JP2011077930A - Moving image processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moving image processing apparatus for optimally processing video by incorporating an image quality improving process in accordance with a calculation processing volume of a video signal and a use condition. <P>SOLUTION: The moving image processing apparatus includes: a decoding means for decoding a video signal to a video frame; a noise removal means for removing noise from the video frame; a size change means for changing the size of the video frame; an image quality conversion means for converting the video frame to a video format for being output to a display means by first image quality conversion or second image quality conversion of high image quality relative to that of the first image quality conversion; and a control means for changing over at least one of turning on/off of the noise removal means, expansion/equal magnification/reduction by the size change means, and the first image quality conversion/the second image quality conversion by the image quality conversion means in accordance with the type of the video signal and a display condition of the video frame in the display means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a video processing technique in a moving image processing apparatus that performs video processing according to display conditions of a video signal.

  As is well known, in recent years, digitalization of television broadcasting has been promoted. For example, in Japan, not only satellite digital broadcasting such as BS (broadcasting satellite) digital broadcasting and 110-degree CS (communication satellite) digital broadcasting but also terrestrial digital broadcasting has been started. Against this background, digital television broadcast receivers are becoming more sophisticated and multifunctional.

  Furthermore, the digital television broadcast receiver is provided with a plurality of various terminals. The digital television broadcast receiver can be connected to an external device or a network via various terminals. A digital television broadcast receiver is a video signal acquired by selecting a broadcast signal, a video signal stored in a built-in storage device or an external storage device, or an IPTV (Internet Protocol Television) video signals, Internet video signals, etc. can be displayed on the video display.

  Digital television broadcast receivers perform different video processing depending on the type of video signal so as to be in a format required by the video display.

  Patent Document 1 discloses a configuration of a video playback apparatus that applies super-resolution processing to all frames during normal playback and does not apply super-resolution processing during fast-forward playback or rewind playback.

JP 2009-88665 A

  However, the configuration of Patent Document 1 uniquely determines on / off of the super-resolution processing according to the playback mode. Therefore, when a block other than the block that performs super-resolution processing on a frame is provided in the video reproduction device, the amount of calculation processing becomes excessive, and a malfunction occurs in the operation of the video reproduction device.

  An object of the present invention is to provide a moving image processing apparatus that incorporates an image quality enhancement process in accordance with the amount of calculation processing and usage in a video signal and optimally processes the video.

  The moving image processing apparatus according to the present invention includes a decoding unit that decodes a video signal into a video frame, a noise removing unit that removes noise from the video frame, a size changing unit that resizes the video frame, Image quality conversion means for converting the video frame into a video format for output to the display means by image quality conversion or second image quality conversion having a higher image quality than the first image quality conversion, the type of the video signal and the display means On / off of the noise removing unit, enlargement / same size / reduction by the size changing unit, and the first image quality conversion / second image quality conversion by the image quality conversion unit Control means for switching at least one of the above.

  According to the above-described invention, it is possible to provide a moving image processing apparatus that incorporates image quality enhancement processing in accordance with the amount of calculation processing and usage in a video signal and optimally processes the video.

The block diagram which shows schematic structure of the digital television broadcast receiver which concerns on this embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on this embodiment. 1 is a block diagram showing a schematic configuration of a signal processing module according to a first embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 2nd Embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 3rd Embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 4th Embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on this embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 5th Embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 6th Embodiment. The block diagram which shows schematic structure of the signal processing module which concerns on 7th Embodiment.

  Hereinafter, this embodiment will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a digital television broadcast receiving apparatus 1 (moving image processing apparatus) according to the present embodiment. That is, the satellite digital television broadcast signal received by the BS / CS digital broadcast receiving antenna is supplied to the satellite digital broadcast tuner 12 via the input terminal 11. The satellite digital broadcast tuner 12 selects a broadcast signal of a desired channel.

  The broadcast signal selected by the satellite digital broadcast tuner 12 is supplied to a PSK (phase shift keying) demodulation module 13, demodulated into a digital video signal and audio signal, and then output to the signal processing module 14. The

  The terrestrial digital television broadcast signal received by the antenna 15 for receiving terrestrial broadcasts is supplied to the first terrestrial digital broadcast tuner 19 via the input terminal 16. The first terrestrial digital broadcast tuner 19 switches and selects a broadcast signal of a channel desired by the user. The broadcast signal selected by the first digital terrestrial broadcast tuner 19 is supplied to an OFDM (orthogonal frequency division multiplexing) demodulation module 20 and demodulated into a digital video signal and audio signal, and then the signal processing module 14. Is output.

