System and method for distribution of encoded video data

• US 6,078,350 A
• Filed: 12/01/1997
• Issued: 06/20/2000
• Est. Priority Date: 02/19/1992
• Status: Expired due to Term

• Current Assignee: 8X8, Inc.
• Original Assignee: 8X8, Inc.
• Inventors: Davis, Oran
• Primary Examiner(s): Kuntz, Curtis A.
• Assistant Examiner(s): Ramakrishnaiah, Melur
• Application Number:
  US08/980,915
• Time in Patent Office: 932 Days
• Field of Search: 348/14, 348/15, 348/16, 348/17, 379/93.28, 379/93.29, 379/93.31, 379/100.13, 379/93.15, 379/90.01, 379/93.17, 379/93.21, 379/93.08
• US Class Current: 348/14.08
• CPC Class Codes: G06T 9/007 Transform coding, e.g. discrete cosine transform
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 7/141 between two video terminals, e.g. videophone telephonic communication systems combined with television receiver for reception of entertainment or information matter H04M11/085
• CPC Class Codes: H04N 7/15 Conference systems

Abstract

A video conferencing arrangement that includes paired and configurable one-way translators. Each one-way translator is configurable to translate encoded video data from a first format to a second format, and are inter-coupled with a switch arrangement. Because each translator is configurable, a one-way translator can translate encoded video data from one of various formats to another format. Because each translator only translates from a first format to a second format, and not from the second format to the first format, conventional hardware and software can be used to save costs.

Claims

1. A system for transmitting encoded video data between a first video conferencing terminal and a second video conferencing terminal, the first video conferencing terminal compatible with a first format of encoded video data, and the second video conferencing terminal compatible with a second format of encoded video data, comprising:

a first node configured and arranged to couple to the first video conferencing terminal and including

a first decoder configured and arranged to receive encoded video data of the first format from the first video conferencing terminal and decode the video data; and

a first encoder coupled to the first decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the second format;

a second node configured and arranged to couple to the second video conferencing terminal and including

a second decoder configured and arranged to receive encoded video data of the second format from the second video conferencing terminal and decode the video data; and

a second encoder coupled to the second decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the first format; and

a switch circuit arrangement coupled to the first and second nodes by communications lines provided by a public switch telephone line provider, wherein the first node is arranged to provide encoded video data of the first format from the second node to the first video conferencing terminal, and the second node is arranged to provide encoded video data of the second format from the first node to the second video conferencing terminal.

2. The system of claim 1, wherein the first node and second node are arranged to couple to a public switch telephone network.

3. The system of claim 1, wherein the switch circuit arrangement is a computer system.

4. The system of claim 3, wherein the first encoder and the second encoder are configurable with software from switch circuit arrangement to encode video data in one of a plurality of formats.

5. A system, according to claim 4, wherein each of the plurality of formats is a distinct industry-accepted video communications format.

6. A system, according to claim 1, wherein the switch circuit arrangement is respectively coupled to the first and second nodes by communications lines provided by a public switch telephone network.

7. A system, according to claim 1, further including a first video telephone set having a processor arrangement adapted to include the first decoder and first encoder of the first node, and further including a second video telephone set having a processor arrangement adapted to include the second decoder and second encoder of the second node.

8. An apparatus for transmitting encoded video data between a first video conferencing terminal and a second video conferencing terminal, the first video conferencing terminal compatible with a first format of encoded video data, and the second video conferencing terminal compatible with a second format of encoded video data, comprising:

a first one-way translator including

first means for decoding encoded video data of the first format from the first video conferencing terminal,

first means for encoding in the second format video data from the first means for decoding step, and

first means for transmitting video data of the second format provided by the first means for encoding to a second translator;

the second translator, including

second means for decoding encoded video data of the second format from the second video conferencing terminal;

second means for encoding in the first format video data from the second means for decoding; and

second means for transmitting video data of the first format provided by the second means for encoding to the first translator;

means for providing encoded video data of the first format received from the second translator to the first video conferencing terminal;

means for providing encoded video data of the second format received from the first translator to the second video conferencing terminal; and

means for communicatively coupling the first video conferencing terminal with the second video conferencing terminal without an intervening arrangement decoding and encoding video data.

9. A telephone set including the apparatus of claim 8, and further including a processor arrangement adapted to include the first one-way translator.

10. A system for transmitting encoded video data between a first video conferencing terminal and a second video conferencing terminal, the first video conferencing terminal compatible with a first format of encoded video data, and the second video conferencing terminal compatible with a second format of encoded video data, comprising:

a first node configured and arranged to couple to the first video conferencing terminal and including

a first decoder configured and arranged to receive encoded video data of the first format from the first video conferencing terminal and decode the video data; and

a first encoder coupled to the first decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the second format;

a second node configured and arranged to couple to the second video conferencing terminal and including

a second decoder configured and arranged to receive encoded video data of the second format from the second video conferencing terminal and decode the video data; and

a second encoder coupled to the second decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the first format; and

a switch circuit arrangement coupled to the first node and coupled to the second node, wherein the first node is arranged to provide encoded video data of the first format from the second node to the first video conferencing terminal, and the second node is arranged to provide encoded video data of the second format from the first node to the second video conferencing terminal; and

wherein the first video conferencing terminal and the first node are co-located at a first station, the second video conferencing terminal and the second node are co-located at a second station, and wherein the first and second stations are communicatively coupled to one another via a communications line.

11. A method for transmitting encoded video data between a first video conferencing terminal and a second video conferencing terminal, the first video conferencing terminal compatible with a first format of encoded video data, and the second video conferencing terminal compatible with a second format of encoded video data, comprising the steps of:

in a first one-way translator, performing steps (a)-(c);

(a) decoding encoded video data of the first format from the first video conferencing terminal;

(b) encoding in the second format video data from the decoding step (a); and

(c) transmitting video data of the second format provided by the encoding step (b) to a second translator;

in the second translator, performing steps (d)-(f);

(d) decoding encoded video data of the second format from the second video conferencing terminal;

(e) encoding in the first format video data from the decoding step (d); and

(f) transmitting video data of the first format provided by the encoding step (e) to the first translator;

providing encoded video data of the first format received from the second translator to the first video conferencing terminal; and

providing encoded video data of the second format received from the first translator to the second video conferencing terminal; and

communicatively coupling the first video conferencing terminal with the second video conferencing terminal without an intervening arrangement decoding and encoding video data.

12. A system for transmitting encoded video data between a first video conferencing terminal and a second video conferencing terminal, the first video conferencing terminal compatible with a first format of encoded video data, and the second video conferencing terminal compatible with a second format of encoded video data, comprising:

a first node configured and arranged to couple to the first video conferencing terminal and including

a first decoder configured and arranged to receive encoded video data of the first format from the first video conferencing terminal and decode the video data; and

a first encoder coupled to the first decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the second format;

a second node configured and arranged to couple to the second video conferencing terminal and including

a second decoder configured and arranged to receive encoded video data of the second format from the second video conferencing terminal and decode the video data; and

a second encoder coupled to the second decoder and configured and arranged to receive decoded video data from the decoder and encode the decoded video data in the first format; and

a switch circuit arrangement coupled to the first and second by a POTS communications channel, wherein the first node is arranged to provide encoded video data of the first format from the second node to the first video conferencing terminal, and the second node is arranged to provide encoded video data of the second format from the first node to the second video conferencing terminal.