JP4305480B2 - Television receiver, television receiving method, image signal processing apparatus, image signal processing method, motion vector detection method - Google Patents

Description

  The present invention relates to a television receiver.

In recent years, with the progress of high-efficiency coding technology, it has become possible to transmit high-quality images at bit rates of several mega to several tens of mega, and research to apply this to digital broadcasting and digital CATV has been promoted. Yes.

In digital broadcasting and digital CATV, an image having a better S / N ratio can be received as compared with the current system, and the television image quality can be improved. Also, the aspect ratio is 16: 9, which is different from the 4: 3 aspect ratio of the current television system, and the widening of the TV image is also realized.

However, in consideration of transmission efficiency and the like, the image scanning form adopts two-to-one interlaced scanning as in the current television system. For this reason, in the reproduced image, as in the current television system, image quality interference due to interlace scanning, for example, interlace interference such as line flicker and pairing occurs. These interlace interferences cause digital broadcasting and digital CA.
There is a problem that high image quality, which is a feature of TV, is impaired.

JP-A-6-165128

The object of the present invention is to provide high quality television signals such as digital broadcasting and digital CATV.
An object of the present invention is to provide a television receiver capable of receiving a high-definition image, a television receiving method, an image signal processing device, an image signal processing method, and a motion vector detection method used for interpolation processing in these devices or methods.

In order to achieve the above object, the present invention is configured as described in , for example, the claims.

According to the present invention, both high-quality, high-definition television signals that are free from interlace interference can be used for both current television systems and digital broadcasts of high-efficiency encoded video encoded signals such as digital broadcasting and digital CATV. A television receiver that receives images as images can be created.

  A first embodiment of the present invention will be described with reference to the block diagram of FIG.

The first television signal S1 is subjected to a predetermined demodulation process by the baseband demodulator 1 to demodulate the composite color television signal S2 in the baseband. The video demodulation unit 2 performs predetermined demodulation processing such as YC separation and color demodulation. Further, signal processing for displaying an image on a screen having an aspect ratio of 16: 9 is performed. For example, for current NTSC television signals, the time axis is 3/4 times in the horizontal direction in order to display non-image areas on the left and right sides of the screen and display images with an aspect ratio of 4 to 3. Perform compression processing. In addition, for letterbox type EDTV television signals, in order to display a full image of the main picture area, 4 in the vertical direction.
/ Performs processing to expand 3 times. The interlaced scanning image signal S3 (luminance signal and two color difference signals) is demodulated.

The MA scan conversion unit 3 generates a signal of the scan line that has been lost in the interlace scan by a conventional motion adaptive interpolation process. Then, the image signal S3 and the interpolation signal are compressed in time in the horizontal direction by half and multiplexed in time series to generate a sequentially scanned image signal S4 (luminance signal and two color difference signals).

On the other hand, the second television signal S10 is subjected to predetermined digital demodulation processing by the channel decoding unit 4 to decode the encoded bit stream signal. Also, a code error correction process and a correction process (replace a code error that cannot be corrected with a highly correlated signal) are performed, and the video encoded signal S11 is decoded. The video decoding unit 5 performs predetermined decoding processing, for example, variable length code decoding, inverse quantization, transform coefficient decoding, and the like, and decodes the image data of the encoded frame. Then, a predetermined image format conversion process is performed, and an interlaced scanning image signal SV (luminance signal and two color difference signals) and motion information data S12 (motion vector signal and prediction error signal) are output. The MC scan conversion unit 6 generates a signal of the scan line missing in the interlace scan by a motion compensation interpolation process using the motion information data S12. Details of this will be described later. Then, the image signal SV and the interpolation signal are compressed in time in the horizontal direction by 1/2 and multiplexed in time series to generate a sequentially scanned image signal S13 (luminance signal and two image difference signals).

