Obviousness — US Patent 8804727

Under 35 U.S.C. § 103, an invention is considered obvious if the differences between the claimed invention and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art (PHOSITA). This analysis requires identifying the scope and content of the prior art, distinguishing the claimed invention from the prior art, and determining the motivation for a PHOSITA to combine or modify prior art references to arrive at the claimed invention, along with any secondary considerations of non-obviousness (though none are requested or provided in this context).

The US patent 8804727 describes an integrated system for communicating programming across various media, including television, radio, broadcast print, and computer programming, utilizing embedded signals for control, personalization, monitoring, and encryption/decryption at subscriber stations. The patent itself provides a detailed discussion of existing prior art and its perceived limitations, which forms the basis for this obviousness analysis.

Core Features of US8804727 (as presented by the patent):
The invention's core features revolve around:

Embedding digital control and data signals within various media broadcasts (e.g., television vertical blanking interval (VBI) or inaudible audio frequencies).
Using these embedded signals to automatically control multiple types of apparatus at a subscriber station, such as microcomputers, video recorders, and other peripherals, often in a synchronized and personalized manner.
Generating user-specific information (e.g., graphic overlays) at the subscriber station based on these control signals and combining it with the broadcast content.
Monitoring usage data and automatically transferring these records to remote stations for billing or ratings.
Encrypting and decrypting programming and/or instructions based on embedded keys or instructions.
Providing ease of use, transparency, and privacy for personalized programming.

Prior Art References and their Limitations (as described by US8804727):

Dataspeed Corporation (Lotus Development Corporation) / Equatorial Communications Company systems: These systems transmit real-time financial data over radio frequencies to microcomputers with receivers, modems, and decryptors. Subscribers program their stations to select data.
- Limitations: They only transmit data; they do not control data processing or simultaneously cause generation of user-specific information at multiple receiver stations. They lack capacity to cause subscriber computers to process data in ways not inputted by subscribers. They also cannot overlay information other than what is transmitted to all stations simultaneously, nor can they cause receiver computers to generate user-specific information for overlays.
Lambert U.S. Pat. No. 4,381,522: Describes a cable television system controlled by a minicomputer that responds to viewer signals (by telephone) to generate a schedule for prerecorded programs and actuate video players for transmission.
- Limitations: It cannot automatically schedule or transmit programming not immediately loaded on players. It lacks capacity to load video players, identify programming, verify playback, or record programming from any source. It cannot operate under broadcaster-transmitted instructions, nor can it insert signals to control automatic operation of apparatus other than television receivers. It also lacks capacity to coordinate programming content with other transmitted programming or control separate systems like a radio and television simulcast.
Monitoring Systems (e.g., Haselwood, et al. U.S. Pat. No. 4,025,851; Crosby U.S. Pat. No. 3,845,391; Greenberg U.S. Pat. No. 4,547,804): These systems monitor programming and generate "ratings" using embedded digital signals (Haselwood on a select line of each TV frame), or audio codes (Crosby). Greenberg monitors multiple channels sequentially for audio/visual quality.
- Limitations: They monitor only single stations/channels/units, not multiple channels simultaneously or combined media. They monitor either what is transmitted or what is received, but not both. They assume specific signal formats/locations and cannot vary them, distinguish signal absence, or interpret non-monitored signals. They lack capacity to identify and decrypt encrypted signals or simultaneously record and transfer information to a remote geographic location. The patent notes that embedded signals in these systems are used only to identify programming.
Video Tape Recorders: Have capacity for automatic delayed recording of television transmissions based on manual viewer input.
- Limitations: Lack capacity for automatically embedding/removing signals, controlling external apparatus, retransmitting prerecorded programming while controlling its decryption based on embedded keys, or operating based on control signals to record user-specific information at multiple subscriber stations.
"Interactive video" systems: Can locate prerecorded TV programming and digital data on a disc and transmit them to TV receivers and computers.
- Limitations: The patent asserts similar limitations as video tape recorders regarding embedding signals, controlling external apparatus, retransmission with decryption, and recording user-specific information.
Decoders and Decryptors ("Addressable" systems): These systems restrict programming use to authorized subscribers and can control individual subscriber station decoder/decryptor apparatus via broadcast control instructions (e.g., turning on/off service for non-payment).
- Limitations: Lack capacity for decrypting combined media programming, selectively decrypting embedded control instructions in unencrypted programming, selectively transferring programming/instructions to a decryptor, transferring decryptor output to one of multiple output apparatus, automatically identifying decryption keys, or identifying/recording decryptor input/output identity. The patent also notes that each service broadcasts encrypted programming and controls its own dedicated receiver/decryptor at each subscriber station.

Obviousness Analysis under 35 U.S.C. § 103

A PHOSITA in the early 1980s, facing the limitations described above, would be motivated to improve broadcast communication systems by integrating existing technologies to achieve greater automation, interactivity, and personalization. The following combination of prior art references would render many claims of US8804727 obvious:

Combination: Haselwood U.S. Pat. No. 4,025,851 + Dataspeed/Equatorial systems + Lambert U.S. Pat. No. 4,381,522 + Addressable Systems + General Knowledge of Computer Graphics and Video Overlay.

1. Embedding Digital Control Instructions in Broadcast Signals:

Haselwood U.S. Pat. No. 4,025,851 explicitly teaches embedding digital signals in television programming, specifically on a select line of each frame, for the purpose of monitoring and identifying programming.
Addressable systems were known to control specific individual subscriber station apparatus (e.g., decoder/decryptors) by means of control instructions transmitted in broadcasts.
Motivation to Combine: A PHOSITA, observing Haselwood's technique for embedding digital data in TV signals and the existence of addressable systems for broadcasting control instructions, would find it obvious to use Haselwood's embedding method to carry control instructions (rather than just identification data) to subscriber apparatus. This would allow broadcasters to initiate actions at the receiver more dynamically, overcoming the limitation of previous embedded signals serving "only one function". The idea of placing these signals in non-visible (VBI) or inaudible (audio frequency ranges not normally heard) portions of the broadcast, as described by US8804727, would be a conventional engineering choice to avoid interference with primary content.

