Streaming information appliance with buffer read and write...

Details Streaming information appliance with buffer read and write... Streaming information appliance with buffer read and write...

1999-04-06

2002-04-23

Elmore, Reba I. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S117000, C725S089000

Reexamination Certificate

active

06378035

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to streaming information. More particularly, the present invention relates to recording streaming information and retrieving the stored information for selective playback.
With advances in technology including faster processors, improved graphics, and so forth, a desktop computer can easily receive and present streaming information to the user. Common examples of streaming information include streaming video and audio delivered over a wide area network, such as the Internet. For instance, television broadcast signals that would otherwise be transmitted wirelessly using satellites, television transmitters, etc., are encoded and made available for transmission to remote computer users via the Internet. Upon request by the desktop computer user, the encoded data packets containing audio and video data are sent to the desktop computer user sequentially. Upon receipt, the data packets are decoded and processed by the desktop computer in order to render the streaming information to the user in as close to real time as possible. After rendering or presentation, the data packets are discarded.
Although processing streaming information in the manner described above is useful, there exist a number of shortcomings. Currently, streaming information is provided at the request of each desktop computer. Thus, each user must form a separate connection with the source of streaming information in order to receive the desired streaming information. Once initiated, the user is unable to control the manner in which streaming information is rendered. For instance, the user cannot temporarily “pause” the incoming streaming information in order to perform another task and then resume viewing when desired. Likewise, the user is unable to repeat a previously rendered portion since the data packets are discarded, or skip ahead since the data packets have not been received.
There thus is an ongoing need to improve the manner in which streaming information is rendered. Although described above with respect to a desktop computer and streaming information received from the Internet, the improved process should be applicable to other information appliances or computing devices and other forms of streaming information.
SUMMARY OF THE INVENTION
In one aspect of the present invention, an information appliance receives streaming information and includes a buffer, a writer module, a reader module and a synchronizer. The buffer has a plurality of storage locations, a logical head, a logical tail and a valid data area between the logical head and the logical tail. The logical head and the logical tail move sequentially through the plurality of storage locations in a first logical direction. The writer module has a write position at the logical head of the buffer. The writer module receives the streaming information and writes the streaming information to the buffer at the write position. The reader module is coupled to the buffer and has a first read position which is temporally movable with respect to the write position. The synchronizer is coupled to the writer module and the reader module and maintains the first read position within the valid data area.
Another aspect of the present invention relates to a computer readable medium including instructions readable by an information appliance having a buffer with a fixed number of storage locations. When the instructions are implemented, the instructions cause the information appliance to handle streaming information by defining a logical head and tail in the buffer and a valid data area between the logical head and tail, which includes a portion of the storage locations. The information appliance writes the streaming information to the logical head of the buffer with a writer module. The information appliance moves the logical head and tail through the storage locations in a first logical direction while writing the streaming information. The information appliance reads the streaming information from a first read position within the valid data area with a first reader module, wherein the first read position is temporally movable with respect to the logical head and tail. The information appliance synchronizes the writing and reading of the streaming information.


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