Abstract: An audio/video (A/V) recording and communication doorbell, including a camera, a speaker, a microphone, a power manager, a battery, an AC/DC rectifier, and a DC/DC converter. The doorbell is configured for connection to an external AC power source through the AC/DC rectifier and the DC/DC converter. The power manager is configured to draw power, up to a threshold power, from the AC power source and to draw supplemental power from the battery such that the power drawn from the AC power source never exceeds the threshold power. The present A/V recording and communication doorbell can thus be connected to an existing household AC power supply and an existing doorbell signaling device without causing inadvertent sounding of the signaling device.

Abstract: A wireless speaker device configured for use with a wireless A/V recording and communication device, such as a doorbell. The wireless speaker device, which includes a speaker, may connect to the user's local area network (LAN), such as a Wi-Fi network. The LAN is connected to a wide area network (WAN), such as the Internet and/or a public switched telephone network (PSTN). When the wireless A/V recording and communication device detects a visitor, it sends a signal, via the LAN, to at least one device in the WAN, such as a server and/or a service. In response, the at least one device in the WAN sends a signal, via the LAN, to the wireless speaker device. The signal to the wireless speaker device includes a command for the wireless speaker device to emit a tone through its speaker. The wireless speaker device then emits a tone through its speaker to alert the user that a visitor is at the wireless A/V recording and communication device.

Abstract: Streaming and storing video for audio/video (A/V) recording and communication devices in accordance with various embodiments of the present disclosure are provided. In one embodiment, a method for an A/V recording and communication device comprises: recording video image data; executing a write operation to write the video image data at a write rate; executing a read operation to read the video image data at a first read rate that is greater than the write rate; continuing to read the video image data at the first read rate until the read operation catches up to the write operation; reading the video image data at a second read rate equal to the write rate; and transmitting streaming video to a client device, wherein a beginning portion of the streaming video is streamed at a first stream rate and thereafter streaming at a second stream rate less than the first stream rate.

Abstract: An audio/video (A/V) recording and communication doorbell, including a camera, a speaker, a microphone, a power manager, a battery, an AC/DC rectifier, and a DC/DC converter. The doorbell is configured for connection to an external AC power source through the AC/DC rectifier and the DC/DC converter. The power manager is configured to draw power, up to a threshold power, from the AC power source and to draw supplemental power from the battery such that the power drawn from the AC power source never exceeds the threshold power. The present A/V recording and communication doorbell can thus be connected to an existing household AC power supply and an existing doorbell signaling device without causing inadvertent sounding of the signaling device.

Abstract: An audio/video (A/V) recording and communication doorbell, including a camera, a speaker, a microphone, a power manager, a battery, an AC/DC rectifier, and a DC/DC converter. The doorbell is configured for connection to an external AC power source through the AC/DC rectifier and the DC/DC converter. The power manager is configured to draw power, up to a threshold power, from the AC power source and to draw supplemental power from the battery such that the power drawn from the AC power source never exceeds the threshold power. The present A/V recording and communication doorbell can thus be connected to an existing household AC power supply and an existing doorbell signaling device without causing inadvertent sounding of the signaling device.

Abstract: An audio/video (A/V) recording and communication doorbell, including a camera, a speaker, a microphone, a power manager, a battery, an AC/DC rectifier, and a DC/DC converter. The doorbell is configured for connection to an external AC power source through the AC/DC rectifier and the DC/DC converter. The power manager is configured to draw power, up to a threshold power, from the AC power source and to draw supplemental power from the battery such that the power drawn from the AC power source never exceeds the threshold power. The present A/V recording and communication doorbell can thus be connected to an existing household AC power supply and an existing doorbell signaling device without causing inadvertent sounding of the signaling device.

Abstract: An audio/video (A/V) recording and communication doorbell, including a camera, a speaker, a microphone, a power manager, a battery, an AC/DC rectifier, and a DC/DC converter. The doorbell is configured for connection to an external AC power source through the AC/DC rectifier and the DC/DC converter. The power manager is configured to draw power, up to a threshold power, from the AC power source and to draw supplemental power from the battery such that the power drawn from the AC power source never exceeds the threshold power. The present A/V recording and communication doorbell can thus be connected to an existing household AC power supply and an existing doorbell signaling device without causing inadvertent sounding of the signaling device.

Abstract: The present embodiments solve the problem of low-quality stored footage from video stream by storing copies of data packets at a local storage device of the A/V recording and communication device. The locally stored data is subsequently (e.g., after the live stream has terminated) uploaded to a remote storage device. If any data packets are lost during the upload process, those lost data packets can be re-sent from the local storage device to the remote storage device so that the complete recording can be stored at the remote storage device. The subsequent upload process may, in some embodiments, comprise a reliable data transfer protocol.

Abstract: A wireless speaker device configured for use with a wireless A/V recording and communication device, such as a doorbell. The wireless speaker device, which includes a speaker, may connect to the user's local area network (LAN), such as a Wi-Fi network. The LAN is connected to a wide area network (WAN), such as the Internet and/or a public switched telephone network (PSTN). When the wireless A/V recording and communication device detects a visitor, it sends a signal, via the LAN, to at least one device in the WAN, such as a server and/or a service. In response, the at least one device in the WAN sends a signal, via the LAN, to the wireless speaker device. The signal to the wireless speaker device includes a command for the wireless speaker device to emit a tone through its speaker. The wireless speaker device then emits a tone through its speaker to alert the user that a visitor is at the wireless A/V recording and communication device.

Abstract: A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12, includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process 14 having at least one stage for removing at least a fraction of non-acid oxygenated hydrocarbons from the Fischer-Tropsch reaction water 12 to produce a primary water-enriched stream 16, a secondary treatment stage comprising at least one membrane separation process 28 for removing at least some suspended solids and acidic oxygenated hydrocarbons from at least a portion of the primary water-enriched stream 16 to produce a secondary water-enriched stream 34 and a tertiary treatment stage comprising a dissolved salt and organic removal stage 36 for removing at least some dissolved salts and organic constituents from at least a portion of the secondary water-enriched stream 34.

Abstract: A process for the production of highly purified water from Fischer-Tropsch reaction water, which process includes at least the steps of a primary treatment stage comprising biological treatment for removing at least a fraction of dissolved organic carbon from the Fischer-Tropsch reaction water to produce a primary water-enriched stream, a secondary treatment stage comprising solid-liquid separation for removing at least some solids from at least a portion of the primary water-enriched stream to produce a secondary water-enriched stream, and a tertiary treatment stage comprising a dissolved salt and organic removal step for removing at least some dissolved salts and organic constituents from at least a portion of the secondary water-enriched stream.

Abstract: A process for the production of highly purified water from Fischer-Tropsch reaction water includes distillation as a primary treatment stage, evaporation as a secondary treatment stage, aerobic treatment as a tertiary treatment stage, solid-liquid separation as a quartic treatment stage, and membrane separation as a final treatment stage.

Abstract: A process for the production of highly purified water 44 from Fischer-Tropsch reaction water 12 includes distillation 14 as a primary treatment stage, biological treatment including anaerobic digestion 20 and aerobic digestion 22 as a secondary treatment stage, solid-liquid separation 32 as a tertiary treatment stage and a dissolved salt and organic removal stage 40 as final treatment stage.

Abstract: A process for the production of purified water from Fischer-Tropsch reaction water wherein the purified water is an aqueous stream having a COD of between 20 and 500 mg/l, a pH of between 6.0 and 9.