Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium therefor

• US 7,317,738 B2
• Filed: 11/07/2001
• Issued: 01/08/2008
• Est. Priority Date: 09/02/1997
• Status: Expired due to Fees

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Arai, Takao, Yoshiura, Hiroshi, Takeuchi, Toshifumi, Kawamae, Osamu
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): HOANG, THAI D
• Application Number:
  US09/986,087
• Publication Number:
  US 20020048282A1
• Time in Patent Office: 2,253 Days
• Field of Search: 370522-523, 370/528, 369/44.26, 369 47- 48, 369 50- 59, 714746-755
• US Class Current: 370/535
• CPC Class Codes: G06T 1/0071 using multiple or alternating watermarks
• CPC Class Codes: H03M 13/13 Linear codes
• CPC Class Codes: H03M 13/6306 Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy H03M13/3761, H03M13/3769 and H03M13/635 take precedence
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04N 1/32149 Methods relating to embedding, encoding, decoding, detection or retrieval operations
• CPC Class Codes: H04N 1/32288 Multiple embedding, e.g. cocktail embedding, or redundant embedding, e.g. repeating the additional information at a plurality of locations in the image
• CPC Class Codes: H04N 19/467 characterised by the embedded information being invisible, e.g. watermarking
• CPC Class Codes: H04N 2201/3284 for error correction

Abstract

In a data transmission method for information data containing additional information data therewith, comprising, at a transmitter side, following steps:

• • adding error correction codes for correcting error to said additional information data;
  • embedding said additional information data added with said error correction codes into the information data by plural times, repetitively; and
  • transmitting the information data embedded with the repetitive additional information data therein, and comprising, at a receiver side, following steps:
  • receiving the transmitted information data embedded with the repetitive additional information data therein;
  • detecting the repetitive additional information data embedded from said transmitted information data received;
  • determining said additional information data on a basis of a majority rule when receiving said information data; and
  • correcting error with using the error correction codes received and determined when said additional information data contains error(s) therein.

Claims

1. A data receiving method for receiving information data containing additional information data therewith, transmitted by a data transmission method comprising the steps performed at a transmitter side of:

preparing a data frame of said information data into which the additional information data is to be embedded,

embedding said additional information data plural times into said data frame, as an electronic watermark, repetitively and separately in said data frame, and

transmitting said data frame of the information data embedded in said data frame with the repetitive and separate additional information data;

said data receiving method comprising the steps performed at a receiver side of;

receiving the transmitted data frames of information data embedded in said data frame with the repetitive and separate additional information data therein,

detecting the repetitive and separate additional information data embedded in said data frame from said transmitted data frames of information data, and

determining said additional information data based on repetitiveness of the additional information data detected,

wherein said determining step includes a step of;

determining said additional information data based on a majority rule of the repetitive and separate additional information data embedded in said data frame.

2. A data transmission method as claimed in claim 1, wherein said information data includes at least one of video data, audio data and text data.

3. A data transmission method as claimed in claim 1, wherein said information data includes at least one of video data, audio data and text data.

4. An information recording medium for recording data therein, comprising:

information data being reproducible in the form of a data frame; and

additional data embedded, as an electronic watermark by plural times into said information data of said data frame, repetitively and separately in said data frame,

wherein a transmitter side transmits said data frame of the information data embedded in said data frame with the repetitive and separate additional information data,

wherein a receiver side receives the transmitted data frames of information data embedded in said data frame with the repetitive and separate additional information data therein, detects the repetitive and separate additional information data embedded in said data frame from said transmitted data frames of information data, and determines said additional information data based on repetitiveness of the additional information data detected, and

wherein said receiver side determines said additional information data based on a majority rule of the repetitive and separate additional information data embedded in said data frame.

5. An information recording medium as claimed in claim 4, wherein information relating to a repetition number of the embedded additional data is recorded into a part of said information recording medium.