  A set of second terrestrial digital broadcast tuner 21 and OFDM demodulation module 22, a set of third terrestrial digital broadcast tuner 23 and OFDM demodulation module 24, a set of fourth terrestrial digital broadcast tuner 25 and OFDM demodulation module 26, a fifth Terrestrial digital broadcast tuner 27 and OFDM demodulator module 28, sixth terrestrial digital broadcast tuner 29 and OFDM demodulator module 30, seventh terrestrial digital broadcast tuner 31 and OFDM demodulator module 32, eighth terrestrial The same applies to the set of the digital broadcast tuner 33 and the OFDM demodulation module 34.

  In the present embodiment, the case where the digital television broadcast receiving apparatus 1 includes eight terrestrial digital broadcast tuners will be described. However, the configuration may include seven or less or nine or more.

  The signal processing module 14 includes a PSK demodulation module 13, an OFDM demodulation module 18, an OFDM demodulation module 20, an OFDM demodulation module 22, an OFDM demodulation module 24, an OFDM demodulation module 26, an OFDM demodulation module 28, an OFDM demodulation module 30, and an OFDM demodulation module. 32, digital video signals and audio signals respectively supplied from the OFDM demodulation module 34 are selectively subjected to predetermined digital signal processing and output to the graphic processing module 36 and the audio processing module 39.

  The signal processing module 14 is connected to a plurality (four in the illustrated case) of input terminals 35a, 35b, 35c, and 35d. These input terminals 35a to 35d are capable of inputting analog video signals and audio signals from the outside of the digital television broadcast receiving apparatus 1, respectively.

  This signal processing module 14 selectively digitizes analog video signals and audio signals respectively supplied from the input terminals 35a to 35d, and performs predetermined digital signal processing on the digitized video signals and audio signals. Are applied to the graphic processing module 36 and the audio processing module 39.

  Of these, the graphic processing module 36 has a function of superimposing and outputting the OSD signal generated by the OSD (on screen display) signal generation module 37 on the digital video signal supplied from the signal processing module 14. The graphic processing module 36 selectively outputs the output video signal of the signal processing module 14 and the output OSD signal of the OSD signal generation module 37, and combines both outputs so as to constitute half of the screen. Can be output.

  The digital video signal output from the graphic processing module 36 is supplied to the video processing module 38. The video signal processed by the video processing module 38 is supplied to the video display 61 and also to the output terminal 41. The video display 61 displays video based on the video signal. When an external device is connected to the output terminal 41, the video signal supplied to the output terminal 41 is input to the external device.

  The audio processing module 39 converts the input digital audio signal into an analog audio signal in a format reproducible by the speaker 62, and then outputs the analog audio signal to the speaker 62 for audio reproduction, and also provides an output terminal 40. Through the outside.

  Here, in the digital television receiver 1, all operations including the above-described various reception operations are comprehensively controlled by the control module 42. The control module 42 includes a CPU (central processing unit) and the like, and receives operation information from the operation module 63 or operation information sent from the remote controller 10 and received via the light receiving module 65. Each module is controlled so that the operation content is reflected.

  The control module 42 mainly includes a ROM (read only memory) 43 that stores a control program executed by the CPU, a RAM (random access memory) 44 that provides a work area to the CPU, and various setting information and control information. Etc. are used.

  A built-in HDD (hard disk drive) 46 is connected to the signal processing module 14. The built-in HDD 46 simultaneously stores, for example, a video signal and an audio signal of a broadcast signal selected by each of the second terrestrial digital broadcast tuner 21 to the eighth terrestrial digital broadcast tuner 33. In the present embodiment, the case where the digital television broadcast receiving apparatus 1 includes one built-in HDD will be described, but a configuration including two or more built-in HDDs may be employed.

  In this embodiment, the viewing terrestrial digital broadcast tuner 17 selects a broadcast signal by switching to a corresponding channel when the user selects a channel to be viewed using the remote controller 10. The video display 61 displays the video of the program based on the broadcast signal.

