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Methods and systems for transmitting an image with thumbnail data

專利號
US11178079B1
公開日期
2021-11-16
申請人
WhatsApp Inc.（US CA Menlo Park）
發(fā)明人
Aaron Patel; Jonathan Sheller
IPC分類
H04L12/58; H04L29/08; H04L9/06
技術(shù)領(lǐng)域
image,thumbnail,may,data,client,quality,messaging,in,or,blob
地域： CA CA Menlo Park

摘要

Exemplary embodiments relate to techniques for improving the speed and rendering quality of an image (e.g., a JPEG), particularly in an end-to-end encrypted environment. The image may be analyzed on the sending-client side and the image data may be broken into a thumbnail and a full-quality image, where the full-quality image data relies on the thumbnail data to render a high-quality image. The image is uploaded to a blob store, and a message is sent to the receiving client with image information. At the recipient side, the JPEG image data is retrieved from the blob store and the thumbnail is first rendered. Subsequently, as the remainder of the image data is received at the receiving client, the image is updated. Consequently, images are rendered faster, and the thumbnail can be automatically downloaded so that a user can determine if they wish to download the full image.

說明書

Using the information generated at blocks 612, 618, and 620, the system may generate an image message at block 622. The image message may include a reference to the image, which may include the location and/or ID returned by the blob store at block 620, the thumbnail length calculated at block 612 (and/or any other lengths calculated at block 810), and the chunk HMACs calculated at block 618. The content of the image message may be encrypted, and at block 624 the image message may be transmitted to its intended recipient(s).

The procedure depicted in FIGS. 6A (and 8A) may be performed in parallel with or in conjunction with a procedure executing on the recipient-side device. FIGS. 6B (and 8B) is a flowchart depicting exemplary logic 650 (and 850) performed by a system, such as a receiving client, for requesting and displaying a progressive image.

At block 652, the receiving client may perform an E2EE session setup. Block 652 may be the counterpart to block 602, and may include similar or corresponding steps.

At block 654, the receiving client may receive an image message using the E2EE session that was set up in block 652. The image message may include encrypted content, such as an encrypted reference to an image, data lengths, and HMACs.

權(quán)利要求

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