The selection unit 7 selects the image signal S4 when receiving the first television signal, and selects the image signal S13 when receiving the second television signal, and outputs it to the output signal S5. Video process part 8
Performs signal processing of a predetermined matrix operation and converts it into signals of the three primary colors RGB. Then, the three primary color image signals S6 (R, G, B signals) are generated. This signal is displayed on the image display unit 9 in an aspect ratio of 16: 9 in the form of progressive scanning, and receives a high-quality, high-definition television image.

  Hereinafter, the MC scan conversion unit 6 in this embodiment will be described in detail.

FIG. 2 is a first block diagram of this. Intra-field interpolation unit 10 and motion compensation interpolation unit 11
, Coefficient weighting unit 12, addition unit 13, delay unit 14, time series multiplexing unit 15, and MC control unit 1
6 and performs scan conversion from interlaced scanning to sequential scanning by motion compensation interpolation processing.

The intra-field interpolation unit 10 converts the signal of the scanning line missing in the interlace scanning into the image signal SV.
The interpolation signal S20 is generated by the arithmetic processing of the scanning line signals in the same field (for example, the average value of the signals of the adjacent upper and lower scanning lines).

The motion compensation interpolating unit 11 selects a pair of scanning line signals suitable for motion compensation interpolation processing based on the interpolated motion vector signal IV from the scanning line signals of adjacent fields of the image signal SV. Then, an interpolation signal S21 is generated with the average value of these signals.

In the coefficient weighting units 12-1 and 12-2, the mixture ratio coefficient k is calculated for the interpolation signals S20 and S21.
And 1-k (0 < k < 1) are weighted. Then, the addition unit 13 adds the two signals weighted by coefficients to generate a motion compensation interpolation signal S22.

The delay unit 14 corrects a time delay generated in the signal processing for generating the motion compensated interpolation signal,
An image signal S23 with a matching time delay is generated. Then, the time series multiplexing unit 15 receives the signal S2
3 and S22 are respectively compressed in the horizontal direction by ½ the time axis and multiplexed in time series to generate a sequentially scanned image signal S13.

Further, the MC control unit 16 generates an interpolated motion vector signal IV and mixing ratio coefficients k and 1-k, as will be described later, based on the motion vector signal MV and the prediction error signal PE of the motion information data S12.

Now, an outline of interpolation motion vector generation will be described with reference to FIG. This figure shows the case where the motion of the image is in the vertical direction. In the figure, white circles indicate scanning lines transmitted by interlaced scanning, black circles indicate interpolation scanning lines, and V _i is a motion vector for one frame obtained by the motion vector signal MV. The signal of the scanning line a in the field 1 moves to the position of the scanning line a in the motion vector V ₀ (still), the scanning line b in the V ₁ , and the scanning line c in the V ₂ in the field 3 after one frame period.
Further, the scanning line d moves to the position of scanning line d at V _-1 and the scanning line e at V _-2 . Therefore, of the motion vector signals, motion vectors that cross the interpolation scanning line (three types of V ₀ , V ₂ , V _{-2 in} the figure).
Can be used for motion compensation interpolation. Therefore, for these motion vectors, as the interpolation motion vector signal IV, and generates a signal V ₀ at IV = 0, V ₂ the IV = 1, V _-2 the IV = -1. On the other hand, among the motion vector signals, motion vectors crossing the transmission scanning line (in the figure, two types of V ₁ and V ₋₁ ) cannot be used for the motion compensation interpolation process. = 0 signal is generated.

Next, an outline of motion compensation interpolation signal generation will be described with reference to FIG. This figure shows the case where the motion of the image is in the vertical direction as in FIG. The signal of the interpolation scanning line α in the field 2 is generated from the signals in the preceding and succeeding fields 1 and 3 adjacent to the signal. That is, when the interpolated motion vector signal IV = 0, the field 1 scan line a and the field 3 scan line a ′, IV = 1, the field 1 scan line b and the field 3 scan line b ′, IV = 2. 1 scan line c and field 3 scan line c ', IV = -1 for field 1 scan line d and field 3 scan line d', for IV = -2, field 1 scan line e and field 3 scan Line e ′
, Are selected as the signals of the pair of scanning lines. Then, with the average value of these signals, an interpolated scanning line signal is generated by motion compensation interpolation processing.

