DCT

2:26-cv-00390

Qosound IP Innovations LLC v. Samsung Electronics Co Ltd

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 2:26-cv-00390, E.D. Tex., 05/11/2026
  • Venue Allegations: Plaintiff alleges venue is proper in the Eastern District of Texas because Defendant Samsung America maintains a regular and established place of business in the district, including a corporate office and retail store, and has committed acts of infringement there. Venue is alleged to be proper for Samsung Electronics Co., Ltd. as it is not a resident of the United States.
  • Core Dispute: Plaintiff alleges that Defendant's consumer electronics-including smartphones, earbuds, smart TVs, and soundbars-infringe five U.S. patents related to adaptive audio processing, noise suppression, and voice quality enhancement in noisy environments or during cellular transmission errors.
  • Technical Context: The technology at issue involves digital signal processing to improve the perceived quality of audio for listeners using electronic devices in environments with ambient noise or unstable network conditions.
  • Key Procedural History: The complaint alleges that Samsung had pre-suit knowledge of the asserted patents through several channels, including citations of the patent family as prior art during the prosecution of Samsung's own U.S. and European patents. Additionally, the complaint notes Samsung's 2017 acquisition of Harman International Industries, whose subsidiary allegedly had a prior business relationship with the original assignee of the asserted patents.

Case Timeline

Date Event
2012-09-02 Earliest Priority Date for '766, '767, and '333 Patents
2013-03-07 Priority Date for '203 Patent
2014-03-05 Priority Date for '791 Patent
2015-12-08 '766 Patent Issued
2015-12-08 '767 Patent Issued
2016-03-29 '333 Patent Issued
2016-09-06 '203 Patent Issued
2017-01-01 Samsung acquired Harman International Industries, Inc. (approx. date)
2017-06-26 Samsung's European Patent No. EP 3,457,402 Filed
2018-04-03 '791 Patent Issued
2020-01-01 Earliest Accused TV/Soundbar Model Year Launch (approx. date)
2020-11-03 Samsung's U.S. Patent No. 11,418,877 Filed
2021-09-15 Samsung's European Patent No. EP 3,457,402 Granted
2022-08-16 Samsung's U.S. Patent No. 11,418,877 Granted
2026-05-11 Complaint Filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 9,208,766 - "Computer Program Product For Adaptive Audio Signal Shaping for Improved Playback in A Noisy Environment"

  • Issued: December 8, 2015

The Invention Explained

  • Problem Addressed: The patent's background describes the difficulty of understanding audio or speech from a device like a mobile phone when in a noisy environment, such as a moving car '766 Patent, col. 1:24-31 It notes that simply increasing the playback volume is often an uncomfortable or insufficient solution '766 Patent, col. 2:6-15
  • The Patented Solution: The invention is a computer program that improves audio quality by adaptively modifying the audio signal based on ambient noise '766 Patent, col. 2:23-30 The system continuously monitors the "near-end" noise, determines its characteristics, and when a change in noise is detected, it identifies and applies an "optimal signal shaping filter" to the "far-end" audio signal before playback '766 Patent, FIG. 6A '766 Patent, col. 7:17-48 This shaping is intended to make the audio signal more perceptible over the specific background noise.
  • Technical Importance: This adaptive, spectrum-based approach was designed to provide a more sophisticated solution than simple volume amplification to maintain audio intelligibility in dynamic, real-world listening conditions '766 Patent, col. 2:23-29

Key Claims at a Glance

The complaint asserts at least independent Claim 1 Compl. ¶41 Claim 1 recites a non-transitory computer program product with logic for enabling a computer to perform the following:

  • Continuously monitoring a near-end noise audio signal through a single microphone;
  • Continuously determining near-end noise characteristics from that signal;
  • Comparing current near-end noise characteristics to previous ones to detect a change;
  • Upon detecting a change, identifying an optimal signal shaping filter based on the near-end noise characteristics;
  • Applying the optimal filter to the far-end audio signal to create an optimized signal; and
  • Outputting the optimized signal to a speaker.

