demodulation processing with different reception settings in the first demodulation error correction unit 230 and the second demodulation error correction unit 240 in a state where the same channel is selected in the two RF units. For example, the first demodulation error correction unit 230 performs demodulation processing with the 64QAM setting, and the second demodulation error correction unit 240 performs demodulation processing with the 256QAM setting. Then, the TS selection unit 250 selects the output of the first demodulation error correction unit 230 and the second demodulation error correction unit 240 that can be demodulated correctly, and outputs the output from the output terminal 21z.

The index of whether or not the first demodulation error correction unit 230 and the second demodulation error correction unit 240 have been correctly demodulated is determined based on, for example, a synchronization signal from each demodulation error correction unit, an error-free flag, or the like. To.

FIG. 11B is a diagram showing a form of a signal transmitted in the demodulation module 200. FIG. 11B shows a signal of the input terminal 22 in the first mode M21 and the second mode M22, and a signal selected by the TS selection unit 250.

As shown in FIG. 11B, the demodulation module 200 may output two TS signals (first TS signal t21 and second TS signal t22) in the first mode M21 as in Comparative Example 2. can. Further, in the second mode M22, it is possible to confirm whether or not reception is possible at the same time with different reception settings, and select and output the TS signal output from the demodulation error correction unit that is capable of reception.

This makes it possible to provide a demodulation module 200 that can be used with high flexibility corresponding to a plurality of reception modes. Further, in the second mode M22, the time for receiving broadcast signals in parallel and completing the channel search can be shortened.

[2-3. Modification 1 of the second embodiment]
The demodulation module 200A according to the first modification of the second embodiment will be described with reference to FIGS. 12A and 12B. In the first modification, an example in which the demodulation module 200A includes the first selection unit 260 in addition to the TS selection unit 250 will be described.

FIG. 12A is a block configuration diagram showing the demodulation module 200A according to the first modification of the second embodiment.

The demodulation module 200A of the first modification has a first AD conversion unit 210, a second AD conversion unit 220, a first demodulation error correction unit 230, a second demodulation error correction unit 240, a TS selection unit 250, and a first selection. It is provided with a unit 260. Further, the demodulation module 200A includes input terminals 21 and 22 and output terminals 21z and 22z.

The input terminal 21 is connected to the first AD conversion unit 210, and the input terminal 22 is connected to the second AD conversion unit 220. The output side of the first AD conversion unit 210 is connected to the first demodulation error correction unit 230 and the first selection unit 260, and the output side of the second AD conversion unit 220 is connected to the first selection unit 260. The output side of the first selection unit 260 is connected to the second demodulation error correction unit 240. The output side of the first demodulation error correction unit 230 is connected to the TS selection unit 250, and the output side of the second demodulation error correction unit 240 is connected to the TS selection unit 250 and the output terminal 22z, respectively. The output side of the TS selection unit 250 is connected to the output terminal 21z.

The first IF signal i21 is input to the input terminal 21, and the second IF signal i22 is input to the input terminal 22. The first IF signal i21 and the second IF signal i22 are signals generated by RF processing or the like of the broadcast signal.

The first AD conversion unit 210 inputs the first IF signal i21 generated based on the broadcast signal. The first AD conversion unit 210 performs AD conversion processing on the first IF signal i21 and generates a first conversion signal c21 based on the AD conversion processing. The first AD conversion unit 210 outputs the first conversion signal c21 to the first demodulation error correction unit 230 and the first selection unit 260.

The first demodulation error correction unit 230 performs a first demodulation process including at least one process of synchronization processing, waveform equalization processing, and error correction processing on the first conversion signal c21, and performs the first demodulation process in the first demodulation process. The first TS signal t21 based on the above is generated. The first demodulation error correction unit 230 outputs the first TS signal t21 to the TS selection unit 250.

The second AD conversion unit 220 inputs the second IF signal i22 generated based on the broadcast signal. The second AD conversion unit 220 performs AD conversion processing on the second IF signal i22, and generates a second conversion signal c22 based on the AD conversion processing. The second AD conversion unit 220 outputs the second conversion signal c22 to the first selection unit 260.

The first conversion signal c21 and the second conversion signal c22 are input to the first selection unit 260. The first selection unit 260 selects one of the conversion signals of the first conversion signal c21 and the second conversion signal c22, and uses the selected signal as the first selection signal s26 to the second demodulation error correction unit 240. Output. In this way, the first selection unit 260 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 200A.

The second demodulation error correction unit 240 performs a second demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process on the input first selection signal s26, and the second demodulation error correction unit 240 performs a second demodulation process. A second TS signal t22 based on the demodulation process is generated. The second demodulation error correction unit 240 outputs the second TS signal t22 to the TS selection unit 250 and the output terminal 22z.

The first TS signal t21 and the second TS signal t22 are input to the TS selection unit 250. The TS selection unit 250 selects one of the TS signals of the first TS signal t21 and the second TS signal t22 and outputs the TS signal to the output terminal 21z.

The first selection unit 260 selects the second conversion signal c22 output from the second AD conversion unit 220 in the first mode M21 for receiving the two channels, and uses this as the first selection signal s26 for the second demodulation. Output to the error correction unit 240. That is, the demodulation module 200A has the first TS signal t21 and the second TS signal generated by the first demodulation error correction unit 230 and the second demodulation error correction unit 240 in a state where the same or different channels are selected. t22 is output from the output terminals 21z and 22z.

On the other hand, the first selection unit 260 selects the first conversion signal c21 in the second mode M22 that receives channels in parallel, and outputs this as the first selection signal s26.

FIG. 12B is a diagram showing a form of a signal transmitted in the demodulation module 200A. FIG. 12B shows a signal selected by the first selection unit 260 and a signal selected by the TS selection unit 250 in the first mode M21 and the second mode M22.

As shown in FIG. 12B, the demodulation module 200A can output two TS signals in the first mode M21 as in Comparative Example 2. Further, in the second mode M22, it is possible to confirm whether or not reception is possible at the same time with different reception settings, and select and output the TS signal output from the demodulation error correction unit that is capable of reception.

This makes it possible to provide a demodulation module 200A that can realize a plurality of reception modes and can be used with high flexibility.

Further, in the second mode M22, in the demodulation module 200 of the second embodiment, it is necessary to set the same channel in the two RF units, but in the demodulation module 200A of the modification 1, the output is output from the first AD conversion unit 210. Since the first conversion signal c21 is selected, the signal of the input terminal 22 becomes unnecessary, and the channel selection (tuning) of the RF unit connected to the input terminal 22 becomes unnecessary.

Further, in the demodulation module 200A of the modification 1, when only one system of TS signals is always output, even when the demodulation module 200A is used in the second mode M22, the input to the input terminal 22 is not always required. In this case, only one RF unit is required for the receiving device, and the number of parts can be reduced.

[2-4. Modification 2 of the second embodiment]
The demodulation module 200B according to the second modification of the second embodiment will be described with reference to FIGS. 13A and 13B. In the second modification, an example in which the demodulation module 200B includes the second selection unit 270 in addition to the TS selection unit 250 will be described.

FIG. 13A is a block configuration diagram showing the demodulation module 200B according to the second modification of the second embodiment.

The demodulation module 200B of the second modification has a first AD conversion unit 210, a second AD conversion unit 220, a first demodulation error correction unit 230, a second demodulation error correction unit 240, a TS selection unit 250, and a second selection. It is provided with a unit 270 and. Further, the demodulation module 200B includes input terminals 21 and 22 and output terminals 21z and 22z.

The input terminal 21 is connected to the first AD conversion unit 210 and the second selection unit 270, and the input terminal 22 is connected to the second selection unit 270. The output side of the second selection unit 270 is connected to the second AD conversion unit 220. The output side of the first AD conversion unit 210 is connected to the first demodulation error correction unit 230, and the output side of the second AD conversion unit 220 is connected to the second demodulation error correction unit 240. The output side of the first demodulation error correction unit 230 is connected to the TS selection unit 250, and the output side of the second demodulation error correction unit 240 is connected to the TS selection unit 250 and the output terminal 22z, respectively. The output side of the TS selection unit 250 is connected to the output terminal 21z.

The first IF signal i21 is input to the input terminal 21, and the second IF signal i22 is input to the input terminal 22. The first IF signal i21 and the second IF signal i22 are signals generated by RF processing or the like of the broadcast signal.

The first AD conversion unit 210 inputs the first IF signal i21 generated based on the broadcast signal. The first AD conversion unit 210 performs AD conversion processing on the first IF signal i21 and outputs the first conversion signal c21.

The first demodulation error correction unit 230 performs the first demodulation process on the first conversion signal c21 and outputs the first TS signal t21.

The first IF signal i21 and the second IF signal i22 are input to the second selection unit 270. The second selection unit 270 selects an IF signal of either the first IF signal i21 or the second IF signal i22, and outputs the selected signal as the second selection signal s27 to the second AD conversion unit 220. In this way, the second selection unit 270 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 200B.

The second AD conversion unit 220 performs AD conversion processing on the input second selection signal s27, and generates a second conversion signal c22 based on the AD conversion processing. The second AD conversion unit 220 outputs the second conversion signal c22 to the second demodulation error correction unit 240.

The second demodulation error correction unit 240 performs a second demodulation process on the second conversion signal c22, and outputs the second TS signal t22 to the TS selection unit 250 and the output terminal 22z.

The TS selection unit 250 receives the first TS signal t21 and the second TS signal t22, selects one of the first TS signal t21 and the second TS signal t22, and sends it to the output terminal 21z. Output.

The second selection unit 270 selects the second IF signal i22 input via the input terminal 22 in the first mode M21 for receiving the two channels, and outputs the second IF signal i22 to the second AD conversion unit 220. That is, the demodulation module 200B has the first TS signal t21 and the second TS signal generated by the first demodulation error correction unit 230 and the second demodulation error correction unit 240 in a state where the same or different channels are selected. t22 is output from the output terminals 21z and 22z.

Further, the second selection unit 270 selects the first IF signal i21 input via the input terminal 21 in the second mode M22 for receiving channels in parallel.

FIG. 13B is a diagram showing a form of a signal transmitted in the demodulation module 200B. FIG. 13B shows a signal selected by the second selection unit 270 and a signal selected by the TS selection unit 250 in the first mode M21 and the second mode M22.

As shown in FIG. 13B, the demodulation module 200B can output two TS signals in the first mode M21 as in Comparative Example 2. Further, in the second mode M22, it is possible to confirm whether or not reception is possible at the same time with different reception settings, and select and output the TS signal output from the demodulation error correction unit that is capable of reception.

