JP6637233B2 - Electronic equipment and display method - Google Patents

Description

  Embodiments described herein relate generally to an electronic device and a display method.

  In recent years, the introduction of so-called 4K broadcasts (3840 × 2160) and 8K broadcasts (7680 × 4320) having a resolution four times or eight times the horizontal and vertical resolutions of the current HD (High Definition) (2K) broadcasts has been introduced in Japan. It is also being considered for satellite broadcasting.

  However, if it is attempted to introduce 4K broadcasting or 8K broadcasting while maintaining the current broadcasting, it is necessary to newly secure a large-capacity broadcasting band. In addition, when a current broadcaster provides a 4K / 8K broadcast service, there is a concern that the burden of program production and service operation costs will increase because of different video resolutions and encoding methods.

  For this reason, for example, the second version of the HEVC (High efiiciency Video Coding) standard (ISO / IEC23008-2), which is the latest video coding standard standardized by the Moving Picture Experts Group (MPEG) in July 2014, Application of SHVC (Scalable High Efficiency Video Coding) (scalable HEVC), which is extended and defined therein, is being studied. Specifically, the SHVC system is based on the MPEG-2 Video video coding system for HD signals, and this decoded image is also extended and used for HEVC coding of 4K / 8K signals as a reference image.

  When adding, expanding, and introducing such new services, there is a concern that some of the existing receivers may cause unexpected operations. Can be difficult.

  When receiving and reproducing a signal by SHVC or the like in a receiver compatible with 4K / 8K broadcasting, a main channel (current broadcasting signal (reference video signal)) and a subchannel (extended broadcasting signal (extended video signal)) are used. Since real-time processing is performed in parallel, the processing load for generating high-quality video from the main channel and sub-channel of the receiver is high, power consumption increases, and high-quality video is displayed after switching channels. A delay time until the time may occur.

JP-A-10-70725

  An object of one embodiment of the present invention is to provide an electronic device and a display method for effectively displaying a high-quality image.

The electronic device according to the present embodiment includes at least one tuner, a first video signal,
A receiving unit that receives a second video signal used to improve the quality of the first video signal;
Decoding a first video signal to generate a first video of a first resolution; decoding a first video signal and a second video signal to generate a first video of the first resolution; Can also generate a second video with a high resolution of the second resolution, a decoding unit that outputs one of the first video and the second video, and the receiving unit receives the second video signal The second unit generated by the decoding unit.
A detection unit that detects a program name of a program in the video of the first video or the second video when a resolution of a region in which the first video or the second video is displayed is larger than a threshold value. Determining whether to display the second video or the first video in the area based on the detected program name and the previously set term, and display either one, A control unit configured to display the first image in the area when the resolution of the area in which the image or the second image is displayed is equal to or smaller than a threshold value.

FIG. 1 is a schematic diagram illustrating an example of the transmission / reception system 1 according to the first embodiment. FIG. 2 is a block diagram illustrating an example of the receiver according to the first embodiment. FIG. 3 is a block diagram illustrating an example of a decoding processing unit provided in the signal processing unit of the receiver. FIG. 4 is a flowchart illustrating the operation of the receiver according to the first embodiment. FIG. 5A is a diagram illustrating an example of a case where a sub-picture is displayed. FIG. 5B is a diagram showing an example of channel selection of a sub-picture in the case of FIG. 5A. FIG. 6A is a diagram illustrating an example of a case where a thumbnail image is displayed. FIG. 6B is a diagram showing an example of channel selection of a thumbnail video in the case of FIG. 6A. FIG. 7 is a diagram illustrating an example of channel selection when displaying a plurality of screens. FIG. 8 is a diagram showing an example of selecting a thumbnail video displayed on the recording list. FIG. 9 is a diagram illustrating an example of channel selection of a thumbnail video displayed on the editing screen. FIG. 10 is a block diagram illustrating an example of a receiver according to Modification Example 1 of the first embodiment. FIG. 11 is a flowchart illustrating an operation of the receiver 5 according to the first modification of the first embodiment. FIG. 12 is a block diagram illustrating an example of a receiver according to the second embodiment. FIG. 13 is a flowchart illustrating the operation of the receiver 5 according to the second embodiment. FIG. 14A is a diagram illustrating an example of a predicted channel during zapping, and FIG. 14B is a diagram illustrating an example of a predicted channel during zapping. FIG. 15A is a diagram illustrating an example of a predicted channel during zapping, and FIG. 15B is a diagram illustrating an example of a predicted channel during zapping. FIG. 16 is a flowchart illustrating the operation of the receiver 5 according to the second modification of the second embodiment. FIG. 17 is a diagram illustrating an example of a display switching setting screen according to Modification 2 of the second embodiment. FIG. 18 is a diagram illustrating an example of a setting screen on which display switching can be set for each item. FIG. 19 is a block diagram illustrating an example of a receiver according to the third embodiment. FIG. 20 is a flowchart illustrating the operation of the receiver according to the third embodiment. FIG. 21 is a block diagram illustrating an example of a receiver according to the fourth embodiment. FIG. 22 is an example of a display setting screen for a high-quality image according to the fourth embodiment. FIG. 23A is an example of a display setting screen for a high-quality image according to the fourth embodiment, and FIG. 23B is an example of a display setting screen for a high-quality image according to the fourth embodiment. FIG. 24A is an example of a display setting screen for high-quality video according to the fourth embodiment, and FIG. 24B is an example of a display setting screen for high-quality video according to the fourth embodiment. FIG. 25 is a flowchart illustrating the operation of the receiver according to the fourth embodiment. FIG. 26 is a block diagram illustrating an example of a receiver according to the fifth embodiment. FIG. 27 is a flowchart illustrating the operation of the receiver 5 according to the fifth embodiment. FIG. 28 is a schematic diagram illustrating an example of a transmission / reception system 1 according to a modification. FIG. 29 is a diagram illustrating an example of a case where a thumbnail image according to a modification is displayed.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic diagram illustrating an example of the transmission / reception system 1 according to the first embodiment.
The transmitting / receiving system 1 of the present embodiment includes a transmitter (transmitting device) 3 and a receiver (receiving device, electronic device) 5. In the transmission / reception system 1, the transmitter 3 and the receiver 5 are connected by wired and / or wireless broadcast and communication transmission paths, respectively. In the transmission / reception system 1, the transmitter 3 distributes a program content using, for example, a broadcast wave or an IP network as a medium.

  The transmitter 3 attaches various information to an input base video (base video signal) to transmit contents (television programs (broadcast programs), satellite broadcast programs, distribution contents, videos, images, music, programs, and the like). Generate and transmit as a video signal. The base video is a high-quality video (first high-quality video signal) captured by an imaging device, for example, a camera. The high-quality video is, for example, a video of 4K (horizontal resolution 3840 / vertical resolution 2160 (or 1440), frame rate (video frequency) 60 Hz) or 8K (horizontal resolution 7680 / vertical resolution 4320, frame rate 120 Hz) ) This is an image having higher image quality than an image of 2K (the number of pixels in the horizontal direction is 1920, the number of pixels in the vertical direction is 1080, the frame rate is 60 Hz) such as an image. The transmitter 3 is configured by applying an SHVC (Scalable High Efficiency Video Coding) coding method to HD (High Definition) broadcasting. As shown in FIG. 1, in the SHVC broadcast, the transmitter 3 converts the content into a plurality of signals and transmits the plurality of signals through different transmission paths included in the transmission path 101. The transmission path 101 may be any transmission path as long as it is one or more transmission paths for transmitting a signal, such as a broadcast wave band or an IP network line.

  The transmitter 3 includes a reference video signal (first video signal) obtained by down-converting and encoding a high-quality video as a base video and an extended video signal (second video signal) encoded with reference to the reference video signal. Signal). The transmitter 3 outputs the reference video signal and the extended video signal converted by a predetermined conversion method to any one of the transmission paths included in the transmission path 101. The reference video signal is a signal that constitutes a content (a reference video (first video)), and may be, for example, a video signal encoded by MPEG2 that is being broadcast on a current terrestrial digital broadcast wave. The video signal may be different from the video signal currently being broadcast by the terrestrial digital broadcast wave. The extended video signal is used to improve the quality of the reference video signal. The extended video signal is a signal for extending the reference video to a high-quality video (high-quality video (second video)) by referring to the corresponding reference video signal. For example, the transmitter 3 outputs the reference video signal and the extended video signal through different transmission paths. The transmitter 3 transmits a signal to be output to each transmission path using a different transmission method corresponding to each conversion method. The transmission method is various means (format) related to signal transmission including a broadcast method, an encoding method, a transmission path, a transmission method, a transmission band, and a line type. For example, the transmitter 3 generates a reference video signal using an encoder based on the MPEG-2 coding method, and generates an extended video signal using an encoder based on the SHVC coding method (scalable coding method). In the SHVC encoding method, the SHVC encoder 44 can execute any of inter prediction (motion compensation prediction), intra prediction (intra-screen prediction), and inter-layer prediction (inter-picture prediction) to generate a predicted image.

  For example, the transmitter 3 outputs a reference video (image) signal (HD (2K) video signal (first video signal)) from an input base video and an extended video signal (complementary video of HD video for 4K video ( A second video signal)). The transmitter 3 transmits (transmits) the reference video signal and the extended video signal using different transmission paths and / or transmission schemes.

  The reference video signal output from the transmitter 3 includes PSI / SI (first PSI / SI), ECM (Entitlement Control Message) / EMM (Entitlement Management Message) (first ECM / EMM), time information, and the like. It has. The extended video signal includes PSI / SI (second PSI / SI), ECM / EMM (second ECM / EMM), time information, and the like. Here, the first PSI / SI and the second PSI / SI are information related to the same content (or base video). The second PSI / SI includes a descriptor (first channel selection control information) for allowing the PMT to refer to an ES of a signal transmitted by a different transmission path and / or a different transmission method. You may go out. Further, the second PSI / SI may include, for example, a descriptor (second channel selection control information) for newly associating the NIT with the reference video signal and the extended video signal. The second channel selection control information enables identification of signals transmitted by different transmission paths and different transmission schemes, and enables reference to signals transmitted by different transmission paths and different transmission schemes.

Here, the ECM is common information including information related to control of the receiver 5, and the EMM is individual information including personal contract information and information for decrypting the common information.
PSI and SI include PAT (Program Association Table), PMT (Program Map Table), NIT (Network Information Table), CAT (Conditional Access Table), and the like. The PAT is information for managing a program included in the stream. The PMT is information for managing data such as audio / video (A / V) constituting a content (program, program). The NIT is information for managing network-related settings, and includes information related to a network to be transmitted, such as a channel number, a modulation method, and a guard interval. The CAT is management information for pay broadcasting. For convenience of description, SI may be expressed as PSI as a part of PSI in some cases.

  The time information includes, for example, a PTS (Presentation Time Stamp), a DTS (Decoding Time Stamp), a system time reference value (STC), an SCR (System Clock Reference), and the like.

