Digital video signal processing apparatus

Abstract: A digital video signal processing apparatus to record or reproduce a video signal is provided in which a specific video signal is transformed by a user. The digital video signal processing apparatus includes a signal detector (110) for detecting the level value of a specific signal selected from video data received, when a specific video detecting signal (172) is applied, and outputting the video data (112) and a region signal (114) for indicating a detected region, a signal manipulator (120) for transforming the level value of a signal in a region detected by the signal detector (110) into the level value of a predetermined signal depending on a signal manipulation control signal (174), a data compressor (130) for compressing digital video data including a specific signal transformed by the signal manipulator (120), a parity adder (140) for adding a parity to the video data compressed by the data compressor (130), a modulator (150) for modulating the video data, to which the parity has been added by the parity adder (140), and specific signal transformation control information data (176) and recording the modulated data onto a recording medium (160), and a controller (170) for applying the specific video detecting signal (172) to the signal detector (110), applying the signal manipulation control signal (174) to the signal manipulator (120), and applying the specific signal transformation control information data (176) to the modulator (150). When a video signal is recorded or reproduced, all but a specific colour desired by a user can be black or white processed, or a specific colour desired by a user can be changed into another colour.

Description: The present invention relates to a digital video signal processing apparatus, and more particularly, to a digital video signal processing apparatus which records or reproduces a video signal. When a user generally records or reproduces a video signal using a digital video signal processing apparatus such as a digital video camera or a video cassette recorder, for special purposes, he or she needs to selectively transform the video signal to obtain artistic or special effects. However, in the prior art, there is no apparatus which selects, transforms and records only a specific signal or arbitrarily manipulates an image in order to apply the man-created beauty to a screen. It is an aim of embodiments of the present invention to provide a digital video signal processing apparatus for selecting a specific video signal, transforming the selected specific video signal into a signal desired by a user, and recording the transformed signal onto a recording medium. Also, it is another aim of embodiments of the present invention to provide a digital video signal processing apparatus for reproducing a specific video signal recorded on a recording medium and transforming the reproduced signal into a signal which is desired by a user. EP 534,438 (Hughes Aircraft Company) discloses a wide field of regard imaging system. A wide field imaging system having high precision and resolution is disclosed herein. The wide field of regard imaging system 10 of the present invention is operative to provide a. composite digital representation of a scene within a field of regard. The system 10 of the present invention includes a sensor arrangement 12 for generating first and second digital representations of first and second framed regions within the field of regard. A scene correlator 18 processes the first and second digital representations to generate offset parameters indicative of the relative locations of the first an second framed regions within the field of regard. The offset parameters are used to combine the first and second digital representations within a frame store memory 20 to synthesize the composite digital representation of the scene. According to a first aspect of the invention, there is provided a digital video signal processing apparatus comprising: a signal detector for detecting the level value of a specific colour signal among received video data, when a specific video detecting signal is applied thereto, and for outputting delayed video data and a region signal for indicating the region of the detected specific colour signal among the received video data; a signal manipulator transforming the level value of the specific colour signal in the region detected by said signal detector and indicated by the region signal into the level value of another colour or black and white signal depending on a signal manipulation control signal; a data compressor for compressing digital video data including a specific signal transformed by said signal manipulator; a parity adder for adding a parity to the video data compressed by said data compressor; a modulator for modulating the video data, to which the parity has been added by said parity adder, and specific signal transformation control information data and recording the modulated data onto a recording medium; and a controller for applying the specific video detecting signal to said signal detector, applying the signal manipulation control signal to said signal manipulator, and applying the specific signal transformation control information data to said modulator. It is preferable that the specific signal transformation control information data of the controller is recorded in an auxiliary region of the digital video standard. According to a second aspect of the invention, there is provided a digital video signal processing apparatus comprising: a demodulator for demodulating compressed digital video data and specific signal transformation control information data which are reproduced from a recording medium; an error corrector for correcting errors of the compressed digital video data and the specific signal transformation control information data which are demodulated by said demodulator; a data decompressor for decompressing the compressed digital video data whose error is corrected by said error corrector; a signal detector for detecting the level value of a specific colour signal among video data of said data decompressor when a specific video detecting signal is applied thereto, and for outputting the