U.S. Patent No. 9,208,767 - "Method For Adaptive Audio Signal Shaping for Improved Playback in a Noisy Environment"

  • Issued: December 8, 2015

The Invention Explained

  • Problem Addressed: The patent addresses the same problem as its family member, the '766 Patent: the degradation of perceived audio quality from electronic devices due to ambient noise '767 Patent, col. 1:24-31
  • The Patented Solution: The '767 Patent claims a method for achieving the same solution described in the '766 Patent. The method comprises the steps of continuously monitoring local noise via a microphone, analyzing its characteristics, detecting changes in the noise, and in response, identifying and applying an optimal shaping filter to the incoming audio signal to enhance its clarity for the listener '767 Patent, abstract '767 Patent, col. 4:45-65
  • Technical Importance: As a method patent, it protects the specific process of adaptively enhancing audio, complementing the system and computer program product claims of its related patents.

Key Claims at a Glance

The complaint asserts at least independent Claim 1 Compl. ¶57 Claim 1 recites a method for improving audio quality, comprising the steps of:

  • Continuously monitoring a near-end noise audio signal through a microphone;
  • Continuously determining near-end noise characteristics from that signal;
  • Comparing the near-end noise characteristics to previous characteristics to detect a change;
  • Upon detecting a change, identifying an optimal signal shaping filter based on the new characteristics;
  • Applying that filter to the far-end audio signal to produce an optimized signal; and
  • Outputting the optimized signal to the speaker.

U.S. Patent No. 9,299,333 - "System for Adaptive Audio Signal Shaping for Improved Playback in A Noisy Environment"

  • Issued: March 29, 2016
  • Technology Synopsis: Belonging to the same family as the '766 and '767 patents, this patent claims a system for improving audio quality in noisy environments Compl. ¶69 The system comprises tangible hardware components and modules-including a microphone, a characteristics module, a comparison module, and a selection module-that work together to monitor ambient noise and adaptively apply a signal-shaping filter to an incoming speech or audio signal '333 Patent, abstract '333 Patent, claim 1
  • Asserted Claims: Independent claims 1 and 16 Compl. ¶73
  • Accused Features: The accused functionalities include "Voice Focus, Mic Mode, and Noise Reduction" on Samsung smartphones and the noise-responsive audio processing pipelines in Samsung Galaxy earbuds, Q-Series soundbars, and Smart TVs Compl. ¶75 Compl. ¶78

U.S. Patent No. 9,437,203 - "Error Concealment for Speech Decoder"

  • Issued: September 6, 2016
  • Technology Synopsis: This patent describes a technology for improving cellular voice call quality when data packets are lost or corrupted during transmission Compl. ¶86 The invention proposes a method that dynamically adjusts the decoding latency based on the quality of the wireless link: when the link quality is poor, the decoding process is intentionally delayed to allow the decoder to use information from subsequently received packets to better correct errors in the current frame '203 Patent, abstract '203 Patent, col. 2:5-12 When link quality improves, the latency is reduced to normal '203 Patent, claim 1
  • Asserted Claims: At least independent claim 1 Compl. ¶90
  • Accused Features: The complaint targets Samsung smartphones' implementation of the "Enhanced Voice Services (EVS) codec, including Channel Aware Mode, and adaptive jitter-buffer and packet-loss-concealment voice processing" Compl. ¶89 Compl. ¶92

U.S. Patent No. 9,934,791 - "Noise Suppressor"

  • Issued: April 3, 2018
  • Technology Synopsis: This patent discloses a noise suppression technique that operates in the time domain, which can reduce computational complexity and latency compared to frequency-domain methods Compl. ¶101 '791 Patent, col. 2:27-33 The method involves monitoring the noise level and signal level of an incoming audio sample, calculating a "noise confidence parameter" based on the difference, and using this parameter to derive a gain factor that is applied to the signal to produce an enhanced speech signal '791 Patent, abstract '791 Patent, claim 2
  • Asserted Claims: At least independent claim 2 Compl. ¶105
  • Accused Features: The complaint alleges infringement by the "receive-path noise-suppression functionality" in Samsung smartphones and the "on-earbud speech-enhancement functionality" in Galaxy earbuds Compl. ¶104

III. The Accused Instrumentality

Product Identification

The complaint identifies a broad range of Samsung consumer electronics, including Samsung Smart TVs (QLED, Neo QLED, OLED, and The Frame models from 2020-2025), Samsung Galaxy S24 and S25 series smartphones, Samsung Q-Series soundbars, and Samsung Galaxy earbuds (Buds3 Pro and Buds4 Pro) Compl. ¶35 Compl. ¶40 Compl. ¶72