  The receiver 5 receives the content distributed from the transmitter 3 by satellite and / or terrestrial (terrestrial digital broadcast) broadcast, and displays the received content. Among the contents received and displayed by the receiver 5, a video as a main channel and a display signal (first display signal) of the video are converted into a broadcast signal, a main channel, a main service, and a main channel TS (Transport Stream). , A main video signal, an HD video signal, an HD broadcast signal, a 2K video signal, a current service, a current broadcast signal, and the like. A video as a sub-channel and a display signal of the video (a second display signal) are It may also be called a sub-service, a sub-channel TS, a high-quality video signal, a 4K video signal, a 4K broadcast signal, an extended service, an extended broadcast signal, and the like. Hereinafter, a channel provided in a remote controller (remote controller) or the like for displaying a signal of a content and a program in the receiver 5 is simply referred to as a channel unless otherwise specified.

  The receiver 5 is, for example, a television (TV), a personal computer (PC), a home server, a recorder, or the like. In the present embodiment, the receiver 5 is a 2K (2K1K), 4K (4K2K), and / or 8K (8K4K) compatible TV. Hereinafter, for convenience of description, the receiver 5 is described as a 2K / 4K compatible TV.

Hereinafter, the receiver 5 will be described in detail with reference to the drawings.
FIG. 2 is a block diagram illustrating an example of the receiver 5 according to the first embodiment.
The receiver 5 of this embodiment includes an antenna unit 104, an external input terminal 105, an input unit 111, a signal processing unit 112, a system controller (system control unit (control unit)) 113, a video processing unit 114, , Display unit 115, audio processing unit 116, audio output unit 117, operation unit 119, receiving unit 120, communication interface 121, network control unit 122, USB (Universal Serial Bus) interface 123, HDMI (High-Definition Multimedia Interface) (registered trademark) 124, a random access memory (RAM) 125, a non-volatile memory (NVM) 127, and a storage unit 129.

The antenna unit 104 receives a broadcast wave or the like and outputs it to the input unit 111. For example, the antenna unit 104 receives a reference video signal and an extended video signal transmitted on the transmission path 101 as broadcast waves, and outputs them to the input unit 111.
The external input terminal 105 is a terminal for connecting to a dedicated line, a terminal device, and / or an external device.

  The input unit 111 includes an antenna for receiving a broadcast, a tuner for selecting a received signal, and the like. The input unit 111 includes a plurality of tuners, for example, as shown in FIG. 5, eight tuners corresponding to a terrestrial digital broadcast signal, a BS (Broadcasting satellite) broadcast signal, a CS (Communications satellite) signal broadcast, and the like. . The input unit 111 is connected to an antenna, and receives a program or the like supplied by a broadcaster through a broadcast line and / or a spatial wave. For example, when a plurality of tuners are provided, the input unit 111 receives signals constituting a program of the plurality of tuners by at least one tuner. Further, the input unit 111 receives content (a program or the like) supplied via a transmission path and a network. The input unit 111 receives a broadcast stream (broadcast signal and extended broadcast signal), selects one or a plurality of program broadcasts, and sets the broadcast to be usable by the signal processing unit 112. The input unit 111 transmits all the received contents (programs and the like) of a predetermined number of channels to the signal processing unit 112. The input unit 111 can also acquire a signal from the external input terminal 105.

  The signal processing unit 112 includes a decoding processing unit 221. The signal processing unit 112 separates the program accompanying information multiplexed in the received broadcast signal, outputs the separated program accompanying information to the video processing unit 114, and outputs the recording stream to the system controller 113. The recording stream is information obtained by separating the program accompanying information from the broadcast stream received by the input unit 111 in the signal processing unit 112. The signal processing unit 112 displays the broadcast signal (broadcast signal and extended broadcast signal) obtained from the input unit 111 as a video signal (video) (first TS signal and second TS signal) and an audio signal (audio). Separate from control information. Further, the signal processing unit 112 performs a restoration process (decoding process) on the first TS signal and the second TS signal by the decoding processing unit 221. The signal processing unit 112 outputs the audio signal to the audio processing unit 116. Note that the signal processing unit 112 may include a plurality of decoding processing units 221. Details of the decryption processing unit 221 will be described later.

  The system controller (system control unit) 113 controls the operation of each unit of the receiver 5. That is, the system controller 113 includes an input unit 111, a signal processing unit 112, a video processing unit 114, a display unit 115, an audio processing unit 116, an audio output unit 117, a DMS unit 118, an operation unit 119, a receiving unit 120, a communication interface ( I / F) 121, a network control unit 122, a USB interface (I / F) 123, an HDMI 124, a storage unit 129, and the like. The system controller 113 is connected to each unit of the decoding processing unit 221 of the signal processing unit 112 described later, and controls processing of the decoding processing unit 221.

  The system controller 113 receives an input signal (operation instruction signal) from a remote control terminal (remote controller (remote controller)) 302, a keyboard 306, or a portable terminal, such as a smartphone, a mobile phone, a tablet, or a notebook PC, which is received by the receiving unit 120. ) Is output. Here, the control command is, for example, a command for instructing recording of a television method (program), reproduction of the recorded content (program), and the like.

Further, the system controller 113 includes a CPU 132, a decoding control unit 133, and a ROM (Read Only Memory) 138.
The CPU 132 is a main processor that controls operations. The CPU 132 can read and execute setting information included in the ROM 138, the NVM 127, and the like. In addition, the CPU 132 controls each unit of the system controller 113 in response to an instruction of a circuit or the like included in the system controller 113 described later. The CPU 132 receives the operation information from the operation unit 119 provided in the main body of the receiver 5 or the operation information transmitted from the remote controller 302 and received by the reception unit 120, so that the operation content of the operation information is reflected. Each part of the receiving device 5 is controlled as described above.

  The decoding control unit 133 controls a decoding process by at least two demultiplexing units and a decoder. In the present embodiment, the decoding control unit 133 controls the decoding process of at least one decoding processing unit 221. The decoding control unit 133 controls the operation of the decoding processing unit 221 and controls the power supply in accordance with an instruction from the CPU 132. Further, the decoding control unit 133 can also receive signals directly from each unit of the receiver 5 other than the CPU 132 and control the decoding processing unit 221. For example, the decoding processing unit 221 may control only a decoding process in a second signal processing unit 602 described below. The decoding control unit 133 is an electronic circuit or the like. Note that the decoding control unit 133 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.

The ROM (read only memory) 138 holds a control program executed by the system controller 113 (CPU 132).
The video processing unit 114 decodes the video signal (the first display signal and / or the second display signal) acquired from the signal processing unit 112 and has a predetermined resolution and Convert to output format. The video processing unit 114 receives an output signal from the system controller 113 and generates an OSD (On Screen Display) signal. For example, the video processing unit 114 generates a display signal of an integrated program guide as an OSD signal. The video processing unit 114 combines (multiplexes) the OSD signal and the converted video signal, and outputs a combined video signal of the OSD signal and the converted video signal to the display unit 115. The video processing unit 114 may output the above-described composite video signal to an output terminal of an external monitor device or a projection device (projector device) connected as an external device.

  The display unit 115 displays the composite video signal from the video processing unit 114 as a video. When the receiving unit 120 receives operation signals from the remote controller 302 and other portable terminals, the display unit 115 displays an image according to the operation signals. Also, when an operation signal is output from the keyboard 306 via the USB interface 123, the display unit 115 can display an image according to the operation signal from the keyboard 306. Hereinafter, a video generated by encoding the reference video signal may be referred to as a reference video, and a video generated by encoding the reference video signal and the extended video signal may be referred to as a high-quality video.

  The audio processing unit 116 decodes an audio / audio signal (audio) of the program received by the input unit 111 and outputs the decoded signal to the audio output unit 117.

The operation unit 119 inputs a control command corresponding to a direct operation by the user to the system controller 113.
The receiving unit 120 inputs a control command corresponding to an input signal from an external terminal, for example, the remote controller 302, a portable terminal, or the like, to the system controller 113.

  The communication interface 121 realizes wireless communication with a short-range wireless communication device that conforms to, for example, the WiFi (Wireless Fidelity) standard. As the short-range wireless communication standard, for example, Bluetooth (registered trademark) standard, NFC (Near Field Communication), or the like can be used. The communication interface 121 may be either a wired system or a wireless system, and is connected to, for example, a communication unit capable of transmitting and receiving signals to and from a wireless keyboard, a mouse, and the like. The communication interface 121 can also communicate with, for example, a card reader (reading unit) 304 capable of communicating with a non-contact card medium.

  The network control unit 122 controls access to an external network, for example, the Internet (IP network). The network control unit 122 executes transmission and reception of information on the Internet (IP network). For example, the network control unit 122 can receive extended video information via an IP network. In this case, the network control unit 122 inputs the extended video signal to the input unit 111 according to the instruction signal of the CPU 132. Note that the network control unit 122 may receive the reference video signal and / or the extended video signal and output the received video signal to the input unit 111.

The USB interface 123 is connected to, for example, an external device conforming to the USB standard, for example, a keyboard 306 or the like.
The HDMI 124 enables wired communication between a plurality of devices using the HDMI standard or the MHL (Mobile High-definition Link) standard.

A RAM (random access memory (work memory)) 125 provides a work area to the system controller 113 (CPU 132).
An NVM (non-volatile memory) 127 holds various setting information and control information of the receiver 5. The non-volatile memory 127 can also hold the program table construction content information. For example, the non-volatile memory 127 includes setting information of a display screen for displaying various types.

  For example, the nonvolatile memory 127 may include a threshold value (display threshold value) for the resolution of the display area of the display image. The display threshold is information referred to when the decoding control unit 133 controls the decoding processing unit 221. The reference resolution may be a resolution smaller than the resolution of the 4K or 8K video, a resolution of 1/4 of the 4K video, or the like.

  Further, the non-volatile memory 127 may include information of a reference resolution (for example, the resolution of the display video before switching) in the setting information. Here, the reference resolution may be arbitrarily set by the user or may be set in advance. In addition, the reference resolution may be the resolution of the currently displayed display image or the resolution of the image of the highest image quality supported by the receiver 5. For example, the reference resolution may be a resolution of 4K or 8K video, a resolution of 1/4 of 4K video, or the like. The reference resolution may be recorded on another recording medium, or may be stored in the ROM 138 or the like.

  The setting information of the display screen is information such as the resolution (display resolution) or the size of the display screen when various images such as sub-images, two-screen display, and thumbnail images are displayed on the screen of the display unit 115. The setting information of the display screen may be recorded on another recording medium, or may be stored in the ROM 138 or the like.

  The setting information also includes information (judgment information) used to determine which of the reference image (low-quality image) and the high-quality image (extended image) is to be displayed. In this case, the information included in the determination information may be set for each type of high-quality video (4K resolution or 8K resolution), or may be arbitrarily set by the user via the remote controller 302 or the like. May be set in advance at the manufacturing stage. The determination information used to determine which of the reference video and the high-quality video is to be displayed is displayed for each video display mode (for example, cloud menu, sub-video, multiple screen display, thumbnail video display, etc.). The information indicating whether the video to be output is either the reference video or the high-quality video may be a threshold value (display threshold value) of the size (resolution) of the area displaying the video.