  Each of the second terrestrial digital broadcast tuner 21 to the eighth terrestrial digital broadcast tuner 33 is set to always select the broadcast signal of the service ID (channel) corresponding to the channel designated by the user using the remote controller 10. Has been. Each of the second terrestrial digital broadcast tuner 21 to the eighth terrestrial digital broadcast tuner 33 is mainly used as a recording tuner.

  The control module 42 is connected to a card holder 48 into which a memory card 66 can be mounted via a card I / F (Interface) 47. As a result, the control module 42 can perform information transmission via the memory card 66 attached to the card holder 48 and the card I / F 47.

  The control module 42 is connected to a LAN (local area network) terminal 67 via a communication I / F 49. As a result, the control module 42 can transmit information from the network such as the Internet via the communication I / F 49.

  The control module 42 is connected to the USB terminal 68 via a USB (universal serial bus) I / F 50. As a result, the control module 42 can perform information transmission with each device connected to the USB terminal 68 via the USB I / F 50.

  Further, the control module 42 is connected to the HDMI terminal 69 via a high definition multimedia interface (HDMI) I / F 51. As a result, the control module 42 can perform information transmission with each device connected to the HDMI terminal 69 via the HDMI I / F 51.

  Next, signal processing for a video signal corresponding to the digital broadcast standard in the signal processing module 14 will be described from the first embodiment to the fourth embodiment.

  FIG. 2 is a block diagram showing a schematic configuration of the signal processing module 14 according to the first to fourth embodiments. The signal processing module 14 includes a DEMUX (demultiplexer demultiplexer) 14a, a video decoder 14b, an audio decoder 14c, a noise removal module 14d, a MUX (multiplexer multiplexer) 14e, a scaler 14f, and an image quality conversion module 14g.

  The DEMUX 14a is a functional block that separates the video signal and audio signal TS (transport stream) packets input to the signal processing module 14 into a video ES (elementary stream) and audio ES corresponding to the digital broadcasting standard, and decrypts them. It is. The video decoder 14b is a functional block that decodes video ES packets into YUV420 format video frames. The audio decoder 14c is a functional block that decodes the audio ES into an audio frame.

  The noise removal module 14d is a functional block that removes image noise existing in a video frame. The noise removal module 14d has a high image quality processing function for video frames. The control module 42 switches on / off of the noise removal module 14d. The MUX 14e is a functional block that synchronizes the video frame and the audio frame and delivers them to the subsequent stage. The scaler 14 f is a functional block that reduces (downscale), equals, and enlarges (upscales) a video frame in accordance with the size of the video display 61. The control module 42 switches reduction, equal magnification, and enlargement processing for the video frame in the scaler 14f. The image quality conversion module 14g is a functional block that converts the format of a video frame to a video format required by the video display 61. The image quality conversion module 14g outputs the format-converted video frame to the subsequent stage.

  The image quality conversion module 14g performs arithmetic processing on the video frame by either high image quality YUV420-422 conversion or normal YUV420-422 conversion. The image quality conversion module 14g has a high image quality processing function for video frames. The control module 42 switches between high image quality YUV420-422 conversion and normal YUV420-422 conversion for the video frame in the image quality conversion module 14g.

  Usually, the YUV420-422 conversion uses a conversion method (for example, linear interpolation) in which the improvement in image quality is poor compared to the high image quality YUV420-422 conversion. When the image quality conversion module 14g performs high-quality YUV420-422 conversion, which is image quality improvement processing, on the video frame, the control module 42 performs image quality improvement processing as compared with the case where the video frame is converted to normal image quality YUV420-422. A beautiful moving image can be displayed on the video display 61. The amount of calculation processing when the image quality conversion module 14g performs high-quality YUV420-422 conversion to a video format is larger than the amount of calculation processing when normal YUV420-422 conversion is performed. That is, the calculation processing load is heavy.

  FIG. 3 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the first embodiment. In the first embodiment, a moving image based on a video signal input to the signal processing module 14 is reproduced and displayed on the video display 61 at full screen and at an equal speed.