FIGS. 3 and 4 show the case where the image motion is in the vertical direction. However, when the image motion is in the horizontal direction, scanning of the adjacent field 1 and field 3 in the same position as the interpolation scanning line α is performed. Generated from line pixel signals. That is, fields 1 and 3 selected by the interpolation motion vector signal
A signal of an interpolated scanning line is generated by an interpolation process for motion compensation with the average value of the signals of the pair of pixels.
When the movement is in an oblique direction, a motion compensation interpolation process is performed on the vertical and horizontal movements to generate a desired interpolated scanning line signal.

FIG. 5 is a block diagram of the motion compensation interpolation unit 11 that performs the above-described motion compensation interpolation processing.
The vertical compensation generation unit 17 includes a 1-frame delay unit 19, a 1-line delay unit 20, and a selection unit 21. The interpolation motion vector signal IV is a pair of pairs used for motion compensation interpolation processing for vertical motion. The scanning line signals S30 and S31 (for example, the signals of the scanning line b 'in the field 3 and the scanning line b in the field 1 in FIG. 4) are generated.
On the other hand, the horizontal compensation generation unit 18 includes a one-sample delay unit 22 and a selection unit 23. The interpolated motion vector signal IV is a pair of pixel signals S32 used for motion compensation interpolation processing with respect to horizontal motion. S33 is generated. And the calculating part 24 calculates the average value of both signal S32 and S33, and produces | generates the interpolation signal S21 in the output.

If the motion vector signal MV is not applicable to the motion compensation interpolation process, as described above, the process is performed with the interpolation motion vector signal IV = 0 (still), and the motion vector signal MV is added to the stationary part in the motion adaptive interpolation process of the prior art. A signal similar to a suitable interpolation signal is generated in the interpolation signal S21.

FIG. 6 is an explanatory diagram of the operation in the MC control unit 16. (A) and (b) show the soft switch control for continuously changing the mixing ratio coefficient, and (c) and (d) show the operation of on / off control for changing by binary values.

In the soft switch control of FIGS. 9A and 9B , when the motion vector signal MV is suitable for the motion compensation interpolation process (corresponding to the motion vectors V ₀ , V ₂ , and V _{−2 in} FIG. 3), An interpolation motion vector signal IV is generated from the motion vector signal. The mixing ratio coefficient is set according to the magnitude of the absolute value of the prediction error signal PE, as shown in the characteristics of (a) when MV motion compensation interpolation is possible.

That is, when | PE | is less than E1, the accuracy of the motion vector signal is high. Therefore, k = 0 is set, and a signal generated by interpolation processing for motion compensation is used. On the other hand, when | PE | is equal to or greater than E2, the accuracy of the motion vector signal is poor, and there is a high possibility of performing motion compensation interpolation processing with a motion different from the original motion of the image. The signal generated by the interpolation process is used. Also, in the region where | PE | is from E1 to E2, depending on the value of | PE |, the motion compensation interpolation component is mainly in the vicinity of E1, and the interpolation processing component in the field is mainly in the vicinity of E2. Then, k is changed from 0 to 1.

Next, when the motion vector signal MV is unsuitable for motion compensation interpolation processing (corresponding to the motion vectors V ₁ and V _{−1 in} FIG. 3), the interpolation motion vector signal IV generates IV = 0 (still). To do. The mixing ratio coefficient is set according to the magnitude of the absolute value of the motion vector signal MV, as shown in the characteristic of (b) when MV motion compensation interpolation is not possible. That is, for a still or very slow motion of an image where | MV | is less than V _α , k = 0 is set, and an interpolation signal suitable for a stationary part generated by IV = 0 motion compensation interpolation is used. . Moreover, | MV | in motion of V _beta more rapid rate of the image, is set to k = 1, using a signal generated by the interpolation processing in a field suitable for moving image part. On the other hand, in the region where | MV | is V _α to V _β , k is changed from 0 to 1 according to the value of | MV |. Thereby, it is possible to perform motion adaptive interpolation processing according to the speed of motion of the image.