  The storage unit 129 is, for example, an HDD (Hard Disk Drive), and records various setting information of the receiver 5, received contents, images displayed on the display unit 115, and the like. The storage unit 129 may be connected via the USB interface 123 as an external device.

Next, the configuration of the decoding processing unit 221 will be described below with reference to the drawings.
FIG. 3 is a block diagram illustrating an example of the decoding processing unit 221 provided in the signal processing unit 112 of the receiver 5.
The decoding processing unit 221 performs a decoding process on the broadcast signal selected by the input unit 111, and restores a video signal, an audio signal, caption / text super information, and program related information. The decoding processing unit 221 further includes a processing system for audio signals and various information (signals), but is not shown for simplicity. In FIG. 3, two types of lines are shown, but double lines indicate input / output of a content signal, for example, a signal including a video signal, and solid lines do not include a control video signal, for example, a control signal. It shows input and output of signals including signals and information (signals). Note that the first signal processing unit 601 and the second signal processing unit 602 have a common system time reference value (System Time Clock: STC).

  The decoding processing unit 221 includes a plurality of input terminals and a transmission line composite unit for inputting various signals. In the present embodiment, the decoding processing unit 221 includes input terminals 60 and 80, transmission line decoding units 62 and 82, a clock reproduction control unit 72, an up converter 74, a buffer 76, an output selector (tuning unit) 96, , An output terminal 97, a first signal processing unit 601, and a second signal processing unit 602. Note that each unit of the decoding processing unit 221 is controlled by the CPU 132. That is, the CPU 132 controls the clock reproduction control unit 72, the up-converter 74, the buffer 76, the output selector 96, the first signal processing unit 601, the second signal processing unit 602, and the like.

  In the present embodiment, the broadcast signal is input to the input terminal 60 and output to the transmission path decoding unit 62. The input terminal 80 receives the extended broadcast signal and outputs it to the transmission path decoding unit 82. The transmission path decoding units 62 and 82 demodulate the input broadcast signal, and the decoding processing corresponding to the transmission path is canceled by the transmission path decoding processing. The transmission path decoding units 62 and 82 output the decoded signals (the first TS signal and the second TS signal).

  The clock reproduction control unit 72 generates second clock information for synchronizing the decoding timing, and outputs the time information acquired from the second demultiplexing unit 84. Further, since the STC is common to the clock reproduction control unit 72, the clock reproduction control unit 72 can synchronously control the decoder 68 and the SHVC decoder 78 based on the PCR.

The up-converter 74 up-converts the resolution, screen size, and color band of the input video signal. The up-converter 74 up-converts the video signal (second decoded video signal) decoded by the decoder 68, generates a video signal (second enlarged decoded video) signal generated by the up-conversion, and generates the second expanded decoded video signal. Is output. For example, the up-converter 74 converts the resolution of the input 2K video signal to the resolution of a 4K video signal (second enlarged 4K video signal).
The buffer 76 is a storage area circuit for temporarily storing various signals.

  The output selector 96 selects an image included in the input video signal at a predetermined display timing based on the time information, and arranges the images in time series to output the video. The output selector 96 can also output information (signals) including audio and a program guide in association with a video to be output. The output selector 96 outputs the selected video signal (selected video signal) and selection information for identifying the selected video signal. In the receiver 5, the output selected video signal is displayed on the display unit 115 via the video processing unit 114. The output selector 96 can also select and output a video signal according to a signal (instruction signal) from the PSI / SI processing unit 90 and the CPU 132.

  In the present embodiment, the output selector 96 can select a signal to be output to the main channel and the sub channel and output it as a selection signal (selected video signal) using only the information of the second PSI / SI of the extended video signal. it can. In this case, the output selector 96 can select and output an ES (Elementary Stream) (component) included in different TSs according to an instruction signal from the PSI / SI processing unit 90 and the CPU 132 described later. For example, the output selector 96 can insert an image included in a video output on the main channel into a video displayed as a sub-channel, for example, a 4K video signal. The output selector 96 can also output audio output on the main channel so as to correspond to 4K video displayed as a sub-channel.

  The first signal processing unit 601 receives the first TS signal from the input terminal 60 and decodes the first TS signal into a main channel video signal (first display signal). The second signal processing unit 602 receives the second TS signal from the input terminal 80 and decodes the second TS signal into a sub-channel video signal (second display signal). The first signal processing unit 601 decodes, for example, a first TS signal into a 2K video signal, and the second signal processing unit 602 generates, for example, a first TS signal (2K video signal) and a second TS signal. The signal (extended video signal of 4K broadcast video) is decoded into a second high quality video signal (4K video signal). Note that the first signal processing unit 601 has substantially the same configuration as a receiver that supports current TV broadcasting, for example, HD broadcasting. That is, a current receiver, for example, a TV receiver, can receive and display an HD (2K) broadcast signal even when applied to the transmission / reception system 1 of the present embodiment.

The configurations of the first signal processing unit 601 and the second signal processing unit 602 will be described.
First, the first signal processing unit 601 will be described below.
The first signal processing unit 601 includes a first demultiplexing / demultiplexing unit 64, a first descrambler 66, a first ECM / EMM processing unit 70, and a decoder 68.

  The first demultiplexing unit 64 separates the input signal into various information (signals) and a video signal, and outputs the separated various signals. In addition, the first demultiplexing unit 64 includes a PID filter (first PID filter) 641 that captures only a signal that satisfies the set filter condition. The first demultiplexer 64 can set the value of the PID filter 641 according to the instruction signal from the CPU 132. The first demultiplexer 64 extracts the PAT, extracts the PID of the PMT of the content specified by the operation signal or the like, extracts the PMT specified by the PID, and extracts the video signal specified by the PMT. And outputs the extracted video signal and time information signal.

  The first descrambler 66 performs a decryption process on the input signal. The first descrambler 66, for example, releases various signals encrypted with the scramble key. The first descrambler 66 executes, for example, a process of decrypting MULTI2.

  The first ECM / EMM processing unit 70 performs a process of extracting the scramble key from the ECM and the EMM from the input signal. The first ECM / EMM processing unit 70 decrypts the encrypted EMM with a unique key related to the receiver 5, and extracts a work key from the decrypted EMM. Next, the first ECM / EMM processing unit 70 decrypts the ECM using the work key, and extracts a scramble key from the decrypted ECM. The first ECM / EMM processing unit 70 outputs information on the extracted scramble key.

  The decoder 68 depacketizes the input signal and executes a decoding process of the depacketized signal. The decoder 68 decodes the encoded signal and outputs a decoded reference video (of the resolution). Hereinafter, the resolution of the reference image may be referred to as a first resolution. The decoder 68 decodes, for example, a signal encoded in the MPEG-2 encoding format, and outputs a decoded 2K video signal. Note that the reference video signal may be simply referred to as a reference video.

Next, the second signal processing unit 602 will be described below.
The second signal processing unit 602 includes a second demultiplexing unit 84, a second ECM / EMM processing unit 86, a second descrambler 88, a PSI / SI processing unit 90, an SHVC decoder 78, , A metadata processing unit 92 and an image quality improving processing unit 94.

  The second demultiplexing unit 84 separates the input signal into various information (signals) and a video signal, and outputs the separated various signals. The second demultiplexing unit 84 outputs time information included in the input signal to the clock reproduction control unit. The second demultiplexing unit 84 includes a PID filter (second PID filter) 642 that captures only a signal that satisfies the set filter condition. The second demultiplexer 84 can set the value of the PID filter 642 according to the instruction signal of the CPU 132. The second demultiplexing unit 84 extracts the PAT from the PSI, extracts the PID of the PMT of the content specified by the operation signal or the like, extracts the PMT specified by the PID, and extracts the video signal specified by the PMT. It takes out and outputs the taken out video signal and time information signal. When the second demultiplexing unit 84 extracts an invalid PID value (0x1FFF) for the elementary_PID in the data structure of the PMT, it identifies that the component is specified in a signal of a different transmission path and transmission method. And output identification information.

  The second ECM / EMM processing unit 86 performs a process of extracting the scramble key from the ECM and the EMM from the input signal. The first ECM / EMM processing unit 70 decrypts the encrypted EMM with a unique key related to the receiver 5, and extracts a work key from the decrypted EMM. Next, the first ECM / EMM processing unit 70 decrypts the ECM using the work key, and extracts a scramble key from the decrypted ECM. The first ECM / EMM processing unit 70 outputs information on the extracted scramble key.

  The second descrambler 88 performs a decryption process on the input signal. The second descrambler 88, for example, releases each of the various signals that have been encrypted with the scramble key. The second descrambler 88 executes, for example, AES decryption processing.

  The PSI / SI processing unit 90 processes the program specifying information (PSI) and the service information (SI) according to the instruction signal of the CPU 132, and outputs information (signal) related to the PSI, the SI, and the like. The PSI / SI processing unit 90 transmits and receives signals to and from the first demultiplexing unit 64, the second demultiplexing unit 84, and the output selector 96.

  For example, the PSI / SI processing unit 90 reads the PMT in which the first tuning control information included in the second PSI / SI is described according to the instruction signal of the CPU 132, so that not only the ES in the same signal but also the ES is used. The same processing as referring to the PMT included in the PSI in a different signal (TS signal) can be performed, and the ES in the different TS signal can be referred to. That is, the receiver 5 (CPU 132) only refers to the PMT of the second PSI, and does not refer to the PMT of the first PSI / SI of the reference video signal (the first TS signal). The ES included in the TS signal can be referred to. As a result, the PSI / SI processing unit 90 can extract a necessary ES according to the instruction signal of the CPU 132 and generate a tuning list by the extracted ES only by referring to the PMT of the second PSI. For example, by reading the PMT (Service Y) included in the second PSI, the PSI / SI processing unit 90 performs processing equivalent to reading in the PMT (service X) included in the first PSI (the same processing). Information or the same service), and the ES included in the first TS signal can be referred to.

Further, the PSI / SI processing unit 90 reads the defined descriptor in the PMT included in the PSI, and refers to the ESs of signals transmitted by different transmission paths and different transmission schemes. The PSI / SI processing unit 90 extracts necessary ESs from signals transmitted by different transmission paths and different transmission schemes from the referenced ESs. The PSI / SI processing unit 90 generates a channel selection procedure including a video signal to be selected from the ES extracted in accordance with the instruction signal of the CPU 132, a display timing, and the like, and a channel selection list (channel selection information) that specifies displayable content. . Here, the channel selection list is information for controlling the channel selection such as a procedure (timing) of selecting a plurality of display signals to be selected and an instruction.
Note that the PSI / SI processing unit 90 may separately read the first PSI / SI of the reference video signal and the second PSI / SI of the extended video signal.

