6 results about "Copying" patented technology

A copy control technique using digital watermark information, which makes it possible to prevent a content from being erroneously subjected to a copy control process according to wrong copy control information at a content-to-content transition. Copy control information in the form of digital watermark information (WM) is embedded in a content to control copying of the content in accordance with the embedded copy control information. A content-to-content transition is detected by detecting a change in a content state, such as a change in image luminance, or a change in copy control information associated with a content, or is detected on the basis of a flag, a descriptor, or channel switching. In response to detection of a content-to-content transition, a reset signal is output to a WM analyzer to reset current copy control information into a “undefined” state, so that copy control is performed in a mode such as a copy-free mode assigned to the “undefined” state.

The invention relates to a fiber reinforced ceramic-based composite material antenna cover for a wave band W and a preparation method thereof. The fiber reinforced ceramic-based composite material antenna cover is a product prepared from a quartz fiber perform by pre-sizing with a copying-locating tool, repeated and circular soaking and drying, repeated and circular soaking after rough machining,drying thermal treatment, circular soaking of a silica solution after finish machining, and ceramic thermal treatment molding. The quart fiber enhanced silicon dioxide composite material is taken as the raw material. The antenna cover is applied to a wave band W. The antenna cover has high mechanical, thermal and electric performance and high appearance quality, is 2 to 3mm in thickness, passes awave-transmitting performance test on the wave band W, has a wave-transmitting rate of larger than 60 percent, passes static test examination, meets the application requirement of the wave band W of the antenna cover, and fills the technical blank of the technical field.

Audio data are read out, via an ATAPI interface, from an audio CD set in a CD drive. Thus, even where an inexpensive low-speed CPU is used, high-speed copying can be performed. When audio data stored on a hard disk are to be reproduced, and if copying authorization/inhibiting information indicates that coping of the audio data should be inhibited, the audio data are output, via a digital audio interface, with a copying-inhibiting subcode imparted to the data. Further, when the audio data stored on the hard disk are written to a CDR media set in the CD drive, the audio data on the hard disk are erased in correspondence with the writing of the digital audio data to the CDR media. With such a copying restricting feature, it is possible to provide a digital-audio-signal recording apparatus that can be properly used as consumer equipment.

The invention discloses a two-dimensional code generation method and system and a document anti-counterfeiting method and system, and the method comprises the following steps: obtaining to-be-stored information, and obtaining a matched two-dimensional code template based on the to-be-stored information; generating first coded data corresponding to the two-dimensional code template based on the to-be-stored information, wherein the first coded data comprises a data code sequence and an error correction code sequence; performing interference processing on the error correction code sequence to obtain a corresponding interference sequence, and the interference sequence comprises a true error correction code and a false error correction code; and generating a corresponding two-dimensional codeon the two-dimensional code template based on the data code sequence and the interference sequence, wherein the two-dimensional code comprises a completely colored first pixel block and a partially colored second pixel block. According to the invention, by interfering the error correction code sequence and combining the design of the second pixel block, the generated two-dimensional code has certain vulnerability, pixels are easier to lose in the copying process, and unreadable copying is realized.

The invention provides a notebook computer with a USB flash drive. A USB interface is formed in the front end of the computer; the USB flash drive can be inserted in the USB interface; a USB flash drive control switch is arranged beside the USB interface; when the computer is used, the switch of the USB flash drive is turned on and the inserted USB flash drive can be used for carrying out data copying; after the copying is finished, the USB flash drive is taken out from the mouse to be used; when the use is finished, the USB flash drive is inserted into the computer again; and when the USB flash disk is not used, the switch is turned off and the USB flash drive does not work.