Digital Data Compression in a Cellular Phone
First Claim
1. A method, comprising:
- on a website, allowing users to store profiles that indicate information that is indicative of the hardware within the user'"'"'s cellular phone, wherein one of said items of information represents first hardware for a first user, and another item of information represents second hardware for a second user;
allowing said user to select a video program and to command information indicative of said video program to be sent to said website;
on said website, automatically converting said video program to a compressed format compatible with said hardware, as indicated by the stored profile for the user; and
storing said automatically converted video information and reconverting allowing said automatically converted video information to be sent to at least one of different cellular telephone users.
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Accused Products

Abstract
Video clips are stored and converted on a website into different formats which are compatible with different cellular phones. The source for the video can be sources such as DVDs, other cellular phones, or broadcast television. The system can automatically store profiles from multiple different phones and automatically carry out a conversion based on information stored in the profile.
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Current Assignee
Avago Technologies International Sales Pte Limited
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Original Assignee
OXFORM SEMICONDUCTOR INC.
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Messaging system and method with transcoder filtering of baseline message representations | ||
Patent #
US 20030187930A1
Filed 03/27/2002
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Current Assignee
International Business Machines Corporation
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Original Assignee
International Business Machines Corporation
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14 Claims
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1. A method, comprising:
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on a website, allowing users to store profiles that indicate information that is indicative of the hardware within the user'"'"'s cellular phone, wherein one of said items of information represents first hardware for a first user, and another item of information represents second hardware for a second user; allowing said user to select a video program and to command information indicative of said video program to be sent to said website; on said website, automatically converting said video program to a compressed format compatible with said hardware, as indicated by the stored profile for the user; and storing said automatically converted video information and reconverting allowing said automatically converted video information to be sent to at least one of different cellular telephone users. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10)
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8. A cellular phone device, comprising:
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an attachment module, including at least one controlling device therein, an interface to a cell phone, and at least one array of hardware gates, said array having functions for decompressing video that is applied thereto; and wherein said attachment module includes a connection to a cellular phone.
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11. A method, comprising:
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on a website, allowing users to store profiles that indicate information that is indicative of the hardware within the user'"'"'s cellular phone, wherein one of said items of information represents first hardware for a first user, and another item of information represents second hardware for a second user; allowing said user to command information indicative of a specific video program to be sent to said website; on said website, first automatically converting said video program to a compressed format compatible with said hardware to have a first number of pixels for a first cellular phone, and automatically converting said video information in a second way to have a second number of pixels different than said first number of pixels, for a second cellular phone. - View Dependent Claims (12, 13, 14)
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1 Specification
This application claims priority to U.S. Provisional Application 60/844,207, filed Sep. 12, 2006. The disclosure of the prior application is considered part of (and is incorporated by reference in) the disclosure of this application.
Data compression allows storing more data in a smaller space, and later reconstructing the original data. The use of data compression may allow improved use of limited bandwidth over channels such as cellular networks.
It is important that many different clients be able to decompress video which has been compressed using various techniques. Accordingly, the decompression process typically is kept simple to avoid the requirement of special hardware to decompress. However, the compression process can be extremely complicated, since specialized hardware can be used for the compression.
The present application teaches a compression process intended to be used on a cellular phone over a cellular network.
The general structure and techniques, and more specific embodiments which can be used to effect different ways of carrying out the more general goals, are described herein.
The present application operates by allowing users to connect to a host website using their cellular phone. While attached to the host website, the users can view motion pictures of streaming video on the display of the cellular phone. In an embodiment, the cellular phone has a special adapter that is externally attached to the data port of the cellular phone. This special adapter uses very large scale integration “VLSI” chips to carry out decompression of the received information.