  Further, the decoding processing unit 221 includes a PSI / SI processing unit (first PSI / SI processing unit) (not shown) for the reference video signal and a PSI / SI processing unit (second PSI processing unit) for the extended video signal. / SI) (not shown) may be provided with a PSI / SI processing unit. In this case, the first PSI / SI processing unit reads the first PSI / SI from the reference video signal according to the instruction signal of the CPU 132, and extracts a necessary ES (first ES). The first PSI / SI processing unit outputs the extracted first ES to the first demultiplexing / demultiplexing unit 64, and outputs a tuning list to the output selector 96. Similarly, the second PSI / SI processing unit reads the second PSI / SI from the reference video signal according to the instruction signal of the CPU 132, and extracts a necessary ES (second ES). The second PSI / SI processing unit outputs the extracted second ES to the second demultiplexing unit 84, and outputs a channel selection list to the output selector 96. The first PSI / SI processing unit and the second PSI / SI processing unit output the extracted first ES and second ES to the output selector 96, respectively.

  The SHVC decoder 78 depacketizes the input signal and executes a decoding process on the depacketized signal. In the present embodiment, the SHVC decoder 78 executes a decoding process of an input scalable encoded (SHVC (MPEG-HEVC Video) encoded) video signal. The SHVC decoder 78, in accordance with the SHVC encoding scheme, decodes any one of inter prediction (motion compensation prediction), intra prediction (intra-screen prediction), and inter-layer prediction (inter-picture prediction) when decoding an extended prediction image. Can be executed. The SHVC decoder 78 decodes a scalable signal into an extended prediction video signal in an SHVC encoding format. For example, the SHVC decoder 78 performs inter-layer prediction of the decoded extended predicted video signal and a second enlarged video signal constituting a second enlarged video signal (for example, a 4K video signal), to thereby obtain a high-quality video (resolution). (A high quality image signal) (for example, a 4K video signal). Hereinafter, the resolution of a high-quality image may be referred to as a second resolution. The SHVC decoder 78 outputs the generated high-quality video signal. Note that the SHVC encoder 44 can also generate a high-quality video signal by a prediction method other than the inter-layer prediction. Note that a high-quality video signal may be simply described as a high-quality video.

  The metadata processing unit 92 generates, from the metadata, grading information for grading such as contrast, a color band, and a gradation characteristic for improving image quality, and outputs the generated grating information. The metadata processing unit 92 generates grating information related to a high-quality video, for example, a 4K video.

  The image quality improvement processing unit 94 enhances the image quality by grating the video signal input according to the grating information. The high-quality image processing unit 94 executes various image processing for providing a high-quality image such as a brightness, a contrast, a color band, and a filter effect.

FIG. 4 is a flowchart illustrating the operation of the receiver 5 according to the present embodiment.
When the receiver 5 is started, in S401, the CPU 132 detects whether or not an extension video signal (enhancement layer) has been received.

  In S402, the CPU 132 acquires high-quality video, for example, information of 4K resolution (horizontal resolution 3840 / vertical resolution 2160, frame rate 60 Hz). At this time, the CPU 132 uses, for example, setting information stored in the nonvolatile memory 127 to determine which of the reference video (low-quality video) and the high-quality video (extended video) is to be displayed. read out. This information may be set for each type of high-quality video (4K resolution or 8K resolution), may be set arbitrarily by the user via the remote controller 302 or the like, or may be set in advance at the manufacturing stage. May be. Information used to determine which of the reference video and the high-quality video is to be displayed should be displayed for each video display mode (for example, cloud menu, sub-video, multiple screen display, thumbnail video display, and the like). The video may be information indicating either the reference video or the high-quality video, or may be a threshold (display threshold) of the size (resolution) of the area displaying the video. In this case, when the form of the display image displayed on the display unit 115 is indicated as the display of the reference image, or when the size of the display area of the image is smaller than the display threshold, the decoding control is performed. The unit 133 controls the decoding processing unit 221 so as to decode only the reference video signal. That is, the receiver 5 displays the reference video on the display unit 115. When the form of the display image displayed on the display unit 115 is indicated by the display and setting information of the reference image, or when the display area of the image has a resolution larger than the display threshold, the decoding control unit 133 The decoding processing unit 221 is controlled so as to decode the signal and the extended video signal. The receiver 5 displays the high-quality video on the display unit 115.

In step S403, an operation signal for switching a display image displayed on the display unit 115 is received from the remote controller 302 or the like.
In S404, when receiving the operation signal for switching the display video, the CPU 132 acquires information on the display mode and display type of the display video displayed after the switching.

In S405, the CPU 132 determines whether or not the video displayed in the display mode and display type after display switching is larger than the display threshold.
When the display image of the display mode and the display type after the display switching is equal to or less than the display threshold (NO in S405), the CPU 132 executes the decoding process corresponding to the preset display mode and display type. 133, and outputs an instruction signal. The decoding control unit 133 receives the instruction signal from the CPU 132 and controls the decoding processing unit 221 so as to decode only the reference video signal.
In S406, the decoding processing unit 221 outputs the reference video. That is, the receiver 5 displays the reference video on the display unit 115.

When the display image of the display mode and the display type after the display switching is equal to or less than the display threshold (YES in S405), the CPU 132 executes the decoding process corresponding to the preset display mode and display type. 133, and outputs an instruction signal. The decoding control unit 133 receives the instruction signal from the CPU 132 and controls the decoding processing unit 221 to decode the reference video signal and the extended video signal.
In step S407, the decoding processing unit 221 outputs a high-quality video. That is, the receiver 5 displays the high-quality video on the display unit 115.

Hereinafter, some examples related to display switching in the receiver 5 of the present embodiment will be described with reference to the drawings.
FIG. 5A is a diagram illustrating an example of a case where a sub-image is displayed on a display image, and FIG. 5B is a diagram illustrating an example of channel selection of the sub-image in the case of FIG. 5A. 5A and 5B, the display image G1 is a high-quality image, for example, a 4K image, and the display image G2 is a sub-image displayed on the display image G1. The sub-picture is set in the setting information so as to be displayed at a resolution of 2K picture. The display threshold is １ ／ of the resolution of the 4K video (the size of the resolution of the 2K video).

  First, in FIG. 5B, a case where CPU 132 displays a display image corresponding to a display mode on display unit 115 in accordance with setting information will be described.

  As shown in FIG. 5B, when an operation signal is received from the remote controller 302, when the CPU 132 displays the display image G2 on the display image G1, the sub-image is displayed at a resolution of 2K image according to the setting information.

  Next, a case where the CPU 132 displays a display image corresponding to the display mode on the display unit 115 in accordance with the threshold of the setting information in FIG. 5B will be described.

  As shown in FIG. 5B, when an operation signal is received from the remote controller 302, the CPU 132 determines whether the resolution of the display image G2 is larger than the display threshold when displaying the display image G2 on the display image G1. I do. The decoding control unit 133 controls the decoding processing unit 221 according to an operation instruction from the CPU 132. In FIG. 5B, since the magnitude of the resolution of the display image G2 is equal to or smaller than the display threshold, the decoding control unit 133 decodes the extended image signal in accordance with the instruction signal of the CPU 132, that is, the decoding process of the second signal processing unit 602. To stop (or skip). The decoding processing unit 221 configures a sub-picture with a reference video signal and a 2K video signal, for example, in accordance with a current broadcast wave decoding process (for example, an MPEG-2 encoded signal decoding process). For example, when it is determined that the resolution of the display video after the display switching is equal to or less than the display threshold (a size of 1/4 of the resolution of the 4K video), the CPU 132 displays the 2K video as the sub-video after the display switching. It is displayed on the section 115.

FIG. 6A is a diagram illustrating an example of a case where a thumbnail image is displayed as a display image, and FIG. 6B is a diagram illustrating an example of channel selection of the thumbnail image in the case of FIG. 6A. The display threshold value is assumed to be a quarter of the resolution of the 4K video, as in FIGS. 5A and 5B.
In FIG. 6A, a display image G3 is a thumbnail image displayed when the d button B1 provided on the remote controller 302 is pressed. The thumbnail video is set in the setting information so as to be displayed at a resolution of 2K video.

  First, a case where the CPU 132 displays a display image corresponding to a display mode on the display unit 115 according to the setting information in FIG. 6B will be described.

  As shown in FIG. 6B, when an operation signal is received from the remote controller 302, when displaying the display image G2 on the display image G1, the CPU 132 displays the thumbnail image at a resolution of 2K image according to the setting information. .

  Next, in FIG. 6B, a case will be described in which the CPU 132 displays a display image corresponding to the display mode on the display unit 115 according to the threshold value of the setting information.

  As shown in FIG. 6B, when an operation signal is received from the remote controller 302, when displaying the display image G3, the CPU 132 determines whether or not the resolution of the display image G3 is equal to or less than the display threshold. The decoding control unit 133 controls the decoding processing unit 221 according to an instruction from the CPU 132. As shown in FIG. 6B, when the size of the resolution of the display image G3 is equal to or smaller than the display threshold, the decoding control unit 133 decodes the extended image signal in accordance with the instruction signal of the CPU 132, that is, the second signal processing unit 602 Stop (or skip) the decoding process. The decoding processing unit 221 composes a thumbnail video with a reference video signal, for example, a 2K video signal, according to, for example, a current broadcast wave decoding process (for example, an MPEG-2 encoded signal decoding process). For example, when it is determined that the size of the resolution of the display image after the display switching is equal to or less than the display threshold (a size of 1/4 of the resolution of the 4K image), the CPU 132 determines that the 2K thumbnail image after the display switching. The video is displayed on the display unit 115.

In addition to these examples, some examples will be described with reference to FIGS. 7, 8 and 9.
FIG. 7 is a diagram illustrating an example of channel selection when a plurality of screens are displayed, FIG. 8 is a diagram illustrating an example of channel selection of a thumbnail video displayed on a recording list, and FIG. FIG. 7 is a diagram showing an example of channel selection of a thumbnail video displayed in FIG. In the examples of FIGS. 7 to 9, the sub-pictures and the thumbnail pictures are set in the setting information so as to be displayed at a resolution of 2K pictures, as in FIGS. 5A to 6B. The display threshold is １ ／ of the resolution of the 4K video (the size of the resolution of the 2K video).

First, a case where the CPU 132 displays a display image corresponding to a display mode on the display unit 115 according to the setting information in FIGS. 7 to 9 will be described.
In the examples shown in FIGS. 7 to 9, the sub-picture and the thumbnail picture are displayed at the resolution of the 2K picture according to the setting information.

  Next, a case will be described in which the CPU 132 displays a display image corresponding to the display mode on the display unit 115 in accordance with the threshold value of the setting information in FIGS.

  As shown in FIG. 7, when a plurality of screens are displayed, the CPU 132 determines whether each of the display images (G4, G5) is larger than the display threshold.

As shown in FIG. 8, even when a thumbnail is displayed in the recording list, as described above,
The CPU 132 determines whether each display image (G6) is larger than the display threshold.