This makes it possible to provide a demodulation module 200B that can realize a plurality of reception modes and can be used with high flexibility.

Further, in the second mode M22, in the demodulation module 200 of the second embodiment, it is necessary to set the same channel in the two RF units, but in the demodulation module 200B of the second modification, the output is output from the first AD conversion unit 210. Since the first conversion signal c21 is selected, the signal of the input terminal 22 becomes unnecessary, and the selection of the RF unit connected to the input terminal 22 becomes unnecessary.

Further, in the demodulation module 200B of the modification 2, when only one TS signal is always output, even when the demodulation module 200B is used in the second mode M22, the input to the input terminal 22 is not always required. In this case, only one RF unit is required for the receiving device, and the number of parts can be reduced.

[2-5. Effect, etc.]
The demodulation module 200 of the present embodiment is a demodulator module that demolishes the broadcast signal of digital broadcasting and outputs two TS signals, and the first IF signal i21 generated based on the broadcast signal is input. Then, AD conversion processing is performed on the first IF signal i21, and synchronization processing is performed on the first conversion signal c21 and the first AD conversion unit 210 that outputs the first conversion signal c21 based on the AD conversion processing. A first demodulation error correction unit 230 that performs a first demographic processing including at least one processing of waveform equalization processing and an error correction processing and outputs a first TS signal t21 based on the first demographic processing, and a broadcast signal. The second IF signal i22 generated based on the above is input, the second IF signal i22 is subjected to AD conversion processing, and the second conversion signal c22 based on the AD conversion processing is output. And the second conversion processing including at least one processing of synchronization processing, waveform equalization processing, and error correction processing is performed on the second conversion signal c22, and the second TS signal t22 based on the second demographic processing is performed. The second demodulation error correction unit 240 and the first TS signal t21 and the second TS signal t22 are input, and one of the first TS signal t21 and the second TS signal t22 is selected. The TS selection unit 250 for output is provided.

According to this, the demodulation module 200 may output two TS signals (first TS signal t21 and second TS signal t22) separately, or output either one of the two TS signals. can. Thereby, it is possible to provide a highly versatile demodulation module 200 that can correspond to various reception forms.

Further, the demodulation module 200 has a first mode M21 and a second mode M22, and the TS selection unit 250 selects the first TS signal t21 in the first mode M21 and in the second mode M22. , The TS signal that has been demodulated correctly may be selected from the first TS signal t21 and the second TS signal t22.

According to this, the two TS signals are output separately in the first mode M21, or the TS signal that is correctly demodulated out of the two TS signals is output in the second mode M22. Can be done. Thereby, it is possible to provide a highly versatile demodulation module 200 that can correspond to various reception forms.

Further, the first mode M21 may be a mode for normally receiving broadcast signals of a plurality of channels, and the second mode M22 may be a mode for receiving receivable broadcast signals in parallel.

According to this, when the broadcast signal is normally received, the two TS signals can be output separately, or when the receivable broadcast signal is received in parallel, the two TS signals can be demodulated correctly. The TS signal can be output. Thereby, it is possible to provide a highly versatile demodulation module 200 that can correspond to various reception forms.

Further, the demodulation module 200A further receives the first conversion signal c21 and the second conversion signal c22, selects either the first conversion signal c21 or the second conversion signal c22, and selects the signal. Is provided as a first selection unit 260 that outputs the first selection signal s26. The first selection unit 260 outputs the second conversion signal c22 as the first selection signal s26 in the first mode M21, or outputs the first conversion signal c21 as the first selection signal in the second mode M22. It may be output as s26. The second demodulation error correction unit 240 receives the first selection signal s26 instead of the second conversion signal c22, performs the second demodulation process on the first selection signal s26, and performs the second demodulation process. The second TS signal t22 based on the processing may be output.

According to this, two TS signals can be output separately in the first mode M21, or one of the two TS signals can be output in the second mode M22. This makes it possible to provide a highly versatile demodulation module 200A capable of corresponding to various reception forms.

Further, the demodulation module 200B further receives the first IF signal i21 and the second IF signal i22, and selects either the first IF signal i21 or the second IF signal i22 for the second selection. A second selection unit 270 that outputs as a signal s27 is provided. The second selection unit 270 outputs the second IF signal i22 as the second selection signal s27 in the first mode M21, or outputs the first IF signal i21 as the second selection signal in the second mode M22. Output as s27. The second AD conversion unit 220 receives a second selection signal s27 in place of the second IF signal i22, performs AD conversion processing on the second selection signal s27, and performs a second AD conversion process based on the AD conversion process. The conversion signal c22 may be output.

According to this, two TS signals can be output separately in the first mode M21, or one of the two TS signals can be output in the second mode M22. Thereby, it is possible to provide a highly versatile demodulation module 200B that can correspond to various reception forms.

In the second embodiment, in the second mode M22, the first demodulation error correction unit 230 is set to 64QAM, the second demodulation error correction unit 240 is set to 256QAM, and the first demodulation error correction unit 230 and the second demodulation are set. The demodulation process was performed with different reception settings from the error correction unit 240, but the demodulation process is not limited to this. For example, the reception setting may be a setting such as 16QAM.

Further, the reception setting is common to the first demodulation error correction unit 230 and the second demodulation error correction unit 240 (for example, both are 64QAM), and other reception parameters are set to the first demodulation error correction unit 230 and the second demodulation unit 230. It may be changed by the error correction unit 240. Examples of the reception parameter when changing include the number of taps of the equalizer for waveform equalization, the step size, the loop filter coefficient of frequency synchronization and phase synchronization, and the like. The received signal is affected by various interferences such as multipath and narrowband interference, and there is a trade-off that it is strong against multipath environment but weak against narrowband interference due to the difference in these reception parameter settings. For the parameter group related to this trade-off, for example, the first demodulation error correction unit 230 is set as a parameter setting that emphasizes the multipath environment, and the second demodulation error correction unit 240 is set as a parameter setting that emphasizes narrow band interference. Or the TS signal with good reception conditions can be selected and output. This makes it possible to expand the reception environment that can be supported.

Further, the reception parameters that can be received by the channel search are stored in a memory (not shown), and the first demodulation error correction unit 230 or the second demodulation error is used by using the reception parameters stored in the memory at the time of normal reception. The processing of the correction unit 240 may be executed.

The demodulation modules 200 to 200B may be configured by combining a plurality of chips, or each may be configured by one LSI. Further, the input terminals 21 and 22, and the output terminals 21z and the output terminals 22z are a group of terminals and may be composed of one or more terminal pins.

(Embodiment 3)
[3-1. Background to this disclosure]
The process leading to this disclosure will be described with reference to FIGS. 14A and 14B, which are Comparative Examples 3.

A receiving device is known in which broadcast signals of a plurality of channels (Channels) are input to a plurality of RF units (tuners) in order to record a counterprogram of a TV. The receiving device has a built-in demodulation module that digitally converts and demodulates signals output from a plurality of RF units and then outputs a plurality of TS signals. In the present embodiment, the video / audio output format will be described as TS, but the present invention is not limited to this, and the output format of the TLV packet may be TS.

FIG. 14A is a block configuration diagram showing the demodulation module 3000 of Comparative Example 3.

The demodulation module 3000 of Comparative Example 3 includes a demodulation unit 3310, a demodulation unit 3320, a signal shaping unit 3330, and a signal shaping unit 3340. Further, the demodulation module 3000 includes input terminals 31, 32 and output terminals 31a, 32a.

Signals of the same or different channels output from the two RF units (not shown) are input to the input terminals 31 and 32.

The signal input via the input terminal 31 is subjected to AD conversion processing, demodulation processing, and error correction processing by the demodulation unit 3310. The signal output from the demodulation unit 3310 is shaped by the signal shaping unit 3330 so that the data format of the TS signal is a 1-bit serial format or an 8-bit parallel format. The formatted TS signal is output from the output terminal 31a.

The signal input via the input terminal 32 is subjected to AD conversion processing, demodulation processing, and error correction processing by the demodulation unit 3320. The signal output from the demodulation unit 3320 is shaped by the signal shaping unit 3340 so that the data format of the TS signal is a 1-bit serial format or an 8-bit parallel format. The formatted TS signal is output from the output terminal 32a.

The output terminals 31a and 32a are a group of terminals composed of at least one or more terminals.

FIG. 14B is a diagram showing terminal assignments of output terminals 31a and 32a of the demodulation module 3000 of Comparative Example 3.

The clock shown in FIG. 14B is a clock indicating the timing of TS data, the packet synchronization signal is a signal indicating the beginning of a packet, and the Valid signal is a signal indicating valid data. The data is data 0 in the 1-bit serial format and data 0 to 7 in the 8-bit parallel format. The general-purpose output signal is a signal that can be used for general purposes, and can be used to indicate the demodulation status (synchronization, presence / absence of error), and the like. By this terminal assignment, the same or different channels are received and two TS signals are output.

In recent years, it is desired to reduce the mounting area of the demodulation module, but it is difficult to reduce the size of the demodulation module because the demodulation module that receives such a plurality of channels has many terminals.

On the other hand, the demodulation module of the present disclosure has the following configurations, so that it has terminal assignments corresponding to various reception modes and can be used with high flexibility.

[3-2. Demodulation module configuration]
The configuration of the demodulation module 300 according to the third embodiment will be described with reference to FIGS. 15 to 19.

FIG. 15 is a block configuration diagram showing the demodulation module 300 according to the third embodiment.

As shown in FIG. 15, the demodulation module 300 includes a first demodulation unit 310, a second demodulation unit 320, a first signal shaping unit 330, a second signal shaping unit 340, and an output selection unit 350. Further, the demodulation module 300 includes input terminals 31, 32 and output terminals 31z, 32z.

The input terminal 31 is connected to the first demodulation unit 310, and the input terminal 32 is connected to the second demodulation unit 320. The output side of the first demodulation unit 310 is connected to the first signal shaping unit 330, and the output side of the second demodulation unit 320 is connected to the second signal shaping unit 340. The output side of the first signal shaping unit 330 and the second signal shaping unit 340 is connected to the output selection unit 350. The output side of the output selection unit 350 is connected to the output terminals 31z and 32z.

The first IF signal i31 is input to the input terminal 31, and the second IF signal i32 is input to the input terminal 32. The first IF signal i31 and the second IF signal i32 are signals generated by RF processing or the like of the broadcast signal.

The first IF signal i31 generated based on the broadcast signal is input to the first demodulation unit 310. The first demodulation unit 310 performs demodulation processing on the first IF signal i31 to generate a first TS signal t31, and outputs the first TS signal t31 to the first signal shaping unit 330.