In the ON / OFF control of FIGS. 9C and 9D , when the motion vector signal MV is suitable for the interpolation process for motion compensation, an interpolation motion vector signal IV is generated from the motion vector signal, and the mixing ratio coefficient is (c) . As shown when MV motion compensation interpolation is possible, k = 0 when the prediction error signal | PE | is less than E1, and k = 1 when E1 or more. On the other hand, when the motion vector signal MV is unsuitable for the interpolation processing for motion compensation, an interpolated motion vector signal IV = 0 is generated, and the mixing ratio coefficient is motion as shown in (d) when MV motion compensation interpolation is not possible. vector signal | MV | less than the V _alpha is at k = 0, _V α or set to k = 1, interpolation is performed for motion-adaptive in response to the speed of movement of the image. However, in the on / off control, image quality deterioration due to a change in the mixing ratio coefficient occurs in some cases. For this reason, it is desirable to perform soft switch control from the viewpoint of image quality.

As described above, according to FIG. 2, the interpolation scanning matched to the motion of the image is performed based on the motion vector signal by the motion compensation interpolation processing using the interpolation motion vector signal and the motion adaptive interpolation processing according to the motion speed. A line signal can be generated.

Next, FIG. 7 shows a second block diagram of the MC scan conversion unit 6 of this embodiment. Inter-field interpolation unit 10, motion compensation interpolation unit 11, coefficient weighting unit 12, addition unit 13, delay unit 14, time series multiplexing unit 15, mode setting unit 25, and MC control unit 26, and motion compensation interpolation The process performs scan conversion from interlaced scanning to sequential scanning.

The intra-field interpolation unit 10 generates an interpolation signal S20 by processing the signals of the scanning lines in the same field of the image signal SV, and the motion compensation interpolation unit 11 scans the scanning lines of the adjacent fields before and after the image signal SV. The interpolation signal S21 is generated by a motion compensation process in which the above signal is selected by the interpolation motion vector signal IV.

The coefficient weighting units 12-1 and 12-2 weight the coefficient values of the mixing ratio coefficients k and 1-k (0 < k < 1), add the signals weighted by the adding unit 13, A compensation interpolation signal S22 is generated.

The delay unit 14 adjusts the time delay caused by the signal processing, and the image signal S2 having the matched time delay.
3 is generated. The time series multiplexing unit 15 compresses the signals S23 and S22 in the horizontal direction by halving the time axis and multiplexes them in time series to generate a sequentially scanned image signal S13.

The mode setting unit 25 sets an interpolation processing mode based on the motion vector signal MV of the motion information data S12 as will be described later, and the first interpolation mode (the same interpolation processing as in the first configuration example described above). The mode signal MOD of L is generated in the second interpolation mode. And MC
The control unit 26 generates an interpolated motion vector signal IV and mixing ratio coefficients k, 1-k based on the motion vector signal MV and the prediction error signal PE in accordance with the mode signal MOD.

FIG. 8 is a block diagram of the mode setting unit 25. The main scanning line signal interpolation unit 27 is a motion vector that crosses the transmission scanning line in the motion vector signal MV (for example, V ₁ ,
Based on V ₋₁ ), motion compensation interpolation processing is performed to generate a transmission scanning line interpolation signal SV ′. The calculation unit 28 performs a subtraction operation between the image signal SV of the scanning line at the same position and the transmission scanning line interpolation signal SV ′ to generate an error signal ER.

When the motion vector signal has high accuracy, the transmission scanning line interpolation signal SV ′ is substantially the same signal as the image signal SV, so that the error signal ER has a substantially zero component.
On the other hand, if the accuracy of the motion vector signal is poor, the component of the error signal ER is large.
Therefore, the accuracy of the motion vector signal can be verified with the magnitude of the component of the error signal ER.