video data and a region signal for indicating the region of the detected specific colour signal among the video data ; a signal manipulator for transforming the level value of the specific colour signal in the region detected by said signal detector and indicated by the region signal into the level value of another colour or black and white signal depending on a signal manipulation control signal; a video signal composing portion for composing a composite video signal with the digital video data including transformed signal data output from said signal manipulator; and a controller for receiving the specific signal transformation control information data from said error corrector and allowing the video data from said decompressor to bypass said signal detector and said signal manipulator when a signal input to the controller is indicative that a user wants to reproduce a video signal recorded on the recording medium without any transformation, and applying the specific video detecting signal to said signal detector and applying the signal manipulation control signal to said signal manipulator when signal input to the controller is indicative that the user wants to transform a specific video signal of the video signal recorded thereon. For a better understanding of the invention, and to show how embodiments of the same may be carried into effect, reference will now be made, by way of example, to the accompanying diagrammatic drawings, in which: Figure 1 is a block diagram of a digital video signal processing apparatus according to an embodiment of the present invention; and Figure 2 is a block diagram of a digital video signal processing apparatus for reproducing a specific signal transforming digital video signal recorded by the apparatus of Figure 1. Referring to Figure 1, a digital video signal processing apparatus includes a signal detector 110 for detecting the level value of a specific signal among received video data when a specific video detecting signal 172 is provided thereto and generating a region signal 112 for indicating the region of the detected signal, and outputting delayed video data 114, a signal manipulator 120 for converting the level value of the specific signal detected by the signal detector 110 into the level value of a desired signal depending on a signal manipulation control signal 174, a data compressor 130 for compressing the digital video data output from the signal manipulator 120, a parity adder 140 for adding a parity to video data compressed by the data compressor 130, a modulator 150 for modulating video data to which the parity is added in the parity adder 140 and specific signal transforming control information data 176 and recording the result onto a recording medium 160, and a controller 170 for applying the specific video detecting signal 172 to the signal detector 110, applying the signal manipulation control signal 174 to the signal manipulator 120, and applying the specific signal transformation control information data 176 to the modulator 150. As shown in Figure 1, a digital transformed video signal, i.e., video data is input. If a user wants a specific signal, e.g., a yellow one, among video data to be changed into a pink one, the controller 170 is commanded, for instance by a micom (not shown) to apply the specific video detecting signal 172 to the signal detector 110. The signal detector 110 detects the level value of a yellow signal selected from the received video data, depending on the specific video detecting signal 172 and generates the region signal 112 for indicating the region of detected signal, and delays the received video data by the length of time required for detecting the level value of the signal and outputs the delayed video data 114. The signal manipulator 120 adds or subtracts a predetermined value to or from the level value of the yellow signal in the region detected by the signal detector 110, to convert the level value thereof into that of the desired pink signal. The data compressor 130 compresses video data including a signal converted into the pink signal in the signal manipulator 120, by performing a data compression based on the discrete cosine transform (DCT) thereon. The parity adder 140 adds a parity, to be used for error correction, to the video data compressed by the data compressor 130. The modulator 150 modulates the video data to which the parity is added in the parity adder 140, and the specific signal transforming control information data 176, associated with the signal manipulation in the signal manipulator 120 and output by the controller 170, and records the modulated data onto the recording medium 160. Figure 2 is a block diagram of a digital video signal processing apparatus for reproducing a specific signal transforming digital video signal recorded by the apparatus of Figure 1. The digital video signal processing apparatus shown in Figure 2 includes a demodulator 220 for demodulating compressed digital video data and specific signal transformation control information data reproduced from a recording medium 210, an error corrector 230 for correcting errors of the demodulated video data and the specific signal transformation control information data, a data decompressor 240 for decompressing the compressed digital video data, a signal detector 250 for detecting the level value of a specific signal from the video data and outputting delayed video data 254, a signal manipulator 260 for transforming the level value of the specific signal into the level value of a desired signal according to a signal manipulation control signal 284, a video signal composing portion 270 for composing luminance and colour signal according to digital video data output from the signal manipulator 260, and a controller 280 for receiving specific signal transformation control information data 224 and outputting a specific video detecting signal 282 and a signal manipulation control signal 284 depending on the input of a key. As shown in Figure 2, the demodulator 220 demodulates compressed digital video data reproduced from the recording medium 210. The error corrector 230 corrects errors in the video data demodulated by the demodulator 220 and errors in the specific signal