Method and system automatically forwarding snapshots created from a compressed digital video stream

• US 6,139,197 A
• Filed: 03/04/1997
• Issued: 10/31/2000
• Est. Priority Date: 03/04/1997
• Status: Expired due to Term

• Current Assignee: Kingfisher.Net, Inc.
• Original Assignee: Seeitfirst.Com, Inc.
• Inventors: Banks, Jerry J.
• Primary Examiner(s): Flynn, Nathan
• Assistant Examiner(s): Srivastavia, Vivek
• Application Number:
  US08/812,985
• Time in Patent Office: 1,337 Days
• Field of Search: 348/13, 348/12, 348/7, 348/6, 348/10, 348/390, 455/5.1, 455/4.2, 455/3.1
• US Class Current: 709/217
• CPC Class Codes: H04N 1/00283 with a television apparatus
• CPC Class Codes: H04N 1/00299 with a television transmission apparatus, e.g. a videophone, a teletext system or a digital television system
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/234381 by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
• CPC Class Codes: H04N 21/2387 Stream processing in response to a playback request from an end-user, e.g. for trick-play
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/6377 directed to server one-way streaming services wherein the source is controlled by the destination H04L65/613
• CPC Class Codes: H04N 21/658 Transmission by the client directed to the server
• CPC Class Codes: H04N 21/6587 Control parameters, e.g. trick play commands, viewpoint selection
• CPC Class Codes: H04N 21/8153 comprising still images, e.g. texture, background image
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

A method and system are provided for delivering video from a server to a client over a communication medium with a limited bandwidth. An initial image quality that allows the video to be displayed in real time at the client is determined based on a predetermined frame rate and the limited bandwidth. Video having the initial image quality is transmitted to the client. The client sends to the server a snapshot request that specifies both an image in the video and a destination. In response to the request, the server generates a digital representation of the image that has a higher quality than the initial image quality. The server transmits the snapshot to the specified destination. The specified destination may be a destination other than the client, such as an image processing facility, thereby allowing the client to log off without waiting for delivery of the snapshot.

Claims

1. A method for delivering video from a server to a client over a communication medium with a limited bandwidth, the method comprising the steps of:

transmitting video having an initial image quality from said server to said client;

receiving from said client at said server a message that includes image identification data and destination identification data, wherein said image identification data identifies an image that is represented in said video, wherein said destination identification data identifies a destination other than said client and other than said server;

in response to said message, causing said server to perform the steps of

generating a digital representation of the image identified by said image identification data, wherein said digital representation has an image quality that is higher than said initial image quality; and

transmitting said digital representation from said server to said destination identified by said destination identification data.

2. The method of claim 1 wherein the step of transmitting said digital representation from said server to said destination comprises the step of transmitting said digital representation from said server to an image processing facility.

3. The method of claim 1 wherein:

said destination identification data identifies a plurality of destinations; and

the step of transmitting said digital representation from said server to said destination comprises the step of transmitting said digital representation to said plurality of destinations.

4. The method of claim 3 wherein:

the plurality of destinations includes a first destination and a second destination;

the message specifies a first image quality for said first destination and a second image quality for said second destination;

the step of generating a digital representation of the image identified by said image identification data includes generating a first digital representation that has said first image quality and a second digital representation that has said second image quality; and

the step of transmitting said digital representation to said plurality of destinations includes the steps of transmitting said first digital representation to said first destination and transmitting said second digital representation to said second destination.

5. The method of claim 1 wherein:

the step of receiving from said client at said server a message includes the step of receiving the message over a first network system; and

the step of transmitting said digital representation from said server to said destination includes the step of transmitting the digital representation over a second network system that is different from said first network system.

6. The method of claim 5 wherein the step of transmitting the digital representation over a second network system includes transmitting the digital representation over a point-to-point connection.

13. The method of claim 1, wherein the step of generating the digital representation comprises the steps of:

identifying a video file that contains images that are of higher image quality than said initial image quality; and

extracting a particular image from the video file based on the image identified by the image identification data.

15. The method of claim 1, wherein the step of receiving from said client at said server a message is performed after transmitting from said server a portion of said video that includes said image initial quality.

7. A computer-readable medium having stored thereon sequences of instructions for delivering video from a server to a client over a communication medium with a limited bandwidth, the sequences of instructions comprising sequences of instructions for performing the steps of:

transmitting video having an initial image quality from said server to said client;

receiving from said client at said server a message that includes image identification data and destination identification data, wherein said image identification data identifies an image that is represented in said video, wherein said destination identification data identifies a destination other than said client and other than said server;

in response to said message, causing said server to perform the steps of

generating a digital representation of the image identified by said image identification data, wherein said digital representation has an image quality that is higher than said initial image quality; and

transmitting said digital representation from said server to said destination identified by said destination identification data.

8. The computer-readable medium of claim 7 wherein the step of transmitting said digital representation from said server to said destination comprises the step of transmitting said digital representation from said server to an image processing facility.

9. The computer-readable medium of claim 7 wherein:

said destination identification data identifies a plurality of destinations; and

the step of transmitting said digital representation from said server to said destination comprises the step of transmitting said digital representation to said plurality of destinations.

10. The computer-readable medium of claim 9 wherein:

the plurality of destinations includes a first destination and a second destination;

the message specifies a first image quality for said first destination and a second image quality for said second destination;

the step of generating a digital representation of the image identified by said image identification data includes generating a first digital representation that has said first image quality and a second digital representation that has said second image quality; and

the step of transmitting said digital representation to said plurality of destinations includes the steps of transmitting said first digital representation to said first destination and transmitting said second digital representation to said second destination.

11. The computer-readable medium of claim 7 wherein:

the step of receiving from said client at said server a message includes the step of receiving the message over a first network system; and

the step of transmitting said digital representation from said server to said destination includes the step of transmitting the digital representation over a second network system that is different from said first network system.

12. The computer-readable medium of claim 11 wherein the step of transmitting the digital representation over a second network system includes transmitting the digital representation over a point-to-point connection.

14. The computer-readable medium of claim 7, wherein the step of generating the digital representation comprises the steps of:

identifying a video file that contains images that are of higher image quality than said initial image quality; and

extracting a particular image from the video file based on the image identified by the image identification data.

16. The computer-readable medium of claim 7, wherein the step of receiving from said client at said server a message is performed after transmitting from server a portion of said video that includes said image at said initial quality.