Therefore, the determination unit 29 verifies the accuracy of the motion vector signal based on the magnitude of the absolute value of the error signal ER. A first interpolation mode for performing interpolation processing for motion compensation based on a motion vector signal when the threshold value is less than the threshold Th, and a second interpolation mode for performing interpolation processing for motion adaptation according to the motion speed when the threshold value is equal to or greater than the threshold Th. And a mode signal MOD corresponding to this is generated.

FIG. 9 is an explanatory diagram of the operation of the MC control unit 26. FIG. 4A shows the operation in the second interpolation mode in which the MOD signal is H. In this mode, motion adaptive interpolation processing is performed according to the speed of motion, so that the motion compensated interpolation unit 11 generates an interpolation signal suitable for the stationary unit, so that the interpolation motion vector signal IV has IV = 0 (still). Generate a signal. The mixing ratio coefficient in response to the magnitude of the absolute value of the motion vector signal MV, from the less than V α _k = 0, V α to V _beta 0
1 to increase continuously from the V _beta or generating a coefficient value of k = 1.

FIG. 5B shows the operation in the first interpolation mode in which the MOD signal is L. When the motion vector signal MV is suitable for the motion compensation interpolation process (corresponding to the motion vectors V ₀ , V ₂ , and V _{-2 in} FIG. 3), the motion vector signal IV is used to generate the interpolation motion vector signal IV. Further, the mixing ratio coefficient is k = 0, E1 to E2 if it is less than E1, depending on the magnitude of the absolute value of the prediction error signal PE, as in the case of MV motion compensation interpolation possible in FIG. Increases continuously from 0 to 1 and generates a coefficient value of k = 1 above E2. On the other hand, when the motion vector signal is unsuitable for the motion compensation interpolation process (corresponding to the motion vectors V ₁ and V _{−1 in} FIG. 3), the interpolation motion vector signal IV generates IV = 0. Also, the mixing ratio coefficient is k = 0, V _α to V _β below V _α according to the magnitude of the absolute value of the motion vector signal MV, as in the characteristic of (b) when MV motion compensation is not possible. increases from 0 continuously to 1, the V _beta or generating a coefficient value of k = 1.

As described above, according to the second configuration example, motion compensation interpolation processing is performed when the accuracy of the motion vector signal is high, and motion adaptation interpolation processing according to the motion speed is performed when the accuracy is low.
An interpolated scanning line signal that matches the motion of the image can be generated.

Next, FIG. 10 shows a third configuration example of the MC scan conversion unit 6 of this embodiment. The intra-field interpolation unit 10, the motion compensation interpolation unit 30, the coefficient weighting unit 12, the addition unit 13, the delay unit 14, the time series multiplexing unit 15, and the MC control unit 31 are configured to perform motion adaptation according to the motion speed. In the interpolation process, scan conversion from interlaced scanning to sequential scanning is performed.

The intra-field interpolation unit 10 generates the interpolation signal S20 by the arithmetic processing of the scanning line signal in the same field of the image signal SV. The motion compensation interpolation unit 30 generates the interpolation signal S24 suitable for the stationary part of the interpolated motion vector signal IV = 0 by using the scanning line signals of the adjacent fields before and after the image signal VS.

The coefficient weighting units 12-1 and 12-2 weight the coefficient values of the mixing ratio coefficients k and 1-k (0 < k < 1), add the signals weighted by the adding unit 13, A compensation interpolation signal S22 is generated.

The delay unit 14 adjusts the time delay generated by the signal processing described above, and generates an image signal S23 having the same time delay. The time series multiplexing unit 15 compresses the signals S22 and S23 in the horizontal direction by halving the time axis and multiplexes the signals in time series to generate a sequentially scanned image signal S13.

The MC control unit 31 generates mixing ratio coefficients k and 1-k based on the motion vector signal MV of the motion information data S12.