The first signal shaping unit 330 shapes the first TS signal t31 to generate a first shaped TS signal f31 having a predetermined output format. For example, the first signal shaping unit 330 shapes the first TS signal t31 to generate a first shaped TS signal f31 having either a 1-bit format, a 2-bit format, or an 8-bit format. The first signal shaping unit 330 outputs the first shaped TS signal f31 to the output selection unit 350.

The second IF signal i32 generated based on the broadcast signal is input to the second demodulation unit 320. The second demodulation unit 320 performs demodulation processing on the second IF signal i32 to generate a second TS signal t32, and outputs the second TS signal t32 to the second signal shaping unit 340.

The second signal shaping unit 340 shapes the second TS signal t32 to generate a second shaped TS signal f32 having a predetermined output format. For example, the second signal shaping unit 340 shapes the second TS signal t32 to generate a second shaped TS signal f32 having either a 1-bit format, a 2-bit format, or an 8-bit format. The second signal shaping unit 340 outputs the second shaped TS signal f32 to the output selection unit 350.

The first shaped TS signal f31 and the second shaped TS signal f32 are input to the output selection unit 350. The output selection unit 350 distributes and outputs the first shaped TS signal f31 and the second shaped TS signal f32 to the first output terminal group G31 and the second output terminal group G32 (see FIG. 17). That is, the demodulation module 300 outputs two systems of TS signals, the first shaped TS signal f31 and the second shaped TS signal f32. In this way, the output selection unit 350 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 300.

The demodulation module 300 of the present embodiment has either a first output form M31 or a second output form M32.

In the first output mode M31, the first signal shaping unit 330 outputs the first shaped TS signal f31 in the 1-bit format, and the output selection unit 350 sends the first shaped TS signal f31 to the first output terminal group G31. The second signal shaping unit 340 outputs the second shaped TS signal f32 in the 1-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the second output terminal group G32. It is a form to do.

In the second output mode M32, the first signal shaping unit 330 outputs the first shaped TS signal f31 in 8-bit format, and the output selection unit 350 outputs the first shaped TS signal f31 to the first output terminal group G31. It is a form in which the output is divided into the second output terminal group G32.

That is, the output selection unit 350 simultaneously outputs the first shaped TS signal f31 and the second shaped TS signal f32, outputs only the first shaped TS signal f31, and the second shaped TS signal. The terminal assignment is changed depending on whether only f32 is output. Therefore, the output selection unit 350 has a function of selecting an output signal.

FIG. 16 is a block configuration diagram showing a receiving device 301 including a demodulation module 300. FIG. 17 is a diagram showing terminal assignments of the output terminals 31z and 32z of the demodulation module 300.

The output terminal 31z shown in FIG. 17 is a first output terminal group G31 composed of a plurality of terminals T1, T2, T3, T4, T5, and T6. The output terminal 32z shown in FIG. 17 is a second output terminal group G32 composed of a plurality of terminals T7, T8, T9, T10, T11, and T12. The demodulation module 300 may be composed of an LSI. In that case, the pitch of the terminal pins on the package is, for example, 0.4 mm or less, and the package size is, for example, 49 mm ² or less. The number of pins of the terminals of the terminal group may be 64 pins or less. When the Divad is used as an Exposed Pad, the number of pins of the terminal may be 65 pins or less. The terminals T1 to T6 are examples, and the number of terminals and the order of arrangement are not limited to this example. Further, the number of bits in parallel is not limited to 2 bits or 8 bits.

FIG. 16A and FIG. 17A show a demodulation module 300 having a first output mode M31. In the first output mode M31, only the first shaped TS signal f31 is output from the first output terminal group G31 (output terminal 31z) in the 1-bit serial format, and the second output terminal group G32 (output terminal 32z) is output in the 1-bit serial format. Only the second shaped TS signal f32 is output from. In the first output mode M31, a signal of only the 1-bit serial format is output instead of the 8-bit parallel format.

16 (b) and 17 (b) show a demodulation module 300 having a second output mode M32. In the second output mode M32, only the first shaped TS signal f31 is output from the first output terminal group G31 and the second output terminal group G32 in an 8-bit parallel format.

16 (c) and 17 (c) show terminal assignments in which only the first shaped TS signal f31 is output from the first output terminal group G31 in a 1-bit serial format.

16 (d) and 17 (d) show a demodulation module 300 having a third output mode M33. In the third output mode M33, the second signal shaping unit 340 outputs the second shaped TS signal f32 in 8-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the first output terminal group G31 and the first output terminal group G31. This is a form in which the output is divided into the second output terminal group G32. In the third output mode M33, the second shaped TS signal f32 is divided and output from the first output terminal group G31 and the second output terminal group G32 in an 8-bit parallel format.

16 (e) and 17 (e) show terminal assignments in which only the second shaped TS signal f32 is output from the output terminal 31z in a 1-bit serial format.

In the demodulation module 300, when the first shaped TS signal f31 and the second shaped TS signal f32 are output at the same time, the total number of terminals can be reduced by canceling the 8-bit parallel format. Further, when the demodulation module 300 is used as the output of one shaped TS signal (f31 or f32), by effectively using the surplus terminals, 8-bit parallel format output becomes possible as in Comparative Example 3. ..

In this way, by reducing the number of terminals of the demodulation module 300, it is possible to output TS signals of two channels while reducing the size of the demodulation module 300.

In the above, an example of shaping in a 1-bit serial format or an 8-bit parallel format by the first signal shaping unit 330 and the second signal shaping unit 340 has been described, but the present invention is not limited to this, and for example, shaping is performed in the 2-bit parallel format. You may. In the case of the 2-bit parallel format, the data may be 0 to 1.

FIG. 18 is a block configuration diagram showing a receiving device 301 including the demodulation module 300 of another example. FIG. 19 is a diagram showing terminal assignments of output terminals 31z and 32z of the demodulation module 300 of another example.

In (a) of FIG. 18 and (a) of FIG. 19, only the first shaped TS signal f31 is output from the first output terminal group G31 in the 2-bit parallel format, and from the second output terminal group G32 in the 2-bit parallel format. The terminal assignment in which only the second shaped TS signal f32 is output is shown.

FIG. 18B and FIG. 19B show a demodulation module 300 having a fourth output mode M34. In the fourth output mode M34, the second signal shaping unit 340 outputs the second shaped TS signal f32 having a 2-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the first output terminal group G31. It is a form to output only to. In the fourth output mode M34, the second shaped TS signal f32 is output from the first output terminal group G31 in a 2-bit parallel format.

With the terminal assignments shown in FIGS. 17 and 19, it is possible to provide a highly versatile demodulation module 300 corresponding to various reception modes.

[3-3. Modification 1 of the third embodiment]
The demodulation module 300A according to the first modification of the third embodiment will be described with reference to FIG.

FIG. 20 is a block configuration diagram showing a demodulation module 300A according to the first modification of the third embodiment.

The demodulation module 300A of the first modification has a configuration in which the second demodulation unit 320 and the second signal shaping unit 340 are excluded from the demodulation module 300 shown in FIG. 15, while the number and size of terminals in the demodulation module 300A are set. , The same as the demodulation module 300.

The demodulation module 300 of the third embodiment outputs two TS signals by two demodulation processes, whereas the demodulation module 300A of the modification 1 outputs one TS signal by one demodulation process. The number of terminals required for the demodulation module 300A is smaller than that for the demodulation module 300, but in the first modification, the number of terminals of the demodulation module 300A is the same as that of the demodulation module 300, and the shape is also the same. Further, the location of the terminal related to the component common to the demodulation module 300 in the demodulation module 300A is also the same as that of the demodulation module 300. This means that when the demodulation module 300 and the demodulation module 300A are realized as LSIs, the appearance shapes are the same.

With such a configuration, the number of input / output terminals and the shape of the module are the same for the demodulation module 300 that outputs two TS signals and the demodulation module 300A that outputs one TS signal. Therefore, in a receiving device using only one of the demodulation module 300 and the demodulation module 300A, the same board can be used, and the demodulation module 300 or the demodulation module 300A can be selected and mounted in the same area. A common board can be used regardless of the number of TS signals to be output.

That is, in constructing a lineup of receiving devices having different numbers of corresponding channels (for example, a receiving device capable of receiving one channel and a receiving device capable of receiving two channels), a common board can be used, and the manufacturing cost can be increased. Can be reduced.

Further, for example, when the shapes of the demodulation module for one TS and the demodulation module for two TSs are different, both mounting areas are secured and only one of them is mounted to make a common board. However, in this case, since the module shapes are different, it is necessary to secure both areas, and the board size becomes large. On the other hand, by using this demodulation module 300A, the area of the demodulation module 300A can be made one, and the substrate size can be reduced.

When the demodulation module 300A is composed of an LSI, the pitch of the terminal pins on the package is, for example, 0.4 mm or less, and the package size is, for example, 49 mm ² or less. When the Divad is used as an Exposed Pad, the number of pin pins of the terminal is 65 pins or less.

[3-4. Modification 2 of the third embodiment]
The demodulation module 300B according to the second modification of the third embodiment will be described with reference to FIGS. 21 and 22.

FIG. 21 is a block configuration diagram showing the demodulation module 300B according to the second modification of the third embodiment. FIG. 22 is a diagram showing terminal assignment of the output terminal of the demodulation module 300B.

The demodulation module 300B of the second modification has a demodulation module having a plurality of two output systems. For example, the demodulation module 300B may have two demodulation modules 300A.

One of the two demodulation modules 300A, the demodulation module 300A, has an output terminal 31z and an output terminal 32z. In the 1-bit serial format, the TS signal is output from the output terminal 31z, and in the 8-bit parallel format, the output terminal. The TS signal is output via the 31z and the output terminal 32z. The output terminal 31z of one of the demodulation modules 300A is connected to the output terminal 36z of the demodulation module 300B, but the output terminal 32z is not connected to the output terminal of the demodulation module 300B.

The other demodulation module 300A also has an output terminal 31z and an output terminal 32z. In the 1-bit serial format, the TS signal is output from the output terminal 31z, and in the 8-bit parallel format, the TS signal is output via the output terminal 31z and the output terminal 32z. Outputs a TS signal. The output terminal 31z of the other demodulation module 300A is connected to the output terminal 37z of the demodulation module 300B, but the output terminal 32z is not connected to the output terminal of the demodulation module 300B. As a result, the demodulation module 300B having a plurality of demodulation modules 300A built-in can reduce the number of output terminals by not outputting in parallel format, and can be miniaturized.