  Moving images stored in an external device such as a DVD played by a user using an HDD connected to the built-in HDD 46 or the USB terminal 67 or a DVD (digital versatile disc) player connected to the HDMI terminal 69 using the remote controller 10, for example. This is a case where reproduction of a moving image based on a video signal such as an image or stored data is input. The control module 42 controls the signal processing module 14 as follows.

  The control module 42 validates the noise removal processing by the noise removal module 14d for the video frame. Therefore, the noise removal module 14d performs noise removal processing on the video frame. Since the video size of the video signal input to the signal processing module 14 is the same as the display video size of the video frame displayed on the video display 61 (that is, the entire screen), the control module 42 uses the scaler 14f for the video frame. Switch to double processing. Further, the control module 42 validates the high image quality YUV 420-422 conversion by the image quality conversion module 14g for the video frame. That is, the image quality conversion module 14g performs high image quality YUV420-422 conversion on the video frame.

  As described above, in the first embodiment, the control module 42 is set to enable the noise removal processing by the noise removal module 14d and to enable the high image quality YUV420-422 conversion by the image quality conversion module 14g. The reason for this is that the control module 42 performs normal display of moving images on the video display 61, that is, display control of moving images on the entire screen, so that high-quality display control (higher quality of moving images) is performed. This is necessary. Since the control module 42 has a small calculation processing load due to blocks other than the signal processing module 13, the control module 42 can distribute the calculation processing load to the noise removal module 14d and the image quality conversion module 14g.

  FIG. 4 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the second embodiment. In the second embodiment, a moving image based on a video signal input to the signal processing module 14 is displayed on the entire screen of the video display 61, and the display is controlled by special playback or stop other than the normal speed.

  A user uses, for example, the remote controller 10 to store a moving image, stored data, or the like stored in an external device such as an HDD connected to the built-in HDD 46 or the USB terminal 68, a DVD played on a DVD player connected to the HDMI terminal 69, etc. This is a case where playback at a higher or lower speed than the normal playback speed is input and stop of playback is input. The control module 42 controls the signal processing module 14 as follows.

  The control module 42 invalidates the noise removal processing by the noise removal module 14d for the video frame. Therefore, the noise removal module 14d does not perform noise removal processing on the video frame. The control module 42 switches the video frame so that the scaler 14f performs the same magnification process. Further, the control module 42 enables normal YUV420-422 conversion (high-quality YUV420-422 conversion disabled) by the image quality conversion module 14g for the video frame. That is, the image quality conversion module 14g performs normal YUV420-422 conversion on the video frame.

  As described above, in the second embodiment, the control module 42 sets the noise removal processing by the noise removal module 14d to be invalid and the high image quality YUV420-422 conversion by the image quality conversion module 14g to be invalid. The reason for this is that the control module 42 does not control display and playback of a normal moving image on the entire screen with respect to the video display 61, but controls display of the moving image with special playback or stop. This is because it is not necessary to improve image quality.

  The control module 42 can reduce the calculation processing load caused by the noise removal module 14d and the image quality conversion module 14g as compared to the case of the first embodiment. The control module 42 can distribute the processing load necessary for special playback or stop operation of moving images to blocks other than the signal processing module 13.

  FIG. 5 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the third embodiment. The third embodiment is a case where the video size of the video signal input to the signal processing module 14 is smaller than the display video size of the moving image displayed on the video display 61 (that is, smaller than the full screen). . Further, in the third embodiment, the signal processing module 14 performs signal processing on all video frames based on broadcast signals simultaneously selected by the first terrestrial digital broadcast tuner 19 through the eighth terrestrial digital tuner 33. .

  Here, the video size of the video frame based on the broadcast signal of terrestrial digital broadcasting is 1440 pixels wide. The display video size of the full HD video display 61 is 1920 pixels wide. Therefore, the control module 42 switches the video frame based on the broadcast signal selected by the first digital terrestrial broadcast tuner 19 to be enlarged by the scaler 14f. The scaler 14 f enlarges the horizontal 1440 pixels to the horizontal 1920 pixels in order to adjust the horizontal width of the video frame to the video display 61. The control module 42 invalidates the noise removal processing by the noise removal module 14d for the video frame and validates normal YUV420-422 conversion by the image quality conversion module 14g.

