Pioneer Corporation

Yasuyuki Umehara

Tsutomu Takahashi

Donghua Liu

Yuji Shimizu

Takashi Irisawa

Yukiyoshi Haraguchi

Yuji Matsumoto

Hayato Watanabe

Takeshi Nonaka

Kyoko Oishi

Koichiro Kakutani

Shinya Sasatani

An information processor including a processing device for recording information on a recording medium or reproducing the information recorded on the recording medium, is provided with: an encrypting/decrypting device which is capable of an encrypting operation for encrypting the information to be recorded when the information is recorded on the recording medium and a decrypting operation for decrypting the information to be reproduced from the recording medium when the information is reproduced from the recording medium; the processing device which includes the two or more encrypting/decrypting devices; a control device which controls the encrypting/decrypting device so as to perform one of the encrypting operation and the decrypting operation; and a switching device which switches a transmission path of the information to the encrypting/decrypting device in response to one of the operations performed by the encrypting/decrypting device.

Information processor and information processing method

The encoding rate controlling apparatus () is provided with a controlling device () for performing a control for the encoding rate by changing a quantization scale code for quantizing the dynamic image information, and for conversing an average value of the encoding rate through all of the dynamic image information to an average value corresponding to a predetermined average value. The controlling device establishes on a time axis a plurality of change timings, each of which is a timing when the quantization scale code is changed, calculates the average value of the encoding rate corresponding to each of the established change timings, and performs the control for the encoding rate on the basis of the calculated average value. An information encoding apparatus (S) has the encoding rate controlling apparatus, a quantizing device () for quantizing the dynamic image information by using the changed quantization scale code, and an encoding device () for variable-length-encoding the quantized dynamic image information.

Encoding rate controlling apparatus and information encoding apparatus

An information recording apparatus including an information reproduction unit for reading data recorded in a recording/reproducing medium; a decoder for decoding the data recorded in the recording/reproducing medium based on a signal from the information reproduction unit; a digital video compression unit for encoding the signal decoded by the decoder; and an information recording unit for recording the data encoded by the digital video compression unit into a recording/reproducing medium. The decoder is controlled to continuously decode the data recorded in the recording/reproducing medium including a portion erased by edition, and the digital video compression unit is controlled to discontinue the encoding of the signal in accordance with the portion erased by the edition.

Information recording apparatus and information recording method

The encoding rate controlling apparatus ( ) is provided with a controlling device ( ) for performing a control for the encoding rate by changing a quantization scale code for quantizing the dynamic image information, and for converging an average value of the encoding rate through all of the dynamic image information to an average value corresponding to a predetermined average value. The controlling device establishes on a time axis a plurality of change timings, each of which is a timing when the quantization scale code is changed, calculates the average value of the encoding rate corresponding to each of the established change timings, and performs the control for the encoding rate on the basis of the calculated average value. An information encoding apparatus (S) has the encoding rate controlling apparatus, a quantizing device ( ) for quantizing the dynamic image information by using the changed quantization scale code, and an encoding device ( ) for variable-length-encoding the quantized dynamic image information.

An fade detection device detects fade transitions in a image data signal used for image data compression provided with: an inter-frame difference calculation device calculates the absolute value of the difference at each pixel between two frames, and the sum of the absolute values at all pixels of one frame; a pixel block detection device calculates the absolute value of the difference at each pixel between two pixel blocks, each of which is subdivided from one frame, and detecting a pair of blocks to obtain the minimum value for the sum total of the absolute values at all pixels of one block; an predictive difference calculation device calculates the one frame total of said sum total of the absolute values at all pixels of one block in each pair of blocks detected by said pixel block detection device; a judging device judges whether said fade transitions is generated or not, using said sum total of the absolute values at all pixels of one frame and the one frame total.

Growing community of inventors

Tokorozawa, Japan

Yasuyuki Umehara