The two demodulation modules 300A may each be configured as an LSI, and the demodulation module 300B may have a SIP (System in Package) configuration incorporating them. The pitch of the terminal pins on the SIP package is, for example, 0.4 mm or less, and the cross section of the terminal is, for example, 49 mm ² or less. The number of pins of the terminals of the terminal group may be 64 pins or less. When the diver is used as an expose pad, the number of pins of the terminal may be 65 pins or less.

In the above, the number of terminal pins is 64 pins or less, but this is because of the following. Currently, as a demodulation module for TV, the size for 1TS (for single) is 7 × 7 = 49 mm ² , and in order to reduce the mounting area, it is desired that the demodulation module for 2TS has the same or less number of terminal pins. In this size, the upper limit is about 64 pins in the pin arrangement of 0.4 mm pitch, and the number of terminal pins is preferably 64 pins or less. Therefore, it is desirable that the number of terminal pins is 64 pins or less, and when the Divad is used as an expose pad, the number of terminal pins is 65 pins or less.

[3-5. Effect, etc.]
The demodulation module 300 of the present embodiment is a demodulation module that demodulates a broadcast signal of digital broadcasting and outputs one or two TS signals, and is a first output terminal group having a plurality of terminals T1 to T6. The second output terminal group G32 having a plurality of terminals T7 to T12 different from G31 and terminals T1 to T6 and the first IF signal i31 generated based on the broadcast signal are demodulated and the first based on the demodulation processing. The first demodulation unit 310 that outputs the TS signal t31 and the second IF signal i32 generated based on the broadcast signal are demodulated, and the second demodulation that outputs the second TS signal t32 based on the demodulation processing is performed. The unit 320, the first signal shaping unit 330 that shapes the first TS signal t31 and outputs the first shaped TS signal f31 having a predetermined output format, and the second TS signal t32 are shaped and predetermined. A second signal shaping unit 340 that outputs a second shaped TS signal f32 having an output format, a first shaped TS signal f31 and a second shaped TS signal f32 are input, and the first shaped TS signal f31 and the first shaped TS signal f31. An output selection unit 350 for distributing and outputting the shaped TS signal f32 of 2 to the first output terminal group G31 and the second output terminal group G32 is provided.

As described above, the demodulation module 300 is provided with an output selection unit 350 that distributes and outputs two TS signals to the first output terminal group G31 and the second output terminal group G32, so that it can correspond to various reception modes. It is possible to provide a highly versatile demodulation module 300 that can be used.

Further, the demodulation module 300 has a form according to the first output form M31 or the second output form M32. In the first output mode M31, the first signal shaping unit 330 outputs the first shaped TS signal f31 in the 1-bit format, and the output selection unit 350 outputs the first shaped TS signal f31 to the first output terminal group G31. The second signal shaping unit 340 outputs the second shaped TS signal f32 in the 1-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the second output terminal group G32. It is a form to output from. In the second output mode M32, the first signal shaping unit 330 outputs the first shaped TS signal f31 in 8-bit format, and the output selection unit 350 outputs the first shaped TS signal f31 to the first output terminal group. It is a form in which G31 and the second output terminal group G32 are divided and output.

As described above, by having the demodulation module 300 in the form of the first output form M31 or the second output form M32, it is possible to provide a highly versatile demodulation module 300 that can correspond to various reception forms. ..

Further, the demodulation module 300 further has a third output form M33. In the third output mode M33, the second signal shaping unit 340 outputs the second shaped TS signal f32 in 8-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the first output terminal group G31. It is a form in which the output is divided into the second output terminal group G32.

As described above, since the demodulation module 300 further has the third output form M33, it is possible to provide a highly versatile demodulation module 300 that can correspond to various reception forms.

Further, the first signal shaping unit 330 shapes the first TS signal t31 to generate a first shaped TS signal f31 having either a 1-bit format, a 2-bit format, or an 8-bit format. The second signal shaping unit 340 shapes the second TS signal t32 to generate a second shaped TS signal f32 having either a 1-bit format, a 2-bit format, or an 8-bit format. The demodulation module 300 further has a fourth output mode M34. In the fourth output mode M34, the second signal shaping unit 340 outputs the second shaped TS signal f32 having a 2-bit format, and the output selection unit 350 outputs the second shaped TS signal f32 to the first output terminal group. It is a form to output only to G31.

As described above, since the demodulation module 300 further has the fourth output form M34, it is possible to provide a highly versatile demodulation module 300 that can correspond to various reception forms.

(Embodiment 4)
[4-1. Background to this disclosure]
The process leading to this disclosure will be described with reference to FIG. 23, which is Comparative Example 4.

In a receiver that receives satellite and terrestrial broadcasts, which are digital broadcasts, the RF section (tuner) converts the IF frequency for satellite broadcasts into baseband signals (I-axis, Q-axis) and terrestrial broadcasts (terrestrial). For wave broadcasting and cable broadcasting), the RF frequency is converted into an IF signal, and the converted signal is output to the demodulator module.

FIG. 23 is a block configuration diagram showing the demodulation module 4000 of Comparative Example 4.

The demodulation module 4000 of Comparative Example 4 selects and demodulates satellite broadcasting and terrestrial broadcasting, and outputs a TS signal. The demodulation module 4000 of Comparative Example 4 includes an AD conversion unit 4410, an AD conversion unit 4420, an AD conversion unit 4430, a demodulation error correction unit 4440, input terminals 41, 42, 43, and an output terminal 41z.

The AD conversion unit 4410 and the AD conversion unit 4420 convert the baseband signal for satellite broadcasting from an analog signal to a digital signal, demodulate the satellite broadcast by the demodulation error correction unit 4440, and output the TS signal of the satellite broadcast. Output from terminal 41z.

The AD conversion unit 4430 converts the IF signal of the terrestrial broadcast into a digital signal, demodulates the terrestrial broadcast by the demodulation error correction unit 4440, and outputs the TS signal of the terrestrial broadcast from the output terminal 41z.

For example, each AD conversion unit differs in reception bandwidth, operating clock, and required bit resolution between satellite broadcasting and terrestrial broadcasting, and is divided as an AD conversion unit in consideration of each broadcasting method. Therefore, in Comparative Example 4, Three AD conversion units are required. Therefore, in the case of a demodulation module that receives two channels, six AD conversion units are required, which causes a problem that the circuit scale becomes large.

On the other hand, the demodulation module of the present disclosure has a circuit corresponding to various reception forms and can be used with high flexibility.

[4-2. Demodulation module configuration]
The demodulation module 400 according to the fourth embodiment will be described with reference to FIG. 24. The demodulation module 400 according to the fourth embodiment is a demodulation module that demodulates a satellite broadcast signal or a terrestrial broadcast signal, which is a broadcast signal of digital broadcasting, to generate a TS signal.

FIG. 24 is a block configuration diagram showing the demodulation module 400 according to the fourth embodiment.

As shown in FIG. 24, the demodulation module 400 includes a first AD conversion unit 410, a second AD conversion unit 420, a first selection unit 430, and a demodulation error correction unit 450. Further, the demodulation module 400 includes input terminals 41, 42, 43 and an output terminal 41z.

The input terminal 41 is connected to the first AD conversion unit 410, and the input terminals 42 and 43 are connected to the first selection unit 430. The output side of the first selection unit 430 is connected to the second AD conversion unit 420. The output side of the first AD conversion unit 410 and the output side of the second AD conversion unit 420 are connected to the demodulation error correction unit 450. The output side of the demodulation error correction unit 450 is connected to the output terminal 41z.

The baseband I signal b41 output from the first RF unit is input to the input terminal 41, and the baseband Q signal b42 output from the first RF unit is input to the input terminal 42. The baseband I signal b41 and the baseband Q signal b42 are signals generated by RF processing or the like of the satellite broadcast signal. The IF signal i41 output from the second RF unit is input to the input terminal 43.

One of the baseband I signal b41 and the baseband Q signal generated based on the broadcast signal is input to the first AD conversion unit 410. The first AD conversion unit 410 performs AD conversion processing on one of the input signals, and generates a first conversion signal c41 based on the AD conversion processing. In the present embodiment, the first AD conversion unit 410 receives the baseband I signal b41 and performs AD conversion processing on the baseband I signal b41 to generate the first conversion signal c41. The first AD conversion unit 410 outputs the first conversion signal c41 to the demodulation error correction unit 450.

The baseband I signal b41 and the other signal of the baseband Q signal are input to the first selection unit 430 via the input terminal 42, and the IF signal i41 is input via the input terminal 43. The IF signal i41 is a signal generated by RF processing or the like of a terrestrial broadcast signal. The setting information S4a indicating which of the satellite broadcast signal and the terrestrial broadcast signal is to be processed is input to the first selection unit 430.

The first selection unit 430 selects either the other signal or the IF signal i41 based on the broadcasting system set by the setting information S4a, and uses the selected signal as the first selection signal s41 as the second AD conversion unit 420. Output to. In this way, the first selection unit 430 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 400.

For example, the first selection unit 430 selects one of the above signals (b41 or b42) when the setting information S4a is set to perform signal processing of the satellite broadcast signal. Further, the first selection unit 430 selects the IF signal i41 when the setting information S4a is set to perform signal processing of the terrestrial broadcast signal. Specifically, when the first selection unit 430 performs signal processing of the satellite broadcast signal, the first selection unit 430 selects the baseband Q signal b42 input via the input terminal 42, and uses this as the first selection signal s41. Output to 2AD conversion unit 420. Further, when the first selection unit 430 performs signal processing of the terrestrial broadcast signal, the IF signal i41 input via the input terminal 43 is selected, and this is used as the first selection signal s41 to the second AD conversion unit 420. Output.

The first selection signal s41 is input to the second AD conversion unit 420. The second AD conversion unit 420 performs AD conversion processing on the first selection signal s41, and generates a second conversion signal c42 based on the AD conversion processing. The second AD conversion unit 420 outputs the second conversion signal c42 to the demodulation error correction unit 450.

Similar to the first selection unit 430, the setting information S4a is input to the demodulation error correction unit 450. The demodulation error correction unit 450 performs demodulation processing on the first conversion signal c41 and / or the second conversion signal c42 based on the broadcasting method set by the setting information S4a, and the TS signal t41 based on the demodulation processing. To generate. For example, the demodulation error correction unit 450 generates a TS signal t41 based on the first conversion signal c41 and the second conversion signal c42 when performing signal processing of the satellite broadcast signal, and performs signal processing of the terrestrial broadcast signal. When doing so, the TS signal t41 is generated based only on the second conversion signal c22. The demodulation error correction unit 450 outputs the TS signal t41 to the outside via the output terminal 41z.