FIG. 11 is an explanatory diagram of the operation of the MC control unit 31. Depending on the magnitude of the absolute value of the motion vector signal MV, continuously increases from V is less than _alpha k = 0, V _alpha until V _beta to 0 1,
Above _Vβ , a coefficient value of k = 1 is generated. Incidentally, in addition to the characteristics of the soft switch control, such as shown in the figure, less than V _alpha is at k = 0, V _alpha or can generate a coefficient value by the characteristics of the on-off control of k = 1.

As described above, according to FIG. 10, by performing the motion adaptive interpolation process according to the motion speed using the motion vector signal, it is possible to generate an interpolated scanning line signal that matches the image motion.

In addition, about each other block in a present Example, it can implement | achieve easily by a prior art.

According to the present embodiment, motion adaptive interpolation processing for the first television signal, and motion compensation interpolation processing using the motion information data of the video encoded signal for the second television signal. As a result, a television receiver that receives high-quality, high-definition television images without interlace interference can be realized.

  Next, a second embodiment of the present invention will be described with reference to the block diagram shown in FIG.

The first television signal S1 is subjected to a predetermined demodulation process by the baseband demodulator 1 to demodulate the composite color television signal S2 in the baseband. The video demodulation unit 2 performs predetermined demodulation processing such as YC separation and color demodulation. In addition, for signal processing for displaying an image on a screen having an aspect ratio of 16: 9, for example, for a current NTSC television signal,
In order to display an image having an aspect ratio of 4 to 3 with a non-image area on the left and right sides of the screen, a process of compressing the time axis by 3/4 in the horizontal direction is performed. The interlaced scanning image signal S3 (
(Brightness signal and two color difference signals) are demodulated. This signal is supplied to the motion detector 32, for example,
The motion information MD is detected based on the presence or absence of a difference signal between frames.

On the other hand, the second television signal S10 is subjected to predetermined digital demodulation processing by the channel decoding unit 4 to decode the encoded bit stream signal. Also, a code error correction process and a correction process (replace a code error that cannot be corrected with a high signal between phases) are performed, and the video encoded signal S
11 is decrypted. The video decoding unit 5 is a predetermined decoding process such as variable length code decoding,
Inverse quantization, transform coefficient decoding, and the like are performed to decode the image data of the encoded frame. Then, a predetermined image format conversion process is performed, and an interlaced scanning image signal SV (luminance signal and two color difference signals) and a motion vector signal MV of motion information data are output.

The selection unit 33 outputs the image signal S3 when receiving the first television signal and the image signal SV when receiving the second television signal to the image signal S7. Further, as the motion signal MI, motion information MD is output when the first television signal is received, and a motion vector signal MV is output when the second television signal is received.

The MA scan conversion unit 34 generates a signal of the scan line missing in the interlace scan by a motion adaptive interpolation process according to the motion signal MI, performs a scan conversion process from the interlace scan to the sequential scan, and performs the sequential scan process. An image signal S8 (luminance signal and two color difference signals) is generated. Then, the video processing unit 8 performs signal processing of a predetermined matrix operation, and performs image signals S of the three primary colors RGB system.
Convert to 6. This signal is displayed on the image display unit 9 in an aspect ratio of 16: 9 in the form of progressive scanning to receive a high-quality, high-definition television image.

FIG. 13 is an explanatory diagram of the MA scan conversion unit 34. As shown in FIG. 2A, the configuration includes an intra-field interpolation unit 10, an inter-field interpolation unit 35, a coefficient weighting unit 12, an adding unit 13, a delay unit 14, a time series multiplexing unit 15, and a coefficient setting unit 36. To do.

The intra-field interpolation unit 10 generates an interpolation signal S40 suitable for the moving image part by arithmetic processing (for example, the average of the signals of the upper and lower scanning lines) of the scanning lines in the same field of the image signal S7. The inter-field interpolation unit 35 is an arithmetic process of scanning line signal of adjacent fields before and after,
An interpolation signal S41 suitable for the stationary part is generated.

