Location History:
- Kanagawa, JP (1995)
- Kawasaki, JP (1993 - 2000)
- Tokyo, JP (1987 - 2001)
Company Filing History:
Years Active: 1987-2001
Title: Keiji Ishizuka: Innovator in Decoding and Coding Technologies
Introduction
Keiji Ishizuka is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the fields of decoding and coding technologies, holding a total of 13 patents. His work has been instrumental in enhancing the efficiency and speed of data processing.
Latest Patents
One of Ishizuka's latest patents is a decoding apparatus and method. This innovative apparatus efficiently stores information to determine an address value for reading a decoded value from a decoded value memory. It performs decoding processing at high speed while reducing memory capacity. The apparatus includes a first storage for continuously storing decoded values for variable-length codes of the same code length, a second storage for storing an initial address in the first storage, and a third storage for storing offset values between the initial address and addresses for storing decoded values for variable-length codes of respective code lengths. Additionally, it features a first specification unit for specifying a code length of an input variable-length code, a second specification unit for specifying the order of the input variable-length code, and an address generator for generating an address to read a decoded value from the first storage.
Another notable patent is a coding method and apparatus for hierarchically coding an image. This apparatus processes a number of consecutive lines of image data representing pixels of an image. It forms reduced image data based on the entered image data and determines in parallel whether the image data of an object pixel can be predicted from the reduced image data and surrounding pixels. The entered image data are then coded according to the determination result.
Career Highlights
Keiji Ishizuka is currently employed at Canon Kabushiki Kaisha, where he continues to innovate and develop advanced technologies. His work has significantly impacted the efficiency of image processing and data decoding.
Collaborations
Some of his notable coworkers include Toshihiko Ichise and Yuzo Kataoka, who have also contributed to advancements in similar fields.
Conclusion
Keiji Ishizuka's contributions to decoding and coding technologies have established him as a key figure in the industry. His innovative patents reflect his commitment to enhancing data processing efficiency and speed.