transformation control information data, included in an auxiliary data region of a recording format, which is also demodulated by the demodulator 220. The data decompressor 240 decompresses specific signal data error-corrected by the error corrector 230, e.g., compressed digital video data including a pink signal. When a user reproduces a video signal recorded according to the auxiliary data without any transform, the controller 280 receives the specific signal transformation control information data 224 from the error corrector 230 and applies control signals to the signal detector 250 and the signal manipulator 260, so that the steps of detecting and manipulating a specific signal are not performed and are by passed. However, when the user wants a specific video signal to be converted during reproduction, the controller 280 is commanded, for instance by a micom (not shown) to apply the specific video detecting signal 282 to the signal detector 250. In this case, the signal detector 250 detects the level value of a specific signal selected from received video data according to the specific video detecting signal 282. It then generates a region signal 252 for indicating a detected signal region, delays the received video data by the length of time required for detecting the level value of the signal and outputs the delayed video data 254. Also, the signal manipulator 260 transforms the level value of the specific signal in the detected region into the level value of the desired signal depending on a signal manipulation control signal 284. The video signal composing portion 270 composes a composite video signal with video data output from the signal manipulator 260 and outputs the result. According to the embodiments of the present invention described above, the colour and brightness may be manipulated so that when a video signal is recorded or reproduced, all but a specific colour desired by the user can be black and white processed, or the specific colour desired by the user can be changed into another colour, or only the specific colour desired by a user can be black and white processed while the rest is preserved with its original colours.

Claims: A digital video signal processing apparatus comprising: a signal detector (110) for detecting the level value of a specific colour signal among received video data, when a specific video detecting signal (172) is applied thereto, and for outputting delayed video data (114) and a region signal, (112) for indicating the region of the detected specific colour signal among the received video data; a signal manipulator (120) for transforming the level value of the specific colour signal in the region detected by said signal detector (110) and indicated by the region signal (112) into the level value of another colour or black and white signal depending on a signal manipulation control signal (174); a data compressor (130) for compressing digital video data including a specific signal transformed by said signal manipulator (120); a parity adder (140) for adding a parity to the video data compressed by said data compressor (130); a modulator (150) for modulating the video data, to which the parity has been added by said parity adder (140), and specific signal transformation control information data (176) and recording the modulated data onto a recording medium (160); and a controller (170) for applying the specific video detecting signal (172) to said signal detector (110), applying the signal manipulation control signal (174) to said signal manipulator (120), and applying the specific signal transformation control information data (176) to said modulator (150). A digital video signal processing apparatus as claimed in claim 1, wherein the specific signal transformation control information data (176) of said controller (170) is recorded in an auxiliary region, of the digital video standard. A digital video signal processing apparatus comprising: a demodulator (220) for demodulating compressed digital video data and specific signal transformation control information data which are reproduced from a recording medium (210); an error corrector (230) for correcting errors of the compressed digital video data and the specific signal transformation control information data which are demodulated by said demodulator (220); a data decompressor (240) for decompressing the compressed digital video data whose error is corrected by said error corrector (230) ; a signal detector (250) for detecting the level value of a specific colour signal among video data of said data decompressor (240) when a specific video detecting signal (282) is applied thereto, and for outputting the video data (252) and a region signal (254) for indicating the region of the detected specific colour signal among the video data; a signal manipulator (260) for transforming the level value of the specific colour signal in the region detected by said signal detector (250) and indicated by the region signal (254) into the level value of another colour or black and white signal depending on a signal manipulation control signal (284); a video signal composing portion (270) for composing a composite video signal with the digital video data including transformed signal data output from said signal manipulator (260); and a controller (280) for receiving the specific signal transformation control information data (224) from said error corrector (230) and allowing the video data from said decompressor (240) to bypass said signal detector (250) and said signal manipulator (260) when a signal input to the controller (280) is indicative that a user wants to reproduce a video signal recorded on the recording medium (210) without any transformation, and applying the specific video detecting signal (282) to said signal detector (250) and applying the signal manipulation control signal (284) to said signal manipulator (260) when signal input to the controller (280) is indicative that the user wants to transform a specific video signal of the video signal recorded thereon.

Inventors: KIM YONG-JE, KIM, YONG-JE
Applicants: SAMSUNG ELECTRONICS CO LTD, SAMSUNG ELECTRONICS CO., LTD.
Application year: 1997
Main classification: H04N5
IPC codes: H04N9, H04N5, H04N11, G11B20