  Similarly, the control module 42 enables the scaler 14f to perform the enlargement process on the video frame based on the broadcast signal selected by the second terrestrial digital broadcast tuner 21, and the noise by the noise removal module 14d on the video frame. The removal process is invalidated, and normal YUV420-422 conversion by the image quality conversion module 14g is validated. The same applies to video frames based on broadcast signals selected by the third terrestrial digital broadcast tuner 23 to the eighth terrestrial digital broadcast tuner 33.

  As described above, in the third embodiment, the control module 42 sets the noise removal processing by the noise removal module 14d to be invalid, and sets the high image quality YUV420-422 conversion by the image quality conversion module 14g to be invalid. The processing load on the frame is reduced. The reason is that FIG. 5 shows a signal processing path for one video frame, but the signal processing module 14 performs signal processing for eight video frames. That is, the signal processing module 14 requires an arithmetic processing amount that is eight times the arithmetic processing amount for one video frame.

  The signal processing module 14 makes effective the noise removal processing by the noise removal module 14d as in the first embodiment for all the video frames of the eight channels of terrestrial digital broadcasting, and the high-quality YUV420-422 conversion by the image quality conversion module 14g. This is because if it is valid, the calculation processing amount in blocks other than the signal processing module 14 is insufficient.

  According to the third embodiment, the signal processing module 14 can perform signal processing simultaneously on all the video frames of the eight channels of digital terrestrial broadcasting. For this reason, the control module 42 is in a state in which the video display 61 can always display and control the moving images of the eight channels. When the user uses the remote controller 10 to switch channels, the control module 42 does not require time for channel selection and signal processing by the terrestrial digital broadcast tuner as in the past. Therefore, the control module 42 can display the moving image of the selected channel at high speed without delaying the video display 61.

  Further, when only the first terrestrial digital broadcast tuner 19 is activated, the signal processing module 14 adds to the video frame based on the broadcast signal selected by the first terrestrial digital broadcast tuner 19 in addition to the enlargement process by the scaler 14f. As in the first embodiment, noise removal processing by the noise removal module 14d and high image quality YUV420-422 conversion processing by the image quality conversion module 14g may be performed.

  FIG. 6 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the fourth embodiment. In the fourth embodiment, the display area of the video display 61 is divided into a plurality of moving images based on broadcast signals simultaneously selected by the signal processing module 14 from each of the first terrestrial digital broadcast tuner 19 to the eighth terrestrial digital. In this case, display control is performed.

  The signal processing module 14, as described in the third embodiment, the number of channels n based on broadcast signals of different channels selected by any one or all of the first terrestrial digital broadcast tuner 19 to the terrestrial digital broadcast tuner 33. Signal processing is performed simultaneously on all the video frames. The maximum number n of channels in the fourth embodiment is eight, which is the number of digital broadcast tuners.

  Further, the control module 41 divides the display area of the video display 14 and simultaneously controls display of video frames having the number of channels n. Therefore, for example, the video size of the video signal of channel 1 input to the signal processing module 14 is larger than the display video size of the moving image displayed in the display area of channel 1 of the video display 61.

  Therefore, the control module 42 switches the video frame based on the broadcast signal of channel 1 selected by the first digital terrestrial broadcast tuner 19 to be reduced by the scaler 14f. The scaler 14 f reduces the image size of the image frame according to the display area of the channel 1 in the image display 61. As in the third embodiment, the control module 42 disables the noise removal processing by the noise removal module 14d to reduce the processing load on the video frame of one channel, and performs normal YUV420- Enable 422 conversion.

  The signal processing module 14 also performs signal processing on video frames based on channel 2 broadcast signals,..., And video frames based on channel n broadcast signals.

  As described above, in the fourth embodiment, the control module 42 sets the noise removal processing by the noise removal module 14d to be invalid and sets the high-quality YUV420-422 conversion by the image quality conversion module 14g to be invalid. The processing load on the frame is reduced. Therefore, the signal processing module 14 can perform signal processing simultaneously on all the video frames having the number n of channels. The control module 42 can control the display of the moving images having the number n of channels on the video display 61.

  Next, the fifth embodiment to the seventh embodiment of the signal processing for the video signal acquired via the network such as the Internet in the signal processing module 14 will be described.

