Patent 5132992

Obviousness

Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.

Active provider: Google · gemini-2.5-pro

Obviousness

Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.

✓ Generated

Obviousness Analysis of US Patent 5132992 under 35 U.S.C. § 103

This analysis considers whether the claims of US Patent 5132992 would have been obvious to a person having ordinary skill in the art (PHOSITA) at the time of the invention (priority date January 7, 1991), by combining the teachings of the cited prior art references. A PHOSITA is motivated to combine existing technologies to improve upon known systems, address identified problems, or achieve predictable results. The core inventive features of US5132992, as identified against the prior art, include the use of multiple existing communication channels, remote selection and flexible playback timing, buffering at the receiver, VCR-like functions, and a large-scale distribution system with accessible libraries, often relying on data compression.

Combination 1: Monslow (US 4,890,320) in view of Abraham (US 4,590,516) and general knowledge of local storage/VCR functionality

References:

Claims Rendered Obvious: Independent Claim 3 (Receiving System) and elements of Independent Claim 2 (Method for Distribution).

Explanation of Obviousness and Motivation:
A PHOSITA would be motivated to combine the A/V distribution concepts of Monslow and Abraham with the known capabilities of VCRs to address the clear deficiencies highlighted in both prior art documents: the inability to control playback time and the lack of VCR-like functions.

  • Motivation: The explicit problem statements in US5132992's background section regarding Monslow and Abraham (i.e., "does not allow for the stop, pause, and multiple viewing functions of existing VCR technology" and "limits viewing to the time at which the material is ordered") [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en] provide direct motivation for a PHOSITA to integrate storage into the receiver. VCRs were already a common consumer electronic device at the time, demonstrating the desirability and feasibility of storing A/V content for time-shifted and repeated viewing.

  • Application to Claim 3:

    • "transceiver means for automatically receiving the requested information from the transmitter as compressed formatted data blocks": Monslow and Abraham teach receiving requested A/V information. While they don't explicitly teach "compressed formatted data blocks," the abstract of US5132992 itself notes "digital signal processing to achieve high rates of data compression," implying compression was a known and desirable technique for efficient A/V transmission. A PHOSITA would understand the benefits of compression for transmitting large A/V files efficiently, especially when moving from dedicated paths to potentially shared communication channels. [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en]
    • "receiver format conversion means... for converting the compressed formatted data blocks into a format suitable for storage and processing resulting in playback in real time": Given compressed transmission, converting data into a suitable format for storage and playback is a logical and obvious step.
    • "storage means... for holding the compressed formatted data": This is the key element for overcoming the limitations of Monslow and Abraham. A PHOSITA, motivated by the desire to enable user-selected playback times and VCR-like functions, would find it obvious to add storage to the receiver, drawing directly from the functionality of existing VCR technology.
    • "decompressing means... for decompressing the compressed formatted information": Obvious necessity if data is transmitted in a compressed format.
    • "output data conversion means... for playing back the decompressed information in real time at a time specified by the user": This function is directly enabled by the presence of storage means and user controls, allowing for on-demand playback, much like a VCR.

  • Application to Claim 2 (Method):

    • The steps of "buffering the processed information at the remote location" and "playing back the buffered information in real time at a time requested by the user" directly address the limitations of Monslow and Abraham. [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en] A PHOSITA, aware of VCR capabilities, would find these steps to be an obvious method for providing time-shifted viewing and user control in a remote delivery system.

Combination 2: Walter (US 4,506,387) in view of Lang (US 4,963,995) and general knowledge of remote access and data efficiency

References:

Claims Rendered Obvious: Independent Claim 1 (System for Transmission and Reception) and elements of Independent Claim 2 (Method for Distribution).

Explanation of Obviousness and Motivation:
A PHOSITA would be motivated to combine the A/V distribution framework of Walter with the local A/V manipulation (editing/copying) capabilities of Lang, while simultaneously addressing the limitations of dedicated infrastructure and inefficient data transfer.

  • Motivation: Walter's system is limited by its "dedicated cable" and requirement for the viewer to be physically at the location for ordering and viewing. [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en] A PHOSITA would be motivated to move away from dedicated infrastructure towards "multiple existing communications channels" (such as telephone, cable, or satellite, as envisioned by US5132992) to increase accessibility and reduce costs. To transmit large A/V files efficiently over such channels, the use of data compression (a known technique) would be an obvious choice to enable transmission "in a fraction of real time." [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en] Lang's focus on local copying and editing provides a clear motivation to integrate similar "view and copy" functionality into a remote delivery system, expanding user utility beyond mere viewing.

  • Application to Claim 1:

    • "source material library means prior to identification and compression": Walter implies a source of A/V material. The concept of a library from which to select items is fundamental to A/V distribution.
    • "identification encoding means for retrieving... and for assigning a unique identification code": Standard practice for managing items in a library or distribution system.
    • "conversion means... for placing the retrieved information into a predetermined format as formatted data": Necessary for digital processing and transmission over various channels.
    • "ordering means... for placing the formatted data into a sequence of addressable data blocks": Essential for structured storage and transmission of digital data, especially for remote access and playback control.
    • "compression means... for compressing the formatted and sequenced data": This step directly addresses the need for efficient transmission over common carriers, a known problem. The abstract of US5132992 highlights the benefits of compression ("high rates of data compression"). [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en]
    • "compressed data storing means... for storing as a file the compressed sequenced data... with the unique identification code": Once data is compressed, storing it in a digital library for remote retrieval becomes an obvious design choice for a PHOSITA, building on the implicit content sources of Walter and the desire for efficient storage.
    • "transmitter means... for sending at least a portion of a specific file to a specific one of the remote locations": This is the core transmission function, improved by the efficiency gained through compression, allowing for distribution over "standard telephone, cable or satellite broadcast channels" instead of Walter's dedicated cable. [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en]

  • Application to Claim 2 (Method):

    • The method steps of "storing audio and video information in a compressed data form" and "sending at least a portion of the stored compressed information to the remote location" are obvious modifications to Walter's transmission, driven by the desire for efficiency and broader network compatibility. [cite: https://patents.google.com/patent/[US5132992](/patent/US5132992)/en] The concept of a user "requesting transmission" and "receiving the sent information" is present in Walter, extended by efficiency considerations.

Conclusion on Obviousness

The key innovations of US5132992—namely, the provision of remote access to a vast library of compressed A/V content, flexible user-controlled playback times, and VCR-like functionality (including copying), all over diverse common communication channels—appear to be a combination of known elements and obvious design choices to a PHOSITA at the time of the invention. The explicit problem statements in the patent itself regarding the limitations of prior art (Monslow, Abraham, Walter, Lang) effectively describe the motivations for a PHOSITA to combine and improve upon these systems. The widespread availability of VCRs and the growing understanding of digital compression techniques for efficient data transmission further underscore the obviousness of these improvements. Therefore, several claims of US5132992, particularly the independent claims, would likely be rendered obvious by these combinations of prior art and general knowledge.

Generated 5/10/2026, 10:27:03 PM