  As shown in FIG. 9, even when a plurality of thumbnail images are displayed on the edit screen, as described above, the resolution comparing unit 134 determines whether each of the display images (G7, G8) is larger than the display threshold. .

  In the examples shown in FIGS. 7 to 9, when it is determined that the resolution of the video displayed in the display area after the display switching is equal to or smaller than the display threshold, the CPU 132 determines the 2K video as the thumbnail video after the display switching. Is displayed on the display unit 115.

  According to the present embodiment, the receiver 5 stops (or skips) decoding of the high-quality video when the CPU 132 receives a request to display a video having a resolution smaller than the display threshold. For example, when the display threshold is set to 1/4 of the resolution of 4K, and the receiver 5 receives a request to display a video having a resolution of 2K, the receiver 5 receives the extended video signal and the reference video signal. When the processing for restoring a high-quality video, for example, a 4K video signal is stopped (or skipped) and a display request for a video having a resolution of 4K is received, the processing for restoring the 4K video signal is executed. For this reason, in the receiver 5 of the present embodiment, processing of generating a high-quality high-quality video, for example, a 4K video, for a video having a display threshold or less is suppressed. As a result, in the receiver 5, the processing time for the switching display is reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Furthermore, when decoding high-quality video from the extended video signal and the reference video signal, various processes are required, and the load and power consumption required for the process may increase. However, in the receiver 5 of the present embodiment, since the process of generating a high-quality image for an image having a resolution lower than the reference resolution is suppressed, the load and power consumption for these processes are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In this embodiment, the receiver 5 (CPU 132) outputs the reference video signal when the resolution of the display video displayed at the time of display switching is lower than the reference resolution. The display area of the display unit 115 may determine whether to display either the reference image or the high-quality image. For example, when the CPU 132 receives an operation instruction signal requesting display switching from the remote controller 302 and detects that the next display image to be displayed on the display unit 115 is smaller than the display area of the currently displayed display image. Then, a reference image is displayed on the display unit 115 as a display image.

  In the present embodiment, the receiver 5 can also receive the reference video signal and the extended video signal transmitted from the transmitter 3 via the IP network (Internet) included in the transmission path 101. For example, the receiver 5 may receive the reference video signal as a broadcast wave on a broadcast wave transmission path included in the transmission path 101, and may receive the extended video signal via an IP network included in the transmission path 101. .

  Next, a modified example of the receiver according to the first embodiment will be described. In the modified example of the embodiment, the same portions as those of the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

(Modification 1)
The receiver 5 according to the first modification of the first embodiment includes a resolution comparison unit 134 in addition to the configuration of the receiver 5 according to the first embodiment.

  FIG. 10 is a block diagram illustrating an example of the receiver 5 according to the first modification of the first embodiment.

  Further, the system controller 113 according to the first modification of the present embodiment further includes a resolution comparing unit 134.

  When receiving a signal for switching the video (display video) displayed on the display unit 115, the resolution comparison unit 134 detects the size of the resolution of the display video, and determines a reference resolution set in advance (for example, a resolution before switching). The magnitude of the resolution of the display video after the switching is compared with the magnitude of the resolution of the display video after switching. The resolution comparison unit 134 outputs a comparison result. The resolution comparing unit 134 is an electronic circuit or the like. The resolution comparison unit 134 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132. In the following, switching video displayed on the screen of the display unit 115 is referred to as display switching, and switching a video of a program to video of another program is referred to as program switching (channel switching).

FIG. 11 is a flowchart illustrating the operation of the receiver 5 according to the present embodiment.
When the receiver 5 is started, in S1101, the CPU 132 detects whether or not an extension video signal (enhancement layer) has been received. In step S1102, the CPU 132 acquires high-quality video, for example, information of a 4K resolution (horizontal resolution 3840 / vertical resolution 2160, frame rate 60 Hz). At this time, for example, the CPU 132 acquires information of the reference resolution (for example, the size of the resolution of the high-quality image) from the display information of the high-quality image included in the setting information stored in the nonvolatile memory 127. In step S1103, the CPU 132 displays a high-quality image that can be displayed on the display unit 115, for example, a 4K image.

  In step S1104, when an operation signal for switching the display image displayed on the display unit 115 is received from the remote controller 302 or the like, the CPU 132 acquires information on the size of the resolution of the display image displayed after the switching. At this time, the CPU 132 acquires, for example, information on the resolution at the time of being displayed on the display unit 115 such as the sub-picture, the multi-screen display, and the thumbnail picture display included in the setting information stored in the nonvolatile memory 127.

  In step S1105, the resolution comparison unit 134 compares the reference resolution with the resolution of the display image displayed after the display switching, and determines whether the resolution of the display image after the display switching is smaller than the reference resolution. I do.

If the resolution of the display image after the display switching is equal to or larger than the reference resolution (NO in S1105), the process returns to S1103.
If the resolution of the display video after the display switching is smaller than the reference resolution (YES in S1105), in S1106, the decoding control unit 133 stops or skips the decoding process of the extended video signal according to the instruction signal of the CPU 132. . At this time, the decoding control unit 133 stops the decoding process of the extended video signal by stopping the operation of part of the second signal processing unit 602 or stopping the power supply to the part according to the instruction signal of the CPU 132, Or you may skip.

  In order to stop or skip the decoding process of the extended video signal, the decoding control unit 133 sends the second TS signal (PID filter 642) of the second demultiplexing unit to the decoding processing unit 221 according to the instruction signal of the CPU 132. (Extended video signal). The decoding processing unit 221 decodes only the first TS signal (reference video signal) and outputs a reference video signal. That is, the decoding processing unit 221 stops or skips the decoding process of the second TS signal (extended video signal) according to the instruction signal of the decoding control unit 133.

  If the decoding process of the extended video signal is stopped or skipped in S1107, the CPU 132 displays the display video composed of the reference video signal as the display video displayed after switching the display to a part or the entire screen of the display unit 115. (Reference video) is displayed on the display unit 115.

  In S408, when an operation signal for switching the display image displayed on the display unit 115 is received again from the remote controller 302 or the like, the CPU 132 acquires information on the resolution of the display image displayed after the switching. At this time, in the same manner as described above, the CPU 132 determines, for example, the resolution at the time of being displayed on the display unit 115 such as the sub-picture, the multi-screen display, and the thumbnail picture included in the setting information stored in the nonvolatile memory 127. Get information.

  In step S1109, similarly to the processing in step S1105, the resolution comparing unit 134 compares the reference resolution with the resolution of the display image displayed after the display switching, and determines that the resolution of the display image after the display switching is smaller than the reference resolution. Determine if there is.

If the resolution of the display image after the display switching is smaller than the reference resolution (NO in S1109), the process returns to S1106.
If the resolution of the display image after the display switching is equal to or larger than the reference resolution (YES in S1109), in S1110, the CPU 132 causes the display screen of the display unit 115 to display a high-quality image, for example, a 4K image.

Hereinafter, some examples related to display switching in the receiver 5 of the first modification of the present embodiment will be described with reference to FIGS. 5A to 9 as in the first embodiment.
FIG. 5A is a diagram illustrating an example of a case where a sub-image is displayed on a display image, and FIG. 5B is a diagram illustrating an example of channel selection of the sub-image in the case of FIG. 5A. 5A and 5B, the display image G1 is a high-quality image, for example, a 4K image, and the display image G2 is a sub-image displayed on the display image G1. The reference resolution is a quarter of the resolution of the 4K video (the resolution of the 2K video).

  As shown in FIG. 5B, when an operation signal is received from the remote controller 302, the CPU 132 displays the display image G2 on the display image G1 and the resolution of the display image G2 and the reference resolution (or the display image G1). And the size of the resolution). Then, the resolution comparing unit 134 compares the size of the resolution of the display image G2 with the reference resolution (or the size of the resolution of the display image G1), and determines whether the size of the resolution of the display image G2 is smaller than the reference resolution. Is determined. The resolution comparison unit 134 outputs the comparison result to the CPU 132 and / or the decoding control unit 133. In FIG. 5B, since the magnitude of the resolution of the display image G2 is smaller than the reference resolution, the decoding control unit 133 decodes the extended image signal in accordance with the instruction signal of the CPU 132, that is, the decoding process of the second signal processing unit 602. To stop (or skip). The decoding processing unit 221 configures a sub-picture with a reference video signal and a 2K video signal, for example, in accordance with a current broadcast wave decoding process (for example, an MPEG-2 encoded signal decoding process). For example, when the resolution comparing unit 134 determines that the resolution of the display video is smaller than the resolution of the 2K video with respect to the resolution of the 4K video as the reference resolution, the CPU 132 performs 2K image is displayed on the display unit 115 as the sub-image of.

FIG. 6A is a diagram illustrating an example of a case where a thumbnail image is displayed as a display image, and FIG. 6B is a diagram illustrating an example of channel selection of the thumbnail image in the case of FIG. 6A. The reference resolution is the size of the resolution of the 4K video.
In FIG. 6A, a display image G3 is a thumbnail image displayed when the d button B1 provided on the remote controller 302 is pressed. As shown in FIG. 6B, when an operation signal is received from the remote controller 302, the CPU 132 displays the display image G3 and, when displaying the display image G3, the resolution size and the reference resolution (or the resolution of the display image before display switching). Size) and get. Then, the resolution comparing unit 134 compares the size of the resolution of the display image G3 with the reference resolution (or the size of the resolution of the display image before display switching), and determines that the size of the resolution of the display image G3 is less than the reference resolution. Is determined. The resolution comparison unit 134 outputs the comparison result to the CPU 132 and / or the decoding control unit 133. As shown in FIG. 6B, when the resolution of the display video G3 is smaller than the reference resolution, the decoding control unit 133 stops the decoding process of the extended video signal, that is, the decoding process of the second signal processing unit 602 ( Or skip). The decoding processing unit 221 composes a thumbnail video with a reference video signal, for example, a 2K video signal, according to, for example, a current broadcast wave decoding process (for example, an MPEG-2 encoded signal decoding process). For example, when the resolution comparing unit 134 determines that the resolution of the display video is smaller than the resolution of the 2K video with respect to the resolution of the 4K video as the reference resolution, the CPU 132 executes the thumbnail video after the display switching. Is displayed on the display unit 115.

  In addition to these examples, FIG. 7 is a diagram illustrating an example of channel selection when a plurality of screens are displayed, and FIG. 8 is a diagram illustrating an example of channel selection of thumbnail images displayed in a recording list. FIG. 9 is a diagram showing an example of channel selection of a thumbnail video displayed on the editing screen.

  As shown in FIG. 7, when a plurality of screens are displayed, the resolution comparing unit 134 compares each display image (G4, G5) with a reference resolution (or the size of the resolution of the display image before display switching). To determine whether the resolution of the display images G4 and G5 is smaller than the resolution of the reference resolution.

As shown in FIG. 8, even when a thumbnail is displayed in the recording list, as described above,
The resolution comparing unit 134 compares each display image (G6) with the reference resolution (or the resolution of the display image before display switching), and determines that the resolution of the display images G4 and G5 is equal to the reference resolution. It is determined whether the resolution is smaller than the resolution.

