06400407 is referenced by 251 patents.

A method and apparatus for communicating logical addresses within a broadcast television signal are provided. According to one aspect of the present invention, a logical address of a resource, e.g., a Uniform Resource Locator (URL), may be communicated to a receiving device, such as a set-top box, by way of a data service channel of a video signal. A sequence of data complying with a predetermined syntax and including the logical address is embedded in either a text service channel (e.g., T

1

, T

2

, T

3

, T

4

) or a captioning service channel (e.g., CC

1

, CC

2

, CC

3

, CC

4

) of the vertical blanking interval (VBI) of the video signal. According to another aspect of the present invention, a logical address of a resource may be received by way of a data service channel of a video signal. A video signal including data associated with one or more data services is received. Subsequently, a sequence of data complying with a predetermined syntax is retrieved from either a captioning service or a text service. Ultimately, a logical address may be extracted from the video signal by parsing the sequence of data. importantly, features of the present invention are applicable to many broadcast television (TV) systems including National Television Standards Committee (NTSC), Phase Alternate Lines (PAL), and Sequential Couleur Avec Memoire (SECAM) as well as the proposed High Definition Television (HDTV) standard. Further, the present invention is transport-independent thereby allowing a variety of transport mechanisms, such as analog cable, digital satellite, digital TV, cable TV and others, to be employed.

Title
Communicating logical addresses of resources in a data service channel of a video signal
Application Number
9/99118
Publication Number
6400407 (B1)
Application Date
June 17, 1998
Publication Date
June 4, 2002
Inventor
Phillip Goldman
Los Altos
CA, US
William M Gillon
Daly City
CA, US
Dean Blackketter
San Francisco
CA, US
Daniel J Zigmond
San Francisco
CA, US
Agent
Workman Nydegger Seeley
US
Assignee
WebTV Networks
CA, US
IPC
H04N 7/08
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