In this way, the demodulation module 400 uses the first selection unit 430 to select one of the satellite broadcast baseband Q signal b42 and the terrestrial broadcast IF signal i41 and output it to the second AD conversion unit 420. Can be done. Further, in the demodulation module 400, the second AD conversion unit 420 is shared so as to perform AD conversion processing for both the baseband Q signal b42 and the IF signal i41.

In the second AD conversion unit 420, the reception bandwidth, the operating clock (sampling rate), and the required bit resolution may be the same for satellite broadcasting and terrestrial broadcasting. By making these specifications and performance the same, the number of circuits of the second AD conversion unit 420 can be reduced, and the circuit scale of the demodulation module 400 can be reduced.

In the above, an example is shown in which the baseband I signal b41 is input to the input terminal 41 and the baseband Q signal b42 is input to the input terminal 42, but conversely, the baseband Q signal b42 is input to the input terminal 41. The base band I signal b41 may be input to the input terminal 42. In that case, the baseband Q signal is used as one signal and the baseband I signal b41 is used as the other signal, and the subsequent processing is performed.

[4-3. Modification 1 of Embodiment 4]
The demodulation module 400A according to the first modification of the fourth embodiment will be described with reference to FIG. 25. In this modification 1, an example in which the setting information S4a is also input to the second AD conversion unit 420 will be described.

FIG. 25 is a block configuration diagram showing the demodulation module 400A according to the first modification of the fourth embodiment.

The demodulation module 400A of the first modification includes a first AD conversion unit 410, a second AD conversion unit 420, a first selection unit 430, and a demodulation error correction unit 450. Further, the demodulation module 400A includes input terminals 41, 42, 43 and an output terminal 41z.

The setting information S4a indicating which of the satellite broadcast signal and the terrestrial broadcast signal is to be processed is input to the second AD conversion unit 420. This setting in the second AD conversion unit 420 is the same as the setting in the first selection unit 430 and the demodulation error correction unit 450.

The second AD conversion unit 420 performs AD conversion processing on the first selection signal s41 based on the broadcasting system set by the setting information S4a, and generates a second conversion signal c42 based on the AD conversion processing. For example, the second AD conversion unit 420 corresponds to the set broadcasting system and performs AD conversion processing by switching the setting of the reception bandwidth, the setting of the AD conversion rate, the setting of the drive capacity (gain), and the like. As a result, the second AD conversion unit 420 can execute the AD conversion process having good reception characteristics by the optimum operation for the set broadcasting system.

The demodulation module 400A also uses the first selection unit 430 to select, for example, the baseband Q signal b42 for satellite broadcasting and the IF signal i41 for terrestrial broadcasting, and output them to the second AD conversion unit 420. Further, in the demodulation module 400A, the second AD conversion unit 420 is shared so as to perform AD conversion processing for both the baseband Q signal b42 and the IF signal i41.

In the second AD conversion unit 420, the reception bandwidth, the operating clock (sampling rate), and the required bit resolution may be the same for satellite broadcasting and terrestrial broadcasting. By making these specifications and performance the same, the number of circuits of the second AD conversion unit 420 can be reduced, and the circuit scale of the demodulation module 400A can be reduced.

[4-4. Modification 2 of Embodiment 4]
The demodulation module 400B according to the second modification of the fourth embodiment will be described with reference to FIG. 26. In the second modification, an example in which the setting information S4a is also input to the first AD conversion unit 410 will be described.

FIG. 26 is a block configuration diagram showing the demodulation module 400B according to the second modification of the fourth embodiment.

The demodulation module 400B of the modification 2 includes a first AD conversion unit 410, a second AD conversion unit 420 (functions and characteristics equivalent to the first AD conversion unit 410), a first selection unit 430, and a demodulation error correction unit 450. It is equipped with. Further, the demodulation module 400B includes input terminals 41, 42, 43 and an output terminal 41z.

The setting information S4a indicating which of the satellite broadcast signal and the terrestrial broadcast signal is to be processed is input to the first AD conversion unit 410. The first AD conversion unit 410 performs AD conversion processing on the baseband I signal b41 based on the broadcasting system set by the setting information S4a, and generates a first conversion signal c41 based on the AD conversion processing.

With the above configuration, it is only necessary to prepare one type of AD conversion unit, and when processing the baseband I signal and Q signal of satellite broadcasting, the same AD conversion unit is provided on the I side and the Q side. It will be used, and the bias of the characteristics can be eliminated.

Further, in this modification 2, the setting of the broadcasting method of the first AD conversion unit 410 is switched by the setting information S4a input from the outside, but the present invention is not limited to this, and for example, the satellite broadcasting signal can be set by the internal setting. It may be set to perform signal processing.

[4-5. Modification 3 of the fourth embodiment]
The demodulation module 400C according to the third modification of the fourth embodiment will be described with reference to FIG. 27. In the third modification, an example in which the second selection unit 440 is provided between the input terminal 41 and the first AD conversion unit 410 will be described.

FIG. 27 is a block configuration diagram showing the demodulation module 400C according to the third modification of the fourth embodiment.

The demodulation module 400C of the modification 3 includes a first AD conversion unit 410, a second AD conversion unit 420, a first selection unit 430, a second selection unit 440, and a demodulation error correction unit 450. Further, the demodulation module 400C includes input terminals 41, 42, 43 and an output terminal 41z.

The second selection unit 440 is provided on the wiring path connecting the input terminal 41 and the first AD conversion unit 410. A plurality of signals are input to the second selection unit 440, and for example, a baseband I signal b41 and a dummy signal (for example, a signal of 0) are input. The second selection unit 440 of this modification is set to perform signal processing of the satellite broadcast signal by the internal setting. Therefore, the second selection unit 440 does not select a dummy signal, selects one of the above signals (for example, the baseband I signal b41), and outputs this signal as the second selection signal s42 to the first AD conversion unit 410. When at least the first selection unit 430 selects the other signal, the second selection unit 440 may select one of the plurality of signals and output it to the first AD conversion unit 410. good.

The first AD conversion unit 410 performs AD conversion processing on the second selection signal s42 based on the broadcasting system set by the setting information S4a, and generates a first conversion signal c41 based on the AD conversion processing.

In the demodulation module 400C, the first AD conversion unit 410 and the second AD conversion unit 420 can have the same characteristics for the I-axis signal and the Q-axis signal. Further, in the demodulation module 400C, each of the I-axis signal and the Q-axis signal passes through each of the first selection unit 430 and the second selection unit 440, so that the impedances of the I-axis signal and the Q-axis signal are aligned. Can be done. As a result, the balance between the I-axis and the Q-axis can be maintained, and deterioration of the reception characteristics can be suppressed.

In this modification 3, the dummy signal input to the second selection unit 440 is set to 0, but the dummy signal does not have to be 0 and may be any signal.

Further, in this modification 3, as the setting of the broadcasting method of the second selection unit 440, the signal processing of the satellite broadcasting signal is set by the internal setting, but the setting information S4a input from the outside is not limited to this. , May be set to perform signal processing of satellite broadcast signals.

[4-6. Modification 4 of Embodiment 4]
The demodulation module 400D according to the fourth modification of the fourth embodiment will be described with reference to FIG. 28.

FIG. 28 is a block configuration diagram showing a demodulation module 400D according to a modification 4 of the fourth embodiment.

In the demodulation module 400D of the modification 4, the second selection unit 440 and the first AD conversion unit 410 are set to perform signal processing of the satellite broadcast signal by internal setting. Further, the setting information S4a is input to the second AD conversion unit 420.

Even in the demodulation module 400D, the first AD conversion unit 410 and the second AD conversion unit 420 can have the same characteristics for the I-axis signal and the Q-axis signal. Further, also in the demodulation module 400D, each of the I-axis signal and the Q-axis signal passes through each of the first selection unit 430 and the second selection unit 440, so that the impedances of the I-axis signal and the Q-axis signal are aligned. Can be done. As a result, the balance between the I-axis and the Q-axis can be maintained, and deterioration of the reception characteristics can be suppressed.

[4-7. Modification 5 of Embodiment 4]
The demodulation module 400E according to the fifth modification of the fourth embodiment will be described with reference to FIG. 29. In the above, the demodulation module that receives one channel and performs demodulation processing has been described, but in the modified example 5, the demodulation module 400E that receives two channels and performs demodulation processing will be described.

FIG. 29 is a block configuration diagram showing the demodulation module 400E according to the fifth modification of the fourth embodiment.

The demodulation module 400E of FIG. 29 includes two demodulation modules 400D shown in FIG. 28. Further, the demodulation module 400E includes input terminals 41, 42, 43, 44, 45, 46 and output terminals 41z, 42z.

The input terminals 41 to 43 are connected to one of the two demodulation modules 400D, the demodulation module 400D. The output side of one demodulation module 400D is connected to the output terminal 41z of the demodulation module 400E. The input terminals 44 to 46 are connected to the other demodulation module 400D. The output side of the other demodulation module 400D is connected to the output terminal 42z of the demodulation module 400E.

The baseband I signal b41 output from the first RF unit is input to the input terminal 41, and the baseband Q signal b42 output from the first RF unit is input to the input terminal 42. The IF signal i41 output from the second RF unit is input to the input terminal 43.

The baseband I signal b43 output from the third RF unit is input to the input terminal 44, and the baseband Q signal b44 output from the third RF unit is input to the input terminal 45. The IF signal i42 output from the fourth RF unit is input to the input terminal 46.

A baseband I signal b41, a baseband Q signal b42, and an IF signal i41 are input to the demodulation module 400D. The setting information S4a is input to one of the demodulation modules 400D. A TS signal t41 is output from one of the demodulation modules 400D. This TS signal t41 is output from the output terminal 41z of the demodulation module 400E.

A baseband I signal b43, a baseband Q signal b44, and an IF signal i42 are input to the other demodulation module 400D. The setting information S4b is input to the other demodulation module 400D. The setting information S4b may be the same as or different from the setting information S4a. The TS signal t42 is output from the other demodulation module 400D.

This TS signal t42 is output from the output terminal 42z of the demodulation module 400E.

The demodulation module 400E may be composed of one LSI. Further, the demodulation module 400E may have a SIP configuration in which two demodulation modules 400D are used as chips. Further, the input terminals 41 to 46, the output terminal 41z, and the output terminal 42z are a group of terminals, and may be composed of one or more terminal pins.

