Canon Kabushiki Kaisha

Nobuhiro Hoshi

Kenichi Nagasawa

Tomoyuki Ohno

Akihiro Shikakura

Yushi Kaneko

Toshihiro Yagisawa

Nobuharu Ichihashi

Hisashi Ishikawa

Toshihiko Suzuki

Yoshiki Ishii

Tetsuya Shimizu

Kohei Inamura

Izumi Kanai

Yukinori Yamamoto

Yukio Hiraki

Seiji Osawa

Masaru Tada

Masahiko Enari

Motokazu Kashida

Akio Fujii

Ikuo Watanabe

Shingo Ikeda

Kenichiro Ono

Hiroshi Takizawa

The tuner unit of a digital broadcast receiving apparatus receives a digital broadcast and generates a data stream from a digital broadcast signal having a desired modulation frequency. A data stream of a digital broadcast is also input from an external digital broadcast receiving apparatus via an external I/F. A stream switching unit and demultiplexer play back the content on a desired channel, contained in the two data streams, on an image display unit in real time, and at the same time, store the content on the other channel, contained in the other data stream, in a storage unit. This makes it possible to watch one of at least two programs with different modulation frequencies while recording the other program.

Receiving apparatus and control method therefor

An image processing method includes the steps of detecting the dynamic range of input image data, performing edge enhancement processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels is determined based on a parameter indicating the level of the dynamic range and a parameter indicating the level of the edge enhancement processing.

Image processing method and apparatus

A signal processing method comprises the steps of: inputting three signals specifying a color of one pixel; and generating four signals from the input three signals, wherein each of said four signals represents intensities of four different colors to display a color of one pixel by mixing colors, wherein said generating step includes a first converting step of converting the input three signals to two signals representing intensities of two colors among the four colors and a signal representing intensity of a mixed color obtained by mixing (a) the four colors or (b) a plurality of colors among the four colors; and a second converting step of converting the signal representing intensity of the mixed color to a plurality of signals representing intensities of a plurality of colors including at least other two colors different from the two colors.

Signal processing method, image display apparatus, and television apparatus

An image processing method includes the steps of detecting a dynamic range of input image data, performing resolution conversion processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels in the dithering processing is determined, based on a parameter indicating the level of the dynamic range and a parameter concerning the resolution conversion processing.

In the image display device according to the present invention, control is performed such that a condition of not using a subsidiary pixel which corresponds to a specific color among the subsidiary pixels constituting a first pixel is selected as a condition for signal processing to output a signal for designating intensity of each subsidiary pixels constituting the first pixel, and a condition of using a subsidiary pixel which corresponds to a specific color among the subsidiary pixel constituting a second pixel is selected as a condition for signal processing to output a signal for designating intensity of each subsidiary pixels constituting the second pixel adjacent to the first pixel in the first direction.

Image display apparatus

An image processing method includes the steps of performing resolution conversion processing on input image data to increase the number of grayscale levels, performing edge enhancement processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels is determined, based on a combination of a parameter concerning the resolution conversion processing and a parameter indicating the level of the edge enhancement processing.

A recording apparatus includes an input device for inputting a television signal and channel information relating to the television signal from an external receiving apparatus which receives the television signal and generates the channel information, a recording device for recording the television signal, and a controller for controlling the recording device based on the channel information input by the input device.

Recording apparatus and method with selection of first tuner or second tuner for receiving image data of designated channel

There is provided information processing apparatus/method featured by selecting the desired packets from input stream data containing plural packets multiplexed on time-division basis, counting the number of packets other than the desired packets in the input stream data, and recording, on a recording medium, the data of the desired packets and the information data indicating the number of the counted packets.

Information processing apparatus, method therefor and memory medium storing information processing program

An encoding apparatus including a block forming unit for dividing an input signal into blocks each consisting of a plurality of sample values, an orthogonal conversion unit for orthogonally converting the input signal blocks, a detection unit for detecting the characteristic of each block in accordance with orthogonal conversion coefficients obtained by the orthogonal conversion unit, a selection unit for selecting optimal quantization parameters which can realize a constant code amount obtained when the input signal blocks are encoded in a unit consisting of a plurality of input signal blocks, a changing unit for changing the quantization parameters selected by the selection unit in accordance with an output from the detection unit, and an encoding unit for encoding the orthogonal conversion coefficients from the orthogonal conversion unit using the quantization parameters changed by the changing unit.

Code amount control device and encoding apparatus using the same

An image processing apparatus comprises a receiving device for receiving encoded image data which is encoded by using orthogonal transform in a predetermined block unit, an error detecting device for detecting a transmission error of the encoded image data, a correcting device for correcting the transmission error in the predetermined block unit, and a decoding device for decoding the encoded image data and outputting image data for reproducing an image. The image processing apparatus satisfactorily controls the amount of compressed data and prevents a deterioration of image quality even if any error occurs on a transmission path, thereby reproducing good image quality.

Error correction and concealment technique

A coding apparatus includes a large block forming unit for forming a large block of sample values of an input signal, a small block forming unit for dividing the large block into a plurality of small blocks, a first coding unit for coding the small blocks of the input signal by using a difference signal obtained by subtracting a predicted value from the small blocks of the input signal, a second coding unit for coding the small blocks of the input signal without using the difference signal, and a selecting unit for selecting the first or second coding unit in units of large blocks.

Coding apparatus

There is provided a coding apparatus which comprises a coding section for variable-length coding an input signal on a predetermined unit basis, an output section for outputting the data which was variable-length coded by the coding section on the predetermined unit basis, and an error correction adding section for adding an error correction code to the coded data outputted from the output section.

Variable length coding apparatus

There is provided code amount control in which information data are input in predetermined units and a code amount is estimated in each of a plurality of stages, including a final stage. A calculation result is obtained based on a target code amount and the estimated code amount, for each stage. A short code amount and an excess code amount are updated based on the calculation result, and quantization parameters used upon encoding are controlled in accordance with the short code amount and the excess code amount obtained at the final estimation stage. Also provided is code amount control for controlling a code amount in units of second blocks, each consisting of a plurality of first blocks, each consisting of a plurality of sample value data, which discriminates quantization parameters which result in a code amount less than a predetermined amount when a second block of data is encoded using the quantization parameters. The discriminated quantization parameters are adjusted on a unit basis of the first block.

Controlling quantization parameters based on code amount

An image processing apparatus including: an input device for inputting image data; a first encoding device for encoding the image data with first parameter; a second encoding device for encoding the image data with second parameter; a first counting device for counting the first amount of encoded image data encoded by the first encoding device; a second counting device for counting second amount of encoded image data encoded by the second encoding device; and a calculating device for calculating third parameter, with which the image data is encoded to a predetermined amount of encoded data, in accordance with both of the first and the second amounts of encoded image data.

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Kanagawa, Japan

Nobuhiro Hoshi