An embodiment uses extremely aggressive motion estimation algorithms for the compression and decompression, in order to attempt to obtain a ratio as high as 1000:1 compression ratio. The wavelet transform decomposes the image into different resolutions (or scales). One usually refers to these as averages and details. However, there are different levels of detail resolution and one of the parameters that we can select is the number of levels we decompose the image. One usually refers to the details to describe “the finest scale”, hierarchically down to the “coarsest” scale. In order to reconstruct the image it is necessary to transmit information about not only the magnitude of the wavelet transform coefficients, but also the position of the significant transform coefficient. This means that for each wavelet coefficient, we need to provide three numbers; magnitude plus the location in x and y. One of the challenges for transmitting wavelet transformed data efficiently is to use redundancy in the location description such that not each individual position has to be transmitted independently. A challenge in streaming media is to transmit the most significant pieces of information first. By doing this, all is not lost even if the bitstream is interrupted pre-maturely. This also provides an easy way to adjust the protocol for different bit budgets. This is referred to as progressive transmission, and may also be used in this system.
Since the decoder is a single purpose device, separate from the phone, it can be of any level of complexity.
In an embodiment, a cellular phone display may have the ability to view images that have many different forms, for example, 245×320 pixels. Such a phone requires 76,800 pixels per frame. If the streaming video is sent at a refresh rate of 24 frames per second, this means that about 442 million pixels of streaming data is necessary. Taking the Verizon™ network of CDMA networks as an example, which has a baud rate of 400,000 bits per second, this would require about 18½ minutes. At a compression rate of 250:1, this could be accomplished in about 4½ seconds and would require much less bandwidth and memory storage.
In addition, the module may store a number of images, which can be displayed as part of the displayed video. In addition, the module stores compression and decompression algorithms that allow more efficient transferring of large images over the network.
An operating system can also be downloaded to the attachment module.
Other information about the phone and/or its connection may also be obtained, for example, whether the phone has GPRS.
Once connected, the user is provided with a selection menu shown in
In operation, the user can select a video from any desired source to be sent to the website, converted, and eventually sent to the telephone. For example,
According to one aspect, much of the compression is done in VLSI circuitry, thereby enabling more aggressive compression of that information.
If the user selects uploading clips, the user then selects a source at 450, which may be, for example, a DVD at 455. Alternatively, the source may be cable television, or any other source. Uploading begins at 456, followed by a data compression stage at 457 where the data is aggressively compressed. Flow then passes to the upload/download process which allows the data to be downloaded.
Although only a few embodiments have been disclosed in detail above, other embodiments are possible and the inventors intend these to be encompassed within this specification. The specification describes specific examples to accomplish a more general goal that may be accomplished in another way. This disclosure is intended to be exemplary, and the claims are intended to cover any modification or alternative which might be predictable to a person having ordinary skill in the art. For example, the external module is optional and others could be used.
Also, the inventors intend that only those claims which use the words “means for” are intended to be interpreted under 35 USC 112, sixth paragraph. Moreover, no limitations from the specification are intended to be read into any claims, unless those limitations are expressly included in the claims. The computers described herein may be any kind of computer, either general purpose, or some specific purpose computer such as a workstation. The computer may be an Intel (e.g., Pentium or Core 2 duo) or AMD based computer, running Windows XP or Linux, or may be a Macintosh computer. The computer may also be a handheld computer, such as a PDA, cellphone, or laptop.
The programs may be written in C or Python, or Java, Brew or any other programming language. The programs may be resident on a storage medium, e.g., magnetic or optical, e.g. the computer hard drive, a removable disk or media such as a memory stick or SD media, wired or wireless network based or Bluetooth based Network Attached Storage (NAS), or other removable medium. The programs may also be run over a network, for example, with a server or other machine sending signals to the local machine, which allows the local machine to carry out the operations described herein.
Where a specific numerical value is mentioned herein, it should be considered that the value may be increased or decreased by 20%, while still staying within the teachings of the present application, unless some different range is specifically mentioned. Where a specified logical sense is used, the opposite logical sense is also intended to be encompassed.