  FIG. 7 is a block diagram showing a schematic configuration of the signal processing module 14 according to the fifth to seventh embodiments. The signal processing module 14 includes a flash player 14h, a video decoder 14i, a noise removal module 14j, a frame conversion module 14k, a noise removal module 141, and an image quality conversion module 14m.

  The flash player 14h is a functional block that allows a moving image based on a video signal acquired via a network to be played back on a browser. The signal processing module 14 may execute the function of the flash player 14h with plug-in software. The video decoder 14b is a functional block that decodes a video signal into a video frame. If the video signal is in the MPEG2 format, the video decoder 14b decodes the video signal into an MPEG2 format video frame. Similarly, the video decoder 14b receives the video signal H.264. H.264 format is an H.264 format. Decode into H.264 format video frames. The noise removal module 14j is the same as the noise removal module 14d in FIG. The control module 42 switches on / off of the noise removal module 14j.

  The frame processing module 14k is a functional block that performs image frame enlargement processing and image quality processing. The image quality conversion module 14g performs arithmetic processing on the video frame by either CC (cubic conbolution method) enlargement processing + high image quality processing or CC enlargement processing. When the image quality conversion module 14g performs the image quality enhancement process on the video frame, the control module 42 can control the display of the high-definition video frame having a higher resolution than the case where the image quality enhancement process is not performed. . The noise removal module 141 is the same as the noise removal module 14d in FIG. The control module 42 switches on / off of the noise removal module 14l. The image quality conversion module 14m is the same as the image quality conversion module 14g in FIG.

  Here, a noise removal module 14j is provided at the front stage of the frame processing module 14k, and a noise removal module 14l is provided at the rear stage. Either the noise removal module 14k or the noise removal module 141 may perform noise removal processing on the video frame. Further, the calculation processing amount when the noise removal module 14j performs noise removal processing on the video format is smaller than the calculation processing amount when the noise removal module 14l performs noise removal processing on the video format. This is because the noise removal module 14l performs noise removal processing on the video frame subjected to CC enlargement processing by the frame processing module 14k. The noise removal module 141 can process the image quality of the video frame higher than that of the noise removal module 14j.

  FIG. 8 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the fifth embodiment. The fifth embodiment is a case in which display control of a moving image based on an MPEG2 format video signal input to the signal processing module 14 is performed on the video display 61.

  This is a case where the user acquires the video signal of the net moving image in the MPEG2 format through the network connected to the LAN terminal 67 using the remote controller 10, for example. The control module 42 controls the signal processing module 14 as follows.

  The control module 42 switches the video decoder 14i to decode the MPEG2 format video signal into the MPEG2 format video frame. The control module 42 invalidates the noise removal processing by the noise removal module 14j for the video frame. The control module 42 performs switching so that CC expansion processing and high image quality processing are performed by the frame processing module 14k for the video frame. The control module 42 validates the noise removal processing by the noise removal module 14j for the video frame that has been subjected to CC enlargement processing and high image quality processing by the frame processing module 14k. The control module 42 enables normal YUV420-422 conversion by the image quality conversion module 14g for the video frame.

  Here, when the video decoder 14i decodes a video signal in the MPEG2 format into a video frame in the MPEG2 format, the amount of calculation processing is H.264. H.264 format video signal. The amount of calculation processing is smaller than that in the case of decoding into a H.264 format video frame. Therefore, the signal processing module 14 can allocate the calculation processing load to the frame processing module 14k and the nozzle removal module 14l in consideration of the calculation processing amount of the entire signal processing module 14.

  According to the fifth embodiment, display control of an MPEG2 format video signal as a high-quality moving image can be performed on the entire screen of the video display 61.

  FIG. 9 is a block diagram showing signal processing in each configuration of the signal processing module 14 according to the sixth embodiment. In the sixth embodiment, H.264 input to the signal processing module 14 is used. This is a case where display control of a moving image based on a video signal in the H.264 format is performed on the video display 61. H. The video size of the H.264 format video signal is 720p. The control module 42 controls the signal processing module 14 as follows.