  As shown in FIG. 9, even when a plurality of thumbnail images are displayed on the edit screen, as described above, the resolution comparison unit 134 determines whether each of the display images (G7, G8) and the reference resolution (or Of the display images G1 and G2) to determine whether the resolution of the display images G7 and G8 is smaller than the reference resolution.

  7 to 9, when the resolution comparing unit 134 determines that the resolution of the display video is smaller than the resolution of the 2K video with respect to the resolution of the 4K video as the reference resolution Then, the CPU 132 causes the display unit 115 to display a 2K video as a thumbnail video after display switching.

  According to the present embodiment, the receiver 5 stops (or skips) the decoding process of the high-quality video when the CPU 132 receives a request to display a video having a resolution smaller than the reference resolution. For example, when the size of the 4K resolution is set as the reference resolution, the receiver 5 receives a request to display a 2K resolution video, and receives a high-quality video by the extended video signal and the reference video signal, for example, The processing for restoring the 4K video signal is stopped (or skipped). In this case, the receiver 5 outputs a high-quality image, for example, a 4K image, as an image displayed on the entire screen of the display unit 115, and outputs a reference image, for example, a 2K image, as a display image having a resolution lower than the reference resolution. I do. For this reason, in the receiver 5 of the present embodiment, a process of generating a high-quality high-quality video, for example, a 4K video, for a video having a resolution lower than the reference resolution is suppressed. As a result, in the receiver 5, the processing time for the switching display is reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Furthermore, when decoding high-quality video from the extended video signal and the reference video signal, various processes are required, and the load and power consumption required for the process may increase. However, in the receiver 5 of the present embodiment, since the process of generating a high-quality image for an image having a resolution lower than the reference resolution is suppressed, the load and power consumption for these processes are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In this embodiment, the receiver 5 (CPU 132) outputs the reference video signal when the resolution of the display video displayed at the time of display switching is lower than the reference resolution. The display area of the display unit 115 may determine whether to display either the reference image or the high-quality image. For example, when the CPU 132 receives an operation instruction signal requesting display switching from the remote controller 302 and detects that the next display image to be displayed on the display unit 115 is smaller than the display area of the currently displayed display image. Then, a reference image is displayed on the display unit 115 as a display image.

Next, a transmitting / receiving system according to another embodiment will be described. In other embodiments, the same parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
(Second embodiment)
In the second embodiment, the receiver 5 further includes a configuration for detecting zapping when switching the display.

FIG. 12 is a block diagram illustrating an example of the receiver 5 according to the second embodiment.
The system controller 113 further includes a zapping detection unit 135.
The zapping detection unit 135 detects zapping when an operation signal for display switching from the remote controller 302 or the like exceeds a threshold value during a predetermined time interval, and outputs a detection result. Here, zapping refers to frequent switching of channels (contents, programs) using a remote controller or the like when watching television. That is, a state in which an operation of continuously switching channels in a short time or continuously switching contents in a short time is performed is a “zapping state”. The zapping detection unit 135 may be incorporated in the CPU 132 or may be firmware executed by the CPU 132.

FIG. 13 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In the present embodiment, when the receiver 5 is driven, in step S1301, the CPU 132 detects whether or not an extended video signal (extended layer) has been received.
In step S1302, the CPU 132 causes the display unit 115 to display a high-quality image that can be displayed, for example, a 4K image.
In S1303, the CPU 132 receives a signal requesting channel switching. In S1304, the zapping detection unit 135 determines whether a predetermined number of channels have been switched during a predetermined time interval. At this time, the zapping detection unit 135 acquires a time interval and a threshold (the number of times of reference switching) related to zapping from the setting information stored in the nonvolatile memory 127. The zapping detection unit 135 determines that the channel is in the zapping state when the channel switching exceeding the reference switching count is detected during the predetermined time interval.

If the zapping detection unit 135 does not determine that the state is the zapping state (NO in S1304), the process returns to S1302.
If the zapping detecting unit 135 determines that the channel is in the zapping state (YES in S1304), in S1305, the CPU 132 determines the channel of the program that is predicted to be selected next to the channel (program) currently displayed on the display unit 115. (Predicted channel, predicted program). That is, the CPU 132 sets (channel prediction) a channel predicted to be next selected by the user during zapping. Here, the CPU 132 stores information related to the predicted channel in the nonvolatile memory 127, for example.

In S1306, the CPU 132 receives the extended video signal and / or the reference video signal of the program displayed on the channel set as the predicted channel before the program is displayed. Here, the CPU 132 may temporarily hold the previously received extended video signal and / or reference video signal in a buffer or a memory. For example, the CPU 132 may hold the data in the nonvolatile memory 127 and / or the storage unit 129.
In step S1307, the decoding control unit 133 causes the decoding processing unit 221 to start decoding the extended video signal received in advance according to the instruction signal from the CPU 132 before receiving the channel switching instruction signal.

In S1308, the CPU 132 determines whether or not the channel selected and displayed next to the channel displayed on the display screen of the display unit 115 immediately before matches the predicted channel.
If it is determined that the selected channel does not match the predicted channel (NO in S1308), the CPU 132 executes normal channel switching in S1309. Here, the normal channel switching is a channel switching in a state where there is no previously acquired extended video signal. Therefore, in normal channel switching, if the display video after switching is the reference video that is the current program (broadcast content), the CPU 132 switches the channel according to the current broadcast. Further, in the normal channel switching, when the display video after the switching is a high-quality video, for example, a 4K video, the processing time is longer in the decoding process than in the decoding process of the reference video signal. Switch channels, including.

If it is determined that the selected channel does not match the predicted channel (YES in S1308), in S1310, the CPU 132 performs the decoding process prior to the decoding processing unit 221 (for example, the output selector 96). The high-quality image is output to the display unit 115.
In S1310, the CPU 132 causes the display unit 115 to display a high-quality image.
Hereinafter, several examples of setting of the prediction channel in the zapping state of the CPU 132 will be described with reference to the drawings.

  FIGS. 14A and 14B are diagrams illustrating an example of a predicted channel during zapping, and FIGS. 15A and 15B are diagrams illustrating an example of a predicted channel during zapping. In FIGS. 14A and 14B and FIGS. 15A and 15B, B2 includes a button on which a plurality of numbers are described. These buttons are used to switch the program displayed on the display unit 115 to the display image of the program assigned by the setting by pressing the number assigned to the channel of the program by the setting. A button for transmitting a signal. B3 is a button for switching to a channel (up or down channel) adjacent to (adjacent to) a number (transmission line, tuner, or the like) assigned to a channel of a program currently displayed on the display unit 115.

The CPU 132 sets, for example, the channel of the program of the button whose setting position is arranged adjacent to the button of the currently selected program on the remote controller 302 as the predicted channel.
In this case, for example, as illustrated in FIG. 14A, when the button “5” of the button B2 is displayed on the display unit 115, the CPU 132 determines that the “5” adjacent to the button “5” as the predicted channel. The channels assigned to the buttons "2", "4", "6", and "8" are set. Further, as shown in FIG. 14B, the CPU 132 sets “1”, “3”, “7”, and “9”, which are arranged at positions oblique to the “5” button as predicted channels. Set the button.

  For example, when detecting that the button number on the remote control 302 is monotonically increasing or decreasing, the CPU 132 sets the channel of the program assigned to the next button on the remote control 302 as the prediction channel.

  In this case, for example, as illustrated in FIG. 15A, the CPU 132 determines, for example, the “1” button, the “2” button, the “1” button, and the “1” button B2 arranged on the remote control 302. If it is detected that the channel is selected in the order of the button "3" and the description, the button "4" is set as the prediction channel. Further, as shown in FIG. 15B, the CPU 132 selects, for example, the button “2”, the button “5”, and the button “8” in the order of the button B2 arranged on the remote controller 302. When it is detected that the mobile station is operating, the button "11" is set as the predicted channel.

  In FIGS. 14A and 14B and FIGS. 15A and 15B, the channels of all the buttons arranged around “5” may be set as the prediction channels. Also, the combination need not be as shown in the figure. For example, any combination of vertical, horizontal, and diagonally adjacent button channels may be set as the prediction channel.

  For example, when detecting that the channel is selected by the channel selection button B3, the CPU 132 sets the next (up) channel or the previous (down) channel adjacent to the channel of the currently displayed program to the predicted channel. Set as

  When the CPU 132 receives an operation signal requesting channel switching of the remote controller 302, the nonvolatile memory 127 may include a channel prediction list. This prediction list may be set in advance in the receiver 5 as a table or may be set by the user.

  The prediction list may be created by the CPU 132 detecting a channel of a program frequently watched by the user for each use frequency. In this case, the CPU 132 sets some frequently used channels other than the channel of the currently displayed program as predicted channels.

  Further, the prediction list may be obtained from the Internet when the Internet can be connected. In this case, for example, the prediction list is created by data that accumulates what programs are frequently viewed in the residential area, family structure, age, occupation, gender, time zone, and the like.

  In the present embodiment, the receiver 5 includes a zapping detection unit 135. The zapping detecting unit 133 detects that the operation signal for switching the channel from the remote controller 302 or the like has been transmitted a predetermined number of times during a predetermined time interval, and detects that the user is zapping. When zapping is detected, the CPU 132 predicts a channel to be selected next to the currently displayed channel. The CPU 132 acquires an extension layer of the prediction channel in advance. When the selected channel matches the predicted channel, the receiver 5 (CPU 132) can decode the high-quality video immediately from the reference video signal and the extended video signal in the decoding processing unit 221. That is, at the time of channel switching, the receiver 5 can immediately display a high-quality image on the display unit 115. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  Next, a modified example of the receiver according to the second embodiment will be described. In the modified example of the embodiment, the same portions as those of the above-described second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

(Modification 2)
The receiver 5 according to the second modification of the second embodiment can set a plurality of channel switching methods when switching the viewing channel display.

  At the time of channel switching, the CPU 132 of the second modification switches the display video according to a preset channel switching setting (channel switching mode). For example, when receiving an operation signal requesting switching of the viewing channel from the remote controller 302 or the like, the CPU 132 first displays the reference video on the display unit 115, and displays a high-quality video signal after a fixed time (several seconds). At this time, the CPU 132 acquires, for example, channel switching information included in the setting information stored in the nonvolatile memory 127.

The receiver 5 according to the second modification includes, for example, the first mode and the second mode in the setting information as the channel switching information.
In the first mode, when a high-quality image is detected at the time of switching of the viewing channel, the channel after switching (second channel) is used when switching from the image of the currently viewed channel (first channel) before switching. Is displayed, and then a high-quality image is displayed. At this time, the decoding control unit 133 controls the decoding processing unit 221 to output to the video processing unit 114 in the order in which the decoding processing is completed.

  In the second mode, when a high-quality image is detected when the viewing channel is switched, the high-quality image is displayed without displaying the reference image.

