<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-06-01</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001690666</issuerCik>
        <issuerName>Xperi Corp</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001185713</rptOwnerCik>
            <rptOwnerName>HILL RICHARD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O XPERI CORP</rptOwnerStreet1>
            <rptOwnerStreet2>3025 ORCHARD PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>SAN JOSE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-06-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>73499</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>73499</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On June 1, 2020, pursuant to the Agreement and Plan of Merger and Reorganization, dated as of December 18, 2019, as amended on January 31, 2020, by and among Xperi Corporation, a Delaware corporation (&quot;Legacy Xperi&quot;), TiVo Corporation, a Delaware corporation (&quot;TiVo&quot;), Xperi Holding Corporation (f/k/a XRAY-TWOLF HoldCo Corporation), a Delaware corporation (&quot;Xperi Holding&quot;), XRAY Merger Sub Corporation, a Delaware corporation (&quot;XRAY Merger Sub&quot;), and TWOLF Merger Sub Corporation, (&quot;TWOLF Merger Sub&quot;), XRAY Merger Sub merged with and into Legacy Xperi with Legacy Xperi as the surviving corporation (the &quot;Xperi Merger&quot;), and TWOLF Merger Sub merged with and into TiVo with TiVo as the surviving corporation (the &quot;TiVo Merger&quot; and, together with the Xperi Merger, the &quot;Mergers&quot;).  At the effective time of the Mergers (the &quot;Effective Time&quot;), each share of Legacy Xperi common stock was automatically converted into one share of Xperi Holding common stock (continued in next footnote)</footnote>
        <footnote id="F2">and each share of TiVo common stock was automatically converted into 0.455 (the &quot;TiVo Exchange Ratio&quot;) shares of Xperi Holding common stock (in addition to cash in lieu of fractional shares).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Richard Hill</signatureName>
        <signatureDate>2020-06-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
