Emergency messages in watermarks

Patent metadata

Field	Value
Publication number	US-11102499-B2
Application number	US-201716083550-A
Country	US
Kind code	B2
Filing date	Mar 17, 2017
Priority date	Mar 17, 2016
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A device may be configured to signal information using watermarks. A device may be configured to determine a watermark message identifier. A device may be configured to receive a multimedia signal, parse a watermark message identifier, and receive fragment characteristic information in response to the value of the watermark identifier.

First claim

The invention claimed is:

1. A method for receiving a watermark message, said watermark message containing at least one watermark message block, comprising the steps of:
(a) receiving said at least one watermark message block;
(b) determining a watermark message id from at least one of said at least one watermark message block;
(c) determining a fragment characteristic information for each of said at least one watermark message block, wherein a length of said fragment characteristic information is based upon on a value of said watermark message id;
(d) recovering said watermark message from said at least one watermark message block based upon said fragment characteristic information.

2. The method of claim 1 where said fragment characteristic information contains a fragment number that specifies an ordering of said at least one watermark message block.

3. The method of claim 1 where said fragment characteristic information contains a last fragment field that specifies a number of said at least one watermark message block in said watermark message.

4. The method of claim 1 where said length of said fragment characteristic information is 4 bits for a first watermark message id and a length of the fragment characteristic information is 20 bits for a second watermark message id.

5. A method for receiving a watermark message, said watermark message containing at least one watermark message block, comprising the steps of:
(a) receiving said at least one watermark message block;
(b) determining a watermark message id from at least one of said watermark message block;
(c) determining if a fragment characteristic information is present for each of said at least one of said watermark message block, wherein said determining if a fragment characteristic information is present depends on a value of said watermark message id;
(d) recovering said watermark message from said at least one watermark message block based upon said fragment characteristic information.

6. The method of claim 5 where said fragment characteristic information is a reserved field value.

7. A device that includes a processor configured to receive a watermark message, said watermark message containing at least one watermark message block, comprising:
(a) said device receiving said at least one watermark message block;
(b) said device determining a watermark message id from at least one of said at least one watermark message block;
(c) said device determining a fragment characteristic information for each of said at least one watermark message block, wherein a length of said fragment characteristic information is based upon on a value of said watermark message id;
(d) said device recovering said watermark message from said at least one watermark message block based upon said fragment characteristic information.

8. The device of claim 7 where said fragment characteristic information contains a fragment number that specifies an ordering of said at least one watermark message block.

9. The device of claim 7 where said fragment characteristic information contains a last fragment field that specifies a number of said at least one watermark message block in said watermark message.

10. The device of claim 7 where said length of said fragment characteristic information is 4 bits for a first watermark message id and a length of the fragment characteristic information is 20 bits for a second watermark message id.

11. A device that includes a processor configured to receive a watermark message, said watermark message containing at least one watermark message block, comprising:
(a) said device receiving said at least one watermark message block;
(b) said device determining a watermark message id from at least one of said watermark message block;
(c) said device determining if a fragment characteristic information is present for each of said at least one of said watermark message block, wherein said determining if a fragment characteristic information is present depends on a value of said watermark message id;
(d) said device recovering said watermark message from said at least one watermark message block based upon said fragment characteristic information.

12. The device of claim 11 where said fragment characteristic information is a reserved field value.

Assignees

• Sharp Kk

Inventors

• Misra Kiran
• Deshpande Sachin G
• Ng Sheau

Classifications

• H04N21/814 Primary

  comprising emergency warnings (arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895) · CPC title

• H04N19/467 Primary

  characterised by the embedded information being invisible, e.g. watermarking · CPC title

• H04N21/4353

  involving decryption of additional data (arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23) · CPC title

• H04N21/4882

  for displaying messages, e.g. warnings, reminders (arrangements for providing short real-time information to substation in data switching networks H04L12/1895) · CPC title

• H04N21/4627

  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)} · CPC title