  For example, when receiving an operation signal requesting channel switching from the remote controller 302, the CPU 132 displays a 2K video in the first mode, displays a 4K video after a predetermined time, and displays a 4K video in the second mode. . At this time, in the second mode, since the process of decoding the 4K video takes time, a delay occurs between the time when the CPU 132 receives the operation signal for switching the channel and the time when the 4K video is displayed, and the delay is slightly increased. There is a possibility that a still image or the like in which the image is interrupted, a black screen, or the last frame of the previous image is inserted. On the other hand, in the first mode, 2K video is inserted between the time when the CPU 132 receives the operation signal for switching channels and the time when the 4K video is displayed. The CPU 132 causes the display unit 115 to display the 4K video as soon as the decoding process of the 4K video is completed.

  FIG. 16 is a flowchart illustrating the operation of the receiver 5 according to the second modification of the present embodiment. Here, it is assumed that the receiver 5 has the first mode and the second mode in the setting information as the channel switching mode.

In this embodiment, when the receiver 5 is driven, in S1601, the CPU 132 detects whether or not an extended video signal has been received.
In step S1602, the user sets the channel switching mode via the remote controller 302 or the like. Here, the channel switching mode may be set in advance at the manufacturing stage.

In step S1603, the CPU 132 receives an operation signal requesting channel switching from the remote controller 302 or the like, and executes channel switching.
In S1604, the CPU 132 determines whether the channel switching mode is set to the first mode or the second mode.
If the channel switching mode is the first mode (first mode of S1606), in S1605, the decoding control unit 133 controls the decoding processing unit 221 to output the decoding processing unit 221 to the video processing unit 114 in the order in which the decoding processing is completed. .

  In S1606, the decoding processing unit 221 outputs the reference video until the decoding process of the high-quality video is completed according to the instruction signal of the CPU 132 and the decoding control unit 133. For example, the decoding processing unit 221 outputs a 2K video, which is a reference video, until decoding of a 4K video, which is a high-quality video, is completed in accordance with an instruction signal from the CPU 132 and the decoding control unit 133.

  If the channel switching mode is the second mode (second mode of S1606), the process proceeds to S1607.

  In step S1607, when the decoding processing of the high-quality image is completed, the decoding processing unit 221 immediately outputs the high-quality image of the reference image, for example, a 4K image according to the instruction signal of the CPU 132 and the decoding control unit 133.

  Note that this channel switching mode can be applied to the channel switching processing related to zapping of the second embodiment shown in FIG. For example, in the process of S1303, at the time of normal channel switching, the CPU 132 may display the reference video on the display unit 115 until the decoding process of the high-quality video signal is completed. In the process of S1309, during normal channel switching, the CPU 132 may display the reference video on the display unit 115 until the decoding process of the high-quality video signal is completed.

  Hereinafter, some examples of a method of setting the channel switching setting will be described with reference to the drawings. Hereinafter, in the receiver 5 of the modified example 2, an example in which the channel switching setting is set by an operation via a setting screen or the like displayed on the display unit 115 will be described.

FIG. 17 is a diagram illustrating an example of a display switching setting screen.
As illustrated in FIG. 17, the CPU 132 executes the channel switching of the image displayed on the display unit 115 with the display switching setting (first mode or second mode) selected by the user on the selection screen.

FIG. 18 is a diagram illustrating an example of a setting screen on which display switching can be set for each item.
As shown in FIG. 18, the CPU 132 displays an image displayed on the display unit according to items, for example, a channel, a program genre, and a channel switching setting (first mode or second mode) set by a user for each program. Perform display switching.

  According to the second modification of the present embodiment, when the receiver 5 receives an operation signal requesting channel switching for a high-quality video, for example, a 4K video program, the receiver 5 displays the high-quality video according to the channel switching mode. Displayed at 115. When the receiver 5 receives the operation signal requesting the channel switching for the 4K video program, the receiver 5 outputs the 2K video until the 4K video decoding process is completed, and the 4K video decoding process is completed. Soon, the 4K video is displayed on the display unit 115. That is, the receiver 5 does not insert a break in an image, a black screen, a still image displaying the last frame of the previous image, or the like until the 4K video decoding process is completed. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

  In the first mode, the timing of switching the channel between the reference video and the high-quality video is set to be immediately after the decoding process of the high-quality video is completed. Channel switching can also be performed at the moment the scene changes. After the decoding process of the high-quality video is completed, the CPU 132 can execute the channel switching at the set time and time.

(Third embodiment)
In the third embodiment, the receiver 5 has a function for detecting an unused tuner (unused tuner) at the time of display switching, in addition to the configuration and functions of the above-described embodiment. .

FIG. 19 is a block diagram illustrating an example of the receiver 5 according to the third embodiment.
The system controller 113 of the third embodiment further includes a tuner detection unit 136.

Tuner detecting section 136 detects a tuner and information related to the tuner included in input section 111, and outputs a detection result. When the display is switched by an operation instruction from the remote controller 302 or the like, for example, when an operation signal requesting display of a high-quality image is received, the tuner detection unit 136 detects the tuner according to the instruction signal of the CPU 132. Further, the tuner detection unit 136 may always detect the tuner while the receiver 5 is running. At this time, the obtained extended video signal and / or reference video signal may be temporarily stored in a buffer and / or a memory. For example, the extended video signal and / or the reference video signal received by the detected tuner may be stored in the nonvolatile memory 127 and / or the storage unit 129. Note that the tuner detection unit 136 may be incorporated in the CPU 132, or may be firmware executed by the CPU 132.
The decoding control unit 133 controls the decoding process according to the setting of the tuner.

The CPU 132 receives the detection result of the tuner detection unit 136, and can update setting information related to reception to the tuner in the input unit 111.
For example, the input unit 111 includes a tuner set for receiving terrestrial digital, BS broadcast, and CS broadcast. In this case, each of the tuners for receiving the BS broadcast and the CS broadcast receives broadcast waves of the BS broadcast and the CS broadcast, respectively, in a normal state. When receiving the detection result that the tuner for receiving the BS broadcast and the CS broadcast is unused, the CPU 132 updates the reception setting of the tuner so that the tuner for receiving the BS broadcast receives the reference video signal or the extended video signal. (Change). In this case, the receiver 5 may set the tuner with reference to the PMT or the like of the extended video signal. Further, the receiver 5 may set the tuner with reference to the NIT included in signals such as terrestrial digital, BS broadcast, and CS broadcast transmitted as the reference video signal. At this time, the receiver 5 may, for example, connect a descriptor (for example, an EIT (Event Information Table) and a Hyper_Link descriptor, etc.) so as to refer to the NIT included in the extended video signal corresponding to the referenced reference video signal. ) And the NIT of the extended video signal.

FIG. 20 is a flowchart illustrating the operation of the receiver 5 of the present embodiment.
In this embodiment, when the receiver 5 is driven, in S2001, the CPU 132 detects whether or not an extended video signal has been received.
In step S2002, the tuner detection unit 136 detects a tuner and outputs a detection result to the CPU 132.

In S2003, the CPU 132 detects an unused tuner from the detection result of the tuner detection unit 136.
If there is no unused tuner (NO in S2003), the process returns to S2002.
If there is an unused tuner (YES in S2003), in S2004, the CPU 132 causes the unused tuner ( First unused tuner) is set.

  In S2005, the tuner detection unit 136 detects a tuner and outputs a detection result to the CPU 132.

In S2006, the CPU 132 receives the detection result of the tuner detection unit 136, and determines whether there is an unused tuner.
If there is no unused tuner (NO in S2006), the process returns to S2005.
If there is an unused tuner (YES in S2006), in S2007, the CPU 132 causes the unused tuner (the second tuner (not shown) to receive an extended video signal of another channel different from the channel currently viewed (displayed) on the display unit 115. 2 unused tuners). For example, when an operation signal requesting channel switching is received, if the extended video signal of the channel after switching has already been acquired, the CPU 132 can quickly decode the high-quality video and display it on the display unit 115. .

  In step S2008, the decoding control unit 133 controls the decoding processing unit 221 to decode the extended video signal corresponding to the acquired program that is currently being viewed.

In step S2009, the CPU 132 receives an operation signal requesting channel switching from the remote controller 302 or the like, and executes display switching.
In step S2011, the CPU 132 causes the decoding processing unit 221 to output a video according to the operation signal. When a program including high-quality video decoded from the acquired extended video signal is selected, the decoding processing unit 221 can quickly output the high-quality video.

  According to the present embodiment, the receiver 5 includes the tuner detection unit 136 that detects an unused tuner. The CPU 132 receives the detection result of the tuner detection unit 136, and can acquire the extended video signal in advance with an unused tuner. The decoding processing unit 221 can decode the high-quality video in advance according to the instruction signal of the decoding control unit 133. As a result, at the time of display switching, the receiver 5 can reduce the delay time that occurs until the decoding processing of the 4K video is completed. A high-quality image can be displayed on the display unit 115 without inserting a still image or the like displaying a frame. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

(Fourth embodiment)
In the fourth embodiment, in addition to the configuration and functions of the above-described embodiment, the receiver 5 is further provided with a configuration capable of setting display of a high-quality image when switching the display.

FIG. 21 is a block diagram illustrating an example of the receiver 5 according to the fourth embodiment.
The receiver 5 according to the fourth embodiment further includes a program information detection unit 137. Further, the receiver 5 of the present embodiment includes information (display setting information) indicating whether or not display of a high-quality image is permitted. That is, the display setting information indicates whether to display the reference image or the high-quality image. For example, the display setting information is provided in the nonvolatile memory 127 and / or the storage unit 129.

The program information detection unit 137 detects information related to the program, determines whether display permission is set for the display image displayed on the basis of the display setting information and the high-quality image, and outputs information of the determination result. . The program information detection unit 137 acquires, for example, the channel, type (genre), program information, program content, broadcast time, and the like of the program. For example, the program information detection unit 137 can read an EIT (Event Information Table) from a stream (signal). The display setting information may be set in advance, or may be set by a user via a display screen. The program information detection unit 137 may be incorporated in the CPU 132, or may be firmware executed by the CPU 132.
Hereinafter, some examples related to the display setting of a high-quality image in the receiver 5 of the present embodiment will be described with reference to the drawings. FIGS. 22, 23 (a) and 23 (b), and FIGS. 24 (a) and 24 (b) are examples of the display setting screen for high-quality video of the present embodiment.
For example, as shown in FIG. 22, the user can set display of high-quality video for each channel, genre, and program on a screen displayed on the display unit 115 via the remote controller 302 or the like. In FIG. 22, when “ON” is set, the CPU 132 displays a high-quality image on the display unit 115. In the case of “OFF” in FIG. 22, the CPU 132 causes the display unit 115 to display the reference image without displaying the high-quality image.

  In addition, as shown in FIG. 23A, when setting for each genre, it is possible to set whether or not to display a high-quality image as a genre, and it is also possible to make more detailed settings. For example, as shown in FIG. 23A, the display of high-quality video is set to “ON” for sports such as tennis, soccer, and baseball. In this case, as shown in FIG. 21B, the landscape image G9 is displayed as a reference image, for example, a 2K image, whereas the tennis image G10 is displayed as a high-quality image, for example, a 4K image. .