Functionality and Market Context

The complaint targets specific audio processing features within these products, such as Active Voice Amplifier (AVA/AVA Pro), AI Sound Pro, Voice Focus, Noise Reduction, Adaptive Sound, and the Enhanced Voice Services (EVS) codec Compl. ¶35 These features are alleged to perform functions such as monitoring ambient noise to adjust audio playback for clarity, reducing background noise during voice calls, and managing voice data to conceal transmission errors Compl. ¶43 Compl. ¶75 Compl. ¶92 The complaint positions these as features on a "wide range of consumer electronics," suggesting they are integral to Samsung's offerings in major product categories Compl. ¶4

No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

'766 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
code for continuously monitoring a near-end noise audio signal through the single microphone; The accused AVA and AVA Pro features use a built-in, on-device microphone to continuously monitor the near-end noise audio signal in the viewing environment. ¶43 col. 7:21-25
code for continuously determining near-end noise characteristics from said near-end noise audio signal; The system continuously determines near-end noise characteristics from the monitored signal. ¶43 col. 7:25-28
code for comparing said near-end noise characteristics from previous near-end noise characteristics to detect a change in said near-end noise audio signal; The system compares the current noise characteristics against previously determined ones to detect a change in the noise signal. ¶43 col. 7:29-32
upon detecting a change, code for identifying an optimal signal shaping filter based on said near-end noise characteristics; Upon detecting a change, the system identifies an optimal signal-shaping filter based on the current noise characteristics. ¶43 col. 7:35-42
code for applying said optimal signal shaping filter to the far-end audio signal to produce an optimized far-end audio signal; The identified filter is applied to the incoming far-end audio signal to produce an optimized signal. ¶43 col. 7:42-45
code for outputting said optimized far-end audio signal to the speaker. The optimized far-end audio signal is output through the television's speaker. ¶43 col. 7:45-48
  • Identified Points of Contention:
    • Scope Questions: Claim 1 recites "a single microphone." The accused products, particularly Smart TVs and soundbars, may incorporate microphone arrays. A central question for claim construction may be whether the accused systems' use of one or more microphones to capture a single logical stream of ambient noise satisfies the "single microphone" limitation.
    • Technical Questions: The claim requires identifying an "optimal" signal shaping filter. The infringement analysis may turn on evidence showing whether the accused products' filter selection algorithm is "based on said near-end noise characteristics" as claimed and whether the selected filter can be considered "optimal" in the context of the patent's disclosure.

'767 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
continuously monitoring a near-end noise audio signal through the microphone; The accused AVA/AVA Pro features in Smart TVs and soundbars use a built-in microphone to continuously monitor ambient noise in the listening environment. ¶59; ¶60 col. 4:48-50
continuously determining near-end noise characteristics from said near-end noise audio signal; The system continuously determines the characteristics of the monitored noise. ¶59; ¶60 col. 4:50-51
comparing said near-end noise characteristics from previous near-end noise characteristics to detect a change...; The system compares current noise characteristics against previously determined characteristics to detect changes. ¶59; ¶60 col. 4:52-54
upon detecting a change identifying an optimal signal shaping filter based on said near-end noise characteristics; Upon detecting a change, the system identifies a corresponding noise-responsive, optimal signal-shaping filter. ¶59; ¶60 col. 4:55-57
applying said optimal signal shaping filter to the far-end audio signal to produce an optimized far-end audio signal; The filter is applied to the incoming far-end audio signal to produce an optimized signal. ¶59; ¶60 col. 4:58-60
outputting said optimized far-end audio signal to the speaker. The resulting optimized signal is output through the television's or soundbar's speaker output path. ¶59; ¶60 col. 4:61-62
  • Identified Points of Contention:
    • Scope Questions: Claim 1 recites a device having "a single speaker." The accused Smart TVs and soundbars have multiple speaker drivers. The complaint preemptively addresses this by alleging that the "multi-driver array on the TV" is treated as "one logical output path" Compl. ¶59 This framing raises a critical claim construction question: can the term "a single speaker" be interpreted to cover a multi-driver speaker system that functions as a singular output for the processed audio?
    • Technical Questions: As with the '766 Patent, a factual dispute may arise over whether the accused systems' process for selecting and applying a filter technically matches the claimed steps, particularly the identification of an "optimal" filter based on a detected change in noise.

