Digital information recording-reproducing apparatus

• US 7,197,232 B2
• Filed: 08/31/2004
• Issued: 03/27/2007
• Est. Priority Date: 06/07/1993
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Hitachi, Ltd.
• Inventors: Yamazaki, Shigeru, Okamoto, Hiroo, Noguchi, Takaharu, Arai, Takao, Amada, Nobutaka
• Primary Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US10/929,433
• Publication Number:
  US 20050025464A1
• Time in Patent Office: 938 Days
• Field of Search: 386/46, 386/94, 386/95, 386/83
• US Class Current: 386/257
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00188 involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00557 wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas
• CPC Class Codes: G11B 20/00695 said measures preventing that data are read from the recording medium
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/3036 Time code signal
• CPC Class Codes: G11B 5/00813 magnetic tapes
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/78263 for recording on tracks inclined relative to the direction of movement of the tape
• CPC Class Codes: H04N 5/919 by dividing samples or signal segments, e.g. television lines, among a plurality of recording channels
• CPC Class Codes: H04N 5/9201 involving the multiplexing of an additional signal and the video signal
• CPC Class Codes: H04N 5/9261 involving data reduction
• CPC Class Codes: H04N 5/9265 with processing of the sound signal

Abstract

A digital information recording-reproducing apparatus for recording a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.

Claims

1. A digital information recording-reproducing apparatus which records and reproduces a digital information signal transmitted together with additional information, comprising:

a discriminator which discriminates a type of the digital information signal based on the additional information;

a recorder which generates control information to be used for reproduction control based on the additional information, adds the control information to the digital information signal, and records the digital information signal having the control information added thereto;

a reproducer which reproduces the digital information signal recorded by said recorder; and

a controller which controls reproduction based on the control information;

wherein, when the discriminator discriminates the type of the digital information signal as being a specific type, the reproducer reproduces the digital information signal only when a time more than a predetermined time does not elapse from the time and date at which the digital information signal is recorded by the recorder.

2. A digital information recording-reproducing apparatus

according to claim 1, wherein the recorded digital information signal is an encrypted digital information signal, and wherein, when the type of the recorded digital information signal is the specific type, said reproducer decrypts the encrypted digital information signal.

3. A digital information recording-reproducing apparatus which records and reproduces a digital information signal transmitted together with additional information, comprising:

a discriminator which discriminates a type of the digital information signal based on the additional information;

a recorder which generates control information to be used for reproduction control based on the additional information, adds the control information to the digital information signal, and records the digital information signal having the control information added thereto;

a reproducer which reproduces the digital information signal recorded by the recorder; and

a controller which controls reproduction based on the control information;

wherein, when the type of the digital information signal is the specific type, the reproducer inhibits reproduction of the recorded digital information signal when the recorded digital information signal was not recorded by the recorder; and

wherein, when the type of the digital information signal is the specific type, the reproducer inhibits reproduction of the recorded digital information signal when a time more than a predetermined time elapses from the time and date at which the digital information signal is recorded by the recorder, even if the recorded digital information signal was recorded by the recorder.

4. A digital information recording-reproducing method, comprising the steps of:

receiving a digital information signal transmitted together with additional information;

recording the received digital information signal on a recording medium; and

when the type of the digital information signal included in the additional information is a specific type of digital information signal, permitting reproduction of the recorded digital information signal only by an apparatus by which the recorded digital information signal was recorded, when a time more than a predetermined time does not elapse from the time and date at which the digital information signal is recorded by the apparatus.

5. A digital information recording-reproducing method according to claim 4, wherein the recorded digital information signal is an encrypted digital information signal, and wherein, when the type of the recorded digital information signal is the specific type and when the reproduction of the recorded digital information signal is permitted, the encrypted digital information signal is decrypted.

6. A digital information recording-reproducing method, comprising the steps of:

receiving a digital information signal transmitted together with additional information;

recording the received digital information signal on a recording medium; and

reproducing the digital information signal recorded on the recording medium;

wherein, when the type of the digital information signal included in the additional information is the specific type, the step of reproducing inhibits reproduction of the recorded digital information signal by an apparatus other than an apparatus by which the digital information signal was recorded; and

wherein the step of reproducing inhibits reproduction of the recorded digital information signal when a time more than a predetermined time elapses from the time and date at which the digital information signal is recorded, even if the recorded digital information signal is reproduced by the apparatus by which the digital information signal was recorded.

7. A digital information signal transmitting method which transmits a digital information signal to a recording-reproducing apparatus for recording and reproducing the digital information signal, comprising steps:

adding an additional information to the digital information signal; and

transmitting the digital information signal to which the additional information is added into a transmission channel;

wherein, when a type of the digital information signal including the additional information is a specific type of digital information signal, the additional information is information for controlling to permit reproduction of the digital information signal only when a time more than a predetermined time does not elapse from the time and date at which the digital information signal is recorded and when the recorded digital information signal is reproduced by the apparatus by which the digital information signal is recorded.

8. A digital information transmitting method according to claim 7, wherein the transmitted digital information signal is an encrypted digital information signal, and wherein the additional information is information for decrypting the encrypted digital information signal when the type of the recorded digital information signal is the specific type.