  As shown in FIG. 24A, by setting a term, the CPU 132 automatically determines whether to display a high-quality image when the set term is included in the program information. For example, as shown in FIG. 24A, when the user adds terms such as “superb view” and “beautiful” to the display setting information, the CPU 132 checks the term set in the program information to display the program. The image is displayed on the display unit 115 as a high-quality image. In the case as shown in FIG. 22 (b), the program “□ △△” and the program “れ る □” in which the program information includes “superb view” and “beautiful” are displayed in high-quality video. In such a case, the decoding control unit 133 controls the decoding processing unit 221 so as to obtain in advance the extended video signal of the program including the set term in the program information.

FIG. 25 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In the present embodiment, when the receiver 5 is driven, in S2501, the CPU 132 detects whether or not an extended video signal has been received.
In S2502, the user sets display settings for high-quality video via the remote controller 302 or the like. Note that the display setting of the high-quality video may be set in advance at the manufacturing stage.
In S2503, the CPU 132 receives an operation signal requesting display switching from the remote controller 302 or the like, and executes display switching.
In S2504, the CPU 132 determines whether or not there is an extended video signal of the video to be displayed after the display is switched.

  If it is determined that there is no extended video signal (NO in S2504), the process returns to S2503.

  If it is determined that the extended video signal is present (YES in S2504), in S2505, the program information detection unit 137 detects the program information of the display video to be displayed after the display is switched according to the instruction signal of the CPU 132. Here, the program information includes, for example, a channel, a broadcast time of the program, a broadcast area, a program (content), and a type (genre) of the program.

  In S2506, the program information detection unit 137 detects display setting information. Here, for example, the program information detection unit 137 detects the display setting information from the nonvolatile memory 127.

  In step S2507, the program information detection unit 137 determines whether display permission for a high-quality image is set for the display image displayed based on the program information and the display setting information.

  When it is determined that display permission for high-quality video is set (YES in S2507), in S2508, the CPU 132 causes the decoding processing unit 221 to output.

When it is determined that the display permission for the high-quality video is not set (NO in S2507), the decoding control unit 133 stops or skips the decoding process of the extended video signal in accordance with the instruction signal of the CPU 132 in S2509. Therefore, the decoding processing unit 221 decodes and outputs only the reference video signal.
In S2510, the CPU 132 causes the display screen of the display unit 115 to display the reference image as the display image.

  According to the present embodiment, the receiver 5 includes the information of the display setting of the high-quality video in the nonvolatile memory 127. In accordance with the display settings, the CPU 132 determines whether or not display permission for high-quality video is set for each channel, program, and type (genre) of the program. The receiver 5 stops (or skips) the decoding process of the high-quality image when the display image to be displayed next is not set to permit display of the high-quality image in the display setting, and displays the reference image on the display unit. Displayed at 115. Therefore, the receiver 5 of the present embodiment can efficiently execute the decoding process of the high-quality video by setting the display settings.

  In the present embodiment, if a signal (third video signal) constituting a high-quality image can be received not by two transmission paths but by one transmission path, the receiver 5 operates in accordance with display permission information and the like. Receive high quality video. For example, when 4K video is being broadcast in CS broadcasting or the like, the receiver 5 includes at least one dedicated tuner (high-performance tuner) capable of receiving a signal (third video signal) constituting the 4K video. And receives 4K video via this dedicated tuner regardless of display setting information. Here, the receiver 5 is a television receiver or the like that supports both 4K broadcasting and scalable broadcasting.

(Fifth embodiment)
In the fifth embodiment, the receiver 5 further includes a sensor 401 in addition to the configuration and functions of the above-described embodiment.

FIG. 26 is a block diagram illustrating an example of the receiver 5 according to the fifth embodiment.
The receiver 5 according to the fifth embodiment further includes a sensor 401.
The sensor 401 detects a person (viewer) watching the receiver 5 and a state of the viewer, and outputs a detection result. The sensor 401 is various sensors, and includes, for example, an optical sensor, a human sensor, a temperature sensor, an optical sensor, an acceleration sensor, and the like.
The decoding control unit 133 controls the decoding processing unit 221 according to the detection result of the sensor 401. For example, when the sensor 401 cannot detect a viewer for a predetermined time (detection time) for a predetermined time or more, the decoding control unit 133 stops or skips the decoding processing of the extended video signal according to the instruction signal of the CPU 132. The detection time may be arbitrarily set by the user, or may be set at the manufacturing stage. In addition, the setting information of the nonvolatile memory 127 may include information on the detection time.

FIG. 27 is a flowchart showing the operation of the receiver 5 of the present embodiment.
In this embodiment, when the receiver 5 is driven, in S2701, the CPU 132 detects whether or not an extended video signal has been received.
In S2702, the CPU 132 displays the high-quality video on the display unit 115.
In S2703, the sensor 401 detects whether there is a viewer.

If it is determined that there is a viewer (YES in S2703), the process proceeds to S2702.
If it is determined that there is no viewer (NO in S2703), in S2704, the decoding control unit 133 stops or skips the decoding process of the extended video signal according to the instruction signal of the CPU 132. Therefore, the decoding processing unit 221 decodes and outputs only the reference video signal.
In step S2705, the CPU 132 causes the display screen of the display unit 115 to display the reference image as a display image.
In step S2706, the sensor 401 detects whether there is a viewer again.

If it is determined that there is no viewer (NO in S2706), the process proceeds to S2705.
If it is determined that there is a viewer (YES in S2706), in S2707, the decoding control unit 133 controls to start decoding the extended video signal in accordance with the instruction signal from the CPU 132.
In S2708, the CPU 132 causes the display screen of the display unit 115 to display a high-quality image as a display image.

  According to the present embodiment, the receiver 5 can detect the presence or absence of a viewer with the sensor 401. When there is no viewer, the CPU 132 stops (or skips) the decoding process of the high-quality video, and displays the reference video on the display unit 115. Therefore, the receiver 5 of the present embodiment can efficiently execute the decoding process of the high-quality video by setting the display settings.

According to the above-described embodiment, the processing time of the display switching in the receiver 5 is reduced.
Further, the receiver 5 can stop the decoding process of the high-quality video according to the state of the display switching. As a result, in the receiver 5, the load and the power consumption for decoding the high-quality video are reduced. Therefore, the receiver 5 can efficiently provide a high-quality video composed of the reference video signal and the extended video signal.

In the above-described embodiment, the reference video signal and the extension video signal are respectively transmitted on transmission paths that transmit different broadcast waves, but may be transmitted on the Internet as transmission paths. For example, as shown in FIG. 28, the transmission / reception system 1 includes a transmitter (transmission device) 3, a receiver (reception device) 5, and a server 7. In the transmission / reception system 1, the transmitter 3, the receiver 5, and the server 7 are connected by wired and / or wireless broadcast and communication transmission paths, respectively. In the transmission / reception system 1, the transmitter 3 distributes the program content using, for example, a broadcast wave as a medium. The server 7 distributes the program content via the Internet line. The transmission / reception system 1 includes transmission paths 801, 802, and 803. In the transmission / reception system 1, the transmitter 3 can transmit the reference video signal and the extended video signal via the transmission path 801 and the transmission path via the transmission path 802 and the transmission path 803 via the server 7. . In this case, the CPU 132 performs display switching as described in the above-described embodiment. For example, as shown in FIG. 29, when displaying a video obtained via the Internet line on the display unit 115, if the display video G11 is lower than the reference resolution, the CPU 132 stops the decoding process of the high-quality video ( Or skip) to display the reference image.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Transmission / reception system, 3 ... Transmitter (transmission apparatus), 4 ... Transmission signal processing apparatus, 5 ... Receiver (reception apparatus), 7 ... Server, 10, 16, 22, 40, 60, 80 ... Input terminal, 58 97, an output terminal, 64, a first multiplexing / demultiplexing unit, 66, a first descrambler, 68, a decoder, 70, a first ECM / EMM processing unit, 72, a clock reproduction control unit, 74, an upconverter 76, a buffer, 78, an SHVC decoder, 84, a second demultiplexing unit, 86, a second ECM / EMM processing unit, 88, a second descrambler, 90, a PSI / SI processing unit, 92, Metadata processing unit, 94: high image quality processing unit, 104: antenna unit, 105: external input terminal, 111: input unit, 112: signal processing unit, 113: system controller (system control unit), 114: video processing Unit, 115 display unit, 116 audio processing unit, 117 audio output unit, 119 operating unit, 120 receiving unit, 121 communication interface, 122 network control unit, 123 USB interface, 124 HDMI, 125 .., Storage unit, 211, decoding processing unit, 501, first signal generation unit, 502, second signal generation unit, 601, first signal processing unit, 602, second signal processing unit, 801, first , Transmission line 802: second transmission line, 803: third transmission line

Claims (4)

A receiving unit that includes at least one tuner and receives a first video signal and a second video signal used to improve the image quality of the first video signal;
Decoding the first video signal to generate a first video having a first resolution;
Decoding the second video signal and the second video signal to generate a second video having a second resolution higher in quality than the first video having the first resolution, and Or a decoding unit that outputs one of the second videos;
When the receiving unit receives the second video signal, the second video signal generated by the decoding unit;
A detection unit for detecting a program name of a program in the video of
The user can set a term in advance, and when the size of the resolution of the area where the first video or the second video is displayed is larger than a threshold, the detected program name and the preset term are used. It is determined whether to display the second video or the first video in the area based on the above and either one is displayed, and the first video or the second video is displayed When the size of the resolution of the region is equal to or less than a threshold value, a control unit that displays the first image in the region,
Electronic equipment provided with. If there is an unused tuner that has not received a video signal corresponding to the currently selected channel, the unused tuner may be the first video signal or the first video signal corresponding to a channel other than the currently selected channel. The electronic device according to claim 1, wherein the electronic device receives at least one of the second video signals. Using at least one tuner, receiving a first video signal and a second video signal used to enhance the quality of the first video signal;
Decoding the first video signal to generate a first video of a first resolution, and decoding the first video signal and the second video signal to generate the first video of the first resolution; A second video having a second resolution higher in quality than the first video can be generated, and the first video or the second video can be generated.
Output one of the images
Detecting the program name of the program in the second video when receiving the second video signal;
The user sets the term in advance,
When the size of the resolution of the area where the first video or the second video is displayed is larger than a threshold value, the second area is displayed in the area based on the detected program name and the preset term . It is determined whether to display the image of the first or the first image, and any of them is displayed,
A display method for displaying the first video in the area when the resolution of the area where the first video or the second video is displayed is equal to or less than a threshold value. If there is an unused tuner that has not received a video signal corresponding to the currently selected channel, the unused tuner may be the first video signal or the first video signal corresponding to a channel other than the currently selected channel. 4. The display method according to claim 3, wherein at least one of the second video signals is received.

Images