The coefficient weighting units 12-1 and 12-2 weight the coefficient values of the mixture ratio coefficients k and 1-k (0 < k < 1), add the signals weighted by the adding unit 13, and perform motion adaptation. Interpolated signal S42 is generated.

The delay unit 14 adjusts the time delay generated by the signal processing described above, and generates the image signal S43 having the same time delay. Then, the time series multiplexing unit 15 compresses the signals S42 and S43 in the horizontal direction by halving the time axis and multiplexes them in time series to generate a sequentially scanned image signal S8.

FIG. 5B is an example of a characteristic of the mixing ratio coefficient. For the first television signal, depending on the magnitude of the absolute value of the motion information MD, k = 0 for less than M1, continuously increasing from 0 to 1 for M1 to M2, and k for M2 or more. = 1 coefficient value is generated. On the other hand, for the second television signal, as shown (c), the can in accordance with the magnitude of the absolute value of the motion vector signal MV, from the less than V α _k = 0, V α to V _beta 0 1 to increase continuously from the V _beta or generating a coefficient value of k = 1. Thereby, adaptive processing according to the speed of motion can be realized, and interpolation processing in a form consistent with visual characteristics can be performed.

The other blocks in the present embodiment can be easily realized by conventional techniques.

According to the present embodiment, the first television signal is subjected to motion adaptive interpolation processing, and the second television signal is subjected to motion adaptive interpolation processing based on the speed of motion, thereby preventing interlace interference. It is possible to realize a television receiver that can receive a high-quality, high-definition television image with extremely little.

In the embodiment, the mixing ratio coefficient setting parameter (for example, E1, E2, V
_α , V _β , and M1, M2) can be freely set within a range where there is no practical problem.

The block diagram of the 1st Example of this invention. FIG. 2 is a first block diagram of an MC scan conversion unit in FIG. 1. Explanatory drawing of the interpolation motion vector production | generation in this invention. Explanatory drawing of the motion compensation interpolation signal generation in this invention. FIG. 3 is a block diagram of a motion compensation interpolation unit in FIG. 2. Explanatory drawing of operation | movement of MC control part in FIG. The 2nd block diagram of MC scan conversion part. The block diagram of the mode setting part in FIG. Explanatory drawing of operation | movement of MC control part in FIG. The 3rd block diagram of MC scan conversion part. Explanatory drawing of operation | movement of MC control part in FIG. The block diagram of the 2nd Example of this invention. Explanatory drawing of the MA scanning conversion part in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Baseband demodulation part, 2 ... Video demodulation part, 3 ... MA scanning conversion part, 4 ... Channel decoding part, 5 ... Video decoding part, 6 ... MC scanning conversion part, 7 ... Selection part, 8 ... Video process Part,
9: Image display unit.

Claims (5)

