Abstract: In an image pickup device for generating a corrected luminance signal by subtracting two color difference signals as correction signals from a luminance signal, a correction signal is generated by base-clipping at least one of the two color difference signals.

Abstract: An apparatus for reproducing video signals from the recording medium in which the video signals to which the control information pertaining to the image plane corresponding to every image plane is added are previously recorded. Upon reproduction of the video signals in accordance with an array pattern of the image plane different from the pattern used at the time of recording, at least a portion of the control information added to the video signals reproduced by the reproducing apparatus is changed into other information in accordance with the above-mentioned pattern to obtain the control information used for processing the video signals, thereby allowing an excellent image plane to be obtained.

Abstract: An image processing apparatus for performing digital signal processing on an input color video signal is provided with a delay circuit for cancelling a time difference which occurs between a luminance signal component and a chrominance signal component of the input color video signal in accordance with a difference between a filtering processing for the luminance signal component and a filtering processing for the chrominance signal component.

Abstract: In a coding apparatus of the invention, codes each consisting of l bits are formed from information data formed by sampling and the m (l and m being integers each equal to at least 2) predictive codes so formed are converted into a code of (m.times.l+a) bits (a being a positive integer), so that an information signal can be compressed at a low data error generation ratio and at a high compression ratio.

Abstract: A digital video signal processing device, comprises a first processor for subsampling a digital video signal to produce a subsampled signal, a second processor for producing an expanded signal from a signal input thereto, a digital filter for limiting the bandwidth of a digital video signal input thereto, and a switch for switching over the operation of device between a first state in which the digital video signal input to the device is input to the digital filter and the digital filter output is supplied to the first processor and a second state in which the expanded signal produced by the second processor is supplied to the digital filter.

Abstract: In an information signal recording apparatus having an m (m.gtoreq.2) number of heads arranged to record, in many parallel tracks on a recording medium, information signals of the m number of channels by simultaneously tracing the surface of the medium while simultaneously forming thereby the m number of tracks, pilot signals of an n number of kinds are recorded in rotation along with the information signals of the m number of channels in such a way as to recur in a cycle of an (n.times.m) number of tracks.

Abstract: An image information transmission apparatus of this invention encodes and transmits image information. An image information signal of one frame consisting of a plurality of pixel data is divided into a plurality of blocks each consisting of a predetermined number of pixel data. At least two reference value data associated with a dynamic range of levels of the pixel data constituting each of the divided blocks, and distribution state data associated with a distribution state thereof are formed. Each pixel data constituting the block is encoded on the basis of the formed reference value data and the formed distribution state data to obtain encoded data. A transmission data series is formed and transmitted using the formed reference value data, the formed distribution state data, and the encoded data as transmission units. Therefore, the image information signal can be highly effectively transmitted with minimum image quality degradation caused by encoding.

Abstract: There is provided a color video signal processing device in which pixels are thinned out for a whole picture plane with respect to each of two kinds of digital color difference signals in accordance with a predetermined role. The encoding is executed on a unit basis of a block consisting of (n.times.m) samples where (n and m are integers no less than 2) which are formed with respect to each of the two kinds of color difference signals whose pixels have been thinned out or a block consisting of (n.times.m) samples formed so as to include both of the two kinds of color difference signals whose pixels had been thinned out. The data compression is executed on a block unit basis.

Abstract: A digital signal recording apparatus is provided with data compressing means for reducing the amount of data of digital information supplied; recording means which is arranged to be capable of selectively recording the digital data supplied or digital data compressed by the data compressing means by means of at least one pair of heads; and switching means for switching a cycle in which recording is performed by the pair of heads from one cycle over to another according to the information to be recorded by the recording means.

Abstract: In a digital video signal processing device, a digital filter two-dimensionally limits the bandwidth of a digital video signal which is obtained by time-base multiplexing a digital luminance signal with a digital chrominance signal for each horizontal scanning line, and the signal which has been band-limited by the digital filter is offset-subsampled.

Abstract: A sampled-value code processing device in which, from the sampled-value code series input at a predetermined period, a first code series consisting of codes related to a group of sampled values determined according to a prescribed rule and a second code series consisting of codes related to sampled values other than the group of sampled values are each produced at a period longer than the predetermined period, and a filtering process for the first code series is performed by using the second code series.

Abstract: An image signal encoding apparatus for encoding an image signal in which image of one picture plane consisting of a plurality of pixel data are divided into a plurality of blocks each consisting of a predetermined number of pixel data. For each of the blocks, a pair of reference value data regarding the maximum and minimum values of the levels of the pixel data constructing the block are formed. On the basis of the formed reference value data, encoded date is formed by encoding each of the pixel data of the block. Decoded data is formed by decoding the encoded data formed on the basis of the reference value data. By comparing each of the pixel data of the block with the decoded data, errors are detected. The reference value data are corrected in accordance with the result of the detection. Thus, the encoding errors are reduced and it is possible to perform the encoding with less deterioration in picture quality of the image signal.

Abstract: An information data transmission system deals with a plurality of kinds of information data different in quantity from one another and respectively corresponding to prescribed amounts of an information signal. The system has first encoding circuitry for encoding the plurality of kinds of information data and second encoding circuitry for predictively encoding the plurality of kinds of information data. The timing of the production of outputs from the first and second encoding circuits is such that, for all kinds of the plurality of information data, the quantity of information data encoded by the first encoding circuitry is equalized.

Abstract: A digital information signal recording apparatus has a first mode in which a digital information signal of one channel is recorded on a recording medium at a given bit rate and a second mode in which digital information signals of n channels (n: an integer which is at least 2) are simultaneously recorded on the recording medium at a bit rate which is 1/n of the given bit rate.

Abstract: A data transmission system operative to transmit data with a reduced low band frequency component includes facility for processing a predetermined quantity of information data, such as a code word, for generating error detecting-correcting data, and for dispersing the latter data in the former data. In one practice for effecting the dispersion, the system divides the information data and the error detecting-correcting data into respective groupings, and disperses the latter grouping into the former grouping. The resulting signal is transmitted.