# US 5,703,859 A · Digital video copy protection system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,703,859 A - Document ID: US5703859A - Status: Granted - Kind: A - Application number: 08/705,306 - Filed: 1996-08-29 - Granted: 1997-12-30 - Earliest claimed: 1995-09-01 - Assignees: Sony Corporation - Inventors: Katsumi Tahara; Hideki Koyanagi; Yoichi Yagasaki; Yasushi Fujinami - Web page: https://patentgrep.com/patent/US5703859A ## CPC - H04N 1/32149: {Methods relating to embedding, encoding, decoding, detection or retrieval operations} - H04N 5/913: for scrambling {; for copy protection} - H04N 21/2541: {Rights Management (protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08)} - H04N 21/4334: {Recording operations (recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27)} - H04N 21/4627: Rights management {associated to the content (security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08)} - H04N 21/835: Generation of protective data, e.g. certificates {(protecting software against unauthorised usage in a vending or licensing environment G06F21/10)} - H04N 21/8355: involving usage data, e.g. number of copies or viewings allowed - H04N 21/8358: involving watermark {(protecting executable software by watermarking G06F21/16; image watermarking in general G06T1/0021; watermarks inserted in still images for transmission purposes H04N1/32144; inserting watermarks during video coding H04N19/467)} - H04N 5/9264: {using transform coding} - H04N 2005/91321: {the copy protection signal being a copy protection control signal, e.g. a record inhibit signal} - H04N 2005/91328: {the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]} - H04N 2005/91335: {the copy protection signal being a watermark} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A formatting apparatus authenticates an information signal prior to mass duplication of the signal by analyzing the signal to detect the presence or absence of a security signal therein, inserting a security signal into the information signal, and recording the modified signal only if no security signal was detected. ## Claims ### Claim 1 A formatting apparatus for the authentication and mass duplication of an information signal recorded on a storage medium, said apparatus comprising: first receiving means for receiving said information signal; second receiving means for receiving a key signal; key signal detection means, coupled to said first receiving means and to said second receiving means, for analyzing said information signal to detect whether or not a copy of said key signal is present in said information signal; key insertion means, coupled to said first receiving means and to said second receiving means, responsive to the detection by said key signal detection means that a copy of said key signal is not present in said information signal for selectively inserting into a portion of said information signal not normally allocated for copy protection information a copy of said key signal to produce a modified information signal; recording means, coupled to said key signal detection means and to said key insertion means, for recording said modified information signal if a copy of said key signal is not detected in said information signal; and means for inhibiting the recording of said information signal if a copy of said key signal is detected in said information signal. ### Claim 2 (depends on 1) Apparatus according to claim 1, wherein said first receiving means receives said information signal from one of a legal master recording and a retail recording. ### Claim 3 (depends on 1) Apparatus according to claim 1, wherein said second receiving means comprises key memory means for storing said key signal. ### Claim 4 (depends on 1) Apparatus according to claim 1, wherein said second receiving means comprises key signal generating means for generating said key signal. ### Claim 5 (depends on 1) Apparatus according to claim 1, wherein said key signal detection means reads and decodes said information signal. ### Claim 6 (depends on 1) Apparatus according to claim 1, wherein said key signal detection means comprises processing means for processing said information signal. ### Claim 7 (depends on 1) Apparatus according to claim 1, wherein said key signal detection means comprises extraction means for extracting a portion of said information signal. ### Claim 8 (depends on 1) Apparatus according to claim 1, wherein said key insertion means inserts a copy of said key signal into a fixed length code in said information signal. ### Claim 9 (depends on 1) Apparatus according to claim 1, wherein said key insertion means inserts a copy of said key signal into an area defined for a user data in said information signal. ### Claim 10 (depends on 1) Apparatus according to claim 1, wherein said key insertion means inserts a copy of said key signal into an area defined for a time code data in said information signal. ### Claim 11 (depends on 1) Apparatus according to claim 1, wherein said key. insertion means inserts a copy of said key signal into an area defined for a SQUANT data in said information signal. ### Claim 12 (depends on 1) Apparatus according to claim 1, wherein said key insertion means inserts a copy of said key signal into an area in said information signal defined for a data representing a high frequency component of a video signal. ### Claim 13 (depends on 1) Apparatus according to claim 1, wherein said key insertion means inserts a copy of said key signal into a QF›7! ›7! data area in said information signal. ### Claim 14 (depends on 1) Apparatus according to claim 1, wherein said recording means comprises means for recording a stamper. ### Claim 15 (depends on 1) Apparatus according to claim 1, wherein said recording means comprises means for mass producing a plurality of optical discs. ### Claim 16 A method for the authentication and mass duplication of an information signal recorded on a storage medium, said method comprising the steps of: receiving said information signal; receiving a key signal; analyzing said information signal to detect whether or not a copy of said key signal is present in said information signal; if a copy of said key signal is not present in said information signal, selectively inserting into a portion of said information signal not normally allocated for copy protection information a copy of said key signal to produce a modified information signal and recording said modified information signal; and if a copy of said key signal is present in said information signal inhibiting the recording of said information signal. ### Claim 17 (depends on 16) Method according to claim 16, wherein said step of receiving said information signal comprises the step of receiving said information signal from one of a legal master recording and a retail recording. ### Claim 18 (depends on 16) Method according to claim 16, wherein said step of receiving a key signal comprises the step of retrieving said key signal from a key memory. ### Claim 19 (depends on 16) Method according to claim 16, wherein said step of receiving a key signal comprises the step of generating said key signal. ### Claim 20 (depends on 16) Method according to claim 16, wherein said step of analyzing comprises the steps of: reading said information signal; and decoding said information signal. ### Claim 21 (depends on 16) Method according to claim 16, wherein said step of analyzing comprises the step of processing said information signal. ### Claim 22 (depends on 16) Method according to claim 16, wherein said step of analyzing comprises the step of extracting a portion of said information signal. ### Claim 23 (depends on 16) Method according to claim 16, wherein said step of inserting comprises the step of inserting a copy of said key signal into a fixed length code in said information signal. ### Claim 24 (depends on 16) Method according to claim 16, wherein of said step of inserting comprises the step of inserting a copy of said key signal into an area defined for a user data in said information signal. ### Claim 25 (depends on 16) Method according to claim 16, wherein said step of inserting comprises the step of inserting a copy of said key signal into an area defined for a time code data in said information signal. ### Claim 26 (depends on 16) Method according to claim 16, wherein said step of inserting comprises the step of inserting a copy of said key signal into an area defined for a SQUANT data in said information signal. ### Claim 27 (depends on 16) Method according to claim 16, wherein said step of inserting comprises the step of inserting a copy of said key signal into an area in said information signal defined for a data representing a high frequency component of a video signal. ### Claim 28 (depends on 16) Method according to claim 16, wherein said step of inserting comprises the step of inserting a copy of said key signal into a QF›7! ›7! data area in said information signal. ### Claim 29 (depends on 16) Method according to claim 16, wherein said step of recording comprises the step of recording a stamper. ### Claim 30 (depends on 16) Method according to claim 16, wherein said step of recording comprises the step of mass producing a plurality of optical discs.