[4-8. Effect, etc.]
The demodulation module 400 of the fourth embodiment is a demodulator module that demolishes a satellite broadcast signal or a terrestrial broadcast signal, which is a broadcast signal of digital broadcasting, to generate a TS signal, and is a base generated based on the satellite broadcast signal. The first AD conversion unit 410 that performs AD conversion processing on one of the band I signal b41 and the base band Q signal b42 and outputs the first conversion signal c41 based on the AD conversion processing, and the other signal different from the other signal. The first selection unit 430 and the first selection unit 430, in which the IF signal i41 generated based on the signal and the terrestrial broadcast signal is input, the other signal and the IF signal i41 are selected and the first selection signal s41 is output. The selection signal s41 of the above is subjected to AD conversion processing, and the second AD conversion unit 420 that outputs the second conversion signal c42 based on the AD conversion processing, and the first conversion signal c41 and / or the second conversion signal c42 are demolished. It is provided with a demodulation error correction unit 450 that performs processing and generates a TS signal t41 based on the demographic processing.

According to this, one of the other signal (for example, the baseband Q signal b42) and the terrestrial broadcasting IF signal i41 can be selected by using the first selection unit 430, and the AD conversion process can be performed. Thereby, it is possible to provide a highly versatile demodulation module 400 that can correspond to various reception forms.

Further, the first selection unit 430 selects one of the above signals when performing signal processing of the satellite broadcast signal, selects the IF signal i41 when performing signal processing of the terrestrial broadcast signal, and selects a demodulation error correction unit. The 450 generates a TS signal t41 based on the first conversion signal c41 and the second conversion signal c42 when performing signal processing of the satellite broadcast signal, and when performing signal processing of the terrestrial broadcast signal, the second The TS signal t41 may be generated based only on the conversion signal c42 of.

According to this, it is possible to generate a TS signal according to each setting of satellite broadcasting and terrestrial broadcasting. Thereby, it is possible to provide a highly versatile demodulation module 400 that can correspond to various reception forms.

Further, setting information S4a indicating which of the satellite broadcast signal and the terrestrial broadcast signal is to be processed is input to each of the first selection unit 430 and the demodulation error correction unit 450, and the first selection unit 430 is set. One of the above signals or the IF signal i41 may be selected based on the information S4a, and the demodulation error correction unit 450 may generate the TS signal t41 based on the setting information S4a.

According to this, the first selection unit 430 can select the signal according to the reception form, and the demodulation error correction unit 450 can generate the TS signal according to the reception form. Thereby, it is possible to provide a highly versatile demodulation module 400 that can correspond to various reception forms.

Further, the setting information S4a may be input to the second AD conversion unit 420, and the second AD conversion unit 420 may perform the AD conversion process based on the setting information S4a.

According to this, the second AD conversion unit 420 can perform the AD conversion process according to the reception mode. This makes it possible to perform AD conversion processing corresponding to various reception modes.

Further, the setting information S4a may be input to the first AD conversion unit 410, and the first AD conversion unit 410 may perform the AD conversion process based on the setting information S4a.

According to this, the first AD conversion unit 410 can perform the AD conversion process according to the reception mode. Thereby, it is possible to provide a highly versatile demodulation module 400B that can correspond to various reception forms. Further, with the above configuration, it is only necessary to prepare one type of AD conversion unit, and when processing the baseband I signal and Q signal of satellite broadcasting by this, the same AD conversion is performed on the I side and the Q side. By using a part, it is possible to eliminate the bias of the characteristics.

Further, the demodulation module 400C further includes a second selection unit 440 to which a plurality of signals including the above one signal are input, and in the second selection unit 440, at least the first selection unit 430 selects the other signal. In this case, one of the above signals may be selected and output to the first AD conversion unit 410.

According to this, the signal characteristics in the first AD conversion unit 410 and the second AD conversion unit 420 can be made uniform. This makes it possible to suppress deterioration of the reception characteristics of the demodulation module 400C.

(Embodiment 5)
[5-1. Background to this disclosure]
The process leading to this disclosure will be described with reference to FIG. 30, which is Comparative Example 5.

For next-generation terrestrial broadcasting, transmission using MIMO (MultiInput-MultiOutput) is being studied as shown in Non-Patent Document 2 in order to expand the transmission capacity. The receiving device 5001 of Comparative Example 5 performs transmission using MIMO by utilizing horizontal and vertical polarization.

FIG. 30 is a block configuration diagram showing a receiving device 5001 including the demodulation module 5000 of Comparative Example 5.

As shown in FIG. 30, the receiving device 5001 of the comparative example includes an RF unit for horizontally polarized waves, an RF unit for vertically polarized waves, a demodulation module, a decoder unit, and a display unit. The demodulation module includes a first demodulation processing unit, a second demodulation processing unit, a MIMO equalization unit, a first error correction unit, a second error correction unit, and a synthesis unit. The first demodulation processing unit includes an AD conversion unit, a time processing unit, an FFT (Fast Fourier Transform) unit, a frequency processing unit, and a transmission path estimation unit. The second demodulation processing unit has the same configuration as the first demodulation processing unit.

The signals of the antennas for horizontally polarized waves and vertically polarized waves are input, and the signal converted into an IF signal or a baseband signal in the RF section is converted from an analog signal to a digital signal in the AD conversion section and sent to the time processing section. Time synchronization is executed, and FFT processing is performed in the FFT unit. Then, the frequency processing unit executes frequency synchronization and frame synchronization, and the transmission line estimation unit executes transmission line estimation. The same processing is performed for the second demodulation processing unit.

The MIMO equalization unit performs MIMO equalization (signal separation) based on the FFT-processed signal and the transmission line estimated value in the first demodulation processing unit and the second demodulation processing unit, and transmits the data in horizontal polarization. The data signal is output to the error correction unit, the data signal transmitted by vertical polarization is output to the error correction unit, error correction is performed for each, the composition unit synthesizes the stream, and the data signal is output to the decoder unit. In the decoder section, H. Decoding processing such as 265 / HEVC (High Efficiency Video Coding) and VVC (Versatile Video Coding) is performed, and an image is displayed on the display unit.

As described above, the receiving device 5001 that receives MIMO has a plurality of RF units, a demodulation processing unit, and an error correction unit. On the other hand, as the broadcasting parameter, not only MIMO but also SISO (Single Input-Single Output) is performed, and at the time of SISO, transmission is performed using one plane of polarization (for example, only horizontal polarization). In that case, the second RF unit (here, for vertical polarization), the demodulation processing unit, and the error correction unit are not used, and there is a problem that resources suitable for the reception mode are not utilized.

On the other hand, the demodulation module of the present disclosure has the following configuration, so that it can be used in various reception modes and can be used with high flexibility.

[5-2. Demodulation module configuration]
The configuration of the demodulation module 500 according to the fifth embodiment will be described with reference to FIG. 31.

The demodulation module 500 according to the fifth embodiment is a demodulation module that demodulates a broadcast signal of digital broadcasting and generates one or two TS signals.

The demodulation module 500 has a MIMO reception mode M51 for receiving a broadcast signal by MIMO and a SOIS reception mode M52 for receiving a broadcast signal by MIMO. The demodulation module 500 can switch between the MIMO reception mode M51 and the SOISO reception mode M52.

FIG. 31 is a block configuration diagram showing a receiver 501 including a demodulation module 500. Note that FIG. 31 also shows the horizontally polarized wave antenna At1 and the vertically polarized wave antenna At2.

As shown in FIG. 31, the demodulation module 500 includes a first demodulation processing unit 510, a second demodulation processing unit 520, a MIMO equalization unit 530, a first selection unit 541, a second selection unit 542, and a second. It includes a three-selection unit 543, a first error correction unit 551, a second error correction unit 552, and a synthesis unit 560.

The first demodulation processing unit 510 includes an AD conversion unit 511, a time processing unit 512, an FFT unit 513, a frequency processing unit 514, a transmission path estimation unit 515, and a SISO equalization unit 516. The first demodulation processing unit 510 performs at least one processing of AD conversion processing, FFT processing, transmission line estimation processing, and SISO equalization processing on the first analog signal a51 RF-processed by the RF unit 503. , The first transmission line estimation signal p51 and the first SISO equalization signal s51 are output. In addition to estimating the transmission line for the MIMO channel, the transmission line estimation unit 515 also estimates the transmission line for SOIS in the SISO reception mode M52.

The second demodulation processing unit 520 includes an AD conversion unit 521, a time processing unit 522, an FFT unit 523, a frequency processing unit 524, a transmission path estimation unit 525, and a SISO equalization unit 526. The second demodulation processing unit 520 performs at least one processing of AD conversion processing, FFT processing, transmission line estimation processing, and SISO equalization processing on the second analog signal a52 RF-processed by the RF unit 504. , The second transmission line estimation signal p52 and the second SISO equalization signal s52 are output. In addition to estimating the transmission line for the MIMO channel, the transmission line estimation unit 525 also estimates the transmission line for SOIS in the SISO reception mode M52.

The MIMO equalization unit 530 performs MIMO equalization processing on each of the first transmission line estimation signal p51 and the second transmission line estimation signal p52, and performs MIMO equalization processing, and the first MIMO processing signal m51 and the second MIMO processing signal. Output m52.

The first selection unit 541 selects the output of the MIMO equalization unit 530 when the reception method processed by the first demodulation processing unit 510 is the MIMO reception mode M51, and the first selection unit 541 selects the output of the MIMO equalization unit 530. The output of unit 516 is selected and output to the first error correction unit 551.

The second selection unit 542 selects the output of the MIMO equalization unit 530 when the reception method processed by the second demodulation processing unit 520 is the MIMO reception mode M51, and the second selection unit 542 selects the output of the MIMO equalization unit 530. The output of unit 526 is selected and output to the second error correction unit 552.

As described above, each of the first selection unit 541 and the second selection unit 542 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 500.

The first error correction unit 551 erroneously corrects the first SISO equalization signal s51 or the first MIMO processing signal m51, and outputs the first error correction signal e51. The first error correction signal e51 is a signal belonging to the TS signal.

The second error correction unit 552 erroneously corrects the second SISO equalization signal s52 or the second MIMO processing signal m52, and outputs the second error correction signal e52. The second error correction signal e52 is a signal belonging to the TS signal.

The synthesis unit 560 performs MIMO synthesis processing of the first error correction signal and the second error correction signal, and outputs the synthesis signal c50.

The output of the first error correction unit 551 and the output of the synthesis unit 560 are input to the third selection unit 543. The third selection unit 543 can select a predetermined signal from the plurality of input signals. Which signal to select from the plurality of signals is appropriately set according to the specifications or applications of the demodulation module 500. In the case of MIMO reception mode M51, the third selection unit 543 selects the output of the synthesis unit 560 and outputs it to the decoder unit 505. In the case of the SISO reception mode M52, the third selection unit 543 selects the signal output from the first error correction unit 551 and outputs it to the decoder unit 505.