V. Key Claim Terms for Construction

  • The Term: "a single speaker" '767 Patent, claim 1
  • Context and Importance: This term is critical because the primary accused products for this patent, Smart TVs and soundbars, physically contain multiple speaker drivers. The infringement case against these products depends on construing this term to cover a multi-driver array. Practitioners may focus on this term because the plaintiff has explicitly advanced a "logical output path" theory to meet this limitation Compl. ¶59
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: The specification discusses playback "through a loudspeaker or earphone," using singular, generic terms that focus on the function of audio output rather than the number of physical components '767 Patent, col. 4:59-60 A party could argue that this supports an interpretation where a speaker system, regardless of its internal components, functions as the singular "speaker" for the purpose of the claimed method.
    • Evidence for a Narrower Interpretation: The plain language of "single" suggests one and only one. The patent's figures, such as the block diagram in FIG. 6A, depict a single speaker symbol receiving the output signal. A party could argue that the claim is limited to devices with only one physical speaker transducer, consistent with the common understanding of the term and the patent's exemplary embodiments.
  • The Term: "a single microphone" '766 Patent, claim 1
  • Context and Importance: Similar to "single speaker," this term is vital for the infringement analysis against modern devices like soundbars and high-end TVs that often use microphone arrays for functions like room calibration or voice commands. The viability of the infringement claim against these products may hinge on the construction of this term.
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: The patent's focus is on capturing the "near-end noise" to analyze its characteristics '766 Patent, col. 7:21-28 A party might argue that as long as an array is used to generate a single, representative channel of ambient noise for analysis, it is functioning as a "single microphone" for the purposes of the invention, which is concerned with one source of noise, not the number of transducers used to capture it.
    • Evidence for a Narrower Interpretation: The term "single" has a clear and unambiguous ordinary meaning. The specification consistently refers to noise being "picked up by the microphone of the near-end mobile phone" in the singular '766 Patent, col. 7:21-23, and diagrams like FIG. 6A show a single microphone input. A party would argue this limits the claim to its plain meaning, excluding devices with multiple microphones.

VI. Other Allegations

  • Indirect Infringement: The complaint alleges that Samsung induces infringement by actively marketing, advertising, and providing instructional materials (such as user manuals and online help pages) that encourage and guide end-users to operate the accused features in an infringing manner Compl. ¶49 Compl. ¶66 Compl. ¶83 It also alleges contributory infringement, stating that Samsung sells the accused products knowing they are especially adapted for infringing use and are not staple articles of commerce Compl. ¶50 Compl. ¶67 Compl. ¶84
  • Willful Infringement: The complaint alleges both pre-suit and post-suit willful infringement. The basis for pre-suit knowledge includes Samsung's citation of the '766 Patent as prior art in its own patent prosecution, an examiner's citation of the patent family against a Samsung European patent application, and Samsung's 2017 acquisition of Harman, which allegedly had a prior business relationship with the patents' original assignee, QoSound, Inc. Compl. ¶48 Compl. ¶64 Compl. ¶82 Post-suit willfulness is based on continued infringement after receiving notice via the complaint Compl. ¶48

VII. Analyst's Conclusion: Key Questions for the Case

This case appears to center on the application of patents drafted with mobile phone embodiments in mind to a wider range of modern consumer electronics. The key questions for the court will likely be:

  • A core issue will be one of definitional scope: can the claim terms "single microphone" and "single speaker," which are used in the asserted patents, be construed to cover the multi-component microphone and speaker arrays found in the accused Smart TVs and soundbars, or are they strictly limited to one physical component?

  • A key evidentiary question will be one of functional correspondence: does the accused "Active Voice Amplifier" technology perform the specific, multi-step process required by the claims-namely, detecting a discrete "change" in noise characteristics over time and then identifying an "optimal" filter in response-or does it operate on a different technical principle that falls outside the claim scope?

  • A central question for damages will be the establishment of pre-suit knowledge and intent: can the plaintiff demonstrate that Samsung's citation of the patents-in-suit during its own patent prosecution, combined with its acquisition of a company with a prior relationship to the technology's originator, constitutes the "subjective willfulness" required for enhanced damages?

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