  The control module 42 uses the video decoder 14i to execute the H.264 control. H.264 format video signal. Switch to decode to H.264 format video frame. The control module 42 validates the noise removal processing by the noise removal module 14j for the video frame. The control module 42 switches so that only the CC enlargement process is performed by the frame processing module 14k for the video frame. The control module 42 invalidates the noise removal processing by the noise removal module 14j on the video frame that has been subjected to CC enlargement processing and high image quality processing by the frame processing module 14k. The control module 42 enables normal YUV420-422 conversion by the image quality conversion module 14g for the video frame.

  As described above, the video decoder 14i has a larger amount of calculation processing than the fifth embodiment. In addition, H.C. The video size of the H.264 format video signal is 720p, which is larger than the normal video size. Therefore, the video decoder 14i has a larger calculation processing amount than decoding a video signal having a normal video size. The signal processing module 14 considers the calculation processing amount of the entire signal processing module 14 and is used for the image quality improvement processing and the nozzle removal module 14l by the frame processing module 14k having a large calculation processing amount as in the fifth embodiment. The processing load cannot be distributed. Therefore, the signal processing module 14 performs noise removal processing on the video frame before CC enlargement processing by the frame processing module 14k by the noise removal module 14j.

  FIG. 10 is a block diagram illustrating signal processing in each configuration of the signal processing module 14 according to the seventh embodiment. In the seventh embodiment, H.264 input to the signal processing module 14 is used. This is a case where display control of a moving image based on a video signal in the H.264 format is performed on the video display 61. H. The video size of the H.264 format video signal is 720 × 480, which is the normal size. The control module 42 controls the signal processing module 14 as follows.

  The control module 42 uses the video decoder 14i to execute the H.264 control. H.264 format video signal. Switch to decode to H.264 format video frame. The control module 42 validates the noise removal processing by the noise removal module 14j for the video frame. The control module 42 performs switching so that CC expansion processing and high image quality processing are performed by the frame processing module 14k for the video frame. The control module 42 invalidates the noise removal processing by the noise removal module 14j on the video frame that has been subjected to CC enlargement processing and high image quality processing by the frame processing module 14k. The control module 42 enables normal YUV420-422 conversion by the image quality conversion module 14g for the video frame.

  As described above, the video decoder 14i has a larger amount of calculation processing than the fifth embodiment. However, since the video decoder 14i has a smaller video size than the sixth embodiment, the amount of calculation processing is small.

  The signal processing module 14 cannot allocate the calculation processing load to the nozzle removal module 141 as in the fifth embodiment in consideration of the calculation processing amount of the entire signal processing module 14, but the image quality by the frame processing module 14 k is high. The processing load can be distributed to the processing. Therefore, noise removal processing is performed on the video frame before CC enlargement processing by the frame processing module 14k by the noise removal module 14j. Further, the frame processing module 14k performs CC enlargement processing and image quality enhancement processing on the video frame.

  In the fifth to seventh embodiments, the noise removal module 14j and the noise removal module 141 are provided, but only one of them may be provided. In this case, the control module 42 may switch the circuit arrangement of the processing flow for the video frame, whether the noise removal processing is performed before or after the frame processing module 14k.

  In the first to fourth embodiments, the processes in the noise removal module 14d, the scaler 14f, and the image quality conversion module 14g are switched and combined. However, at least one of the configurations may be switched and used. In the fifth to seventh embodiments, the processes in the noise removal module 14j, the frame processing module 14k, the noise removal module 14l, and the image quality conversion module 14m are switched and combined, but at least one of the configurations is switched. You may make it use.

  As described above, in the present embodiment, the signal processing module 14 performs signal processing on the video frame and audio frame obtained by decoding the video signal and audio signal which are encoded data, and the video display 61 and the speaker 62 in the subsequent stage. Convert to an input format that can be used regardless of its function / performance. For this purpose, the signal processing module 14 changes the combination of the operation modes of the functional blocks according to the amount of calculation processing and the usage status. Even in the multi-function digital television broadcast receiving apparatus 1 that acquires video signals in various formats and enables various operation controls, the signal processing module 14 effectively uses limited functional blocks, It is possible to generate a video frame that is optimally processed to improve the image quality by combining functional blocks according to the amount of arithmetic processing.