2. Transmitting Signals with Programming to a Subscriber Microcomputer for Processing:

Dataspeed/Equatorial systems already transmit digital data over broadcast frequencies (radio, satellite) to microcomputers that are equipped to receive and process digital signals, and include decryptors.
Motivation to Combine: Given that Dataspeed/Equatorial systems deliver data to microcomputers, and embedded control signals can be transmitted (as per Haselwood/Addressable systems combination), it would be an obvious next step for a PHOSITA to combine these. The goal would be to overcome Dataspeed's limitation that it "only transmits data; it does not control data processing". By embedding instructions via Haselwood's method within the broadcast accompanying the data (or separate from it but synchronizing), the broadcaster could command the subscriber's microcomputer to process the received data in specific ways.

3. Generating and Overlaying User-Specific Information (Graphics):

The patent itself acknowledges that "graphic overlay techniques" for combining graphic information onto video are "well known in the art". The description of the IBM Personal Computer with a "PC-MicroKey Model 1300 System with Techmar Graphics Master Card" (a commercially available product at the time) further demonstrates the existing capability of microcomputers to generate and overlay graphics.
Dataspeed/Equatorial systems deliver user-selected data (e.g., financial data) to microcomputers.
Motivation to Combine: A PHOSITA, wanting to enhance the user experience beyond merely displaying raw data from a Dataspeed-type system, would be motivated to utilize the microcomputer's known graphics capabilities. It would be obvious to program the microcomputer to visualize the user-specific data (e.g., a stock portfolio graph). Furthermore, combining this local, user-specific graphic with a related broadcast image (e.g., a financial news program) using "well known" overlay techniques would be an obvious design choice to provide context and immediacy, thereby overcoming Dataspeed's limitation regarding not generating user-specific information or overlays. The embedded control signals (from the Haselwood/Addressable systems combination) would provide the necessary synchronization to display the personalized overlay at the appropriate moment in the broadcast, as demonstrated by the "GRAPHICS ON" command example in the patent.

4. Controlling External Apparatus at the Subscriber Station:

Lambert U.S. Pat. No. 4,381,522 demonstrates a minicomputer controlling media playback devices (video tape, disc, or film players) in a cable TV system.
Addressable systems show that broadcasters can send control instructions to individual subscriber apparatus.
Motivation to Combine: Extending the control functionality of embedded broadcast instructions (from the Haselwood/Addressable systems combination) to other peripherals at the subscriber station, such as VCRs for automatic recording or printers for "broadcast print," would be an obvious engineering improvement. A PHOSITA would seek to create a more integrated and automated subscriber experience, building on Lambert's concept of computer-controlled media devices. This would address Lambert's limitation of not being able to act on instructions transmitted by broadcasters to control peripheral systems.

5. Monitoring Usage and Remote Data Transfer:

Monitoring systems (Crosby, Haselwood, Greenberg) specifically teach monitoring programming and generating ratings. Greenberg's system even monitors multiple channels sequentially for quality.
Dataspeed/Equatorial systems use modems for data reception, implying communication capabilities, and the general concept of an "automatic dialer" for contacting remote sites was known.
Motivation to Combine: If systems exist to monitor program usage (Haselwood/Crosby/Greenberg), and microcomputers can communicate data (Dataspeed's use of modems; general telephony), it would be obvious to combine these to automatically transfer the collected monitoring data from the subscriber station back to a remote location (e.g., a central "ratings" or billing station). This directly addresses Greenberg's limitation of lacking capacity to "record and also transfer information to a remote geographic location simultaneously".

6. Encryption and Decryption:

Dataspeed/Equatorial systems include "decryptors" in their receiver apparatus.
Addressable systems utilize "decoder/decryptor apparatus" to restrict programming use to authorized subscribers.
Motivation to Combine: Given the established use of decryption in both data transmission (Dataspeed) and conditional access (Addressable systems), it would be obvious for a PHOSITA to apply these known encryption/decryption techniques to the embedded control signals and the content they protect. This would enhance security and enable conditional access for the broader, integrated system described by the invention, thereby addressing the limitations of prior art decryptors that lacked capacity for decrypting combined media programming or selectively decrypting embedded control instructions.

Conclusion:
While US8804727 describes a sophisticated integrated system, many of its individual components and the underlying concepts for their integration were present in the prior art identified by the patent itself. A PHOSITA would have been motivated to combine the features of:

Embedding digital signals (Haselwood) for purposes of control (Addressable systems) rather than just identification.
Transmitting these control signals and data to microcomputers (Dataspeed/Equatorial).
Utilizing the microcomputer's capability to generate graphics and overlay them onto broadcast video (general knowledge and available hardware like the Techmar Graphics Master Card), triggered by the embedded control signals for synchronization.
Expanding computer control to various peripherals (Lambert, Video Tape Recorders).
Automating the reporting of monitoring data (Greenberg) via telecommunication means (Dataspeed's modems, automatic dialers).
Applying known encryption/decryption methods (Dataspeed, Addressable systems) to secure the transmissions.

The motivation for such a combination would be to overcome the explicit limitations of the prior art systems, particularly their lack of integrated, automated, and personalized control over subscriber-side data processing and peripherals, and to provide a more interactive and controlled broadcast experience. Therefore, a PHOSITA would have found the system described in US8804727, as a whole, to be obvious.