Method and apparatus for communicating data between two hosts

• US 7,636,805 B2
• Filed: 04/28/2004
• Issued: 12/22/2009
• Est. Priority Date: 10/20/2003
• Status: Expired due to Fees

• Current Assignee: Logitech Europe S A (Logitech International SA)
• Original Assignee: Logitech Europe S A (Logitech International SA)
• Inventors: Rosenberg, Aron
• Primary Examiner(s): Sorrell; Eron J
• Application Number:
  US10/833,363
• Publication Number:
  US 20050086358A1
• Time in Patent Office: 2,064 Days
• Field of Search: None
• US Class Current: 710/72
• CPC Class Codes: H04L 61/2553 Binding renewal aspects, e.g. using keep-alive messages
• CPC Class Codes: H04L 61/256 NAT traversal
• CPC Class Codes: H04L 61/2564 for a higher-layer protocol, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 61/2578 without involvement of the NAT server
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 65/403 Arrangements for multi-party communication, e.g. for conferences data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15
• CPC Class Codes: H04N 7/15 Conference systems

Abstract

A method for communicating video data between a first host and a second host. The method may comprise encoding a video signal producing an encoded video signal at the first host. The method may also comprise transmitting, by the first host, the encoded video signal to the second host. The encoding and transmitting may both be performed by a first single multimedia thread of execution associated with an operating system at the first host. Other embodiments are also disclosed.

Claims

1. A method for communicating video-conference communication data between a first host and a second host, comprising:

at the first host, encoding at least a portion of the video-conference communication data producing a first encoded video-conference signal;

transmitting, by the first host, the first encoded video-conference signal to the second host for processing and display at the second host, wherein encoding and transmitting are both performed by a first single multimedia thread of execution of an operating system at the first host;

at the first host, receiving a second encoded video-conference signal from the second host; and

decoding, by the first host, the second encoded video-conference signal producing a decoded video-conference signal, wherein decoding and receiving are both performed by a second single thread of execution separate from the first single multimedia thread of execution, at the first host,

wherein the first single multimedia thread is single-threaded to only perform encoding and transmission functionality of the first host, and

wherein the first host is dual threaded such that latency in the first host is minimized.

2. The method according to claim 1, wherein the method comprises performing a callback, by the first single multimedia thread, to perform encoding and transmitting.

3. The method according to claim 1, wherein the second single thread of execution is a second single multimedia thread of an operating system of the first host, and wherein the method comprises performing a callback, by the second single multimedia thread, to perform decoding and receiving.

4. The method according to claim 1, further comprising:

sending an audio signal to the second host independently from transmitting the first encoded video-conference signal to the second host, the audio signal comprising at least a second portion of the video-conference communication data.

5. A system for communicating video-conference communication data over a data path between a first host and a second host comprising:

in the first host, a processor executing a software program performing the method of claim 1.

6. The system according to claim 5, wherein the method comprises performing a callback, by the first single multimedia thread, to perform encoding and transmitting.

7. The system according to claim 5, wherein the second single thread of execution is a second single multimedia thread of an operating system of the first host, and wherein the method comprises performing a callback, by the second single multimedia thread, to perform decoding and receiving.

8. The system according to claim 5, further comprising:

an audio signal path connecting the first host and the second host, independent of the data path.

9. A computer-readable medium having stored thereon a plurality of machine instructions for controlling at least one system to perform a method, the method comprising:

at a first host, encoding at least a portion of the video-conference communication data producing a first encoded video-conference signal;

transmitting, by the first host, the first encoded video-conference signal to a second host for processing and display at the second host, wherein encoding and transmitting are both performed by a first single multimedia thread of execution of an operating system at the first host;

at the first host, receiving a second encoded video-conference signal from the second host; and

decoding, by the first host, the second encoded video-conference signal producing a decoded video-conference signal, wherein decoding and receiving are both performed by a second single thread of execution separate from the first single multimedia thread of execution, at the first host,

wherein the first single multimedia thread is single-threaded to only perform encoding and transmission functionality of the first host, and

wherein the first host is dual threaded such that latency in the first host is minimized.

10. The computer-readable medium of claim 9, wherein the method comprises performing a callback, by the first single multimedia thread, to perform encoding and transmitting.

11. The computer-readable medium of claim 9, the method further comprising:

wherein the second single thread of execution is a second single multimedia thread of an operating system of the first host, and wherein the method comprises performing a callback, by the second single multimedia thread, to perform decoding and receiving.

12. The computer-readable medium of claim 9, the method further comprising:

sending an audio signal to the second host independently from transmitting the first encoded video-conference signal to the second host, the audio signal comprising at least a second portion of the video-conference communication data.