An input unit for inputting a television signal which is a video encoded signal including an interlaced image signal and a motion vector ;
The scan line omission by interlace scanning of the image signal included in the video encoded signals, using the average value of the pixel values of the pixels of the pair indicated by the start point and the end point of the motion vector detected from the video encoding signal A conversion unit that generates the pixel value of the pixel of the scanning line by an interpolation process and converts the pixel value to a sequentially scanned image signal;
A display unit for displaying images sequentially scanned by the conversion of the conversion unit,
The conversion unit may decodes the video encoded signal, whether the motion vector of the field after the conversion target field from the previous field of the conversion target field passes through the interpolation scanning line position conversion processing target field When the motion vector obtained by decoding passes through the interpolation scanning line position of the conversion target field, the motion vector is detected as a motion vector used for the interpolation processing, and the obtained motion vector is decoded. If the motion vector does not pass through the interpolation scanning line position of the conversion target field, instead of detecting the motion vector as a motion vector used for the interpolation processing, a motion vector indicating stillness is detected as a motion vector used for the interpolation processing. A television receiver characterized by that. An input step of inputting a television signal which is a video encoded signal including an interlaced scanning image signal and a motion vector ;
The scan line omission by interlace scanning of the image signal included in the video encoded signals, using the average value of the pixel values of the pixels of the pair indicated by the start point and the end point of the motion vector detected from the video encoding signal A conversion step of generating the pixel value of the pixel of the scanning line by an interpolation process and converting the pixel value to a sequentially scanned image signal;
A display step for displaying the images sequentially scanned by the conversion step,
In the conversion step, whether or not obtained by decoding the video encoded signals, the motion vector to a field after conversion processing target field from the previous field of the conversion target field passes through the interpolation scanning line position conversion processing target field When the motion vector obtained by decoding passes through the interpolation scanning line position of the conversion target field, the motion vector is detected as a motion vector used for the interpolation processing, and the obtained motion vector is decoded. If the motion vector does not pass through the interpolation scanning line position of the conversion target field, instead of detecting the motion vector as a motion vector used for the interpolation processing, a motion vector indicating stillness is detected as a motion vector used for the interpolation processing. A television image receiving method comprising: An input unit for inputting an input signal Ru video encoded signals der including the image signal and the motion vectors of the interlaced scanning,
Based wherein the scanning line is exited by interlace scanning of the image signal included in the video encoding signal, the average value of the pixel values of the pixels of the pair indicated by the start point and the end point of the motion vector detected from the video encoding signal A conversion unit that generates a pixel value of a pixel of the scanning line and converts it into an image signal for sequential scanning,
The conversion unit may decodes the video encoded signal, whether the motion vector of the field after the conversion target field from the previous field of the conversion target field passes through the interpolation scanning line position conversion processing target field When the motion vector obtained by decoding passes through the interpolation scanning line position of the conversion target field, the motion vector is detected as a motion vector used for the interpolation processing, and the obtained motion vector is decoded. If the motion vector does not pass through the interpolation scanning line position of the conversion target field, instead of detecting the motion vector as a motion vector used for the interpolation processing, a motion vector indicating stillness is detected as a motion vector used for the interpolation processing. An image signal processing apparatus. An input step of inputting an input signal Ru video encoded signals der including the image signal and the motion vectors of the interlaced scanning,
Based wherein the scanning line is exited by interlace scanning of the image signal included in the video encoding signal, the average value of the pixel values of the pixels of the pair indicated by the start point and the end point of the motion vector detected from the video encoding signal A conversion step of generating the pixel value of the pixel of the scanning line by an interpolation process and converting the pixel value to a sequentially scanned image signal,
In the conversion step, whether or not obtained by decoding the video encoded signals, the motion vector to a field after conversion processing target field from the previous field of the conversion target field passes through the interpolation scanning line position conversion processing target field When the motion vector obtained by decoding passes through the interpolation scanning line position of the conversion target field, the motion vector is detected as a motion vector used for the interpolation processing, and the obtained motion vector is decoded. If the motion vector does not pass through the interpolation scanning line position of the conversion target field, instead of detecting the motion vector as a motion vector used for the interpolation processing, a motion vector indicating stillness is detected as a motion vector used for the interpolation processing. An image signal processing method comprising: To convert to progressive scan image signal included in the input signal is a video coded signal comprising motion vectors from interlaced scanning, pixels of the pixel pair indicated by the start point and the end point of the video coded signal motion vector A motion vector detection method used for an interpolation process for generating a scan line missing by interlaced scanning of the image signal by calculating a pixel value of pixels of the scan line based on an average value of the values ,
It is determined whether or not a motion vector obtained by decoding the video encoded signal from the field before the conversion process target field to the subsequent field of the conversion process target field passes through the interpolation scanning line position of the conversion process target field. ,
When the motion vector obtained by decoding passes through the interpolation scanning line position of the conversion processing target field, the motion vector is detected as a motion vector used for the interpolation processing,
If the motion vector obtained by decoding does not pass through the interpolated scanning line position conversion processing target field, instead of detecting a motion vector using a motion vector in the interpolation processing, the interpolation processing the motion vector indicating a static detection method of a motion vector, and detecting a motion vector to be used for.

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