The output of the third selection unit 543 or the output of the second error correction unit 552 is input to the decoder unit 505. As a result, in the case of the MIMO reception mode M51, the decoder unit 505 decodes the stream which is the output of the third selection unit 543 after being synthesized by the synthesis unit 560. Further, in the case of the SISO reception mode M52, the decoder unit 505 decodes the stream which is the output of the third selection unit 543 after being output from the first error correction unit 551, and further, the second error correction unit 552 Decode the output stream. That is, in the case of the SISO reception mode M52, both systems operate.

In the present embodiment, in the MIMO reception mode M51, the first error correction unit 551 and the second error correction unit 552 error-correct the first MIMO processing signal m51 and the second MIMO processing signal m52, respectively, and synthesize them. The signal c50 is output as a MIMO-processed TS signal mm1.

Further, in the SISO reception mode M52, the first error correction unit 551 and the second error correction unit 552 error-correct the first SISO equalization signal s51 or the second SISO equalization signal s52, respectively, and perform the first error correction unit. The error correction signal e51 is output as the first SISO-processed TS signal ss1, and the second error-correction signal e52 is output as the second SISO-processed TS signal ss2.

The receiving device 501 including the demodulation module 500 can effectively utilize resources in the MIMO reception mode M51 and receive two channels in the SISO reception mode M52 to obtain two streams.

It should be noted that the decoder unit 505 of the receiving device 501 does not have to always receive two channels in the SISO reception mode M52, and may only decode one of them according to the user's setting.

[5-3. Modification of Embodiment 5]
The receiving device 501 according to the modified example of the fifth embodiment will be described with reference to FIG. 32.

FIG. 32 is a block configuration diagram showing a receiver 501 including a demodulation module 500A according to a modification of the fifth embodiment. Note that FIG. 32 also shows the horizontally polarized wave antenna At1 and the vertically polarized wave antenna At2.

The receiving device 501 including the demodulation module 500A includes a fourth selection unit 544, inputs an antenna signal for horizontal polarization and an antenna signal for vertical polarization, selects one and outputs the signal to the RF unit 504. .. The first analog signal a51 shown in FIG. 32 is a signal based on the signal received by the horizontally polarized wave antenna At1. The second analog signal a52 is a signal based on the signal received by the vertically polarized antenna At2 in the MIMO reception mode M51, and is based on the signal received by the horizontally polarized antenna At1 in the SOISO reception mode M52. It is a signal, and is generally an analog signal subjected to RF processing different from that of the first analog signal a51.

In the receiving device 501 shown in FIG. 31, when two channels are received in the SISO reception mode M52, they are transmitted on the same plane of polarization, so that the receiving device 501 is for vertical polarization as opposed to the case of receiving with the antenna for horizontal polarization At1. When receiving with the antenna At2, there is a problem that a gain cannot be obtained and the reception quality in the second demodulation processing unit 520 deteriorates.

On the other hand, in this modification, in the fourth selection unit 544, the antenna signal for vertical polarization is selected in the MIMO reception mode M51, and the antenna signal for horizontal polarization is selected in the SISO reception mode M52. As a result, even when two channels are received in the SISO reception mode M52, deterioration of reception quality due to the mismatch of the planes of polarization can be suppressed.

[5-4. Effect, etc.]
The demodulation module 500 of the fifth embodiment is a demodulation module that demodulates a broadcast signal of digital broadcasting and generates a TS signal of one system or two systems. The demodulation module 500 has a MIMO reception mode M51 for receiving a broadcast signal by MIMO and a SOISO reception mode M52 for receiving a broadcast signal by MIMO, and the MIMO reception mode M51 and the SOISO reception mode M52 can be switched.

According to this, it is possible to provide a highly versatile demodulation module 500 corresponding to the reception modes of MIMO and SISO.

Further, the demodulation module 500 includes a first demodulation processing unit 510, a second demodulation processing unit 520, a MIMO equalization unit 530, a first error correction unit 551, a second error correction unit 552, and a synthesis unit 560. , Equipped with. The first demodulation processing unit 510 performs at least one processing of AD conversion processing, FFT processing, transmission line estimation processing, and SISO equalization processing on the first analog signal a51 RF-processed externally, and the first The transmission line estimation signal p51 of 1 and the first SISO equalization signal s51 are output. The second demodulation processing unit 520 performs at least one processing of AD conversion processing, FFT processing, transmission line estimation processing, and SISO equalization processing on the second analog signal a52 RF-processed externally, and the second demodulation processing unit 520 performs the second processing. The transmission line estimation signal p52 of 2 and the second SISO equalization signal s52 are output. The MIMO equalization unit 530 performs MIMO equalization processing on each of the first transmission line estimation signal p51 and the second transmission line estimation signal p52, and performs MIMO equalization processing, and the first MIMO processing signal m51 and the second MIMO processing signal. Output m52. The first error correction unit 551 erroneously corrects the first SISO equalization signal s51 or the first MIMO processing signal m51, and outputs the first error correction signal e51. The second error correction unit 552 erroneously corrects the second SISO equalization signal s52 or the second MIMO processing signal m52, and outputs the second error correction signal e52. The synthesizing unit 560 may synthesize the first error correction signal e51 and the second error correction signal e52 and output the synthesizing signal c50.

According to this, it is possible to synthesize and output a signal which has been error-corrected from the SISO processed signal or the MIMO processed signal. Thereby, it is possible to provide a highly versatile demodulation module 500 that can correspond to various reception forms.

Further, in the MIMO reception mode M51, the first error correction unit 551 and the second error correction unit 552 error-correct the first MIMO processing signal m51 and the second MIMO processing signal m52, respectively, and the synthesis unit 560 determines. The combined signal c50 is output as a MIMO-processed TS signal mm1. In the SISO reception mode M52, the first error correction unit 551 and the second error correction unit 552 error-correct the first SISO-equalized signal s51 or the second SISO-equalized signal s52, respectively, and perform the first error correction. The signal e51 may be output as the first SISO-processed TS signal ss1, and the second error correction signal e52 may be output as the second SISO-processed TS signal ss2.

According to this, it is possible to provide a highly versatile demodulation module 500 corresponding to the reception modes of MIMO and SISO.

Further, the first analog signal a51 is a signal based on the signal received by the horizontally polarized wave antenna At1, and the second analog signal a52 is received by the vertically polarized wave antenna At2 in the MIMO reception mode M51. It is a signal based on the signal received by the horizontally polarized antenna At1 in the SISO reception mode M52, and is an analog signal subjected to RF processing different from that of the first analog signal a51. May be good.

According to this, even when two channels are received in the SISO reception mode M52, deterioration of reception quality due to the mismatch of the planes of polarization can be suppressed.

In the fifth embodiment, the signal handled by the first demodulation processing unit 510 has been described as horizontal polarization, but the present invention is not limited to this, and the first demodulation processing unit 510 has vertical polarization in an area where vertical polarization is mainly used. Become.

Further, the receiving device 501 is configured to have a display unit 506, but the present invention is not limited to this, and a video and audio signal may be output and an external display unit (not shown) may be used.

Further, the transmission line estimation unit 515 and the transmission line estimation unit 525 of the receiving device 501 may receive MIMO (Multiple-Input and Multiple-Autoput), and perform the transmission line estimation for MISO at the time of MISO. Further, the SISO equalization unit 516 and the SISO equalization unit 526 carry out an aramoty compound number for equalizing MISO and output to the first selection unit 541 or the second selection unit 542.

In the receiving device 501, when one system of the first demodulation processing unit 510 or the second demodulation processing unit 520 is receiving SISO, when an attempt is made to select MIMO reception while continuing the one system. May be displayed to indicate that the MIMO channel cannot be selected or to select whether to block the reception of the one system. This is because when the user is receiving SIMO on one system, the user tries to watch another channel in addition to it, and if it is MIMO, as a resource of the receiving device, MIMO is continuously maintained. Since it is not possible to receive MIMO, it is necessary to either not receive new MIMO or stop receiving SISO. This makes it possible to notify that the MIMO cannot be tuned when the user selects the MIMO, or prevent the user from unintentionally blocking the continuous SOIS reception so far. Can be done.

Further, when the MIMO channel is selected and received, if only one of the first demodulation processing unit 510 or the second demodulation processing unit 520 is synchronized, an alarm different from the normal alarm is displayed. May be good. A normal alarm is, for example, "the antenna is not connected" or "there is an abnormality in the antenna", but a different alarm (for example, "there is an abnormality in the MIMO antenna") is used. As a result, unlike a normal antenna abnormality, it is notified that the signal connection on only one side (particularly, the antenna input side of the second demodulation processing unit 520 to be added: the antenna signal for vertical polarization here) is not established. It is possible to easily solve the user's trouble.

Further, when the MIMO channel is selected and received, the inverse of the matrix generated by the transmission path characteristics of the first demodulation processing unit 510 and the second demodulation processing unit 520 in the processing of the matrix calculation in the MIMO equalization unit 530. When the matrix cannot be calculated (the determinant is 0), an alarm different from the normal alarm may be displayed. Normal alarms are, for example, "the antenna is not connected" or "the antenna is abnormal", but different alarms (for example, "the same signal is contained in the MIMO antenna"). do. When the input signals of the first demodulation processing unit 510 and the second demodulation processing unit 520 are the same, the matrix expression of the matrix generated by the transmission path characteristic becomes 0. Therefore, this alarm causes the user to mistakenly perform the second demodulation. When the signal of the antenna signal for the first demodulation processing unit 510 (for horizontal polarization here) is distributed and input to the antenna signal for the processing unit 520 (here, for vertical polarization), that fact is notified. It is possible to easily solve the user's trouble.

In the fifth embodiment, the video / audio output format is described as TS, but the present invention is not limited to this, and a TLV (Type Length Value) packet may be used. TLV is a format used in BS4K8K broadcasting, which is an advanced BS.

(Other embodiments)
The demodulation module according to the embodiment of the present disclosure has been described above based on the embodiment and the like, but the present disclosure is not limited to this embodiment. For example, another embodiment realized by arbitrarily combining the components described in the present specification and excluding some of the components may be the embodiment of the present disclosure. The present disclosure also includes modifications obtained by making various modifications that can be conceived by those skilled in the art within the scope of the gist of the present disclosure, that is, the meaning indicated by the wording described in the claims, with respect to the above-described embodiment. Will be.

The forms shown below may also be included within the scope of one or more aspects of the present disclosure.

