Owner Microsoft Corporation

Inventors Kaneko, Masahiko

Agent Davies Collison Cave

Pub. Number AU-B-2003200716

Priority 10330422 26.12.02 US

Filing date 27 February 2003

Wipo publication date 15 July 2004

Acceptance publication date 12 February 2009

G09B 21/00 (2006.01) Teaching, or communicating with, the blind, deaf or mute

G03B 31/04 (2006.01) Special techniques

G06F 9/30 (2006.01) Arrangements for programme control, e.g. control unit - Arrangements for executing machine- instructions, e.g. instruction decode

G06F 11/00 (2006.01) Error detection

G06F 13/18 (2006.01) Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units

G06F 13/38 (2006.01) Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units - Information transfer, e.g. on bus

G06F 17/50 (2006.01) Digital computing or data processing equipment or methods, specially adapted for specific functions - Computer-aided design

G06T 13/00 (2006.01) Animation effects in two dimensional (2D) images, e.g. using sprites

H04L 12/16 (2006.01) Data switching networks - Arrangements for providing special services to substations

H04N 5/06 (2006.01) Details of television systems - Generation of synchronising signals

H04N 5/445 (2006.01) Details of television systems - for displaying additional information

H04N 5/93 (2006.01) Details of television systems - Regeneration of the television signal or of selected parts thereof

H04N 7/025 (2006.01) Television systems - Systems for transmission of digital non-picture data, e.g. of text during the active part of a television frame

H04N 7/08 (2006.01) Television systems - Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band

H04N 7/16 (2006.01) Television systems - Secrecy systems