  Although this embodiment demonstrated that it was applicable to the digital television broadcast receiver 1 shown in FIG. 1, it is not restricted to this. The present embodiment can also be applied to a set top box type in which at least the video display 61 and the speaker 62 are excluded from the configuration shown in FIG.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Digital television broadcast receiver, 14 ... Signal processing module, 14a ... DEMUX, 14b ... Video decoder, 14c ... Audio module, 14d ... Noise removal module, 14e ... MUX, 14f ... Scaler, 14g ... Image quality conversion module, 14h ... Flash player, 14i ... Video decoder, 14j ... Noise removal module, 14k ... Frame processing module, 14l ... Noise removal module, 14m ... Image quality conversion module, 42 ... Control module, 61 ... Video display.

Claims (9)

Decoding means for decoding a video signal into a video frame;
Noise removing means for removing noise from the video frame;
Resizing means for resizing the video frame;
Image quality conversion means for converting the video frame into a video format for output to the display means by the first image quality conversion or the second image quality conversion having a higher image quality than the first image quality conversion;
Depending on the type of the video signal and the display condition of the video frame on the display means, the noise removing means is turned on / off, the enlargement / same size / reduction processing by the size changing means, and the first image quality conversion means. Control means for switching at least one of the second image quality conversion and the second image quality conversion;
A moving image processing apparatus comprising:   The control means, when the display condition determines that the video frame is displayed at full speed on the display means at the same speed, the noise removing means removes the noise with respect to the video frame decoded by the decoding means, The video frame from which the noise has been removed is subjected to the same size processing by the size changing unit, and the video frame subjected to the same size processing is switched to the second image quality conversion by the image quality conversion unit. The moving image processing apparatus according to claim 1.   The control means turns off the noise removal means and changes the size of the video frame decoded by the decoding means when the display condition determines that the video frame is displayed at full speed on the display means at a speed other than the normal speed. 2. The moving image processing apparatus according to claim 1, wherein the same-size processing is performed by means, and the video frame subjected to the same-size processing is switched so that the first image quality conversion is performed by the image quality conversion means.   The control means turns off the noise removal means when the video signal type is terrestrial digital broadcasting and the display condition determines that the video frame is displayed at full speed on the display means at the same speed. The video frame decoded by a decoding unit is subjected to the enlargement process by the size changing unit, and the video frame subjected to the enlargement process is switched to perform the first image quality conversion by the image quality conversion unit. 1. The moving image processing apparatus according to 1.   The control means, when the type of the video signal is terrestrial digital broadcasting, and the display condition is determined to be a multi-display on the display means at a multiple of the video frames, the noise removal means is turned off, The video frame decoded by the decoding unit is subjected to the reduction processing by the size changing unit, and the video frame subjected to the reduction processing is switched to perform the first image quality conversion by the image quality conversion unit. Item 3. A moving image processing apparatus according to Item 1.   When the control unit determines that the type of the video signal is MPEG2 format, the control unit performs the enlargement process and the resolution enhancement process on the video frame decoded by the decoding unit, and the enlargement process and the resolution process. The image frame that has been subjected to the processing for increasing the resolution is denoised by the noise removing unit, and the image frame that has been denoised is switched so that the image quality converting unit performs the first image quality conversion. The moving image processing apparatus according to claim 1.   The control means has the video signal type H.264. When it is determined that the video size is 720p and the video size is 720p, the video frame decoded by the decoding unit is denoised by the noise removing unit, and the video frame from which the noise has been removed is converted by the size changing unit. 2. The moving image processing apparatus according to claim 1, wherein the enlargement processing is performed, and the image frame subjected to the enlargement processing is switched to the first image quality conversion by the image quality conversion unit.   The control means has the video signal type H.264. If it is determined that the video size is 720 × 480 in the H.264 format, the video frame decoded by the decoding unit is denoised by the noise removing unit, and the size of the video frame from which noise has been removed is changed. And switching the image frame that has been subjected to the enlargement process and the resolution enhancement process by the image quality conversion means to the first image quality conversion by the image quality conversion means. Item 3. A moving image processing apparatus according to Item 1. Decoding video signals into video frames,
Depending on the type of the video signal and the display conditions of the video frame, on / off of noise removal for the decoded video frame, size reduction / same size / enlargement processing, first image quality conversion or the first image conversion Switching at least one of the second image quality conversions with higher image quality than the image quality conversion;
And a moving image processing method.

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