(1) A part of the components constituting the demodulation module may be a computer system including a microprocessor, ROM, RAM, hard disk unit, display unit, keyboard, mouse and the like. A computer program is stored in the RAM or the hard disk unit. The microprocessor achieves its function by operating according to the computer program. Here, a computer program is configured by combining a plurality of instruction codes indicating commands to a computer in order to achieve a predetermined function.

(2) A part of the components constituting the demodulation module may be composed of one system LSI (Large Scale Integration: large-scale integrated circuit). A system LSI is a super-multifunctional LSI manufactured by integrating a plurality of components on one chip, and specifically, is a computer system including a microprocessor, ROM, RAM, and the like. .. A computer program is stored in the RAM. When the microprocessor operates according to the computer program, the system LSI achieves its function.

(3) Some of the components constituting the demodulation module may be composed of an IC card that can be attached to and detached from each device or a single module. The IC card or the module is a computer system composed of a microprocessor, ROM, RAM and the like. The IC card or the module may include the above-mentioned super multifunctional LSI. When the microprocessor operates according to a computer program, the IC card or the module achieves its function. This IC card or this module may have tamper resistance.

(4) Further, a part of the components constituting the demodulation module is a recording medium capable of reading the computer program or the digital signal by a computer, for example, a flexible disk, a hard disk, a CD-ROM, an MO, a DVD, or the like. It may be recorded on a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) Disc), a semiconductor memory, or the like. Further, it may be the digital signal recorded on these recording media.

In addition, some of the components constituting the demodulation module transmit the computer program or the digital signal via a telecommunication line, a wireless or wired communication line, a network represented by the Internet, data broadcasting, or the like. It may be the one to do.

(5) The present disclosure may be the method shown above. Further, it may be a computer program that realizes these methods by a computer, or it may be a digital signal composed of the computer program.

(6) Further, the present disclosure is a computer system including a microprocessor and a memory, in which the memory stores the computer program, and the microprocessor may operate according to the computer program. ..

(7) Further, another independent computer system by recording and transferring the program or the digital signal on a recording medium, or by transferring the program or the digital signal via the network or the like. It may be carried out by.

(8) The above-described embodiment and the above-mentioned modification may be combined.

The demodulation module of the present disclosure can be used in a receiving device or the like for receiving a broadcast signal of digital broadcasting.

11, 12, 13, 14, 15, 16, 17, 18, 21, 22, 31, 32, 41, 42, 43, 44, 45, 46 Input terminals 11z, 12z, 21z, 22z, 31z, 32z, 36z , 37z, 41z, 42z, output terminal 61, 62, 63, 64, 65, 66, 67, 68 RF section 71, 72, 73, 74, 76, 77, 78, 81 Demodition section 91, 92 Synthesis section 100, 100A, 100B, 100C Demodition module 101 Receiver 110 1st processing unit 111 1st demographic unit 111a AD conversion unit 111b Demolition core unit 111c Error correction unit 112 1st selection unit 113 1st synthesis unit 120 2nd processing unit 121 2nd Demodition unit 122 2nd selection unit 123 2nd synthesis unit 132 3rd selection unit 142 4th selection unit c11 1st synthetic TS signal c12 2nd synthetic TS signal i11 1st IF signal i12 2nd IF signal s11 1 selection signal s12 2nd selection signal t1a, t1b, t1c 1st input TS signal t2a, t2b, t2c 2nd input TS signal ts1 1st internal TS signal ts2 2nd internal TS signal ts3 3rd Internal TS signal ts4 4th internal TS signal 200, 200A, 200B Demodition module 210 1st AD conversion unit 220 2nd AD conversion unit 230 1st demodulation error correction unit 240 2nd demodulation error correction unit 250 TS selection unit 260 1st selection unit 270 Second selection unit c21 First conversion signal c22 Second conversion signal i21 First IF signal i22 Second IF signal M21 First mode M22 Second mode t21 First TS signal t22 Second TS Signal s26 First selection signal s27 Second selection signal 300, 300A, 300B Demodition module 301 Receiver 310 First demodulation unit 320 Second demographic unit 330 First signal shaping unit 340 Second signal shaping unit 350 Output selection unit G31 1st output terminal group G32 2nd output terminal group f31 1st shaped TS signal f32 2nd shaped TS signal i31 1st IF signal i32 2nd IF signal M31 1st output form M32 2nd output form M33 3rd Output form M34 Fourth output form t31 First TS signal t32 Second TS signal T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 Terminal 400, 400A, 400B, 400C , 400D, 400E Demodition module 410 1st AD conversion unit 420 2nd AD conversion unit 430 1st selection unit 440 2nd selection unit 450 Demodulation error correction unit c41 1st conversion signal c42 2nd conversion signal i41, i42 IF signal t41, t42 TS signal s41 1st selection signal s42 2nd selection signal S4a, S4b Setting information b41, b43 Baseband I signal b42, b44 Baseband Q signal 500, 500A Demodulation module 501 Receiver 503, 504 RF unit 505 Decoder unit 506 Display unit 510 First demodulation processing unit 511 AD conversion unit 512 Time processing unit 513 FFT unit 514 Frequency processing unit 515 Transmission line estimation unit 516 SISO equalization unit 520 Second demodulation processing unit 521 AD conversion unit 522 Time processing unit 523 FFT unit 524 Frequency processing unit 525 Transmission path estimation unit 526 SISO equalization unit 530 MIMO Equalization unit 541 1st selection unit 542 2nd selection unit 543 3rd selection unit 544 4th selection unit 551 1st error correction unit 552 2nd error correction unit 560 Synthesis unit At1 Horizontal polarization antenna At2 Vertical polarization antenna a51 1st analog signal a52 2nd analog signal c50 Synthetic signal e51 1st error correction signal e52 2nd error correction signal m51 1st MIMO processing signal m52 2nd MIMO processing signal M51 MIMO reception mode M52 SIMO reception Mode mm1 MIMO processed TS signal p51 1st transmission line estimation signal p52 2nd transmission line estimation signal s51 1st SISO equalization signal s52 2nd SISO equalization signal ss1 1st SISO processing TS signal ss2 2nd SISO processed TS signal

Claims (5)

It is a demodulation module capable of demodulating the broadcast signal of digital broadcasting and outputting two TS (Transport Stream) signals.
A first IF (Intermediate Frequency) signal generated based on the broadcast signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first IF (Analog Digital) conversion process is performed based on the AD conversion process. The first AD conversion unit that outputs the conversion signal and
A first demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process is performed on the first converted signal, and a first TS signal based on the first demodulation process is output. The first demodulation error correction section and
A second AD conversion in which a second IF signal generated based on the broadcast signal is input, AD conversion processing is performed on the second IF signal, and a second conversion signal based on the AD conversion processing is output. Department and
A second demodulation process including at least one of synchronization processing, waveform equalization processing, and error correction processing is performed on the second conversion signal, and a second TS signal based on the second demodulation processing is output. The second demodulation error correction section and
A TS selection unit to which the first TS signal and the second TS signal are input and the TS signal of either the first TS signal or the second TS signal is selected and output.
Equipped with
The demodulation module has a first mode and a second mode.
The TS selection unit selects the first TS signal in the first mode, and in the second mode, the first demodulation process and the second demodulation process perform demodulation processing based on different parameters. A demodulation module that selects the TS signal that can be correctly demodulated from the first TS signal and the second TS signal. The demodulation module according to claim 1, wherein in the second mode, the first IF signal and the second IF signal are generated in a state where the same channel is selected. It is a demodulation module capable of demodulating the broadcast signal of digital broadcasting and outputting two TS (Transport Stream) signals.
A first IF (Intermediate Frequency) signal generated based on the broadcast signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first IF (Analog Digital) conversion process is performed based on the AD conversion process. The first AD conversion unit that outputs the conversion signal and
A first demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process is performed on the first converted signal, and a first TS signal based on the first demodulation process is output. The first demodulation error correction section and
A second AD conversion in which a second IF signal generated based on the broadcast signal is input, AD conversion processing is performed on the second IF signal, and a second conversion signal based on the AD conversion processing is output. Department and
A second demodulation process including at least one of synchronization processing, waveform equalization processing, and error correction processing is performed on the second conversion signal, and a second TS signal based on the second demodulation processing is output. The second demodulation error correction section and
A TS selection unit to which the first TS signal and the second TS signal are input and the TS signal of either the first TS signal or the second TS signal is selected and output.
Equipped with
Further, the first conversion signal and the second conversion signal are input, and either the first conversion signal or the second conversion signal is selected, and the selected signal is used as the first selection signal. Equipped with a first selection unit to output
The first selection unit outputs the second conversion signal as the first selection signal in the first mode, or uses the first conversion signal as the first selection signal in the second mode. Output and
The second demodulation error correction unit receives the first selection signal in place of the second conversion signal, performs the second demodulation process on the first selection signal, and performs the second demodulation process. A demodulation module that outputs a second TS signal based on demodulation processing. It is a demodulation module capable of demodulating the broadcast signal of digital broadcasting and outputting two TS (Transport Stream) signals.
A first IF (Intermediate Frequency) signal generated based on the broadcast signal is input, an AD (Analog Digital) conversion process is performed on the first IF signal, and a first IF (Analog Digital) conversion process is performed based on the AD conversion process. The first AD conversion unit that outputs the conversion signal and
A first demodulation process including at least one of a synchronization process, a waveform equalization process, and an error correction process is performed on the first converted signal, and a first TS signal based on the first demodulation process is output. The first demodulation error correction section and
A second AD conversion in which a second IF signal generated based on the broadcast signal is input, AD conversion processing is performed on the second IF signal, and a second conversion signal based on the AD conversion processing is output. Department and
A second demodulation process including at least one of synchronization processing, waveform equalization processing, and error correction processing is performed on the second conversion signal, and a second TS signal based on the second demodulation processing is output. The second demodulation error correction section and
A TS selection unit to which the first TS signal and the second TS signal are input and the TS signal of either the first TS signal or the second TS signal is selected and output.
Equipped with
Further, a second selection in which the first IF signal and the second IF signal are input, and one of the first IF signal and the second IF signal is selected and output as a second selection signal. With a part
The second selection unit outputs the second IF signal as the second selection signal in the first mode, or uses the first IF signal as the second selection signal in the second mode. Output and
The second AD conversion unit receives the second selection signal in place of the second IF signal, performs AD conversion processing on the second selection signal, and performs a second AD conversion process based on the AD conversion process. A demodulation module that outputs a conversion signal. The demodulation module has the first mode and the second mode.
The TS selection unit selects the first TS signal in the first mode, and in the second mode, the TS that can be correctly demodulated from the first TS signal and the second TS signal. The demodulation module according to claim 3 or 4, wherein the signal is selected.

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